UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-CSRS CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-07136 Name of Fund: MuniYield Pennsylvania Insured Fund Fund Address: P.O. Box 9011 Princeton, NJ 08543-9011 Name and address of agent for service: Robert C. Doll, Jr., Chief Executive Officer, MuniYield Pennsylvania Insured Fund, 800 Scudders Mill Road, Plainsboro, NJ, 08536. Mailing address: P.O. Box 9011, Princeton, NJ, 08543-9011 Registrant's telephone number, including area code: (609) 282-2800 Date of fiscal year end: 10/31/06 Date of reporting period: 11/01/05 - 04/30/06 Item 1 - Report to Stockholders Semi-Annual Reports April 30, 2006 MuniYield Florida Insured Fund MuniYield New Jersey Insured Fund, Inc. MuniYield Pennsylvania Insured Fund (BULL LOGO) Merrill Lynch Investment Managers www.mlim.ml.com Mercury Advisors A Division of Merrill Lynch Investment Managers www.mercury.ml.com These reports, including the financial information herein, are transmitted to shareholders of MuniYield Florida Insured Fund, MuniYield New Jersey Insured Fund, Inc. and MuniYield Pennsylvania Insured Fund for their information. This is not a prospectus. Past performance results shown in these reports should not be considered a representation of future performance. The Funds have leveraged their Common Shares or Stock and intend to remain leveraged by issuing Preferred Shares or Stock to provide the Common Shareholders or Common Stock Shareholders with potentially higher rates of return. Leverage creates risks for Common Shareholders or Common Stock Shareholders, including the likelihood of greater volatility of net asset value and market price of the Common Shares or Stock, and the risk that fluctuations in the short-term dividend rates of the Preferred Shares or Stock may affect the yield to Common Shareholders or Common Stock Shareholders. Statements and other information herein are as dated and are subject to change. A description of the policies and procedures that the Funds use to determine how to vote proxies relating to portfolio securities is available (1) without charge, upon request, by calling toll-free 1-800-637-3863; (2) at www.mutualfunds.ml.com; and (3) on the Securities and Exchange Commission's Web site at http://www.sec.gov. Information about how the Funds vote proxies relating to securities held in the Funds' portfolios during the most recent 12-month period ended June 30 is available (1) at www.mutualfunds.ml.com; and (2) on the Securities and Exchange Commission's Web site at http://www.sec.gov. MuniYield Florida Insured Fund MuniYield New Jersey Insured Fund, Inc. MuniYield Pennsylvania Insured Fund Box 9011 Princeton, NJ 08543-9011 (GO PAPERLESS LOGO) It's Fast, Convenient, & Timely! To sign up today, go to www.icsdelivery.com/live. MuniYield Florida Insured Fund MuniYield New Jersey Insured Fund, Inc. MuniYield Pennsylvania Insured Fund Announcement to Shareholders On February 15, 2006, BlackRock, Inc. ("BlackRock") and Merrill Lynch & Co., Inc. ("Merrill Lynch") entered into an agreement to contribute Merrill Lynch's investment management business, Merrill Lynch Investment Managers, L.P. and certain affiliates (including Fund Asset Management, L.P. and Merrill Lynch Investment Managers International Limited), to BlackRock to create a new independent company that will be one of the world's largest asset management firms with over $1 trillion in assets under management (based on combined assets under management as of March 31, 2006). The transaction is expected to close in the third quarter of 2006, at which time the new company will operate under the BlackRock name. The Fund's Board of Directors/Trustees has approved a new investment advisory agreement with BlackRock Advisors, Inc. or its successor ("BlackRock Advisors") on substantially the same terms and for the same advisory fee as the current investment advisory agreement with the Investment Advisor. If the agreement is approved by the Fund's shareholders, BlackRock Advisors is expected to become the Fund's investment adviser upon the closing of the transaction between Merrill Lynch and BlackRock. Swap Agreements The Funds may invest in swap agreements, which are over-the-counter contracts in which one party agrees to make periodic payments based on the change in market value of a specified bond, basket of bonds, or index in return for periodic payments based on a fixed or variable interest rate or the change in market value of a different bond, basket of bonds or index. Swap agreements may be used to obtain exposure to a bond or market without owning or taking physical custody of securities. Swap agreements involve the risk that the party with whom each Fund has entered into a swap will default on its obligation to pay the Fund and the risk that the Fund will not be able to meet its obligation to pay the other party to the agreement. SEMI-ANNUAL REPORTS APRIL 30, 2006 A Letter From the President Dear Shareholder You may be aware that changes are on the horizon at Merrill Lynch Investment Managers ("MLIM"). On February 15, 2006, Merrill Lynch announced plans to combine the firm's investment advisory business, including MLIM, with another highly regarded investment manager - BlackRock, Inc. ("BlackRock"). We believe this merger of asset management strength will benefit our investors. MLIM is a leading investment management organization with over $576 billion in assets under management globally and 2,757 employees in 17 countries. It offers over 100 investment strategies in vehicles ranging from mutual funds to institutional portfolios. BlackRock is one of the largest publicly traded investment management firms in the United States with $463.1 billion in assets under management and 1,839 employees. It manages assets on behalf of institutional and individual investors worldwide through a variety of equity, fixed income, liquidity and alternative investment products. At the completion of the transaction, which is expected in the third quarter of this year, the resultant firm will be a top-10 investment manager worldwide with over $1 trillion in assets under management.* The combined company will provide a wider selection of high-quality investment solutions across a range of asset classes and investment styles. MLIM and BlackRock possess complementary capabilities that together create a well-rounded organization uniting some of the finest money managers in the industry. At the same time, the firms share similar values and beliefs - they are focused on delivering excellence on behalf of clients, and both make investment performance their single most important mission. In short, the merger only reinforces our commitment to shareholders. Most of MLIM's investment products - including mutual funds, separately managed accounts, annuities and variable insurance funds - eventually will carry the "BlackRock" name. As a shareholder in one or more MLIM-advised mutual funds, you will receive a proxy package in the coming weeks in connection with this transaction. After you receive this information, should you have any questions or concerns, do not hesitate to contact your financial advisor. As always, we thank you for entrusting us with your investment assets, and we look forward to continuing to serve your investment needs with even greater strength and scale as the new BlackRock. Sincerely, (Robert C. Doll, Jr.) Robert C. Doll, Jr. President and Chief Investment Officer Merrill Lynch Investment Managers * $1.039 trillion in assets under management as of March 31, 2006. Data, including assets under management, are as of March 31, 2006. SEMI-ANNUAL REPORTS APRIL 30, 2006 A Discussion With Your Funds' Portfolio Managers New municipal issuance declined during the six-month period, helping tax- exempt bonds to outperform their taxable counterparts but also limiting opportunities to restructure the portfolios. Describe the recent market environment relative to municipal bonds. Long-term bond yields rose sharply during the six-month period, with much of the increase occurring in March and April 2006. Bond prices, which move opposite of yields, declined. Bond prices were pressured as investors focused on solid economic growth, both globally and in the United States, and renewed inflationary pressures deriving from rising commodity prices. First quarter 2006 gross domestic product growth was recently estimated at 4.8%, well above the 1.7% rate recorded in the fourth quarter of 2005. The Federal Reserve Board (the Fed) continued to raise short-term interest rates at each of its meetings during the period, bringing the federal funds target rate to 4.75% at period-end, and to 5% with another interest rate hike on May 10, 2006. In response, the Treasury curve continued to flatten, with short-term interest rates rising more than longer-term interest rates. Over the past six months, 30-year U.S. Treasury bond yields rose 41 basis points (.41%) to 5.17% and 10-year U.S. Treasury note yields rose 50 basis points to 5.07%, the highest level since May 2002. While the municipal yield curve also flattened during the period, the market's strong technical position provided significant price support. This allowed municipal bond prices to improve slightly or decline much less than those of their taxable counterparts. As measured by Municipal Market Data, yields on AAA-rated issues maturing in 30 years fell six basis points to 4.53% while yields on AAA-rated issues maturing in 10 years rose 16 basis points to 4.08%. For the most part, the recent outperformance of the tax-exempt market has been fostered by a dramatic decline in new bond issuance so far in 2006. In 2005, more than $408 billion in new long-term tax-exempt bonds was underwritten, a new annual record and an increase of more than 13% compared to 2004. Over the past six months, $170 billion in long-term municipal bonds was issued, a decline of 8.6% versus the same period a year earlier. The record new issuance in 2005 was largely triggered by a 47% increase in refunding activity as issuers took advantage of historically low bond yields and a flattening yield curve to refinance outstanding higher-couponed debt. Year-to-date through April 2006, refunding issuance declined more than 55% relative to the first four months of 2005. This decline already has led some analysts to reduce their forecasts for 2006 new issuance from the $350 billion - $370 billion range to the $300 billion - $325 billion range. Lower annual issuance would further solidify the tax-exempt market's already positive technical position. The tax-exempt market has continued to enjoy strong investor demand. As reported by the Investment Company Institute, long-term municipal bond funds received net new monies of $5.0 billion in 2005 - a sharp reversal from the $3.7 billion outflow in 2004. During the first quarter of 2006, tax-exempt mutual funds received over $9.3 billion, slightly higher than the $8.9 billion inflow during the same period in 2005. Recent statistics from AMG Data Services indicate that, thus far in 2006, weekly cash flows into long-term municipal bond funds averaged over $300 million, a significant improvement from the weekly average of $65 million in December 2005. Looking ahead, the fundamentals for the tax-exempt bond market appear favorable, and continued positive cash flows are anticipated. Given their attractive yields relative to comparable U.S. Treasury bonds, and the prospects for reduced issuance in 2006, we believe municipal bonds could enjoy solid results in the coming months. MuniYield Florida Insured Fund Describe conditions in the State of Florida. Florida's economy has outperformed that of both the nation and other southern states, and appears likely to continue this trend in the foreseeable future. The state's mix of solid demographics and increasing job growth among diversified industries is expected to continue to encourage migration into Florida. Although national economic trends have put pressure on the state, we believe Florida is well positioned given its record of proactive management and financial flexibility. The state's enacted fiscal year 2005-2006 budget is $64.7 billion, an increase of 12% from the prior year. The budget reflects a combination of spending constraints, with spending below anticipated personal income growth, and increased revenue growth. Of the increased revenue, not all is expected to be permanent, as some stems primarily from the reconstruction and replacement of property destroyed by hurricanes and, therefore, is not recurring. SEMI-ANNUAL REPORTS APRIL 30, 2006 Fiscal discipline has afforded the state the opportunity to provide tax relief in the form of tax-free shopping days, reduced sales tax on equipment, tax credits and a phaseout of the intangible tax. Three areas of the budget account for 93% of the total expenditures - education at 52%, health and human services at 26% and public safety at 15%. Revenues for the first four months of the fiscal year were $602 million, 14% higher than the same period in the prior fiscal year. How did the Fund perform during the period? For the six-month period ended April 30, 2006, the Common Shares of MuniYield Florida Insured Fund had net annualized yields of 5.19% and 5.49%, based on a period-end per share net asset value of $14.57 and a per share market price of $13.77, respectively, and $.375 per share income dividends. Over the same period, the total investment return on the Fund's Common Shares was +1.70%, based on a change in per share net asset value from $14.72 to $14.57, and assuming reinvestment of all distributions. The Fund's return, based on net asset value, lagged the +2.16% average return of the Lipper Florida Municipal Debt Funds category for the six-month period. (Funds in this Lipper category limit their investment to securities exempt from taxation in Florida or a city in Florida). For the most part, performance was impacted as the yield curve flattened and short and intermediate maturities underperformed. We had exposure to these sectors through bonds that had been prerefunded - thereby transforming several of our longer-dated issues into intermediate-maturity issues - and higher-coupon bonds priced to a short call. Despite their underperformance on a total return basis, these bonds were acquired in a higher interest rate environment and, as such, contribute meaningfully to the Fund's yield. This supports our long-term commitment to providing shareholders with an attractive level of income and allowed the Fund to maintain an above-average yield versus its peers. To a lesser extent, the Fund's total return performance was affected by its conservative investment parameters. This prohibited us from investing in non-investment grade issues, which outperformed the high-grade market as credit spreads narrowed during the period. For a description of the Fund's total investment return based on a change in the per share market value of the Fund's Common Shares (as measured by the trading price of the Fund's shares on the New York Stock Exchange), and assuming reinvestment of dividends, please refer to the Financial Highlights section of this report. As a closed-end fund, the Fund's shares may trade in the secondary market at a premium or discount to the Fund's net asset value. As a result, total investment returns based on changes in the market value of the Fund's Common Shares can vary significantly from total investment return based on changes in the Fund's net asset value. What changes were made to the portfolio during the period? We did not alter our strategy or make meaningful changes to the portfolio's composition during the six-month period. We continued to focus on increasing the income provided to shareholders and muting the Fund's net asset value volatility. To that end, we remained fully invested throughout the period in order to augment yield. In making new purchases, we generally focused on premium-coupon bonds in the 20-year - 25-year maturity range whenever they became available, although we did begin to see value in the 15-year area of the curve and continue to explore opportunities there. Given the extent of the curve flattening, spreads are appearing wider now in the 20-year sector of the curve, so we are able to capture some of the most attractive yields on the curve without having to extend to the longest maturities. Issuance of Florida municipal bonds increased less than 3% during the period compared to the same period six months a year ago. However, new issuance in the latter three months was down 32% compared to the same three months in 2005. The reduction in supply has meant few opportunities to restructure the portfolio. For the most part, we are seeing supply concentrated in the 15-year - 20-year area, most of these being insured issues with 4% to 4.5% coupons. We remain committed to structuring bonds with 5% to 5.25% coupons, although the cost for new issues with these characteristics has been prohibitive. SEMI-ANNUAL REPORTS APRIL 30, 2006 A Discussion With Your Funds' Portfolio Managers (continued) For the six-month period ended April 30, 2006, the Fund's Auction Market Preferred Shares (AMPS) had average yields of 2.96% for Series A and 3.04% for Series B. The Fed raised the short-term interest rate target 100 basis points during the six-month period, and this continued to affect the Fund's borrowing costs. We would expect additional increases in the cost of funds to be more limited as the Fed nears a pause in its monetary tightening campaign. Despite the interest rate increases during the period, the tax-exempt yield curve maintained a positive slope, allowing us to borrow at a lower rate than where we invest. This continued to generate an income benefit to the holders of Common Shares from the leveraging of Preferred Shares. However, should the spread between short-term and long-term interest rates narrow, the benefits of leveraging will decline and, as a result, reduce the yield on the Fund's Common Shares. At the end of the period, the Fund's leverage amount, due to AMPS, was 36.90% of total net assets, before the deduction of Preferred Shares. (For a more complete explanation of the benefits and risks of leveraging, see page 10 of this report to shareholders.) How would you characterize the Fund's position at the close of the period? We would characterize the Fund's position as fairly neutral in terms of interest rate risk. At period-end, we were looking to increase the portfolio's exposure to bonds in the 10-year - 20-year maturity range, where we see value emerging. Given the degree of yield-curve flattening that has occurred over the course of the Fed's interest rate-hiking campaign, we believe this maturity range could be ready to outperform. We remain fully invested, consistent with our efforts to augment shareholder income, and intend to use periods of volatility to pursue higher-coupon bonds whenever they are attractively priced. MuniYield New Jersey Insured Fund, Inc. Describe conditions in the State of New Jersey. In the November elections, New Jersey Democrats retained control of the state senate and assembly, as well as the governor's office. Former New Jersey senator Jon Corzine was elected the state's 54th governor and immediately faced the challenges of the fiscal year 2007 budget, including funding the public pension system, replenishing the Transportation Trust Fund and complying with court-mandated school construction spending. The resulting $31 billion budget proposed by the governor provided for a $2.6 billion increase in overall spending and called for a 1% sales tax hike and a 35-cent per-pack cigarette tax increase. Surprisingly, no gasoline tax increase was included, although a higher percentage of the existing tax is slated to be applied to the ailing Transportation Trust Fund. Even so, that leaves the bulk of the state's transportation needs to be funded by $6 billion in new debt that will be issued over the next five years, as well as the refinancing of $1.7 billion in existing debt. Although this proposed budget is in balance for fiscal year 2007, New Jersey still faces a structural deficit of $1.5 billion heading into fiscal year 2008. From a credit-rating perspective, a positive in the governor's proposal is its reduced reliance on one-time revenues to balance the budget. Relatively late in the period, New Jersey issued an additional $650 million worth of tax and revenue anticipation notes, which were given the highest short-term credit ratings from the major rating agencies and were well received by the market. How did the Fund perform during the period? For the six-month period ended April 30, 2006, the Common Stock of MuniYield New Jersey Insured Fund, Inc. had net annualized yields of 4.91% and 4.98%, based on a period-end per share net asset value of $14.90 and a per share market price of $14.70, respectively, and $.363 per share income dividends. Over the same period, the total investment return on the Fund's Common Stock was +1.39%, based on a change in per share net asset value from $15.07 to $14.90, and assuming reinvestment of all distributions. The Fund's total return, based on net asset value, trailed the +2.43% average return of the Lipper New Jersey Municipal Debt Funds category for the six-month period. (Funds in this Lipper category limit their investment to those securities exempt from taxation in New Jersey or a city in New Jersey.) Notably, the Fund was disadvantaged relative to many of its peers by its conservative investment parameters. Specifically, the Fund is limited in its ability to invest in lower-quality issues, which outperformed during the period as credits spreads (versus higher-quality issues of comparable maturity) tightened dramatically. Per its investment parameters, roughly 83% of the portfolio is invested in AAA-rated, insured bonds. SEMI-ANNUAL REPORTS APRIL 30, 2006 Another factor that weighed heavily on the Fund's performance was the fact that a number of seasoned holdings with higher coupons were called by their issuers. Given our limited ability to buy lower-rated issues and a sharp decline in new-issue supply during the period, particularly in the first quarter of 2006, it was especially difficult to compensate for the income lost to calls. For a description of the Fund's total investment return based on a change in the per share market value of the Fund's Common Stock (as measured by the trading price of the Fund's shares on the New York Stock Exchange), and assuming reinvestment of dividends, please refer to the Financial Highlights section of this report. As a closed-end fund, the Fund's shares may trade in the secondary market at a premium or discount to the Fund's net asset value. As a result, total investment returns based on changes in the market value of the Fund's Common Stock may vary significantly from total investment returns based on changes in the Fund's net asset value. What changes were made to the portfolio during the period? Activity during the period was extremely limited, due in large part to a lack of opportunities in both the primary and secondary markets, particularly in the latter half of the period. For the six months ended April 30, 2006, New Jersey municipal bond supply was down 48% compared to the same period a year ago. Notwithstanding the limitations imposed by the market and our own investment parameters, we felt that the portfolio was appropriately positioned for the yield curve flattening that we had anticipated, and we saw little need to make significant changes. A number of factors have combined to sharply reduce the overall supply of municipal issues in the early months of 2006. The low interest rate environment of 2005 may have exhausted much of the potential new-issue supply, and with interest rates having risen somewhat over the past few months, some issuers may have been discouraged from coming to market. Looking ahead, though, the proposed 2007 budget includes $6 billion of new debt to be issued for the Transportation Trust Fund over five years. As of this writing, the first installment of $2.8 billion is scheduled to be issued in May 2006 and includes refinancing for $1.7 billion of existing debt. For the six-month period ended April 30, 2006, the Fund's Auction Market Preferred Stock (AMPS) had average yields of 2.70% for Series A and 2.72% for Series B. The Fed raised the short-term interest rate target 100 basis points during the six-month period, and this continued to affect the Fund's borrowing costs. We would expect additional increases in the cost of funds to be more limited as the Fed nears a pause in its monetary tightening campaign. Despite the interest rate increases during the period, the tax-exempt yield curve maintained a positive slope, allowing us to borrow at a lower rate than where we invest. This continued to generate an income benefit to the holders of Common Stock from the leveraging of Preferred Stock. However, should the spread between short-term and long-term interest rates narrow, the benefits of leveraging will decline and, as a result, reduce the yield on the Fund's Common Stock. At the end of the period, the Fund's leverage amount, due to AMPS, was 35.92% of total net assets, before the deduction of Preferred Stock. (For a more complete explanation of the benefits and risks of leveraging, see page 10 of this report to shareholders.) How would you characterize the Fund's position at the close of the period? Throughout the period, the Fund remained relatively neutral with respect to interest rate risk, and with a high-quality credit profile. Our yield curve outlook has changed in response to recent speculation that the Fed may be closer to the end of its monetary tightening program. Therefore, we believe the majority of the curve flattening is behind us and we are in the early stages of reducing our exposure to the long end of the curve. We now see the most attractive value closer to the middle of the curve, around the 10-year - 15-year range. While we believe there is still some risk of further Fed tightening, the markets tend to anticipate and react to those moves before the fact, so we prefer to be at the front end of that trend. SEMI-ANNUAL REPORTS APRIL 30, 2006 A Discussion With Your Funds' Portfolio Managers (concluded) MuniYield Pennsylvania Insured Fund Describe conditions in the Commonwealth of Pennsylvania. Pennsylvania continued to protect its credit ratings of Aa2, AA and AA from Moody's, Standard & Poor's and Fitch, respectively, by maintaining conservative budgeting practices, a relatively low debt burden and a more diversified service economy. Following a difficult period at the start of the decade, the commonwealth's finances have improved and stabilized. Through March, revenue collections for fiscal year 2006 were $505.4 million, or 2.8% above initial estimates, largely thanks to strong corporate and personal income tax collection. Property-tax reform continues to be a key topic on the legislative agenda. Pennsylvania's House and Senate have put forth competing bills, with the House seeking larger property tax reductions through new state taxes for schools and the Senate proposing smaller property tax cuts that hinge largely on gambling tax revenue and voter-approved local wage tax shifts. The two chambers will try to negotiate a compromise that can pass both assemblies for a final decision by Governor Edward Rendell. With a gubernatorial election this November, it seems unlikely that the governor will increase personal income tax rates without the more tangible benefits of property tax reform. Broad-based job growth continues to be a favorable trend in the commonwealth. For the first quarter of 2006, employment was up 1.2%, slightly below the national growth rate of 1.5%. Pennsylvania's unemployment rate was 4.5% in March 2006, down from 5.2% in March 2005. Personal income growth of 1.5% in the Keystone State trailed the U.S. average growth rate of 2.3% in the last quarter of 2005, but overall reflects a wealth level on par with the nation. How did the Fund perform during the period? For the six-month period ended April 30, 2006, the Common Shares of MuniYield Pennsylvania Insured Fund had net annualized yields of 5.24% and 5.50%, based on a period-end per share net asset value of $15.48 and a per share market price of $14.73, respectively, and $.402 per share income dividends. Over the same period, the total investment return on the Fund's Common Shares was +2.13%, based on a change in per share net asset value from $15.57 to $15.48, and assuming reinvestment of all distributions. The Fund provided an above-average yield during the six-month period and its total return, based on net asset value, surpassed the +1.95% average return of the Lipper Pennsylvania Municipal Debt Funds category. (Funds in this Lipper category limit their investment to those securities exempt from taxation in Pennsylvania or a city in Pennsylvania.) The Fund's outperformance is primarily attributed to positive security selection. Pennsylvania's municipal bond issuance fell 38% in the first quarter of 2006, more than that experienced by the broader municipal market. Despite the limited investment opportunities, the Fund was able to realize price outperformance from its portfolio of high-quality Pennsylvania municipal bonds. Furthermore, the Fund's slightly longer maturity compared to its peers proved advantageous, as it allowed the portfolio to maintain an above-average yield, which added to incremental total return. As the yield curve continued to flatten over the six-month period, long-term bonds outperformed short-term issues, and our focus on this sector of the curve enhanced Fund results. For a description of the Fund's total investment return based on a change in the per share market value of the Fund's Common Shares (as measured by the trading price of the Fund's shares on the New York Stock Exchange), and assuming reinvestment of dividends, please refer to the Financial Highlights section of this report. As a closed-end fund, the Fund's shares may trade in the secondary market at a premium or discount to the Fund's net asset value. As a result, total investment returns based on changes in the market value of the Fund's Common Shares can vary significantly from total investment returns based on changes in the Fund's net asset value. What changes were made to the portfolio during the period? As mentioned previously, new issuance of Pennsylvania debt declined significantly, with new issues of 25-year - 30-year bonds bordering on non-existent over the period. As a result, we made no material changes to the structure and composition of the portfolio. SEMI-ANNUAL REPORTS APRIL 30, 2006 We maintained our focus on protecting the Fund's net asset value and providing shareholders with an above-average level of income. To that end, we continued to target additional yield by investing in longer-dated bonds. The Fund continued to have a slightly long duration. Although we did seek to move the Fund closer to a neutral duration during the period, limited availability of appropriately structured issues precluded our efforts. Importantly, the Fund was essentially fully invested throughout the period, consistent with our goal of maintaining an attractive level of income. For the six-month period ended April 30, 2006, the Fund's Auction Market Preferred Shares (AMPS) had average yields of 2.87% for Series A, 2.80% for Series B and 2.91% for Series C. The Fed's interest rate hikes continue to have a material impact on the Fund's borrowing costs. The Fed raised the short-term interest rate target 100 basis points during the six-month period. We would expect additional increases in the cost of funds to be more limited as the Fed nears a pause in its monetary tightening campaign. Despite the interest rate increases during the period, the tax-exempt yield curve maintained a positive slope, allowing us to borrow at a lower rate than where we invest. This continued to generate an income benefit to the holders of Common Shares from the leveraging of Preferred Shares. However, should the spread between short-term and long-term interest rates narrow, the benefits of leveraging will decline and, as a result, reduce the yield on the Fund's Common Shares. At the end of the period, the Fund's leverage amount, due to AMPS, was 36.47% of total net assets, before the deduction of Preferred Shares. (For a more complete explanation of the benefits and risks of leveraging, see page 10 of this report to shareholders.) How would you characterize the Fund's position at the close of the period? We ended the period with a fully invested portfolio and a positive stance on interest rate risk. We maintain a favorable outlook for the municipal market, based on declining issuance and increasing demand on the part of high net worth investors, U.S. subsidiaries of foreign banks and larger U.S. banking corporations that have merged and are seeking tax-exempt income. After 16 consecutive interest rate hikes, we believe the Fed is prepared to pause in order to assess the impact that its measured monetary tightening campaign has had on economic growth and inflation. However, if there are additional rate increases, we would expect the municipal yield curve to steepen in the short term, particularly relative to the very flat U.S. Treasury yield curve, which should continue to provide attractive opportunities on the long end. Against this backdrop, we intend to continue to look for maturities in the 25-year area and favor a neutral to slightly long portfolio duration, which we believe offers the benefit of incremental yield. We remain committed to our strategy of investing in high-quality bonds issued by high-tax states. Ultimately, we expect that above-average yields will provide competitive Fund returns over time. Robert D. Sneeden Vice President and Portfolio Manager MuniYield Florida Insured Fund Theodore R. Jaeckel Jr., CFA Vice President and Portfolio Manager MuniYield New Jersey Insured Fund, Inc. William R. Bock Vice President and Portfolio Manager MuniYield Pennsylvania Insured Fund May 24, 2006 SEMI-ANNUAL REPORTS APRIL 30, 2006 The Benefits and Risks of Leveraging The Funds utilize leveraging to seek to enhance the yield and net asset value of their Common Shares or Common Stock. However, these objectives cannot be achieved in all interest rate environments. To leverage, the Funds issue Preferred Shares or Stock, which pays dividends at prevailing short-term interest rates, and invests the proceeds in long-term municipal bonds. The interest earned on these investments, net of dividends to Preferred Shares or Stock, is paid to Common Shareholders or Common Stock shareholders in the form of dividends, and the value of these portfolio holdings is reflected in the per share net asset value of the Fund's Common Shares or Stock. However, in order to benefit Common Shareholders or Common Stock shareholders, the yield curve must be positively sloped; that is, short-term interest rates must be lower than long-term interest rates. At the same time, a period of generally declining interest rates will benefit Common Shareholders or Common Stock shareholders. If either of these conditions change, then the risks of leveraging will begin to outweigh the benefits. To illustrate these concepts, assume a fund's Common Shares or Stock capitalization of $100 million and the issuance of Preferred Shares or Stock for an additional $50 million, creating a total value of $150 million available for investment in long-term municipal bonds. If prevailing short- term interest rates are approximately 3% and long-term interest rates are approximately 6%, the yield curve has a strongly positive slope. The fund pays dividends on the $50 million of Preferred Shares or Stock based on the lower short-term interest rates. At the same time, the fund's total portfolio of $150 million earns the income based on long-term interest rates. In this case, the dividends paid to Preferred Shareholders or Common Stock shareholders are significantly lower than the income earned on the fund's long- term investments, and therefore the Common Shareholders or Common Stock shareholders are the beneficiaries of the incremental yield. However, if short- term interest rates rise, narrowing the differential between short-term and long-term interest rates, the incremental yield pickup on the Common Shares or Stock will be reduced or eliminated completely. At the same time, the market value of the fund's Common Shares or Stock (that is, its price as listed on the New York Stock Exchange) may, as a result, decline. Furthermore, if long- term interest rates rise, the Common Shares' or Stock's net asset value will reflect the full decline in the price of the portfolio's investments, since the value of the fund's Preferred Shares or Stock does not fluctuate. In addition to the decline in net asset value, the market value of the fund's Common Shares or Stock may also decline. As a part of their investment strategy, the Funds may invest in certain securities whose potential income return is inversely related to changes in a floating interest rate ("inverse floaters"). In general, income on inverse floaters will decrease when short-term interest rates increase and increase when short-term interest rates decrease. Investments in inverse floaters may be characterized as derivative securities and may subject the Funds to the risks of reduced or eliminated interest payments and losses of invested principal. In addition, inverse floaters have the effect of providing investment leverage and, as a result, the market value of such securities will generally be more volatile than that of fixed rate, tax-exempt securities. To the extent the Funds invest in inverse floaters, the market value of each Fund's portfolio and the net asset value of each Fund's shares may also be more volatile than if the Funds did not invest in these securities. As of April 30, 2006, the percentages of MuniYield Florida Insured Fund's, MuniYield New Jersey Insured Fund, Inc.'s and MuniYield Pennsylvania Insured Fund's total net assets invested in inverse floaters were 5.89%, 9.03% and 12.06%, respectively, before the deduction of Preferred Shares or Stock. SEMI-ANNUAL REPORTS APRIL 30, 2006 Portfolio Information Quality Profiles as of April 30, 2006 Percent of MuniYield Florida Insured Fund Total By S&P/Moody's Rating Investments AAA/Aaa 90.8% AA/Aa 1.0 A/A 4.6 BBB/Baa 1.6 Other* 2.0 * Includes portfolio holdings in short-term investments and variable rate demand notes. Percent of MuniYield New Jersey Insured Fund, Inc. Total By S&P/Moody's Rating Investments AAA/Aaa 83.0% AA/Aa 3.6 A/A 3.6 BBB/Baa 9.3 Other* 0.5 * Includes portfolio holdings in short-term investments. Percent of MuniYield Pennsylvania Insured Fund Total By S&P/Moody's Rating Investments AAA/Aaa 82.5% AA/Aa 3.0 A/A 2.5 BBB/Baa 8.4 NR 2.9 Other* 0.7 * Includes portfolio holdings in short-term investments. Dividend Policy The Funds' dividend policy is to distribute all or a portion of their net investment income to their shareholders on a monthly basis. In order to provide shareholders with a more stable level of dividend distributions, the Funds may at times pay out less than the entire amount of net investment income earned in any particular month and may at times in any particular month pay out such accumulated but undistributed income in addition to net investment income earned in that month. As a result, the dividends paid by the Funds for any particular month may be more or less than the amount of net investment income earned by the Funds during such month. The Funds' current accumulated but undistributed net investment income, if any, is disclosed in the Statement of Net Assets, which comprises part of the financial information included in these reports. SEMI-ANNUAL REPORTS APRIL 30, 2006 Schedule of Investments MuniYield Florida Insured Fund (In Thousands) Face Amount Municipal Bonds Value District of Columbia--0.8% $ 1,000 Metropolitan Washington Airports Authority, D.C., Airport System Revenue Bonds, AMT, Series A, 5.25% due 10/01/2032 (c) $ 1,028 Florida--145.0% 1,300 Alachua County, Florida, School Board, COP, 5.25% due 7/01/2029 (a) 1,370 700 Boynton Beach, Florida, Utility System Revenue Refunding Bonds, 6.25% due 11/01/2020 (b)(c) 814 1,720 Broward County, Florida, Educational Facilities Authority Revenue Bonds (Nova Southeastern University), 5% due 4/01/2031 (p) 1,774 3,445 Collier County, Florida, Capital Improvement Revenue Refunding Bonds, 5% due 10/01/2024 (h) 3,582 1,000 Daytona Beach, Florida, Utility System Revenue Refunding Bonds, Series B, 5% due 11/15/2027 (c) 1,028 2,110 First Florida Governmental Financing Commission Revenue Bonds, 5.70% due 7/01/2017 (h) 2,177 1,000 Flagler County, Florida, Capital Improvement Revenue Bonds, 5% due 10/01/2035 (h) 1,033 1,150 Florida HFA, Housing Revenue Bonds (Brittany Rosemont Apartments), AMT, Series C-1, 6.75% due 8/01/2014 (a) 1,162 430 Florida Housing Finance Corporation, Homeowner Mortgage Revenue Refunding Bonds, AMT, Series 4, 6.25% due 7/01/2022 (f) 439 2,000 Florida State Board of Education, Capital Outlay, GO, Public Education, Series B, 5% due 6/01/2031 (c) 2,054 6,190 Florida State Board of Education, Lottery Revenue Bonds, Series A, 6% due 7/01/2015 (c) 6,766 1,000 Florida State Governmental Utility Authority, Utility Revenue Bonds (Lehigh Utility System), 5.125% due 10/01/2033 (a) 1,037 1,860 Florida State Turnpike Authority, Turnpike Revenue Bonds (Department of Transportation), Series B, 5% due 7/01/2030 1,895 1,400 Fort Myers, Florida, Utility System Revenue Refunding Bonds, 5% due 10/01/2031 (h) 1,452 3,000 Hernando County, Florida, School Board, COP, 5% due 7/01/2035 (h) 3,090 (In Thousands) Face Amount Municipal Bonds Value Florida (continued) $ 3,700 Highlands County, Florida, Health Facilities Authority, Hospital Revenue Bonds (Adventist Health System), Series A, 6% due 11/15/2011 (i) $ 4,113 1,780 Hillsborough County, Florida, Port District Revenue Bonds (Tampa Port Authority Project), AMT, 5% due 6/01/2026 (h) 1,817 Hillsborough County, Florida, School Board, COP (h): 6,000 5.375% due 7/01/2009 (i) 6,289 1,000 5% due 7/01/2029 1,025 2,000 Jacksonville Electric Authority, Florida, Water and Sewer System Revenue Bonds, Series A, 5.375% due 10/01/2030 (h) 2,026 Jacksonville, Florida, Economic Development Commission, Health Care Facilities Revenue Bonds (Mayo Clinic--Jacksonville) (h): 1,000 Series A, 5.50% due 11/15/2036 1,072 750 Series B, 5.50% due 11/15/2036 804 1,140 Jacksonville, Florida, Economic Development Commission, IDR (Metropolitan Parking Solutions Project), AMT, 5.50% due 10/01/2030 (l) 1,188 1,455 Jacksonville, Florida, Guaranteed Entitlement Revenue Refunding and Improvement Bonds, 5.25% due 10/01/2032 (c) 1,526 Jacksonville, Florida, Port Authority, Seaport Revenue Bonds, AMT (h): 1,025 5.625% due 11/01/2010 (i) 1,092 1,225 5.625% due 11/01/2026 1,292 2,000 Lakeland, Florida, Electric and Water Revenue Refunding Bonds, Series A, 5% due 10/01/2028 (h) 2,046 1,000 Lee County, Florida, Airport Revenue Bonds, AMT, Series A, 6% due 10/01/2029 (f) 1,076 2,285 Lee County, Florida, Capital Revenue Bonds, 5.25% due 10/01/2023 (a) 2,439 50 Lee County, Florida, HFA, S/F Mortgage Revenue Bonds (Multi-County Program), AMT, Series A, Sub-Series 3, 7.45% due 9/01/2027 (d)(e)(g) 51 100 Lee County, Florida, Hospital Board of Directors, Hospital Revenue Bonds (Memorial Health System), VRDN, Series A, 3.76% due 4/01/2025 (n) 100 1,000 Leesburg, Florida, Capital Improvement Revenue Bonds, 5.25% due 10/01/2034 (c) 1,059 Portfolio Abbreviations To simplify the listings of portfolio holdings in the Schedules of Investments, we have abbreviated the names of many of the securities according to the list at right. AMT Alternative Minimum Tax (subject to) COP Certificates of Participation DRIVERS Derivative Inverse Tax-Exempt Receipts DATES Daily Adjustable Tax-Exempt Securities EDA Economic Development Authority EDR Economic Development Revenue Bonds GO General Obligation Bonds HFA Housing Finance Agency IDA Industrial Development Authority IDR Industrial Development Revenue Bonds M/F Multi-Family PCR Pollution Control Revenue Bonds RIB Residual Interest Bonds S/F Single-Family VRDN Variable Rate Demand Notes SEMI-ANNUAL REPORTS APRIL 30, 2006 Schedule of Investments (continued) MuniYield Florida Insured Fund (In Thousands) Face Amount Municipal Bonds Value Florida (continued) Marco Island, Florida, Utility System Revenue Bonds (h): $ 300 5.25% due 10/01/2021 $ 320 1,000 5% due 10/01/2033 1,029 1,000 Martin County, Florida, Utilities System Revenue Bonds, 5.125% due 10/01/2033 (a) 1,036 2,000 Miami Beach, Florida, Water and Sewer Revenue Bonds, 5.75% due 9/01/2025 (a) 2,160 Miami-Dade County, Florida, Aviation Revenue Bonds, AMT, Series A: 7,500 5% due 10/01/2033 (f) 7,594 5,000 (Miami International Airport), 6% due 10/01/2024 (c) 5,402 3,875 Miami-Dade County, Florida, Aviation Revenue Refunding Bonds (Miami International Airport), AMT, Series A, 5% due 10/01/2038 (m) 3,936 2,000 Miami-Dade County, Florida, Educational Facilities Authority Revenue Bonds (University of Miami), Series A, 5.75% due 4/01/2029 (a) 2,148 Miami-Dade County, Florida, Expressway Authority, Toll System Revenue Bonds, Series B (c): 1,000 5.25% due 7/01/2027 1,060 3,875 5% due 7/01/2033 3,990 3,480 Miami-Dade County, Florida, Health Facilities Authority, Hospital Revenue Refunding Bonds, DRIVERS, Series 208, 7.124% due 8/15/2017 (a)(k) 3,977 1,655 Miami-Dade County, Florida, IDA, IDR (BAC Funding Corporation Project), Series A, 5.375% due 10/01/2030 (a) 1,753 2,000 Miami-Dade County, Florida, School Board COP, Series A, 5.50% due 10/01/2009 (f)(i) 2,111 1,865 Miami-Dade County, Florida, Solid Waste System Revenue Bonds, 5.25% due 10/01/2030 (h) 1,983 Miami-Dade County, Florida, Subordinate Special Obligation Revenue Bonds, Series A (h)(q): 4,375 5.186% due 10/01/2031 1,130 5,735 5.203% due 10/01/2033 1,332 4,765 Orange County, Florida, Educational Facilities Authority, Educational Facilities Revenue Refunding Bonds (Rollins College Project), 5.50% due 12/01/2032 (a) 5,120 Orange County, Florida, Health Facilities Authority, Hospital Revenue Bonds: 600 (Adventist Health System), 6.25% due 11/15/2024 656 1,835 (Orlando Regional Healthcare), 6% due 12/01/2012 (i) 2,049 1,000 Orange County, Florida, Sales Tax Revenue Refunding Bonds, Series A, 5.125% due 1/01/2023 (c) 1,049 6,500 Orange County, Florida, School Board, COP, Series A, 5.25% due 8/01/2009 (h)(i) 6,854 5,330 Orange County, Florida, Tourist Development, Tax Revenue Bonds, 5.50% due 10/01/2032 (a) 5,688 (In Thousands) Face Amount Municipal Bonds Value Florida (continued) Orlando and Orange County, Florida, Expressway Authority Revenue Bonds, Series B (a): $ 4,000 5% due 7/01/2030 $ 4,111 6,815 5% due 7/01/2035 6,996 1,530 Osceola County, Florida, Infrastructure Sales Surplus Tax Revenue Bonds, 5.25% due 10/01/2025 (a) 1,613 2,000 Osceola County, Florida, School Board, COP, Series A, 5.25% due 6/01/2027 (a) 2,101 1,100 Osceola County, Florida, Tourist Development Tax Revenue Bonds, Series A, 5.50% due 10/01/2027 (c) 1,178 1,500 Palm Beach County, Florida, Criminal Justice Facilities Revenue Bonds, 7.20% due 6/01/2015 (c) 1,838 2,000 Palm Beach County, Florida, School Board, COP, Refunding, Series D, 5.25% due 8/01/2021 (f) 2,110 5,000 Palm Beach County, Florida, School Board, COP, Series A, 6% due 8/01/2010 (c)(i) 5,477 1,000 Palm Coast, Florida, Utility System Revenue Bonds, 5% due 10/01/2027 (h) 1,028 1,500 Panama City, Florida, Water and Sewer Revenue Bonds, Series B, 5.25% due 10/01/2022 (h) 1,599 1,000 Peace River/Manasota Regional Water Supply Authority, Florida, Utility System Revenue Bonds, Series A, 5% due 10/01/2030 (f) 1,035 1,000 Pembroke Pines, Florida, Public Improvement Revenue Bonds, Series A, 5% due 10/01/2034 (a) 1,030 200 Pinellas County, Florida, Health Facilities Authority, Revenue Refunding Bonds (Pooled Hospital Loan Program), DATES, VRDN, 3.74% due 12/01/2015 (a)(n) 200 Polk County, Florida, Public Facilities Revenue Bonds (h): 1,000 5% due 12/01/2025 1,040 1,340 5% due 12/01/2033 1,383 1,000 Polk County, Florida, Utility System Revenue Bonds, 5.25% due 10/01/2022 (c) 1,063 1,055 Port St. Lucie, Florida, Utility Revenue Bonds, 5.25% due 9/01/2024 (h) 1,122 1,400 Saint Johns County, Florida, Sales Tax Revenue Bonds, Series A, 5.25% due 10/01/2031 (a) 1,479 1,000 Saint Lucie, Florida, West Services District, Utility Revenue Bonds, 5.25% due 10/01/2034 (h) 1,064 1,000 Santa Rosa County, Florida, School Board, COP, DRIVERS, Series 1293Z, 6.38% due 2/01/2014 (c)(k) 1,123 2,000 South Broward, Florida, Hospital District Revenue Bonds, DRIVERS, Series 337, 7.129% due 5/01/2032 (h)(k) 2,308 1,000 South Lake County, Florida, Hospital District Revenue Bonds (South Lake Hospital Inc.), 5.80% due 10/01/2034 1,032 1,240 Stuart, Florida, Public Utilities Revenue Refunding and Improvement Bonds, 5.25% due 10/01/2024 (c) 1,318 SEMI-ANNUAL REPORTS APRIL 30, 2006 Schedule of Investments (concluded) MuniYield Florida Insured Fund (In Thousands) Face Amount Municipal Bonds Value Florida (concluded) $ 2,280 University of Central Florida (UCF) Athletics Association Inc., COP, Series A, 5.25% due 10/01/2034 (c) $ 2,394 Village Center Community Development District, Florida, Recreational Revenue Bonds, Series A (h): 1,640 5.375% due 11/01/2034 1,761 1,000 5.125% due 11/01/2036 1,042 Village Center Community Development District, Florida, Utility Revenue Bonds (h): 2,585 5.25% due 10/01/2023 2,740 4,030 5.125% due 10/01/2028 4,191 Volusia County, Florida, IDA, Student Housing Revenue Bonds (Stetson University Project), Series A (m): 1,000 5% due 6/01/2025 1,040 1,000 5% due 6/01/2035 1,032 Maryland--0.9% 1,000 Baltimore, Maryland, Convention Center Hotel Revenue Bonds, Senior Series A, 5.25% due 9/01/2039 (o) 1,055 New Jersey--1.7% 2,000 New Jersey EDA, Cigarette Tax Revenue Bonds, 5.50% due 6/15/2024 2,071 (In Thousands) Face Amount Municipal Bonds Value Puerto Rico--6.8% $ 1,970 Puerto Rico Electric Power Authority, Power Revenue Bonds, Series II, 5.375% due 7/01/2019 (h) $ 2,122 1,000 Puerto Rico Public Buildings Authority, Government Facilities Revenue Refunding Bonds, Series I, 5% due 7/01/2036 1,007 1,145 Puerto Rico Public Finance Corporation, Commonwealth Appropriation Revenue Bonds, Series E, 5.70% due 2/01/2010 (i) 1,223 3,550 Puerto Rico Public Finance Corporation Revenue Refunding Bonds, RIB, Series 522X, 6.71% due 8/01/2022 (h)(k) 4,083 Total Municipal Bonds (Cost--$183,747)--155.2% 191,102 Shares Held Short-Term Securities 3,615 CMA Florida Municipal Money Fund 3.14% (j)(r) 3,615 Total Short-Term Securities (Cost--$3,615)--2.9% 3,615 Total Investments (Cost--$187,362*)--158.1% 194,717 Other Assets Less Liabilities--0.4% 460 Preferred Shares, at Redemption Value--(58.5%) (72,041) --------- Net Assets Applicable to Common Shares--100.0% $ 123,136 ========= * The cost and unrealized appreciation (depreciation) of investments as of April 30, 2006, as computed for federal income tax purposes, were as follows: Aggregate cost $ 187,289 =============== Gross unrealized appreciation $ 7,704 Gross unrealized depreciation (276) --------------- Net unrealized appreciation $ 7,428 =============== (a) AMBAC Insured. (b) Escrowed to maturity. (c) FGIC Insured. (d) FHLMC Collateralized. (e) FNMA Collateralized. (f) FSA Insured. (g) GNMA Collateralized. (h) MBIA Insured. (i) Prerefunded. (j) Investments in companies considered to be an affiliate of the Fund, for purposes of Section 2(a)(3) of the Investment Company Act of 1940, were as follows: Net Dividend Affiliate Activity Income Merrill Lynch Institutional Tax-Exempt Fund (2,600) --* CMA Florida Municipal Money Fund 3,615 $16 * Amount is less than $1,000. (k) The rate disclosed is that currently in effect. This rate changes periodically and inversely based upon prevailing market rates. (l) ACA Insured. (m) CIFG Insured. (n) Security may have a maturity of more than one year at time of issuance, but has variable rate and demand features that qualify it as a short-term security. The rate disclosed is that currently in effect. This rate changes periodically based upon prevailing market rates. (o) XL Capital Insured. (p) Assured Guaranty Insured. (q) Represents a zero coupon bond; the interest rate shown reflects the effective yield at the time of purchase. (r) Represents the current yield as of 4/30/2006. o Forward interest rate swaps outstanding as of April 30, 2006 were as follows: Notional Unrealized Amount Appreciation Pay a fixed rate of 3.976% and receive a floating rate based on 1-week USD Bond Market Association rate Broker, JPMorgan Chase Bank Expires May 2021 $ 5,500 $ 143 See Notes to Financial Statements. SEMI-ANNUAL REPORTS APRIL 30, 2006 Schedule of Investments MuniYield New Jersey Insured Fund, Inc. (In Thousands) Face Amount Municipal Bonds Value New Jersey--140.2% $ 1,000 Delaware River and Bay Authority Revenue Bonds, New Jersey and Delaware, 5% due 1/01/2033 (e) $ 1,027 Delaware River Joint Toll Bridge Commission, New Jersey and Pennsylvania, Bridge Revenue Refunding Bonds: 1,875 5% due 7/01/2023 1,926 1,000 5% due 7/01/2028 1,020 2,500 Delaware River Port Authority of Pennsylvania and New Jersey Revenue Bonds, RIB, Series 396, 7.903% due 1/01/2019 (d)(i) 2,857 540 Essex County, New Jersey, Improvement Authority Revenue Bonds, Series A, 5% due 10/01/2028 (c) 556 6,925 Garden State Preservation Trust of New Jersey, Capital Appreciation Revenue Bonds, Series B, 5.12% due 11/01/2023 (d)(k) 2,987 Garden State Preservation Trust of New Jersey, Open Space and Farmland Preservation Revenue Bonds, Series A (d): 2,605 5.80% due 11/01/2022 2,944 3,300 5.75% due 11/01/2028 3,864 2,000 Gloucester County, New Jersey, Improvement Authority, Solid Waste Resource Recovery, Revenue Refunding Bonds (Waste Management Inc. Project), Series A, 6.85% due 12/01/2029 2,161 1,000 Hudson County, New Jersey, COP, Refunding, 6.25% due 12/01/2016 (e) 1,158 8,250 Hudson County, New Jersey, Improvement Authority, Facility Lease Revenue Refunding Bonds (Hudson County Lease Project), 5.375% due 10/01/2024 (c) 8,594 8,080 Jackson Township, New Jersey, School District, GO, 5% due 4/15/2012 (c)(h) 8,570 3,750 Jersey City, New Jersey, Sewer Authority, Sewer Revenue Refunding Bonds, 6.25% due 1/01/2014 (a) 4,203 3,000 Middlesex County, New Jersey, COP, Refunding, 5% due 8/01/2022 (e) 3,091 Monmouth County, New Jersey, Improvement Authority, Governmental Loan Revenue Bonds (a): 735 5.20% due 12/01/2014 776 2,305 5.25% due 12/01/2015 2,439 Monmouth County, New Jersey, Improvement Authority, Governmental Loan Revenue Refunding Bonds (a): 1,695 5% due 12/01/2017 1,767 1,520 5% due 12/01/2018 1,583 1,540 5% due 12/01/2019 1,604 New Jersey EDA, Cigarette Tax Revenue Bonds: 1,060 5.625% due 6/15/2019 1,111 785 5.75% due 6/15/2029 829 225 5.50% due 6/15/2031 233 465 5.75% due 6/15/2034 489 1,000 New Jersey EDA, First Mortgage Revenue Bonds (Fellowship Village), Series C, 5.50% due 1/01/2028 1,002 (In Thousands) Face Amount Municipal Bonds Value New Jersey (continued) $ 1,700 New Jersey EDA, First Mortgage Revenue Refunding Bonds (Fellowship Village), Series A, 5.50% due 1/01/2018 $ 1,721 New Jersey EDA, Motor Vehicle Surcharge Revenue Bonds, Series A (e): 3,325 4.95% due 7/01/2021 (k) 1,617 3,900 5% due 7/01/2029 4,021 8,500 5.25% due 7/01/2033 8,997 1,765 5% due 7/01/2034 1,818 New Jersey EDA, School Facilities Construction Revenue Bonds: 3,390 Series F, 5% due 6/15/2013 (c)(h) 3,609 3,500 Series L, 5% due 3/01/2030 (d) 3,621 1,340 Series O, 5.25% due 3/01/2023 1,420 New Jersey EDA, School Facilities Construction, Revenue Refunding Bonds, Series K: 2,000 5.25% due 12/15/2016 (a) 2,162 6,500 5.25% due 12/15/2017 (c) 7,020 5,070 New Jersey EDA, Water Facilities Revenue Bonds (New Jersey--American Water Company, Inc. Project), Series A, 6.875% due 11/01/2034 (c) 5,134 New Jersey Health Care Facilities Financing Authority, Revenue Bonds: 2,100 (RWJ Healthcare Corporation), Series B, 5% due 7/01/2035 (f) 2,132 1,125 (Somerset Medical Center), 5.50% due 7/01/2033 1,142 4,000 (South Jersey Hospital), 6% due 7/01/2026 4,232 New Jersey Health Care Facilities Financing Authority, Revenue Refunding Bonds: 615 (Atlantic City Medical Center), 6.25% due 7/01/2017 677 1,315 (Atlantic City Medical Center), 5.75% due 7/01/2025 1,393 2,425 (Holy Name Hospital), 6% due 7/01/2025 2,501 2,250 (Meridian Health System Obligation Group), 5.25% due 7/01/2019 (d) 2,348 New Jersey Sports and Exposition Authority, Luxury Tax Revenue Refunding Bonds (Convention Center) (e): 2,000 5% due 9/01/2017 2,060 1,540 5.50% due 3/01/2021 1,721 1,000 5.50% due 3/01/2022 1,123 3,200 New Jersey State Educational Facilities Authority, Higher Education, Capital Improvement Revenue Bonds, Series A, 5.125% due 9/01/2022 (a) 3,357 New Jersey State Educational Facilities Authority Revenue Bonds (Rowan University), Series C (e): 1,315 5.125% due 7/01/2028 1,374 1,185 5% due 7/01/2034 1,222 New Jersey State Educational Facilities Authority, Revenue Refunding Bonds: 3,185 (Montclair State University), Series L, 5% due 7/01/2034 (e) 3,285 555 (Rowan University), Series C, 5% due 7/01/2031 (c) 569 1,725 (William Paterson University), Series E, 5% due 7/01/2021 (g) 1,788 SEMI-ANNUAL REPORTS APRIL 30, 2006 Schedule of Investments (continued) MuniYield New Jersey Insured Fund, Inc. (In Thousands) Face Amount Municipal Bonds Value New Jersey (continued) $ 3,500 New Jersey State, GO, Refunding, Series H, 5.25% due 7/01/2015 (d) $ 3,788 5,350 New Jersey State Higher Education Assistance Authority, Student Loan Revenue Bonds, AMT, Series A, 5.30% due 6/01/2017 (a) 5,392 4,425 New Jersey State Housing and Mortgage Financing Agency, Capital Fund Program Revenue Bonds, Series A, 4.70% due 11/01/2025 (d) 4,431 3,150 New Jersey State Housing and Mortgage Finance Agency, Home Buyer Revenue Bonds, AMT, Series CC, 5.80% due 10/01/2020 (e) 3,261 2,780 New Jersey State Housing and Mortgage Financing Agency, M/F Revenue Bonds, AMT, Series A, 4.90% due 11/01/2035 (c) 2,745 5,570 New Jersey State Transportation Trust Fund Authority, Transportation System Revenue Bonds, Series D, 5% due 6/15/2019 (d) 5,815 3,600 New Jersey State Transportation Trust Fund Authority, Transportation System Revenue Refunding Bonds, Series B, 5.50% due 12/15/2021 (e) 4,031 3,005 New Jersey State Turnpike Authority, Turnpike Revenue Bonds, Series B, 5.15% due 1/01/2035 (a)(k) 1,974 1,835 New Jersey State Turnpike Authority, Turnpike Revenue Refunding Bonds, Series C-1, 4.50% due 1/01/2031 (a) 1,784 1,000 Port Authority of New York and New Jersey, Consolidated Revenue Bonds, 93rd Series, 6.125% due 6/01/2094 1,166 4,075 Port Authority of New York and New Jersey, Revenue Bonds, Trust Receipts, AMT, Class R, Series 10, 7.61% due 1/15/2017 (d)(i) 4,268 3,180 Port Authority of New York and New Jersey, Revenue Refunding Bonds, DRIVERS, AMT, Series 153, 6.338% due 9/15/2012 (c)(i) 3,273 4,100 Rahway Valley Sewerage Authority, New Jersey, Sewer Revenue Bonds (Capital Appreciation), Series A, 4.74% due 9/01/2026 (e)(k) 1,501 2,200 South Jersey Port Corporation of New Jersey, Revenue Refunding Bonds, 5% due 1/01/2023 2,251 1,715 Tobacco Settlement Financing Corporation of New Jersey, Asset-Backed Revenue Bonds, 7% due 6/01/2041 1,941 (In Thousands) Face Amount Municipal Bonds Value New Jersey (concluded) Union County, New Jersey, Utilities Authority, Senior Lease Revenue Refunding Bonds (Ogden Martin System of Union, Inc.), AMT, Series A (a): $ 1,590 5.375% due 6/01/2017 $ 1,639 1,670 5.375% due 6/01/2018 1,721 University of Medicine and Dentistry, New Jersey, Revenue Bonds, Series A (a): 570 5.50% due 12/01/2018 615 1,145 5.50% due 12/01/2019 1,235 1,130 5.50% due 12/01/2020 1,219 865 5.50% due 12/01/2021 931 Puerto Rico--12.6% Puerto Rico Commonwealth Highway and Transportation Authority, Transportation Revenue Refunding Bonds: 1,500 Series J, 5% due 7/01/2029 (e) 1,553 1,380 Series K, 5% due 7/01/2045 1,377 Puerto Rico Electric Power Authority, Power Revenue Bonds: 1,830 Series HH, 5.25% due 7/01/2029 (d) 1,928 2,000 Series RR, 5% due 7/01/2028 (b) 2,070 1,500 Puerto Rico Electric Power Authority, Power Revenue Refunding Bonds, Series PP, 5% due 7/01/2025 (c) 1,560 2,110 Puerto Rico Industrial, Tourist, Educational, Medical and Environmental Control Facilities Revenue Bonds (Ascension Health), RIB, Series 377, 8.16% due 11/15/2030 (i) 2,476 5,250 Puerto Rico Public Buildings Authority Revenue Bonds, DRIVERS, Series 211, 6.807% due 7/01/2021 (e)(i) 5,596 Total Municipal Bonds (Cost--$193,378)--152.8% 200,396 Shares Held Short-Term Securities 1,144 CMA New Jersey Municipal Money Fund, 2.99% (j)(l) 1,144 Total Short-Term Securities (Cost--$1,144)--0.9% 1,144 Total Investments (Cost--$194,522*)--153.7% 201,540 Other Assets Less Liabilities--2.4% 3,138 Preferred Stock, at Redemption Value--(56.1%) (73,543) ---------- Net Assets Applicable to Common Stock--100.0% $ 131,135 ========== SEMI-ANNUAL REPORTS APRIL 30, 2006 Schedule of Investments (concluded) MuniYield New Jersey Insured Fund, Inc. (In Thousands) * The cost and unrealized appreciation (depreciation) of investments as of April 30, 2006, as computed for federal income tax purposes, were as follows: Aggregate cost $ 194,277 =============== Gross unrealized appreciation $ 7,941 Gross unrealized depreciation (678) --------------- Net unrealized appreciation $ 7,263 =============== (a) AMBAC Insured. (b) CIFG Insured. (c) FGIC Insured. (d) FSA Insured. (e) MBIA Insured. (f) Radian Insured. (g) XL Capital Insured. (h) Prerefunded. (i) The rate disclosed is that currently in effect. This rate changes periodically and inversely based upon prevailing market rates. (j) Investments in companies considered to be an affiliate of the Fund, for purposes of Section 2(a)(3) of the Investment Company Act of 1940, were as follows: Net Dividend Affiliate Activity Income CMA New Jersey Municipal Money Fund 629 $26 (k) Represents a zero coupon bond; the interest rate shown reflects the effective yield at the time of purchase. (l) Represents the current yield as of 4/30/2006. See Notes to Financial Statements. SEMI-ANNUAL REPORTS APRIL 30, 2006 Schedule of Investments MuniYield Pennsylvania Insured Fund (In Thousands) Face Amount Municipal Bonds Value Pennsylvania--140.8% $ 3,285 Abington, Pennsylvania, School District, GO, Series A, 5% due 4/01/2032 (e) $ 3,390 2,000 Allegheny County, Pennsylvania, Hospital Development Authority, Health Center Revenue Bonds (University of Pittsburgh Medical Center Health System), Series B, 6% due 7/01/2026 (f) 2,380 5,000 Allegheny County, Pennsylvania, Sanitation Authority, Sewer Revenue Refunding Bonds, Series A, 5% due 12/01/2030 (f) 5,177 4,000 Commonwealth Financing Authority, Pennsylvania, Revenue Bonds, Series A, 5% due 6/01/2025 (e) 4,171 5,500 Delaware County, Pennsylvania, IDA Revenue Bonds (Pennsylvania Suburban Water Company Project), AMT, Series A, 5.15% due 9/01/2032 (a) 5,648 4,770 Delaware County, Pennsylvania, IDA, Water Facilities Revenue Refunding Bonds (Aqua Pennsylvania Inc. Project), AMT, Series B, 5% due 11/01/2036 (c) 4,861 1,500 Delaware Valley, Pennsylvania, Regional Finance Authority, Local Government Revenue Bonds, 5.75% due 7/01/2032 1,687 5,000 Erie County, Pennsylvania, Convention Center Authority, Convention Center Hotel Revenue Bonds, 5% due 1/15/2036 (c) 5,131 7,000 Erie County, Pennsylvania, Hospital Authority Revenue Bonds (Hamot Health Foundation), 5% due 11/01/2035 (d) 7,183 4,000 Gettysburg, Pennsylvania, Municipal Authority, College Revenue Refunding Bonds, 5% due 8/15/2023 (f) 4,117 4,000 Lancaster County, Pennsylvania, Hospital Authority Revenue Bonds (Lancaster General Hospital Project), 5.50% due 3/15/2026 4,144 3,000 Lehigh County, Pennsylvania, General Purpose Authority, Hospital Revenue Refunding Bonds (Saint Lukes Hospital of Bethlehem), 5.375% due 8/15/2033 3,075 5,000 Lehigh County, Pennsylvania, IDA, PCR, Refunding (Pennsylvania Power and Light Utilities Corporation Project), Series A, 4.70% due 9/01/2029 (c) 4,919 3,500 Luzerne County, Pennsylvania, IDA, Water Facility Revenue Refunding Bonds, RIB, AMT, Series 1170, 6.10% due 9/01/2034 (a)(h) 3,650 2,675 North Allegheny, Pennsylvania, School District, GO, Series C, 5.25% due 5/01/2027 (e) 2,829 5,000 Northampton Borough, Pennsylvania, Municipal Authority, Water Revenue Bonds, 5% due 5/15/2034 (f) 5,133 (In Thousands) Face Amount Municipal Bonds Value Pennsylvania (continued) $ 6,000 Northumberland County, Pennsylvania, IDA, Water Facilities Revenue Refunding Bonds (Aqua Pennsylvania Inc. Project), AMT, 5.05% due 10/01/2039 (c) $ 6,111 3,055 Pennsbury, Pennsylvania, School District, GO, Refunding, 5.50% due 1/15/2020 (c) 3,286 1,200 Pennsylvania Economic Development Financing Authority, Solid Waste Disposal Revenue Bonds (Waste Management Inc. Project), AMT, Series A, 5.10% due 10/01/2027 1,199 2,500 Pennsylvania HFA, Revenue Bonds, DRIVERS, AMT, Series 1248Z, 6.349% due 10/01/2009 (f)(h) 2,589 2,400 Pennsylvania HFA, S/F Mortgage Revenue Refunding Bonds, AMT, Series 92-A, 4.75% due 4/01/2031 2,332 1,200 Pennsylvania State Higher Educational Facilities Authority, College and University Revenue Bonds (Ursinus College), 5% due 1/01/2036 (i) 1,220 Pennsylvania State Higher Educational Facilities Authority, Revenue Bonds: 3,000 (UPMC Health System), Series A, 6% due 1/15/2022 3,239 4,305 (York College of Pennsylvania Project), Series EE1, 5% due 11/01/2033 (g) 4,413 2,000 Pennsylvania State Higher Educational Facilities Authority, Revenue Refunding Bonds (University Properties, Inc., Student Housing Project), Series A, 5% due 8/01/2035 (d) 2,048 7,000 Pennsylvania State IDA, EDR, Refunding, 5.50% due 7/01/2020 (a) 7,572 Pennsylvania State Public School Building Authority, Revenue Bonds (Lehigh Career and Technical Institute) (c): 3,085 5.125% due 10/01/2028 3,197 2,000 5.25% due 10/01/2032 2,097 Pennsylvania State Public School Building Authority, School and Capital Appreciation Revenue Bonds (Corry Area School District) (e)(k): 1,980 4.85% due 12/15/2022 881 1,980 5.167% due 12/15/2023 839 1,980 5.489% due 12/15/2024 798 1,980 5.825% due 12/15/2025 759 Pennsylvania State Public School Building Authority, School Lease Revenue Bonds (The School District of Philadelphia Project) (e): 10,000 5.25% due 6/01/2025 10,591 10,300 5% due 6/01/2033 10,534 7,500 Pennsylvania State Public School Building Authority, School Revenue Bonds, DRIVERS, Series 371, 6.368% due 6/01/2011 (e)(h) 8,278 SEMI-ANNUAL REPORTS APRIL 30, 2006 Schedule of Investments (continued) MuniYield Pennsylvania Insured Fund (In Thousands) Face Amount Municipal Bonds Value Pennsylvania (continued) $ 7,500 Pennsylvania State Turnpike Commission, Oil Franchise Tax Revenue Bonds, DRIVERS, Series 366, 6.868% due 6/01/2011 (f)(h) $ 8,667 3,900 Pennsylvania State Turnpike Commission, Turnpike Revenue Bonds, DRIVERS, Series 460-Z, 6.868% due 6/01/2012 (a)(h) 4,572 8,000 Philadelphia, Pennsylvania, Airport Revenue Bonds, Series A, AMT, 4.75% due 6/15/2035 (f) 7,802 Philadelphia, Pennsylvania, Authority for Industrial Development, Airport Revenue Refunding Bonds (Philadelphia Airport System Project), AMT, Series A (c): 4,000 5.50% due 7/01/2017 4,231 3,655 5.50% due 7/01/2018 3,866 Philadelphia, Pennsylvania, Authority for Industrial Development, Lease Revenue Bonds: 9,125 (City of Philadelphia Project), Series A, 5.375% due 2/15/2027 (f) 9,402 3,000 Series B, 5.50% due 10/01/2020 (e) 3,226 4,680 Series B, 5.50% due 10/01/2021 (e) 5,013 10,000 Philadelphia, Pennsylvania, Gas Works Revenue Bonds, 1998 General Ordinance, 4th Series, 5% due 8/01/2032 (e) 10,225 3,000 Philadelphia, Pennsylvania, Hospitals and Higher Education Facilities Authority, Hospital Revenue Refunding Bonds (Presbyterian Medical Center), 6.65% due 12/01/2019 (b) 3,569 3,000 Philadelphia, Pennsylvania, Housing Authority Revenue Bonds (Capital Fund Program), Series A, 5.50% due 12/01/2018 (e) 3,213 4,645 Philadelphia, Pennsylvania, Qualified Redevelopment Authority Revenue Bonds, AMT, Series B, 5% due 4/15/2027 (c) 4,719 1,750 Philadelphia, Pennsylvania, Redevelopment Authority Revenue Bonds (Neighborhood Transformation), Series A, 5.50% due 4/15/2022 (c) 1,867 Philadelphia, Pennsylvania, School District, GO (c): 5,000 RIB, Series 677, 7.18% due 8/01/2021 (h) 5,965 5,000 Series D, 5.125% due 6/01/2034 5,160 4,000 Series D, 5.25% due 6/01/2034 4,201 5,890 Pittsburgh, Pennsylvania, Water and Sewer Authority, Water and Sewer System Revenue Bonds, First Lien, 5% due 9/01/2033 (f) 6,071 6,000 Reading, Pennsylvania, School District, GO, 5% due 1/15/2029 (e) 6,210 (In Thousands) Face Amount Municipal Bonds Value Pennsylvania (concluded) $ 2,600 Sayre, Pennsylvania, Health Care Facilities Authority, Revenue Refunding Bonds (Guthrie Healthcare System), Series A, 5.875% due 12/01/2031 $ 2,749 Southeastern Pennsylvania Transportation Authority, Special Revenue Bonds (c): 4,500 5.375% due 3/01/2017 4,644 2,525 5.375% due 3/01/2022 2,605 2,570 Westmoreland County, Pennsylvania, Municipal Authority, Municipal Service Revenue Bonds, 5.25% due 8/15/2028 (e) 2,725 Guam--1.4% 2,500 A.B. Won Guam International Airport Authority, General Revenue Refunding Bonds, AMT, Series C, 5% due 10/01/2023 (f) 2,547 Puerto Rico--13.7% 10,000 Puerto Rico Commonwealth, Public Improvement, GO, Series A, 5% due 7/01/2034 10,083 5,000 Puerto Rico Electric Power Authority, Power Revenue Bonds, Series RR, 5% due 7/01/2027 (g) 5,186 Puerto Rico Public Buildings Authority, Government Facilities Revenue Refunding Bonds, Series I: 2,500 5.50% due 7/01/2025 2,669 5,000 5.375% due 7/01/2034 5,249 1,000 Puerto Rico Public Finance Corporation, Commonwealth Appropriation Revenue Bonds, Series E, 5.50% due 8/01/2029 1,048 Total Municipal Bonds (Cost--$268,774)--155.9% 276,962 Shares Held Short-Term Securities 1,839 CMA Pennsylvania Municipal Money Fund, 3.10% (j)(l) 1,839 Total Short-Term Securities (Cost--$1,839)--1.0% 1,839 Total Investments (Cost--$270,613*)--156.9% 278,801 Other Assets Less Liabilities--0.5% 941 Preferred Shares, at Redemption Value--(57.4%) (102,046) ---------- Net Assets Applicable to Common Shares--100.0% $ 177,696 ========== SEMI-ANNUAL REPORTS APRIL 30, 2006 Schedule of Investments (concluded) MuniYield Pennsylvania Insured Fund (In Thousands) * The cost and unrealized appreciation (depreciation) of investments as of April 30, 2006, as computed for federal income tax purposes, were as follows: Aggregate cost $ 270,545 =============== Gross unrealized appreciation $ 9,181 Gross unrealized depreciation (925) --------------- Net unrealized appreciation $ 8,256 =============== (a) AMBAC Insured. (b) Escrowed to maturity. (c) FGIC Insured. (d) CIFG Insured. (e) FSA Insured. (f) MBIA Insured. (g) XL Capital Insured. (h) The rate disclosed is that currently in effect. This rate changes periodically and inversely based upon prevailing market rates. (i) Radian Insured. (j) Investments in companies considered to be an affiliate of the Fund, for purposes of Section 2(a)(3) of the Investment Company Act of 1940, were as follows: Net Dividend Affiliate Activity Income CMA Pennsylvania Municipal Money Fund (875) $23 (k) Represents a zero coupon bond; the interest rate shown reflects the effective yield at the time of purchase. (l) Represents the current yield as of 4/30/2006. o Forward interest rate swaps outstanding as of April 30, 2006 were as follows: Notional Unrealized Amount Depreciation Pay a fixed rate of 4.365% and receive a floating rate based on 1-week USD Bond Market Association rate Broker, JPMorgan Chase Bank Expires July 2026 $ 32,000 $ --++ ++ Amount is less than $1,000. See Notes to Financial Statements. SEMI-ANNUAL REPORTS APRIL 30, 2006 Statements of Net Assets MuniYield MuniYield MuniYield Florida New Jersey Pennsylvania Insured Insured Insured As of April 30, 2006 Fund Fund, Inc. Fund Assets Investments in unaffiliated securities, at value* $ 191,101,602 $ 200,395,597 $ 276,961,845 Investments in affiliated securities, at value** 3,614,895 1,144,545 1,838,638 Unrealized appreciation on forward interest rate swaps 143,451 -- -- Cash 29,261 95,352 24,302 Interest receivable 2,257,236 3,256,843 3,978,592 Receivable for securities sold -- -- 520,143 Prepaid expenses 5,565 5,271 6,796 --------------- --------------- --------------- Total assets 197,152,010 204,897,608 283,330,316 --------------- --------------- --------------- Liabilities Unrealized depreciation on forward interest rate swaps -- -- 224 Payable for securities purchased 1,822,400 -- 3,318,678 Dividends payable to Common Stock/Shareholders 31,902 103,372 104,722 Payable to investment adviser 74,182 78,018 106,278 Payable to other affiliates 1,344 2,509 3,418 Accrued expenses 44,450 36,087 54,722 --------------- --------------- --------------- Total liabilities 1,974,278 219,986 3,588,042 --------------- --------------- --------------- Preferred Stock/Shares Preferred Stock/Shares, at redemption value, of AMPS+++ at $25,000 per share liquidation preference++*** 72,041,293 73,542,768 102,045,880 --------------- --------------- --------------- Net Assets Applicable to Common Stock/Shares Net assets applicable to Common Stock/Shares $ 123,136,439 $ 131,134,854 $ 177,696,394 =============== =============== =============== Analysis of Net Assets Applicable to Common Stock/Shares Undistributed investment income--net $ 894,415 $ 1,204,259 $ 735,562 Accumulated realized capital losses--net (3,677,135) (1,224,072) (2,308,158) Unrealized appreciation--net 7,497,570 7,017,893 8,187,131 --------------- --------------- --------------- Total accumulated earnings--net 4,714,850 6,998,080 6,614,535 --------------- --------------- --------------- Common Stock/Shares, par value $.10 per share++++ 845,181 880,210 1,148,057 Paid-in capital in excess of par 117,576,408 123,256,564 169,933,802 --------------- --------------- --------------- Net Assets $ 123,136,439 $ 131,134,854 $ 177,696,394 =============== =============== =============== Net asset value per share of Common Stock/Shares $ 14.57 $ 14.90 $ 15.48 =============== =============== =============== Market Price $ 13.77 $ 14.70 $ 14.73 =============== =============== =============== * Identified cost on unaffiliated securities $ 183,747,483 $ 193,377,704 $ 268,774,490 =============== =============== =============== ** Identified cost on affiliated securities $ 3,614,895 $ 1,144,545 $ 1,838,638 =============== =============== =============== *** Preferred Stock/Shares issued and outstanding: Series A, par value of $.05 per share 2,400 2,240 1,600 =============== =============== =============== Series B, par value of $.05 per share 480 -- 1,920 =============== =============== =============== Series B, par value of $.10 per share -- 700 -- =============== =============== =============== Series C, par value of $.05 per share -- -- 560 =============== =============== =============== ++ Preferred Stock/Shares authorized 1,000,000 2,940 1,000,000 =============== =============== =============== ++++ Common Stock/Shares issued and outstanding 8,451,814 8,802,099 11,480,567 =============== =============== =============== +++ Auction Market Preferred Stock/Shares. See Notes to Financial Statements. SEMI-ANNUAL REPORTS APRIL 30, 2006 Statements of Operations MuniYield MuniYield MuniYield Florida New Jersey Pennsylvania Insured Insured Insured For the Six Months Ended April 30, 2006 Fund Fund, Inc. Fund Investment Income Interest $ 4,789,164 $ 5,089,373 $ 6,760,504 Dividends from affiliates 15,505 26,381 23,325 --------------- --------------- --------------- Total income 4,804,669 5,115,754 6,783,829 --------------- --------------- --------------- Expenses Investment advisory fees 487,388 512,332 698,395 Commission fees 95,668 93,761 133,015 Accounting services 43,942 44,289 54,794 Transfer agent fees 20,963 26,832 33,695 Professional fees 26,948 26,675 29,010 Printing and shareholder reports 10,710 10,364 14,028 Directors'/Trustees' fees and expenses 13,865 13,532 13,771 Listing fees 8,561 8,394 8,453 Pricing fees 7,505 6,807 5,695 Custodian fees 7,058 6,696 8,706 Other 20,738 21,528 25,664 --------------- --------------- --------------- Total expenses before reimbursement 743,346 771,210 1,025,226 Reimbursement of expenses (3,006) (4,903) (4,821) --------------- --------------- --------------- Total expenses after reimbursement 740,340 766,307 1,020,405 --------------- --------------- --------------- Investment income--net 4,064,329 4,349,447 5,763,424 --------------- --------------- --------------- Realized and Unrealized Gain (Loss)--Net Realized gain (loss) on: Investments--net (350,153) 337,858 407,897 Forward interest rate swaps--net (213,955) 71,694 1,224,073 --------------- --------------- --------------- Total realized gain (loss) (564,108) 409,552 1,631,970 --------------- --------------- --------------- Change in unrealized appreciation/depreciation on: Investments--net (496,567) (1,938,447) (1,489,390) Forward interest rate swaps--net (10,701) (46,507) (770,676) --------------- --------------- --------------- Total change in unrealized appreciation/depreciation (507,268) (1,984,954) (2,260,066) --------------- --------------- --------------- Total realized and unrealized loss--net (1,071,376) (1,575,402) (628,096) --------------- --------------- --------------- Dividends to Preferred Stock/Shareholders Investment income--net (1,060,348) (987,285) (1,439,448) --------------- --------------- --------------- Net Increase in Net Assets Resulting from Operations $ 1,932,605 $ 1,786,760 $ 3,695,880 =============== =============== =============== See Notes to Financial Statements. SEMI-ANNUAL REPORTS APRIL 30, 2006 Statements of Changes in Net Assets MuniYield Florida Insured Fund For the Six For the Months Ended Year Ended April 30, October 31, Increase (Decrease) in Net Assets: 2006 2005 Operations Investment income--net $ 4,064,329 $ 8,290,264 Realized gain (loss)--net (564,108) 1,562,411 Change in unrealized appreciation--net (507,268) (4,777,919) Dividends to Preferred Shareholders (1,060,348) (1,442,962) --------------- --------------- Net increase in net assets resulting from operations 1,932,605 3,631,794 --------------- --------------- Dividends to Common Shareholders Investment income--net (3,245,367) (7,564,939) --------------- --------------- Net decrease in net assets resulting from dividends to Common Shareholders (3,245,367) (7,564,939) --------------- --------------- Share Transactions Value of shares issued to Common Shareholders in reinvestment of dividends 27,237 144,662 Offering and underwriting costs resulting from the issuance of Preferred Shares -- (244,177) --------------- --------------- Net increase (decrease) in net assets derived from share transactions 27,237 (99,515) --------------- --------------- Net Assets Applicable to Common Shares Total decrease in net assets applicable to Common Shares (1,285,525) (4,032,660) Beginning of period 124,421,964 128,454,624 --------------- --------------- End of period* $ 123,136,439 $ 124,421,964 =============== =============== * Undistributed investment income--net $ 894,415 $ 1,135,801 =============== =============== See Notes to Financial Statements. SEMI-ANNUAL REPORTS APRIL 30, 2006 Statements of Changes in Net Assets MuniYield New Jersey Insured Fund, Inc. For the Six For the Months Ended Year Ended April 30, October 31, Increase (Decrease) in Net Assets: 2006 2005 Operations Investment income--net $ 4,349,447 $ 8,428,036 Realized gain--net 409,552 2,729,125 Change in unrealized appreciation/depreciation--net (1,984,954) (5,148,576) Dividends to Preferred Stock shareholders (987,285) (1,395,905) --------------- --------------- Net increase in net assets resulting from operations 1,786,760 4,612,680 --------------- --------------- Dividends to Common Stock Shareholders Investment income--net (3,274,381) (8,036,760) --------------- --------------- Net decrease in net assets resulting from dividends to Common Stock shareholders (3,274,381) (8,036,760) --------------- --------------- Stock Transactions Value of shares issued to Common Stock shareholders in reinvestment of dividends -- 675,155 Adjustment of offering costs resulting from the issuance of Preferred Stock -- 1,285 --------------- --------------- Net increase in net assets derived from stock transactions -- 676,440 --------------- --------------- Net Assets Applicable to Common Stock Total decrease in net assets applicable to Common Stock (1,487,621) (2,747,640) Beginning of period 132,622,475 135,370,115 --------------- --------------- End of period* $ 131,134,854 $ 132,622,475 =============== =============== * Undistributed investment income--net $ 1,204,259 $ 1,116,478 =============== =============== See Notes to Financial Statements. SEMI-ANNUAL REPORTS APRIL 30, 2006 Statements of Changes in Net Assets MuniYield Pennsylvania Insured Fund For the Six For the Months Ended Year Ended April 30, October 31, Increase (Decrease) in Net Assets: 2006 2005 Operations Investment income--net $ 5,763,424 $ 12,056,700 Realized gain--net 1,631,970 4,069,175 Change in unrealized appreciation/depreciation--net (2,260,066) (8,120,716) Dividends to Preferred Shareholders (1,439,448) (2,146,454) --------------- --------------- Net increase in net assets resulting from operations 3,695,880 5,858,705 --------------- --------------- Dividends to Common Shareholders Investment income--net (4,752,955) (10,967,433) --------------- --------------- Net decrease in net assets resulting from dividends to Common Shareholders (4,752,955) (10,967,433) --------------- --------------- Share Transactions Value of shares issued to Common Shareholders in reinvestment of dividends -- 269,585 Offering and underwriting costs resulting from the issuance of Preferred Shares -- (266,553) Adjustment to offering costs resulting from the issuance of Preferred Shares (17,729) -- --------------- --------------- Net increase (decrease) in net assets derived from share transactions (17,729) 3,032 --------------- --------------- Net Assets Applicable to Common Shares Total decrease in net assets applicable to Common Shares (1,074,804) (5,105,696) Beginning of period 178,771,198 183,876,894 --------------- --------------- End of period* $ 177,696,394 $ 178,771,198 =============== =============== * Undistributed investment income--net $ 735,562 $ 1,164,541 =============== =============== See Notes to Financial Statements. SEMI-ANNUAL REPORTS APRIL 30, 2006 Financial Highlights MuniYield Florida Insured Fund For the Six Months Ended The following per share data and ratios have been derived April 30, For the Year Ended October 31, from information provided in the financial statements. 2006 2005 2004 2003 2002 Per Share Operating Performance Net asset value, beginning of period $ 14.72 $ 15.22 $ 15.04 $ 15.04 $ 14.94 ----------- ---------- ---------- ---------- ---------- Investment income--net .48+++ .98+++ .98+++ 1.05+++ 1.04 Realized and unrealized gain (loss)--net (.12) (.38) .20 (.06) .06 Less dividends and distributions to Preferred Shareholders: Investment income--net (.13) (.17) (.07) (.07) (.10) Realized gain--net -- -- -- -- --++ ----------- ---------- ---------- ---------- ---------- Total from investment operations .23 .43 1.11 .92 1.00 ----------- ---------- ---------- ---------- ---------- Less dividends and distributions to Common Shareholders: Investment income--net (.38) (.90) (.93) (.92) (.90) Realized gain--net -- -- -- -- --++ ----------- ---------- ---------- ---------- ---------- Total dividends and distributions to Common Shareholders (.38) (.90) (.93) (.92) (.90) ----------- ---------- ---------- ---------- ---------- Offering and underwriting costs resulting from the issuance of Preferred Shares -- (.03) -- -- -- ----------- ---------- ---------- ---------- ---------- Net asset value, end of period $ 14.57 $ 14.72 $ 15.22 $ 15.04 $ 15.04 =========== ========== ========== ========== ========== Market price per share, end of period $ 13.77 $ 14.18 $ 14.98 $ 14.18 $ 14.30 =========== ========== ========== ========== ========== Total Investment Return** Based on net asset value per share 1.70%+++++ 2.72% 7.98% 6.45% 7.22% =========== ========== ========== ========== ========== Based on market price per share (.23%)+++++ .54% 12.73% 5.56% 7.19% =========== ========== ========== ========== ========== Ratios Based on Average Net Assets of Common Shares Total expenses, net of reimbursement*** 1.20%* 1.20% 1.09% 1.08% 1.11% =========== ========== ========== ========== ========== Total expenses*** 1.20%* 1.20% 1.10% 1.08% 1.11% =========== ========== ========== ========== ========== Total investment income--net*** 6.58%* 6.50% 6.54% 6.86% 7.02% =========== ========== ========== ========== ========== Amount of dividends to Preferred Shareholders 1.72%* 1.13% .48% .47% .67% =========== ========== ========== ========== ========== Investment income--net, to Common Shareholders 4.86%* 5.37% 6.06% 6.39% 6.35% =========== ========== ========== ========== ========== Ratios Based on Average Net Assets of Preferred Shares Dividends to Preferred Shareholders 2.97%* 2.02% 1.02% 1.00% 1.39% =========== ========== ========== ========== ========== SEMI-ANNUAL REPORTS APRIL 30, 2006 Financial Highlights (concluded) MuniYield Florida Insured Fund For the Six Months Ended The following per share data and ratios have been derived April 30, For the Year Ended October 31, from information provided in the financial statements. 2006 2005 2004 2003 2002 Supplemental Data Net assets applicable to Common Shares, end of period (in thousands) $ 123,136 $ 124,422 $ 128,455 $ 126,915 $ 126,947 =========== ========== ========== ========== ========== Preferred Shares outstanding, end of period (in thousands) $ 72,000 $ 72,000 $ 60,000 $ 60,000 $ 60,000 =========== ========== ========== ========== ========== Portfolio turnover 24.81% 51.33% 31.22% 47.21% 40.55% =========== ========== ========== ========== ========== Leverage Asset coverage per $1,000 $ 2,710 $ 2,728 $ 3,141 $ 3,115 $ 3,116 =========== ========== ========== ========== ========== Dividends Per Share on Preferred Shares Outstanding Series A--Investment income--net $ 366 $ 505 $ 255 $ 251 $ 348 =========== ========== ========== ========== ========== Series B++++--Investment income--net $ 377 $ 482 -- -- -- =========== ========== ========== ========== ========== * Annualized. ** Total investment returns based on market value, which can be significantly greater or lesser than the net asset value, may result in substantially different returns. Total investment returns exclude the effects of sales charges. *** Does not reflect the effect of dividends to Preferred Shareholders. ++ Amount is less than $(.01) per share. ++++ Series B was issued on November 22, 2004. +++ Based on average shares outstanding. +++++ Aggregate total investment return. See Notes to Financial Statements. SEMI-ANNUAL REPORTS APRIL 30, 2006 Financial Highlights MuniYield New Jersey Insured Fund, Inc. For the Six Months Ended The following per share data and ratios have been derived April 30, For the Year Ended October 31, from information provided in the financial statements. 2006 2005 2004 2003 2002 Per Share Operating Performance Net asset value, beginning of period $ 15.07 $ 15.46 $ 15.25 $ 15.14 $ 15.17 ---------- ---------- ---------- ---------- ---------- Investment income--net .49+++ .96+++ 1.03+++ 1.06+++ 1.07 Realized and unrealized gain (loss)--net (.18) (.27) .21 .06 (.06) Less dividends and distributions to Preferred Stock shareholders: Investment income--net (.11) (.16) (.06) (.06) (.09) Realized gain--net -- -- -- --++ --++ ---------- ---------- ---------- ---------- ---------- Total from investment operations .20 .53 1.18 1.06 .92 ---------- ---------- ---------- ---------- ---------- Less dividends and distributions to Common Stock shareholders: Investment income--net (.37) (.92) (.94) (.94) (.94) Realized gain--net -- -- -- (.01) (.01) ---------- ---------- ---------- ---------- ---------- Total dividends and distributions to Common Stock shareholders (.37) (.92) (.94) (.95) (.95) ---------- ---------- ---------- ---------- ---------- Offering and underwriting costs resulting from the issuance of Preferred Stock -- -- (.03) -- -- ---------- ---------- ---------- ---------- ---------- Adjustment of offering costs resulting from the issuance of Preferred Stock -- --++++++ -- -- -- ---------- ---------- ---------- ---------- ---------- Net asset value, end of period $ 14.90 $ 15.07 $ 15.46 $ 15.25 $ 15.14 ========== ========== ========== ========== ========== Market price per share, end of period $ 14.70 $ 14.65 $ 15.16 $ 14.39 $ 14.45 ========== ========== ========== ========== ========== Total Investment Return** Based on net asset value per share 1.39%+++++ 3.49% 7.99% 7.24% 6.27% ========== ========== ========== ========== ========== Based on market price per share 2.89%+++++ 2.60% 12.23% 6.02% 2.30% ========== ========== ========== ========== ========== Ratios Based on Average Net Assets of Common Stock Total expenses, net of reimbursement*** 1.16%* 1.16% 1.06% 1.03% 1.07% ========== ========== ========== ========== ========== Total expenses*** 1.17%* 1.16% 1.07% 1.04% 1.07% ========== ========== ========== ========== ========== Total investment income--net*** 6.59%* 6.21% 6.79% 6.89% 7.04% ========== ========== ========== ========== ========== Amount of dividends to Preferred Stock shareholders 1.50%* 1.03% .42% .38% .57% ========== ========== ========== ========== ========== Investment income--net, to Common Stock shareholders 5.09%* 5.18% 6.37% 6.51% 6.47% ========== ========== ========== ========== ========== Ratios Based on Average Net Assets of Preferred Stock Dividends to Preferred Stock shareholders 2.71%* 1.90% .95% .91% 1.32% ========== ========== ========== ========== ========== SEMI-ANNUAL REPORTS APRIL 30, 2006 Financial Highlights (concluded) MuniYield New Jersey Insured Fund, Inc. For the Six Months Ended The following per share data and ratios have been derived April 30, For the Year Ended October 31, from information provided in the financial statements. 2006 2005 2004 2003 2002 Supplemental Data Net assets applicable to Common Stock, end of period (in thousands) $ 131,135 $ 132,622 $ 135,370 $ 133,240 $ 132,146 ========== ========== ========== ========== ========== Preferred Stock outstanding, end of period (in thousands) $ 73,500 $ 73,500 $ 73,500 $ 56,000 $ 56,000 ========== ========== ========== ========== ========== Portfolio turnover 2.96% 37.31% 18.25% 24.70% 28.45% ========== ========== ========== ========== ========== Leverage Asset coverage per $1,000 $ 2,784 $ 2,804 $ 2,842 $ 3,379 $ 3,360 ========== ========== ========== ========== ========== Dividends Per Share on Preferred Stock Outstanding Series A--Investment income--net $ 335 $ 492 $ 232 $ 228 $ 330 ========== ========== ========== ========== ========== Series B++++--Investment income--net $ 338 $ 420 $ 57 -- -- ========== ========== ========== ========== ========== * Annualized. ** Total investment returns based on market value, which can be significantly greater or lesser than the net asset value, may result in substantially different returns. Total investment returns exclude the effects of sales charges. *** Does not reflect the effect of dividends to Preferred Stock shareholders. ++ Amount is less than $(.01) per share. ++++ Series B was issued on August 25, 2004. ++++++ Amount is less than $.01 per share. +++ Based on average shares outstanding. +++++ Aggregate total investment return. See Notes to Financial Statements. SEMI-ANNUAL REPORTS APRIL 30, 2006 Financial Highlights MuniYield Pennsylvania Insured Fund For the Six Months Ended The following per share data and ratios have been derived April 30, For the Year Ended October 31, from information provided in the financial statements. 2006 2005 2004 2003 2002 Per Share Operating Performance Net asset value, beginning of period $ 15.57 $ 16.04 $ 15.56 $ 15.34 $ 15.19 ---------- ---------- ---------- ---------- ---------- Investment income--net .50+++ 1.05+++ 1.08+++ 1.11+++ 1.11 Realized and unrealized gain (loss)--net (.06) (.35) .48 .16 .13 Dividends to Preferred Shareholders from investment income--net (.13) (.19) (.08) (.07) (.11) ---------- ---------- ---------- ---------- ---------- Total from investment operations .31 .51 1.48 1.20 1.13 ---------- ---------- ---------- ---------- ---------- Less dividends to Common Shareholders from investment income--net (.40) (.96) (1.00) (.98) (.98) ---------- ---------- ---------- ---------- ---------- Total dividends to Common Shareholders (.40) (.96) (1.00) (.98) (.98) ---------- ---------- ---------- ---------- ---------- Offering and underwriting costs resulting from the issuance of Preferred Shares -- (.02) -- -- -- ---------- ---------- ---------- ---------- ---------- Adjustment to offering costs resulting from the issuance of Preferred Shares --++++ -- -- -- -- ---------- ---------- ---------- ---------- ---------- Net asset value, end of period $ 15.48 $ 15.57 $ 16.04 $ 15.56 $ 15.34 ========== ========== ========== ========== ========== Market price per share, end of period $ 14.73 $ 14.91 $ 15.61 $ 14.81 $ 14.37 ========== ========== ========== ========== ========== Total Investment Return** Based on net asset value per share 2.13%+++++ 3.16% 10.15% 8.33% 7.84% ========== ========== ========== ========== ========== Based on market price per share 1.48%+++++ 1.51% 12.63% 10.07% 2.57% ========== ========== ========== ========== ========== Ratios Based on Average Net Assets of Common Shares Total expenses, net of reimbursement*** 1.15%* 1.13% 1.05% 1.07% 1.12% ========== ========== ========== ========== ========== Total expenses*** 1.15%* 1.14% 1.07% 1.08% 1.12% ========== ========== ========== ========== ========== Total investment income--net*** 6.47%* 6.56% 6.89% 7.08% 7.30% ========== ========== ========== ========== ========== Amount of dividends to Preferred Shareholders 1.62%* 1.17% .51% .47% .70% ========== ========== ========== ========== ========== Investment income--net, to Common Shareholders 4.85%* 5.39% 6.38% 6.61% 6.60% ========== ========== ========== ========== ========== Ratios Based on Average Net Assets of Preferred Shares Dividends to Preferred Shareholders 2.85%* 2.12% 1.04% .95% 1.37% ========== ========== ========== ========== ========== SEMI-ANNUAL REPORTS APRIL 30, 2006 Financial Highlights (concluded) MuniYield Pennsylvania Insured Fund For the Six Months Ended The following per share data and ratios have been derived April 30, For the Year Ended October 31, from information provided in the financial statements. 2006 2005 2004 2003 2002 Supplemental Data Net assets applicable to Common Shares, end of period (in thousands) $ 177,696 $ 178,771 $ 183,877 $ 178,337 $ 175,720 ========== ========== ========== ========== ========== Preferred Shares outstanding, end of period (in thousands) $ 102,000 $ 102,000 $ 88,000 $ 88,000 $ 88,000 ========== ========== ========== ========== ========== Portfolio turnover 16.51% 46.42% 50.00% 55.57% 51.37% ========== ========== ========== ========== ========== Leverage Asset coverage per $1,000 $ 2,742 $ 2,753 $ 3,090 $ 3,027 $ 2,997 ========== ========== ========== ========== ========== Dividends Per Share on Preferred Shares Outstanding Series A--Investment income--net $ 356 $ 531 $ 254 $ 242 $ 338 ========== ========== ========== ========== ========== Series B--Investment income--net $ 348 $ 530 $ 261 $ 235 $ 346 ========== ========== ========== ========== ========== Series C++--Investment income--net $ 360 $ 501 -- -- -- ========== ========== ========== ========== ========== * Annualized. ** Total investment returns based on market value, which can be significantly greater or lesser than the net asset value, may result in substantially different returns. Total investment returns exclude the effects of sales charges. *** Does not reflect the effect of dividends to Preferred Shareholders. ++ Series C was issued on November 22, 2004. ++++ Amount is less than $(.01) per share. +++ Based on average shares outstanding. +++++ Aggregate total investment return. See Notes to Financial Statements. SEMI-ANNUAL REPORTS APRIL 30, 2006 Notes to Financial Statements 1. Significant Accounting Policies: MuniYield Florida Insured Fund, MuniYield New Jersey Insured Fund, Inc. and MuniYield Pennsylvania Insured Fund (the "Funds" or individually as the "Fund") are registered under the Investment Company Act of 1940, as amended, as non-diversified, closed-end management investment companies. The Funds' financial statements are prepared in conformity with U.S. generally accepted accounting principles, which may require the use of management accruals and estimates. Actual results may differ from these estimates. These unaudited financial statements reflect all adjustments which are, in the opinion of management, necessary to present a fair statement of the results for the interim period. All such adjustments are of a normal, recurring nature. The Funds determine and make available for publication the net asset value of their Common Stock/Shares on a daily basis. The Fund's Common Stock/Shares are listed on the New York Stock Exchange under the symbol MFT for MuniYield Florida Insured Fund, MJI for MuniYield New Jersey Insured Fund, Inc., and MPA for MuniYield Pennsylvania Insured Fund. The following is a summary of significant accounting policies followed by the Funds. (a) Valuation of investments--Municipal bonds are traded primarily in the over- the-counter ("OTC") markets and are valued at the last available bid price in the OTC markets or on the basis of values as obtained by a pricing service. Pricing services use valuation matrixes that incorporate both dealer-supplied valuations and valuation models. The procedures of the pricing service and its valuations are reviewed by the officers of the Funds under the general direction of the Board of Directors/Trustees. Such valuations and procedures are reviewed periodically by the Board of Directors/Trustees of the Funds. Financial futures contracts and options thereon, which are traded on exchanges, are valued at their closing prices as of the close of such exchanges. Options written or purchased are valued at the last sale price in the case of exchange-traded options. In the case of options traded in the OTC market, valuation is the last asked price (options written) or the last bid price (options purchased). Swap agreements are valued by quoted fair values received daily by the Funds' pricing service. Short-term investments with a remaining maturity of 60 days or less are valued at amortized cost, which approximates market value, under which method the investment is valued at cost and any premium or discount is amortized on a straight line basis to maturity. Investments in open-end investment companies are valued at their net asset value each business day. Securities and other assets for which market quotations are not readily available are valued at fair value as determined in good faith by or under the direction of the Board of Directors/Trustees of the Funds. (b) Derivative financial instruments--Each Fund may engage in various portfolio investment strategies both to increase the return of the Fund and to hedge, or protect, its exposure to interest rate movements and movements in the securities markets. Losses may arise due to changes in the value of the contract or if the counterparty does not perform under the contract. * Financial futures contracts--Each Fund may purchase or sell financial futures contracts and options on such futures contracts. Futures contracts are contracts for delayed delivery of securities at a specific future date and at a specific price or yield. Upon entering into a contract, the Fund deposits and maintains as collateral such initial margin as required by the exchange on which the transaction is effected. Pursuant to the contract, the Fund agrees to receive from or pay to the broker an amount of cash equal to the daily fluctuation in value of the contract. Such receipts or payments are known as variation margin and are recorded by the Fund as unrealized gains or losses. When the contract is closed, the Fund records a realized gain or loss equal to the difference between the value of the contract at the time it was opened and the value at the time it was closed. * Options--Each Fund may purchase and write call and put options. When the Fund writes an option, an amount equal to the premium received by the Fund is reflected as an asset and an equivalent liability. The amount of the liability is subsequently marked-to-market to reflect the current market value of the option written. When a security is purchased or sold through an exercise of an option, the related premium paid (or received) is added to (or deducted from) the basis of the security acquired or deducted from (or added to) the proceeds of the security sold. When an option expires (or the Fund enters into a closing transaction), the Fund realizes a gain or loss on the option to the extent of the premiums received or paid (or gain or loss to the extent the cost of the closing transaction exceeds the premium paid or received). SEMI-ANNUAL REPORTS APRIL 30, 2006 Notes to Financial Statements (continued) Written and purchased options are non-income producing investments. * Forward interest rate swaps--Each Fund may enter into forward interest rate swaps. In a forward interest rate swap, the Fund and the counterparty agree to make periodic net payments on a specified notional contract amount, commencing on a specified future effective date, unless terminated earlier. When the agreement is closed, the Fund records a realized gain or loss in an amount equal to the value of the agreement. (c) Income taxes--It is each Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute substantially all of its taxable income to its shareholders. Therefore, no federal income tax provision is required. (d) Security transactions and investment income--Security transactions are recorded on the dates the transactions are entered into (the trade dates). Realized gains and losses on security transactions are determined on the identified cost basis. Dividend income is recorded on the ex-dividend dates. Interest income is recognized on the accrual basis. The Funds amortize all premiums and discounts on debt securities. (e) Dividends and distributions--Dividends from net investment income are declared and paid monthly. Distributions of capital gains are recorded on the ex-dividend dates. (f) Offering expenses--Direct expenses relating to the public offering of certain Fund's Preferred Stock/Shares were charged to capital. Any adjustments to estimates of offering costs were recorded back to capital. 2. Investment Advisory Agreement and Transactions with Affiliates: Each Fund has entered into an Investment Advisory Agreement with Fund Asset Management, L.P. ("FAM"). The general partner of FAM is Princeton Services, Inc. ("PSI"), an indirect, wholly-owned subsidiary of Merrill Lynch & Co., Inc. ("ML & Co."), which is the limited partner. FAM is responsible for the management of each Fund's portfolio and provides the necessary personnel, facilities, equipment and certain other services necessary to the operations of the Fund. For such services, each Fund pays a monthly fee at an annual rate of .50% of the Fund's average weekly net assets, including proceeds from the issuance of Preferred Stock/Shares. For the six months ended April 30, 2006, the Investment Adviser agreed to reimburse its management fee by the amount of management fees each Fund pays to FAM indirectly through its investment(s) described below: Reimbursement For the Six Months Ended Investment(s) April 30, 2006 MuniYield Florida Merrill Lynch Insured Fund Institutional Exempt/ CMA Florida Municipal Money Fund $3,006 MuniYield New Jersey CMA New Jersey Insured Fund, Inc. Municipal Money Fund $4,903 MuniYield Pennsylvania CMA Pennsylvania Insured Fund Municipal Money Fund $4,821 For the six months ended April 30, 2006, the Funds reimbursed FAM for certain accounting services. Each Fund's reimbursements were as follows: Reimbursement MuniYield Florida Insured Fund $2,142 MuniYield New Jersey Insured Fund, Inc. $2,283 MuniYield Pennsylvania Insured Fund $3,032 Certain officers and/or directors/trustees of the Funds are officers and/or directors of FAM, PSI, and/or ML & Co. In February 2006, ML & Co. and BlackRock, Inc. entered into an agreement to contribute ML & Co.'s investment management business, including FAM, to the investment management business of BlackRock, Inc. The transaction is expected to close in the third quarter of 2006. 3. Investments: Purchases and sales of investments, excluding short-term securities, for the six months ended April 30, 2006 were as follows: MuniYield MuniYield MuniYield Florida New Jersey Pennsylvania Insured Insured Insured Fund Fund, Inc. Fund Total Purchases $47,843,969 $ 6,033,265 $52,331,031 Total Sales $49,630,943 $11,779,501 $45,690,857 SEMI-ANNUAL REPORTS APRIL 30, 2006 Notes to Financial Statements (continued) 4. Stock/Share Transactions: MuniYield Florida Insured Fund and MuniYield Pennsylvania Insured Fund are authorized to issue an unlimited number of Common Shares of beneficial interest, par value $.10 per share together with 1,000,000 Preferred Shares of beneficial interest, par value of $.05 per share. The Board of Trustees is authorized, however, to reclassify any unissued shares of beneficial interest without approval of the holders of Common Shares. MuniYield New Jersey Insured Fund, Inc. is authorized to issue 200,000,000 shares of stock, including Preferred Stock, par value $.10 per share, all of which were initially classified as Common Stock. The Board of Directors is authorized, however, to classify any unissued shares of stock without approval of holders of Common Stock. Common Stock/Shares MuniYield Florida Insured Fund Shares issued and outstanding during the six months ended April 30, 2006 and during the year ended October 31, 2005 increased by 1,851 and 9,507, respectively, as a result of dividend reinvestment. MuniYield New Jersey Insured Fund, Inc. Shares issued and outstanding during the six months ended April 30, 2006 remained constant. Shares issued and outstanding during the year October 31, 2005 increased by 43,611 as a result of dividend reinvestment. MuniYield Pennsylvania Insured Fund Shares issued and outstanding during the six months ended April 30, 2006 remained constant. Shares issued and outstanding during the year ended October 31, 2005 increased by 16,822 as a result of dividend reinvestment. Preferred Stock/Shares Auction Market Preferred Stock/Shares are redeemable Preferred Stock/Shares of the Funds, with a liquidation preference of $25,000 per share plus accrued and unpaid dividends that entitle their holders to receive cash dividends at an annual rate that may vary for the successive dividend periods. MuniYield Florida Insured Fund and MuniYield Pennsylvania Insured Fund have a par value of $.05 per share. MuniYield New Jersey Insured Fund, Inc. has a par value of $.05 per share for Series A Shares and $.10 per share for Series B Shares. The yields in effect at April 30, 2006 were as follows: MuniYield MuniYield MuniYield Florida New Jersey Pennsylvania Insured Insured Insured Fund Fund, Inc. Fund Series A 3.70% 3.50% 2.82% Series B 3.65% 3.60% 3.65% Series C -- -- 2.90% MuniYield Florida Insured Fund Shares issued and outstanding during the six months ended April 30, 2006 remained constant. Shares issued and outstanding during the year ended October 31, 2005 increased by 480 shares from the issuance of an additional series of Preferred Shares. MuniYield New Jersey Insured Fund, Inc. Shares issued and outstanding during the six months ended April 30, 2006 and the year ended October 31, 2005 remained constant. MuniYield Pennsylvania Insured Fund Shares issued and outstanding during the six months ended April 30, 2006 remained constant. Shares issued and outstanding during the year ended October 31, 2005 increased by 560 shares from the issuance of an additional series of Preferred Shares. The Funds pay commissions to certain broker-dealers at the end of each auction at an annual rate ranging from .25% to .375%, calculated on the proceeds of each auction. For the six months ended April 30, 2006, MLPF&S earned commissions as follows: Commissions MuniYield Florida Insured Fund $ 54,036 MuniYield New Jersey Insured Fund, Inc. $ 55,315 MuniYield Pennsylvania Insured Fund $ 77,601 SEMI-ANNUAL REPORTS APRIL 30, 2006 Notes to Financial Statements (concluded) 5. Capital Loss Carryforward: MuniYield Florida Insured Fund On October 31, 2005, the Fund had a net capital loss carryforward of $2,775,558, of which $693,833 expires in 2008 and $2,081,725 expires in 2012. These amounts will be available to offset like amounts of any future taxable gains. MuniYield New Jersey Insured Fund, Inc. On October 31, 2005, the Fund had a net capital loss carryforward of $667,579, all of which expires in 2012. This amount will be available to offset like amounts of any future taxable gains. MuniYield Pennsylvania Insured Fund On October 31, 2005, the Fund had a net capital loss carryforward of $3,277,078, all of which expires in 2008. This amount will be available to offset like amounts of any future taxable gains. 6. Subsequent Event Each Fund paid a tax-exempt income dividend to holders of Common Stock/Shares on May 30, 2006 to stock/shareholders of record on May 15, 2006. The amount of the tax-exempt income dividends were as follows: Per Share Amount MuniYield Florida Insured Fund $.061000 MuniYield New Jersey Insured Fund, Inc. $.059000 MuniYield Pennsylvania Insured Fund $.063000 SEMI-ANNUAL REPORTS APRIL 30, 2006 Proxy Results MuniYield Florida Insured Fund During the six-month period ended April 30, 2006, MuniYield Florida Insured Fund's Common Shareholders voted on the following proposal. The proposal was approved at a shareholders' meeting on April 27, 2006. A description of the proposal and number of shares voted are as follows: Shares Voted Shares Withheld For From Voting 1. To elect the Fund's Trustees: Robert C. Doll, Jr. 7,895,655 133,742 Donald W. Burton 7,897,374 132,023 John F. O'Brien 7,894,071 135,326 David H. Walsh 7,894,071 135,326 During the six-month period ended April 30, 2006, MuniYield Florida Insured Fund's Preferred Shareholders (Series A--B) voted on the following proposal. The proposal was approved at a shareholders' meeting on April 27, 2006. A description of the proposals and number of shares voted are as follows: Shares Voted Shares Withheld For From Voting 1. To elect the Fund's Board of Trustees: Robert C. Doll, Jr. 2,713 16 Donald W. Burton 2,709 20 Laurie Simon Hodrick 2,713 16 John F. O'Brien 2,709 20 David H. Walsh 2,694 35 Fred G. Weiss 2,713 16 MuniYield New Jersey Insured Fund, Inc. During the six-month period ended April 30, 2006, MuniYield New Jersey Insured Fund, Inc.'s Common Stock shareholders voted on the following proposal. The proposal was approved at a shareholders' meeting on April 27, 2006. A description of the proposal and number of shares voted are as follows: Shares Voted Shares Withheld For From Voting 1. To elect the Fund's Directors: Robert C. Doll, Jr., 8,386,167 158,454 Donald W. Burton 8,381,055 163,566 John F. O'Brien 8,378,369 166,252 David H. Walsh 8,374,783 169,838 During the six-month period ended April 30, 2006, MuniYield New Jersey Insured Fund, Inc.'s Preferred Stock shareholders (Series A--B) voted on the following proposal. The proposal was approved at a shareholders' meeting on April 27, 2006. A description of the proposal and number of shares voted are as follows: Shares Voted Shares Withheld For From Voting 1. To elect the Fund's Board of Directors: Robert C. Doll, Jr., Donald W. Burton, Laurie Simon Hodrick, John F. O'Brien, David H. Walsh and Fred G. Weiss 2,429 354 SEMI-ANNUAL REPORTS APRIL 30, 2006 Proxy Results (concluded) MuniYield Pennsylvania Insured Fund During the six-month period ended April 30, 2006, MuniYield Pennsylvania Insured Fund's Common Shareholders voted on the following proposal. The proposal was approved at a shareholders' meeting on April 27, 2006. A description of the proposal and number of shares voted are as follows: Shares Voted Shares Withheld For From Voting 1. To elect the Fund's Trustees: Robert C. Doll, Jr. 10,979,184 136,012 Donald W. Burton 10,977,744 137,452 John F. O'Brien 10,976,404 138,792 David H. Walsh 10,978,584 136,612 During the six-month period ended April 30, 2006, MuniYield Pennsylvania Insured Fund's Preferred Shareholders (Series A--C) voted on the following proposal. The proposal was approved at a shareholders' meeting on April 27, 2006. A description of the proposal and number of shares voted are as follows: Shares Voted Shares Withheld For From Voting 1. To elect the Fund's Board of Trustees: Robert C. Doll, Jr. 3,702 282 Donald W. Burton 3,702 282 Laurie Simon Hodrick 3,702 282 John F. O'Brien 3,702 282 David H. Walsh 3,702 282 Fred G. Weiss 3,698 286 SEMI-ANNUAL REPORTS APRIL 30, 2006 Officers and Directors/Trustees Robert C. Doll, Jr., President and Director/Trustee Donald W. Burton, Director/Trustee Laurie Simon Hodrick, Director/Trustee John Francis O'Brien, Director/Trustee David H. Walsh, Director/Trustee Fred G. Weiss, Director/Trustee Donald C. Burke, Vice President and Treasurer Kenneth A. Jacob, Senior Vice President John M. Loffredo, Senior Vice President William R. Bock, Vice President Theodore R. Jaeckel Jr., Vice President Robert D. Sneeden, Vice President Jeffrey Hiller, Chief Compliance Officer Alice A. Pellegrino, Secretary MuniYield Florida Insured Fund and MuniYield New Jersey Insured Fund, Inc.: Custodian The Bank of New York 100 Church Street New York, NY 10286 Transfer Agents Common Shares or Stock: Preferred Shares or Stock: The Bank of New York The Bank of New York 101 Barclay Street - 11 East 101 Barclay Street - 7 West New York, NY 10286 New York, NY 10286 MuniYield Pennsylvania Insured Fund: Custodian State Street Bank and Trust Company P.O. Box 351 Boston, MA 02101 Transfer Agents Common Shares: Preferred Shares: Computershare The Bank of New York Trust Company, N.A. 101 Barclay Street - 7 West P.O. Box 43010 New York, NY 10286 Providence, RI 02940-3010 1-800-426-5523 Laurie Simon Hodrick resigned as a Director/Trustee of MuniYield Florida Insured Fund, MuniYield New Jersey Insured Fund, Inc. and MuniYield Pennsylvania Insured Fund effective May 1, 2006. Investment Objectives NYSE Symbol MuniYield Florida Insured Fund seeks to provide shareholders with MFT as high a level of current income exempt from federal income taxes as is consistent with its investment policies and prudent investment management by investing primarily in a portfolio of long-term, investment grade municipal obligations the interest on which, in the opinion of bond counsel to the issuer, is exempt from federal income taxes and which enables shares of the Fund to be exempt from Florida intangible personal property taxes. NYSE Symbol MuniYield New Jersey Insured Fund, Inc. seeks to provide MJI shareholders with as high a level of current income exempt from federal income tax and New Jersey personal income taxes as is consistent with its investment policies and prudent investment management by investing primarily in a portfolio of long-term municipal obligations the interest on which, in the opinion of bond counsel to the issuer, is exempt from federal income tax and New Jersey personal income taxes. NYSE Symbol MuniYield Pennsylvania Insured Fund seeks to provide shareholders MPA with as high a level of current income exempt from federal and Pennsylvania income taxes as is consistent with its investment policies and prudent investment management by investing primarily in a portfolio of long-term municipal obligations the interest on which, in the opinion of bond counsel to the issuer, is exempt from federal and Pennsylvania income taxes. SEMI-ANNUAL REPORTS APRIL 30, 2006 Availability of Quarterly Schedule of Investments The Funds file their complete schedules of portfolio holdings with the Securities and Exchange Commission ("SEC") for the first and third quarters of each fiscal year on Form N-Q. The Funds' Forms N-Q are available on the SEC's Web site at http://www.sec.gov. The Funds' Forms N-Q may also be reviewed and copied at the SEC's Public Reference Room in Washington, DC. Information on the operation of the Public Reference Room may be obtained by calling 1-800-SEC-0330. Electronic Delivery The Funds offer electronic delivery of communications to their shareholders. In order to receive this service, you must register your account and provide us with e-mail information. To sign up for this service, simply access this Web site at http://www.icsdelivery.com/live and follow the instructions. When you visit this site, you will obtain a personal identification number (PIN). You will need this PIN should you wish to update your e-mail address, choose to discontinue this service and/or make any other changes to the service. This service is not available for certain retirement accounts at this time. SEMI-ANNUAL REPORTS APRIL 30, 2006 Item 2 - Code of Ethics - Not Applicable to this semi-annual report Item 3 - Audit Committee Financial Expert - Not Applicable to this semi- annual report Item 4 - Principal Accountant Fees and Services - Not Applicable to this semi-annual report Item 5 - Audit Committee of Listed Registrants - Not Applicable to this semi- annual report Item 6 - Schedule of Investments - Not Applicable Item 7 - Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies - Not Applicable to this semi- annual report Item 8 - Portfolio Managers of Closed-End Management Investment Companies - Not Applicable to this semi-annual report Item 9 - Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers - Not Applicable Item 10 - Submission of Matters to a Vote of Security Holders - Not Applicable Item 11 - Controls and Procedures 11(a) - The registrant's certifying officers have reasonably designed such disclosure controls and procedures to ensure material information relating to the registrant is made known to us by others particularly during the period in which this report is being prepared. The registrant's certifying officers have determined that the registrant's disclosure controls and procedures are effective based on our evaluation of these controls and procedures as of a date within 90 days prior to the filing date of this report. 11(b) - There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the Act (17 CFR 270.30a-3(d)) that occurred during the last fiscal half- year of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting. Item 12 - Exhibits attached hereto 12(a)(1) - Code of Ethics - Not Applicable to this semi-annual report 12(a)(2) - Certifications - Attached hereto 12(a)(3) - Not Applicable 12(b) - Certifications - Attached hereto Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. MuniYield Pennsylvania Insured Fund By: /s/ Robert C. Doll, Jr. --------------------------- Robert C. Doll, Jr., Chief Executive Officer of MuniYield Pennsylvania Insured Fund Date: June 22, 2006 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By: /s/ Robert C. Doll, Jr. --------------------------- Robert C. Doll, Jr., Chief Executive Officer of MuniYield Pennsylvania Insured Fund Date: June 22, 2006 By: /s/ Donald C. Burke --------------------------- Donald C. Burke, Chief Financial Officer of MuniYield Pennsylvania Insured Fund Date: June 22, 2006