UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-CSR CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-4077 Name of Fund: Merrill Lynch U.S. Government Mortgage Fund, Inc. Fund Address: P.O. Box 9011 Princeton, NJ 08543-9011 Name and address of agent for service: Terry K. Glenn, President, Merrill Lynch U.S. Government Mortgage Fund, Inc., 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: 08/31/03 Date of reporting period: 09/01/02 - 08/31/03 Item 1 - Attach shareholder report (BULL LOGO) Merrill Lynch Investment Managers www.mlim.ml.com Merrill Lynch U.S. Government Mortgage Fund Annual Report August 31, 2003 This report is not authorized for use as an offer of sale or a solicitation of an offer to buy shares of the Fund unless accompanied or preceded by the Fund's current prospectus. Past performance results shown in this report should not be considered a representation of future performance. Investment return and principal value of shares will fluctuate so that shares, when redeemed, may be worth more or less than their original cost. Statements and other information herein are as dated and are subject to change. A description of the policies and procedures that the Fund uses to determine how to vote proxies relating to portfolio securities is available (1) without charge, upon request, by calling toll-free 1-800-MER-FUND (1-800-637-3863); (2) on www.mutualfunds.ml.com; and (3) on the Securities and Exchange Commission's website at http://www.sec.gov. Merrill Lynch U.S. Government Mortgage Fund Box 9011 Princeton, NJ 08543-9011 A Letter From the President Dear Shareholder Now more than half behind us, 2003 has been a meaningful year in many respects. After one of the most significant equity market downturns in many investors' memories, this year finally brought hopeful signs for a sustainable economic recovery. With that bit of good news, fixed income investments, which had become the asset class of choice during the long equity market decline, were left to perform on a new playing field. The Federal Reserve Board continued its accommodative monetary policy into June 2003, when it brought the Federal Funds rate down to 1%, its lowest level since 1958. With this move, long-term interest rates continued to be volatile, as investors began to anticipate the impact of future Federal Reserve Board moves and economic revitalization. As of August 31, 2003, the 10-year Treasury bond was yielding 4.47%. This compared to a yield of 3.69% six months earlier and 4.14% one year ago. Against this backdrop, our portfolio managers continued to work diligently to deliver on our commitment to provide superior performance within reasonable expectations for risk and return. With that said, remember also that the advice and guidance of a skilled financial advisor often can mean the difference between fruitful and fruitless investing. A financial professional can help you choose those investments that will best serve you as you plan for your financial future. Finally, I am proud to premiere a new look to our shareholder communications. Our portfolio manager commentaries have been trimmed and organized in such a way that you can get the information you need at a glance, in plain language. Today's markets are confusing enough. We want to help you put it all in perspective. The report's new size also allows us certain mailing efficiencies. We thank you for trusting Merrill Lynch Investment Managers with your investment assets, and we look forward to serving you in the months and years ahead. Sincerely, (Terry K. Glenn) Terry K. Glenn President and Trustee MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 We are pleased to present to you the management team of Merrill Lynch U.S. Government Mortgage Fund Senior Portfolio Manager Frank Viola joined Merrill Lynch Investment Managers in 1997 and heads the Merrill Lynch U.S. Government Mortgage Fund team. Mr. Viola received a bachelor's degree from The Pennsylvania State University and is a CFA R charterholder. He is also an associate of the Society of Actuaries and a member of the American Academy of Actuaries. In addition to Mr. Viola, the investment team includes Co-Portfolio Manager Teresa Giacino, Jeffrey Hewson, Ted Magnani and Tom Musmanno. Ms. Giacino earned a bachelor's degree from Rider University. Mr. Hewson received a bachelor's degree and an MBA from Rutgers University. Mr. Magnani has a bachelor's degree from Rutgers University. Mr. Musmanno received a bachelor's degree from Siena College and an MBA from St. John's University. He is a CFA charterholder and a member of the Association for Investment Management and Research and the New York Society of Security Analysts. The team has a combined 81 years of investment experience. Frank Viola Senior Portfolio Manager Table of Contents A Letter From the President 2 A Discussion With Your Fund's Portfolio Managers 4 Performance Data 6 Schedule of Investments 10 Financial Information 14 Financial Highlights 17 Notes to Financial Statements 22 Independent Auditors' Report 28 Officers and Trustees 29 MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 A Discussion With Your Fund's Portfolio Managers The year was marked by extreme volatility in long-term interest rates, and we ended the period overweight in mortgage-backed securities and with a conservative duration in line with that of the Fund's benchmark. Discuss the economic conditions that existed during the period. Economic news was mixed during the period. Late in 2002 and into 2003, U.S. economic activity slowed as the conflict in Iraq brought consumer and business spending to a standstill. Gross domestic product (GDP) for the first quarter of 2003 grew at only 1.4%, the same rate of growth as the disappointing fourth quarter of 2002. On the positive side, low mortgage rates supported the strength in the housing market and mortgage refinancing provided consumers with some financial flexibility. As the geopolitical concerns subsided, economic growth began to show improvement, with 3.3% growth registered in the second quarter of 2003. By the end of August 2003, it was evident that the U.S. economy was growing still faster. Even if further defense spending increases do not match up to second-quarter levels, we believe consumer spending and business investment expenditure should continue to drive the economy to above 4% growth in the second half of 2003. Despite the generally favorable growth trend, weak labor markets and a more recent decline in mortgage-refinancing activity shed doubt over the sustainability of the economic expansion. Nevertheless, we believe the longer-term prospects for the economy seem bright. Throughout the period, the Federal Reserve Board maintained its accommodative monetary policy, most recently dropping the Federal Funds rate to 1% at its June meeting. We expect short-term interest rates to remain at this level for some time as the Federal Reserve Board maintains its focus on achieving sustainable economic growth. How did the Fund perform during the fiscal year in light of the existing market conditions? For the 12 months ended August 31, 2003, the Fund's Class A, Class B, Class C and Class I Shares had total returns of +1.93%, +1.40%, +1.35% and +2.08%, respectively. This compared to the +2.49% return of the Fund's unmanaged benchmark, the Citigroup Mortgage Index, for the same period. (Fund results shown do not reflect sales charges and would be lower if sales charges were included. Complete performance information can be found on pages 6 - 9 of this report to shareholders.) The slightly longer average duration of the portfolio's mortgage- backed securities (MBS) contributed to the relative underperformance during the period. The Fund's overall exposure to the mortgage market rose as we purchased MBS forward by financing existing positions. That is, we agreed to purchase MBS for a predetermined price at a future time rather than sell some of our holdings to fund these purchases. We sought to reduce the risk associated with this strategy by short-selling U.S. Treasury futures. This was based on our belief that MBS returns would exceed those of Treasury issues. In fact, Fund performance did benefit from an extended rally in mortgage securities during much of the year. However, this strategy detracted from performance in July 2003, when MBS dramatically underperformed Treasury notes. The MBS market recouped some of its losses in August when it outperformed Treasury issues by 28 basis points (.28%). The past year was characterized by considerable interest rate volatility. The yield on the ten-year Treasury note, a benchmark for MBS, reached its historical low in June. At the same time, however, we saw historically high levels of mortgage-refinancing activity. As a result, the prepayments of higher-rate mortgages prevented MBS prices from rising significantly, and MBS returns were eroded. Additionally, the record-high values and refinancing activity shortened the duration of MBS. At one point during the 12-month period, the duration of the Citigroup Mortgage Index was under one year. MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Late in the period, as long-term interest rates increased dramatically and the yield on the ten-year Treasury note rose nearly 150 basis points from its June low, the risk in the MBS market shifted from prepayment risk to duration-extension risk. When interest rates rise considerably, refinancing opportunity diminishes, thereby extending the duration of MBS. At its peak during the 12-month period, the duration of the Citigroup Mortgage Index was 4.7 years. What changes were made to the portfolio during the period? We increased the Fund's exposure to MBS, as this sector provided a significant yield advantage over U.S. Treasury issues with comparable durations. We purchased these securities forward by financing existing positions. We were able to finance much of the portfolio's collateral position at rates that were lower than the effective yields of the securities. The steep Treasury yield curve and the demand for collateralized mortgage obligation issues helped to sustain the strong demand for MBS collateral. Also during the period, we reduced the Fund's exposure to U.S. Treasury securities and agency debt. In addition, as swap spreads (the difference in yields between fixed- and variable-rate securities that are traded among borrowers and lenders) reached historical lows, we reduced the Fund's position in multi-family mortgage pools, as their valuations reached rich levels. How would you characterize the Fund's position at the close of the period? At the end of August, the Fund remained overweight in MBS and was positioned with a near-benchmark duration. While we believe some interest rate volatility will continue in the near future, we also believe that, barring a major geopolitical event, the ten-year Treasury note will trade within a 4.10% - 4.75% yield range. In our opinion, the yield spread between MBS and Treasury issues should tighten as this new range is established and interest rate volatility stabilizes. This should allow MBS to outperform its Treasury counterparts on a duration-adjusted basis. Frank Viola Vice President and Portfolio Manager Teresa L. Giacino Vice President and Portfolio Manager September 9, 2003 Effective April 14, 2003, the share class names for the Merrill Lynch family of mutual funds were changed to be consistent with the standard share classes of most other mutual fund families. As of that date, all Class A Shares were redesignated Class I Shares. At the same time, Class D Shares were redesignated Class A Shares. There are no changes to the Class B or Class C share class labels. Trading symbols have not changed nor have current eligibility rules or pricing structures. This redesignation of share classes does not impact your investment. MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Performance Data About Fund Performance Effective April 14, 2003, Class A Shares were redesignated Class I Shares and Class D Shares were redesignated Class A Shares. Investors are able to purchase shares of the Fund through multiple pricing alternatives: * Class A Shares incur a maximum initial sales charge of 4% and an account maintenance fee of 0.25% (but no distribution fee). * Effective December 1, 2002, Class B Shares are subject to a maximum contingent deferred sales charge of 4%, declining to 0% after six years. All Class B Shares purchased prior to December 1, 2002 will maintain the four-year schedule. In addition, Class B Shares are subject to a distribution fee of 0.50% and an account maintenance fee of 0.25%. These shares automatically convert to Class A Shares after approximately ten years. (There is no initial sales charge for automatic share conversions.) * Class C Shares are subject to a distribution fee of 0.55% and an account maintenance fee of 0.25%. In addition, Class C Shares are subject to a 1% contingent deferred sales charge if redeemed within one year of purchase. * Class I Shares incur a maximum initial sales charge (front-end load) of 4% and bear no ongoing distribution or account maintenance fees. Class I Shares are available only to eligible investors, as detailed in the Fund's prospectus. * Class R Shares do not incur a maximum sales charge (front-end load) or deferred sales charge. These shares are subject to a distribution fee of 0.25% and an account maintenance fee of 0.25%. Class R Shares are available only to certain retirement plans. None of the past results shown should be considered a representation of future performance. Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. Figures shown in each of the following tables assume reinvestment of all dividends and capital gains distributions at net asset value on the payable date. Investment return and principal value of shares will fluctuate so that shares, when redeemed, may be worth more or less than their original cost. Dividends paid to each class of shares will vary because of the different levels of account maintenance, distribution and transfer agency fees applicable to each class, which are deducted from the income available to be paid to shareholders. Recent Performance Results Ten-Year/ 6-Month 12-Month Since Inception Standardized As of August 31, 2003 Total Return Total Return Total Return 30-Day Yield ML U.S. Government Mortgage Fund Class A Shares* -0.94% +1.93% +74.09% 0.88% ML U.S. Government Mortgage Fund Class B Shares* -1.19 +1.40 +65.32 0.40 ML U.S. Government Mortgage Fund Class C Shares* -1.22 +1.35 +71.92 0.35 ML U.S. Government Mortgage Fund Class I Shares* -0.81 +2.08 +84.78 1.12 ML U.S. Government Mortgage Fund Class R Shares* -0.81 -- + 0.44 0.67 Citigroup Mortgage Index** -0.56 +2.49 +91.91/+93.67/+0.57 -- *Investment results shown do not reflect sales charges; results shown would be lower if a sales charge was included. Total investment returns are based on changes in net asset values for the periods shown, and assume reinvestment of all dividends and capital gains distributions at net asset value on the payable date. The Fund's ten-year/inception periods are ten years for Class A & Class B Shares, from 10/21/94 for Class C & Class I Shares, and from 1/03/03 for Class R Shares. **This unmanaged Index reflects the performance of a capital market weighting of the outstanding agency-issued mortgage-backed securities. Ten year/since inception total returns are for ten years, from 10/31/94 and from 1/03/03, respectively. MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Performance Data (continued) TOTAL RETURN BASED ON A $10,000 INVESTMENT A line graph illustrating the growth of a $10,000 investment in ML U.S. Government Mortgage Fund++ Class A and Class B Shares* compared to a similar investment in Citigroup Mortgage Index++++. Values illustrated are as follows: ML U.S. Government Mortgage Fund++ Class A Shares* Date Value August 1993 $ 9,600.00 August 1994 $ 9,402.00 August 1995 $10,293.00 August 1996 $10,729.00 August 1997 $11,727.00 August 1998 $12,648.00 August 1999 $12,772.00 August 2000 $13,676.00 August 2001 $15,240.00 August 2002 $16,394.00 August 2003 $16,712.00 ML U.S. Government Mortgage Fund++ Class B Shares* Date Value August 1993 $10,000.00 August 1994 $ 9,745.00 August 1995 $10,591.00 August 1996 $11,005.00 August 1997 $11,965.00 August 1998 $12,839.00 August 1999 $12,898.00 August 2000 $13,740.00 August 2001 $15,232.00 August 2002 $16,301.00 August 2003 $16,532.00 Citigroup Mortgage Index++++ Date Value August 1993 $10,000.00 August 1994 $10,046.00 August 1995 $11,147.00 August 1996 $11,708.00 August 1997 $12,924.00 August 1998 $14,031.00 August 1999 $14,297.00 August 2000 $15,458.00 August 2001 $17,293.00 August 2002 $18,725.00 August 2003 $19,191.00 *Assuming maximum sales charge, transaction costs and other operating expenses, including advisory fees. ++The Fund invests primarily in U.S. government and U.S. government agency securities, including GNMA mortgage-backed certificates and other mortgage-backed government securities. U.S. government agency securities include debt securities issued or guaranteed or to principal and interest by U.S. government agencies, U.S. government sponsored enterprises and U.S. government instrumentalities that are not direct obligations of the United States. ++++This unmanaged Index reflects the performance of a capital market weighting of the outstanding agency-issued mortgage-backed securities. Past performance is not predictive of future performance. Average Annual Total Return % Return Without % Return With Sales Charge Sales Charge** Class A Shares* One Year Ended 8/31/03 +1.93% -2.15% Five Years Ended 8/31/03 +5.73 +4.87 Ten Years Ended 8/31/03 +5.70 +5.27 *Maximum sales charge is 4%. **Assuming maximum sales charge. % Return % Return Without CDSC With CDSC** Class B Shares* One Year Ended 8/31/03 +1.40% -2.55% Five Years Ended 8/31/03 +5.19 +4.86 Ten Years 8/31/03 +5.16 +5.16 *Maximum contingent deferred sales charge is 4% and is reduced to 0% after six years. **Assuming payment of applicable contingent deferred sales charge. MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Performance Data (continued) TOTAL RETURN BASED ON A $10,000 INVESTMENT A line graph illustrating the growth of a $10,000 investment in ML U.S. Government Mortgage Fund++ Class C and Class I Shares* compared to a similar investment in Citigroup Mortgage Index++++. Values illustrated are as follows: ML U.S. Government Mortgage Fund++ Class C Shares* Date Value 10/21/1994** $10,000.00 August 1995 $11,057.00 August 1996 $11,483.00 August 1997 $12,479.00 August 1998 $13,384.00 August 1999 $13,439.00 August 2000 $14,309.00 August 2001 $15,856.00 August 2002 $16,960.00 August 2003 $17,192.00 ML U.S. Government Mortgage Fund++ Class I Shares* Date Value 10/21/1994** $ 9,600.00 August 1995 $10,709.00 August 1996 $11,192.00 August 1997 $12,275.00 August 1998 $13,272.00 August 1999 $13,436.00 August 2000 $14,408.00 August 2001 $16,095.00 August 2002 $17,374.00 August 2003 $17,739.00 Citigroup Mortgage Index++++ Date Value 10/21/1994** $10,000.00 August 1995 $11,249.00 August 1996 $11,816.00 August 1997 $13,042.00 August 1998 $14,159.00 August 1999 $14,428.00 August 2000 $15,600.00 August 2001 $17,451.00 August 2002 $18,896.00 August 2003 $19,367.00 *Assuming maximum sales charge, transaction costs and other operating expenses, including advisory fees. **Commencement of operations. ++The Fund invests primarily in U.S. government and government agency securities, including GNMA mortgage-backed certificates and other mortgage-backed government securities. U.S. government agency securities include debt securities issued or guaranteed or to principal and interest by U.S. government agencies, U.S. government sponsored enterprises and U.S. government instrumentalities that are not direct obligations of the United States. ++++This unmanaged Index reflects the performance of a capital market weighting of the outstanding agency-issued mortgage-backed securities. The starting date for the Index is from 10/31/94. Past performance is not predictive of future performance. Average Annual Total Return % Return % Return Without CDSC With CDSC** Class C Shares* One Year Ended 8/31/03 +1.35% +0.36% Five Years Ended 8/31/03 +5.14 +5.14 Inception (10/21/94) through 8/31/03 +6.31 +6.31 *Maximum contingent deferred sales charge is 1% and is reduced to 0% after one year. **Assuming payment of applicable contingent deferred sales charge. % Return Without % Return With Sales Charge Sales Charge** Class I Shares* One Year Ended 8/31/03 +2.08% -2.00% Five Years Ended 8/31/03 +5.97 +5.11 Inception (10/21/94) through 8/31/03 +7.18 +6.68 *Maximum sales charge is 4%. **Assuming maximum sales charge. MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Performance Data (concluded) TOTAL RETURN BASED ON A $10,000 INVESTMENT A line graph illustrating the growth of a $10,000 investment in ML U.S. Government Mortgage Fund++ Class R Shares* compared to a similar investment in Citigroup Mortgage Index++++. Values illustrated are as follows: ML U.S. Government Mortgage Fund++ Class R Shares* Date Value 1/03/2003** $10,000.00 August 2003 $10,044.00 Citigroup Mortgage Index++++ Date Value 1/03/2003** $10,000.00 August 2003 $10,057.00 *Assuming maximum sales charge, transaction costs and other operating expenses, including advisory fees. **Commencement of operations. ++The Fund invests primarily in U.S. government and government agency securities, including GNMA mortgage-backed certificates and other mortgage-backed government securities. U.S. government agency securities include debt securities issued or guaranteed or to principal and interest by U.S. government agencies, U.S. government sponsored enterprises and U.S. government instrumentalities that are not direct obligations of the United States. ++++This unmanaged Index reflects the performance of a capital market weighting of the outstanding agency-issued mortgage-backed securities. Past performance is not predictive of future performance. Aggregate Total Return % Return Without Sales Charge Class R Shares Inception (1/03/03) through 8/31/03 +0.44% MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Schedule of Investments Face Interest Original Maturity Issue Amount Rate Date(s) Value Non-U.S. Government Agency Mortgage-Backed Obligations*--1.2% Countrywide Home Loans, Inc. 02-18-A10 $ 7,225,548 5.50 % 11/25/2032 $ 7,282,789 02-32-1A1 6,819,017 6.00 11/25/2032 6,910,626 Deutsche Mortgage Securities, Inc. 03-01-1A1 12,315,932 4.50 4/25/2033 12,429,322 Total Non-U.S. Government Agency Obligations (Cost--$26,665,354) 26,622,737 U.S. Government Agency Obligations--1.6% Fannie Mae 10,000,000 4.25 7/15/2007 10,318,440 Freddie Mac Participation Certificates 25,000,000 5.75 4/29/2009 25,636,250 Total U.S. Government Agency Obligations (Cost--$35,962,493) 35,954,690 U.S. Government Agency Mortgage-Backed Obligations*--104.9% Fannie Mae 25,000,000 4.50 TBA(11) 24,554,700 18,460,810 5.00 TBA(11) 18,524,278 39,518,137 6.50 12/01/2008 - 2/01/2014 41,620,764 104,467,651 6.50 4/01/2026 - 12/01/2032 108,161,346 4,562,229 7.00 11/01/2013 - 11/01/2014 4,850,851 31,370 7.00 8/01/2029 33,092 24,655,008 7.50 7/01/2016 - 12/01/2032 26,218,210 135,840 8.00 9/01/2024 - 9/01/2027 146,798 145,449 8.50 5/01/2010 - 8/01/2012 158,972 3,395,100 8.50(3) 7/15/2023 3,699,715 2,445,855 9.50 3/01/2020 2,614,008 826,155 11.00 10/01/2011 - 8/01/2020 924,460 386,281 13.00 8/01/2013 - 3/01/2015 445,821 Fannie Mae #0385872 5,392,605 4.28(7) 2/01/2010 5,321,292 Mortgage-Backed Securities-- #0629304 971,016 5.50(9) 3/01/2032 967,608 Multi-Family++ #0160465 31,836,907 6.16(8) 8/01/2013 34,434,722 #0073943 1,292,454 7.18(4) 2/01/2019 1,374,605 #0375052 4,471,219 7.50(9) 3/01/2027 4,867,294 #0160024 697,398 7.625(10) 11/01/2003 699,432 Fannie Mae 94-M1-IO 12,336,371 0.87(1) 10/25/2003 15,420 Mortgage-Backed Securities-- 98-M1-IO2 82,399,940 1.0664(1) 2/25/2013 3,077,786 REMICs**--Multi-Family++ 02-M2-N 173,087,334 1.6793(1) 8/25/2012 17,350,967 97-M8-A2 19,135,000 7.16 1/25/2022 20,956,694 96-M3-A2 5,004,474 7.41 3/25/2021 5,100,858 Fannie Mae REMICS** 03-41-YF 25,000,000 1.41 6/25/2028 25,160,310 03-23-AB 17,639,408 4.00 3/25/2017 17,365,512 94-56-TB 2,268,633 6.50(1) 7/25/2022 28,664 Trust 273 802,750 7.00(1) 7/01/2026 136,987 96-W1-AL 3,704,079 7.25 3/25/2026 3,846,795 Freddie Mac 406 10.00 7/01/2019 451 Participation Certificates 2,401,968 10.50 1/01/2010 - 9/01/2020 2,678,877 481,588 11.00 8/01/2010 - 9/01/2020 539,713 607,511 11.50 12/01/2011 - 6/01/2020 685,586 344,036 12.00 5/01/2010 - 6/01/2020 389,358 474,217 12.50 11/01/2014 - 7/01/2019 535,337 898,785 13.00 11/01/2009 - 2/01/2016 1,028,051 MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Schedule of Investments (continued) Face Interest Original Maturity Issue Amount Rate Date(s) Value U.S. Government Agency Mortgage-Backed Obligations (concluded) Freddie Mac $ 8,000,795 4.50 % 6/01/2018 - 9/01/2018 $ 7,860,378 Participation Certificates-- 55,000,000 4.50 8/01/2033 - 9/15/2033 51,210,891 Gold Program 123,254,606 5.00 5/01/2018 - 9/15/2018 123,678,354 167,000,098 5.00 5/01/2033 - 9/15/2033 161,429,534 68,975,756 5.50 3/01/2013 - 12/01/2017 70,461,938 521,000,000 5.50 8/01/2033 - 9/15/2033 518,594,692 79,185,766 6.00 4/01/2009 - 10/01/2017 81,910,952 279,539,847 6.00 3/01/2029 - 9/15/2033 284,048,654 202,449,603 6.50 10/01/2028 - 10/15/2033 209,437,266 10,867,258 7.00 8/01/2011 - 6/01/2016 11,515,883 121,667,636 7.00 7/01/2028 - 7/01/2032 128,157,196 2,858,366 7.50 5/01/2009 - 10/01/2011 3,044,139 67,645,540 7.50 8/01/2017 - 12/01/2032 72,051,755 3,280,130 8.00 1/01/2008 - 7/01/2012 3,530,939 9,198,169 8.00 10/01/2027 - 8/01/2032 9,845,017 770,071 8.50 1/01/2025 - 7/01/2025 835,338 462,761 10.50 10/01/2020 - 12/01/2020 520,102 Freddie Mac REMICS** Trust 134 201,006 9.00(1) 4/01/2022 9,680 Trust 1220 1,106,072 10.00 2/15/2022 1,111,130 Government National Mortgage Association 696,033 5.50 3/15/2029 - 4/15/2029 697,970 5,557,493 6.00 5/15/2024 - 11/15/2031 5,679,382 57,966,599 6.50 10/15/2023 - 3/15/2032 60,337,048 59,747,410 7.00 4/15/2023 - 4/15/2032 63,186,766 19,970,846 7.50 2/15/2025 - 12/15/2031 21,276,110 9,964,191 8.00 1/15/2024 - 8/15/2026 10,761,929 6,541,932 10.00 12/15/2015 - 12/15/2021 7,309,913 31,743 10.50 1/15/2016 - 4/15/2021 35,672 69 11.00 1/15/2016 79 964 11.50 8/15/2013 1,095 Government National Mortgage 2002-81B 10,000,000 5.042 1/16/2029 9,755,366 Association REMICS** Total U.S. Government Agency Mortgage-Backed Obligations (Cost--$2,302,648,107) 2,296,810,502 Short-Term Securities--35.5% U.S. Government Agency Fannie Mae 575,000,000 1.01 9/15/2003 (d) 574,786,854 Obligations*** 160,000,000 1.03 9/18/2003 159,926,756 --------------- 734,713,610 Beneficial Interest/ Shares Held Merrill Lynch Liquidity Series, LLC Money Market Series (a)(b) $ 5,082,000 5,082,000 Merrill Lynch Premier Institutional Fund (a)(b) 3,388,000 3,388,000 --------------- 8,470,000 Face Amount Issue Repurchase Agreements $34,500,000 Morgan Stanley & Co., Inc. purchased on 8/29/2003 to yield 1% to 9/02/2003, repurchase price $34,503,833 collateralized by FGCI and FNMA, 4.417% to 7.00% due 10/01/2013 to 5/01/2033 34,500,000 Total Short-Term Securites (Cost--$777,683,610) 777,683,610 MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Schedule of Investments (continued) Number of Contracts/ Strike Notification Notional Amount Issue Price Date Value Options Purchased--0.1% Call Options 4,740 Government National Mortgage Association, Purchased 30-Year, 5.75% Adjustable Rate Mortgage, Broker Lehman Brothers (5)(6) 100 9/20/2011(5) $ 3,792 $33,600,000 Swaption, expiring 8/27/2013, Broker, Lehman Brothers (2) 1,471,210 --------------- 1,475,002 Put Options $33,600,000 Swaption, expiring 8/27/2013, Broker, Purchased Lehman Brothers (2) 1,644,586 Total Options Purchased (Cost--$3,024,000) 3,119,588 Total Investments (Cost--$3,145,983,564)--143.3% 3,140,191,127 Options Written--(0.2%) Call Options $12,500,000 Swaption, expiring 9/08/2003, Broker, Written Morgan Stanley (2) (7,900) $50,000,000 Swaption, expiring 8/30/2005, Broker, Lehman Brothers (2) (2,818,250) --------------- (2,826,150) Put Options 4,740 Government National Mortgage Association, Written 30-Year, 5.75% Adjustable Rate Mortgage, Broker, Lehman Brothers (5)(6) 100 9/20/2011(5) (4,740) $12,500,000 Swaption, expiring 9/08/2003, Broker, Morgan Stanley (2) (27,138) $50,000,000 Swaption, expiring 8/30/2005, Broker, Lehman Brothers (2) (2,563,800) --------------- (2,595,678) Total Options Written (Premiums Received--$5,487,400) (5,421,828) Total Investments, Net of Options Written (Cost--$3,140,496,164)--143.1% 3,134,769,299 Variation Margin on Financial Futures Contracts (c)--0.1% 610,313 Liabilities in Excess of Other Assets (e)--(43.2%) (945,377,533) --------------- Net Assets--100.0% $ 2,190,002,079 =============== (1)Represents the interest only portion of a mortgage-backed obligation. (2)This European style swaption, which can be exercised only to the expiration date, represents a standby commitment whereby the Fund is obligated to enter into a predetermined interest rate swap contract upon exercise of the swaption. (3)Federal Housing Administration/Veterans' Administration Mortgages packaged by the Federal National Mortgage Association. (4)Represents a balloon mortgage that amortizes on a 22-year schedule and has a 22-year original maturity. (5)Represents European style options which can be exercised only on the notification date. These options, when combined, represent a standby purchase commitment whereby the Fund is obligated to purchase the outstanding principal amount of specific Government National Mortgage Association, 30-year, 5.75% Adjustable Rate Mortgage pools as of September 20, 2011. For this commitment, the Fund receives a net .12% per annum based on the nominal value covered by the options. (6)Adjustable Rate Security. The interest rate resets annually at the one-year Constant Maturing Treasury rate plus 1.5%, subject to a 1% annual adjustment cap and an 11% life cap. (7)Represents balloon mortgages that amortize on a 30-year schedule and has a 7-year original maturity. (8)Represents a mortgage that amortizes on a 15-year schedule and has a 15-year original maturity. (9)Represents a balloon mortgage that amortizes on a 30-year schedule and has a 30-year original maturity. (10)Represents a mortgage that amortizes on a 10-year schedule and has a 10-year original maturity. (11)Represents a "to-be-announced" (TBA) transaction. The Fund has committed to purchasing securities for which all specific information is not available at this time. ++Underlying multi-family loans have prepayment protection by means of lockout periods and/or yield maintenance premiums. *Mortgage-Backed Obligations are subject to principal paydowns as a result of prepayments or refinancings of the underlying mortgage instruments. As a result, the average life may be substantially less than the original maturity. **Real Estate Mortgage Investment Conduits (REMIC). ***U.S. Government Agency Obligations are traded on a discount basis; the interest rate shown reflects the discount rate paid at the time of purchase by the Fund. MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Schedule of Investments (concluded) (a)Investments in companies considered to be an affiliate of the Fund (such companies are defined as "Affiliated Companies" in Section 2(a)(3) of the Investment Company Act of 1940) are as follows: Dividend/ Net Interest Affiliate Activity Income Merrill Lynch Liquidity Series, LLC Money Market Series $5,082,000 $9,396 Merrill Lynch Premier Institutional Fund 3,388,000 $7,384 (b)Security was purchased with the cash proceeds from securities loans. (c)Financial futures contracts sold as of August 31, 2003 were as follows: Number of Expiration Face Unrealized Contracts Issue Date Value Gains 3,140 U.S. Treasury September 5-Year Notes 2003 $358,795,745 $8,734,807 900 U.S. Treasury September 10-Year Notes 2003 100,836,469 458,344 ---------- Total Unrealized Gains--Net $9,193,151 ========== (d)All or a portion of security held as collateral in connection with open financial futures contracts. (e)Swaps entered into as of August 31, 2003 were as follows: Notional Unrealized Amount Appreciation Receive a price return equal to JP Morgan U.S. Agency Mortgage Index Total Return and pay floating rate based on 1-month USD LIBOR, minus .25% Broker, JP Morgan Chase Bank Expires January 2004 $ 30,000,000 -- Receive a price return equal to JP Morgan U.S. Agency Mortgage Index Total Return and pay floating rate based on 1-month USD LIBOR, minus .30% Broker, JP Morgan Chase Bank Expires April 2004 $ 50,000,000 -- Receive a price return equal to JP Morgan U.S. Agency Mortgage Index Total Return and pay floating rate based on 1-month USD LIBOR, minus .30% Broker, JP Morgan Chase Bank Expires November 2003 $ 72,000,000 -- Receive a price return equal to JP Morgan U.S. Agency Mortgage Index Total Return and pay floating rate based on 1-month USD LIBOR, minus .25% Broker, JP Morgan Chase Bank Expires January 2004 $ 50,000,000 -- See Notes to Financial Statements. MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Statement of Assets and Liabilities As of August 31, 2003 Assets Investments, at value (including securities loaned of $8,254,720) (identified cost--$3,142,959,564) $ 3,137,071,539 Options purchased, at value (cost--$3,024,000) 3,119,588 Cash 21,654 Receivables: Securities sold $ 19,533,118 Interest 10,116,587 Beneficial interest sold 2,221,361 Swap settlements 1,638,826 Variation margin 610,313 Principal paydowns 407,628 34,527,833 --------------- Prepaid registration fees and other assets 312,410 --------------- Total assets 3,175,053,024 --------------- Liabilities Collateral on securities loaned, at value 8,470,000 Options purchased, at value (premiums received--$5,487,400) 5,421,828 Payables: Securities purchased 961,193,932 Beneficial interest redeemed 4,645,415 Dividends to shareholders 2,174,625 Distributor 880,399 Investment adviser 802,366 Other affiliates 686,221 970,382,958 --------------- Accrued expenses and other liabilities 776,159 --------------- Total liabilities 985,050,945 --------------- Net Assets Net assets $ 2,190,002,079 =============== Net Assets Consist of Class A Shares of beneficial interest, $.10 par value, unlimited number of shares authorized $ 8,445,911 Class B Shares of beneficial interest, $.10 par value, unlimited number of shares authorized 5,838,398 Class C Shares of beneficial interest, $.10 par value, unlimited number of shares authorized 4,092,593 Class I Shares of beneficial interest, $.10 par value, unlimited number of shares authorized 3,240,968 Class R Shares of beneficial interest, $.10 par value, unlimited number of shares authorized 760 Paid-in capital in excess of par 2,204,348,584 Accumulated distributions in excess of investment income--net $ (1,170,818) Accumulated realized capital losses on investments--net (38,260,602) Unrealized appreciation on investments--net 3,466,285 --------------- Total accumulated losses--net (35,965,135) --------------- Net assets $ 2,190,002,079 =============== Net Asset Value Class A--Based on net assets of $855,543,136 and 84,459,108 shares of beneficial interest outstanding $ 10.13 =============== Class B--Based on net assets of $591,434,966 and 58,383,975 shares of beneficial interest outstanding $ 10.13 =============== Class C--Based on net assets of $414,538,693 and 40,925,926 shares of beneficial interest outstanding $ 10.13 =============== Class I--Based on net assets of $328,408,352 and 32,409,681 shares of beneficial interest outstanding $ 10.13 =============== Class R--Based on net assets of $76,932 and 7,601 shares of beneficial interest outstanding $ 10.12 =============== See Notes to Financial Statements. MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Statement of Operations For the Year Ended August 31, 2003 Investment Income Interest $ 93,477,288 Securities lending--net 16,780 --------------- Total income 93,494,068 --------------- Expenses Investment advisory fees $ 10,501,962 Account maintenance and distribution fees--Class B 4,898,928 Account maintenance and distribution fees--Class C 3,616,519 Account maintenance fees--Class A 2,170,935 Transfer agent fees--Class A 1,557,878 Transfer agent fees--Class B 1,288,255 Transfer agent fees--Class C 901,288 Transfer agent fees--Class I 610,601 Accounting services 582,191 Custodian fees 258,557 Professional fees 161,347 Registration fees 125,041 Printing and shareholder reports 112,447 Trustees' fees and expenses 93,336 Pricing fees 71,527 Account maintenance and distribution fees--Class R 37 Transfer agent fees--Class R 15 Other 87,890 --------------- Total expenses 27,038,754 --------------- Investment income--net 66,455,314 --------------- Realized & Unrealized Gain (Loss) on Investments--Net Realized gain on investments--net 8,431,538 Change in unrealized appreciation on investments--net (36,750,188) --------------- Total realized and unrealized loss on investments--net (28,318,650) --------------- Net Increase in Net Assets Resulting from Operations $ 38,136,664 =============== See Notes to Financial Statements. MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Statements of Changes in Net Assets For the Year Ended August 31, Increase (Decrease) in Net Assets: 2003 2002 Operations Investment income--net $ 66,455,314 $ 70,870,370 Realized gain on investments--net 8,431,538 44,845,955 Change in unrealized appreciation on investments--net (36,750,188) 10,796,050 --------------- --------------- Net increase in net assets resulting from operations 38,136,664 126,512,375 --------------- --------------- Dividends to Shareholders Investment income--net: Class A (26,838,903) (33,007,938) Class B (16,821,329) (20,225,769) Class C (11,397,197) (6,030,923) Class I (11,356,412) (11,605,740) Class R (205) -- --------------- --------------- Net decrease in net assets resulting from dividends to shareholders (66,414,046) (70,870,370) --------------- --------------- Beneficial Interest Transactions Net increase in net assets derived from beneficial interest transactions 105,163,018 570,270,612 --------------- --------------- Net Assets Total increase in net assets 76,885,636 625,912,617 Beginning of year 2,113,116,443 1,487,203,826 --------------- --------------- End of year* $ 2,190,002,079 $ 2,113,116,443 =============== =============== *Accumulated distributions in excess of investment income--net $ (1,170,818) -- =============== =============== See Notes to Financial Statements. MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Financial Highlights The following per share data and ratios have been derived Class A++ from information provided in the financial statements. For the Year Ended August 31, Increase (Decrease) in Net Asset Value: 2003 2002 2001 2000 1999 Per Share Operating Performance Net asset value, beginning of year $ 10.25 $ 9.95 $ 9.44 $ 9.36 $ 9.79 ---------- ---------- ---------- ---------- ---------- Investment income--net .32 .43 .55 .56 .53 Realized and unrealized gain (loss) on investments--net (.12) .30 .51 .08 (.43) ---------- ---------- ---------- ---------- ---------- Total from investment operations .20 .73 1.06 .64 .10 ---------- ---------- ---------- ---------- ---------- Less dividends from investment income--net (.32) (.43) (.55) (.56) (.53) ---------- ---------- ---------- ---------- ---------- Net asset value, end of year $ 10.13 $ 10.25 $ 9.95 $ 9.44 $ 9.36 ========== ========== ========== ========== ========== Total Investment Return* Based on net asset value per share 1.93% 7.54% 11.49% 7.08% .98% ========== ========== ========== ========== ========== Ratios to Average Net Assets Expenses .95% .97% 1.00% 1.00% .95% ========== ========== ========== ========== ========== Investment income--net 3.09% 4.30% 5.59% 5.99% 5.47% ========== ========== ========== ========== ========== Supplemental Data Net assets, end of year (in thousands) $ 855,543 $ 819,410 $ 729,136 $ 720,311 $ 795,813 ========== ========== ========== ========== ========== Portfolio turnover 428.59% 426.77% 199.30% 37.28% 58.16% ========== ========== ========== ========== ========== *Total investment returns exclude the effects of sales charges. ++"Effective April 14, 2003, Class D Shares were redesignated Class A Shares." See Notes to Financial Statements. MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Financial Highlights (continued) The following per share data and ratios have been derived Class B from information provided in the financial statements. For the Year Ended August 31, Increase (Decrease) in Net Asset Value: 2003 2002 2001 2000 1999 Per Share Operating Performance Net asset value, beginning of year $ 10.26 $ 9.95 $ 9.44 $ 9.36 $ 9.79 ---------- ---------- ---------- ---------- ---------- Investment income--net .26 .38 .50 .51 .48 Realized and unrealized gain (loss) on investments--net (.13) .31 .51 .08 (.43) ---------- ---------- ---------- ---------- ---------- Total from investment operations .13 .69 1.01 .59 .05 ---------- ---------- ---------- ---------- ---------- Less dividends from investment income--net (.26) (.38) (.50) (.51) (.48) ---------- ---------- ---------- ---------- ---------- Net asset value, end of year $ 10.13 $ 10.26 $ 9.95 $ 9.44 $ 9.36 ========== ========== ========== ========== ========== Total Investment Return* Based on net asset value per share 1.40% 6.99% 10.91% 6.53% .46% ========== ========== ========== ========== ========== Ratios to Average Net Assets Expenses 1.47% 1.49% 1.52% 1.52% 1.46% ========== ========== ========== ========== ========== Investment income--net 2.58% 3.76% 5.07% 5.47% 4.95% ========== ========== ========== ========== ========== Supplemental Data Net assets, end of year (in thousands) $ 591,435 $ 613,282 $ 466,432 $ 405,846 $ 571,969 ========== ========== ========== ========== ========== Portfolio turnover 428.59% 426.77% 199.30% 37.28% 58.16% ========== ========== ========== ========== ========== *Total investment returns exclude the effects of sales charges. See Notes to Financial Statements. MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Financial Highlights (continued) The following per share data and ratios have been derived Class C from information provided in the financial statements. For the Year Ended August 31, Increase (Decrease) in Net Asset Value: 2003 2002 2001 2000 1999 Per Share Operating Performance Net asset value, beginning of year $ 10.25 $ 9.95 $ 9.44 $ 9.36 $ 9.79 ---------- ---------- ---------- ---------- ---------- Investment income--net .26 .37 .49 .51 .48 Realized and unrealized gain (loss) on investments--net (.12) .30 .51 .08 (.43) ---------- ---------- ---------- ---------- ---------- Total from investment operations .14 .67 1.00 .59 .05 ---------- ---------- ---------- ---------- ---------- Less dividends from investment income--net (.26) (.37) (.49) (.51) (.48) ---------- ---------- ---------- ---------- ---------- Net asset value, end of year $ 10.13 $ 10.25 $ 9.95 $ 9.44 $ 9.36 ========== ========== ========== ========== ========== Total Investment Return* Based on net asset value per share 1.35% 6.94% 10.86% 6.47% .41% ========== ========== ========== ========== ========== Ratios to Average Net Assets Expenses 1.52% 1.54% 1.57% 1.57% 1.51% ========== ========== ========== ========== ========== Investment income--net 2.52% 3.40% 5.00% 5.43% 4.90% ========== ========== ========== ========== ========== Supplemental Data Net assets, end of year (in thousands) $ 414,539 $ 384,119 $ 56,706 $ 30,593 $ 46,614 ========== ========== ========== ========== ========== Portfolio turnover 428.59% 426.77% 199.30% 37.28% 58.16% ========== ========== ========== ========== ========== *Total investment returns exclude the effects of sales charges. See Notes to Financial Statements. MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Financial Highlights (continued) The following per share data and ratios have been derived Class I++ from information provided in the financial statements. For the Year Ended August 31, Increase (Decrease) in Net Asset Value: 2003 2002 2001 2000 1999 Per Share Operating Performance Net asset value, beginning of year $ 10.26 $ 9.95 $ 9.44 $ 9.37 $ 9.80 ---------- ---------- ---------- ---------- ---------- Investment income--net .34 .46 .57 .58 .55 Realized and unrealized gain (loss) on investments--net (.13) .31 .51 .07 (.43) ---------- ---------- ---------- ---------- ---------- Total from investment operations .21 .77 1.08 .65 .12 ---------- ---------- ---------- ---------- ---------- Less dividends from investment income--net (.34) (.46) (.57) (.58) (.55) ---------- ---------- ---------- ---------- ---------- Net asset value, end of year $ 10.13 $ 10.26 $ 9.95 $ 9.44 $ 9.37 ========== ========== ========== ========== ========== Total Investment Return* Based on net asset value per share 2.08% 7.91% 11.77% 7.23% 1.24% ========== ========== ========== ========== ========== Ratios to Average Net Assets Expenses .70% .72% .75% .75% .70% ========== ========== ========== ========== ========== Investment income--net 3.34% 4.53% 5.84% 6.23% 5.71% ========== ========== ========== ========== ========== Supplemental Data Net assets, end of year (in thousands) $ 328,408 $ 296,305 $ 234,930 $ 192,119 $ 212,131 ========== ========== ========== ========== ========== Portfolio turnover 428.59% 426.77% 199.30% 37.28% 58.16% ========== ========== ========== ========== ========== *Total investment returns exclude the effects of sales charges. ++"Effective April 14, 2003, Class A Shares were redesignated Class I Shares." See Notes to Financial Statements. MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Financial Highlights (concluded) Class R The following per share data and ratios have been derived For the Period from information provided in the financial statements. January 3, 2003++ to August 31, Increase (Decrease) in Net Asset Value: 2003 Per Share Operating Performance Net asset value, beginning of period $ 10.31 ---------- Investment income--net .24 Realized and unrealized loss on investments--net (.19) ---------- Total from investment operations .05 ---------- Less dividends from investment income--net (.24) ---------- Net asset value, end of period $ 10.12 ========== Total Investment Return** Based on net asset value per share .44%+++ ========== Ratios to Average Net Assets Expenses 1.23%* ========== Investment income--net 2.81%* ========== Supplemental Data Net assets, end of period (in thousands) $ 77 ========== Portfolio turnover 428.59% ========== *Annualized. **Total investment returns exclude the effects of sales charges. ++Commencement of operations. +++Aggregate total investment return. See Notes to Financial Statements. MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Notes to Financial Statements 1. Significant Accounting Policies: Merrill Lynch U.S. Government Mortgage Fund (the "Fund") is registered under the Investment Company Act of 1940, as amended, as a diversified, open-end management investment company. The Fund's financial statements are prepared in conformity with accounting principles generally accepted in the United States of America, which may require the use of management accruals and estimates. The Fund offers multiple classes of shares. Effective April 14, 2003, Class A Shares were redesignated Class I Shares and Class D Shares were redesignated Class A Shares. The Fund's financial statements and financial highlights contained within this report reflect the new share class redesignation. Shares of Class A and Class I are sold with a front-end sales charge. Shares of Class B and Class C may be subject to a contingent deferred sales charge. Class R Shares are sold only to certain retirement plans. All classes of shares have identical voting, dividend, liquidation and other rights and the same terms and conditions, except that Class A, Class B, Class C and Class R Shares bear certain expenses related to the account maintenance of such shares, and Class B, Class C and Class R Shares also bear certain expenses related to the distribution of such shares. Each class has exclusive voting rights with respect to matters relating to its account maintenance and distribution expenditures. Income, expenses (other than expenses attributable to a specific class) and realized and unrealized gains and losses on investments are allocated daily to each class based on its relative net assets. The following is a summary of significant accounting policies followed by the Fund. (a) Valuation of investments--Securities that are held by the Fund that are traded on stock exchanges or the Nasdaq National Market are valued at the last sale price or official close price on the exchange on which such securities are traded, as of the close of business on the day the securities are being valued or, lacking any sales, at the last available bid price for long positions, and at the last available ask price for short positions. In cases where securities are traded on more than one exchange, the securities are valued on the exchange designated as the primary market by or under the authority of the Board of Trustees of the Fund. Long positions in securities traded in the over-the-counter ("OTC") market, Nasdaq Small Cap or Bulletin Board are valued at the last available bid price or yield equivalent obtained from one or more dealers or pricing services approved by the Board of Trustees of the Fund. Short positions in securities traded in the OTC market are valued at the last available ask price. Portfolio securities that are traded both in the OTC market and on a stock exchange are valued according to the broadest and most representative market. When the Fund writes an option, the amount of the premium received is recorded on the books of the Fund as an asset and an equivalent liability. The amount of the liability is subsequently valued to reflect the current market value of the option written, based on the last sale price in the case of exchange-traded options or, in the case of options traded in the OTC market, the last ask price. Options purchased by the Fund are valued at their last sale price in the case of exchange-traded options or, in the case of options traded in the OTC market, the last bid price. The value of swaps, including interest rate swaps, caps and floors, will be determined by obtaining dealer quotations. Other investments, including futures contracts and related options, are stated at market value. Obligations with remaining maturities of 60 days or less are valued at amortized cost unless the Investment Adviser believes that this method no longer produces fair valuations. Repurchase agreements will be valued at cost plus accrued interest. The Fund employs certain pricing services to provide securities prices for the Fund. Securities and 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 Trustees of the Fund, including valuations furnished by the pricing services retained by the Fund, which may use a matrix system for valuations. The procedures of a pricing service and its valuations are reviewed by the officers of the Fund under the general supervision of the Trustees. Such valuations and procedures will be reviewed periodically by the Trustees. Generally, trading in foreign securities, as well as U.S. Government securities and money market instruments, is substantially completed each day at various times prior to the close of business on the New York Stock Exchange ("NYSE"). The values of such securities used in computing the net asset value of the Fund's shares are determined as of such times. Foreign currency exchange rates also are generally determined prior to the close of business on the NYSE. Occasionally, events affecting the values of such securities and such exchange rates may occur between the times at which they are determined and the close of business on the NYSE that may not be reflected in the computation of the Fund's net asset value. If events (for example, a company announcement, market volatility or a natural disaster) occur during such periods that are expected to materially affect the value of such securities, those securities may be valued at their fair value as determined in good faith by the Board of Trustees or by the Investment Adviser using a pricing service and/or procedures approved by the Board of Trustees. MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Notes to Financial Statements (continued) (b) Repurchase agreements--The Fund invests in U.S. government securities pursuant to repurchase agreements. Under such agreements, the counterparty agrees to repurchase the security at a mutually agreed upon time and price. The Fund takes possession of the underlying securities, marks to market such securities and, if necessary, receives additional securities daily to ensure that the contract is fully collateralized. If the counterparty defaults and the fair value of the collateral declines, liquidation of the collateral by the Fund may be delayed or limited. (c) Derivative financial instruments--The 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 movement 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--The 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--The Fund may write and purchase 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 premiums paid or received). Written and purchased options are non-income producing investments. * Swaps--The Fund may enter into swap agreements, which are over-the- counter contracts in which the Fund and a counterparty agree to make periodic net payments on a specified notional amount. The net payments can be made for a set period of time or may be triggered by a pre-determined credit event. The net periodic payments may be based on a fixed or variable interest rate; the change in market value of a specific security, basket of securities, or index; or the return generated by a security. (d) Income taxes--It is the 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. (e) 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 and extended delivery fees are recognized on the accrual basis. The Fund amortizes all premiums and discounts on debt securities. (f) Prepaid registration fees--Prepaid registration fees are charged to expense as the related shares are issued. MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Notes to Financial Statements (continued) (g) Dividends and distributions--Dividends from net investment income are declared daily and paid monthly. Distributions of capital gains are recorded on the ex-dividend dates. (h) Securities lending--The Fund may lend securities to financial institutions that provide cash or securities issued or guaranteed by the U.S. government as collateral, which will be maintained at all times in an amount equal to at least 100% of the current market value of the loaned securities. The market value of the loaned securities is determined at the close of business of the Fund and any additional required collateral is delivered to the Fund on the next business day. Where the Fund receives securities as collateral for the loaned securities, it collects a fee from the borrower. The Fund typically receives the income on the loaned securities but does not receive the income on the collateral. Where the Fund receives cash collateral, it may invest such collateral and retain the amount earned on such investment, net of any amount rebated to the borrower. Loans of securities are terminable at any time and the borrower, after notice, is required to return borrowed securities within five business days. The Fund may pay reasonable finder's, lending agent, administrative and custodial fees in connection with its loans. In the event that the borrower defaults on its obligation to return borrowed securities because of insolvency or for any other reason, the Fund could experience delays and costs in gaining access to the collateral. The Fund also could suffer a loss where the value of the collateral falls below the market value of the borrowed securities, in the event of borrower default or in the event of losses on investments made with cash collateral. (i) Mortgage dollar rolls--The Fund may sell mortgage-backed securities for delivery in the current month and simultaneously contracts to repurchase substantially similar (same type, coupon and maturity) securities on a specific future date. (j) Reclassification--Accounting principles generally accepted in the United States of America require that certain components of net assets be adjusted to reflect permanent differences between financial and tax reporting. Accordingly, the current year's permanent book/tax differences of $10,577 has been reclassified between paid-in capital in excess of par and accumulated distributions in excess of investment income, $109,238,934 between paid-in capital in excess of par and accumulated net realized capital losses and $1,222,663 has been reclassified between accumulated distributions in excess of investment income and accumulated net realized capital losses. These reclassifications have no effect on net assets or net asset values per share. 2. Investment Advisory Agreement and Transactions with Affiliates: The 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. The Fund has also entered into a Distribution Agreement and Distribution Plans with FAM Distributors, Inc. ("FAMD" or the "Distributor"), which is a wholly-owned subsidiary of Merrill Lynch Group, Inc. FAM is responsible for the management of the Fund's portfolio and provides the necessary personnel, facilities, equipment and certain other services necessary to the operations of the Fund. For such services, the Fund pays a monthly fee based upon the average daily value of the Fund's net assets at the following rate: Portion of Average Daily Value of Net Assets: Rate Not exceeding $500 million .500% In excess of $500 million but not exceeding $1 billion .475% In excess of $1 billion but not exceeding $1.5 billion .450% In excess of $1.5 billion but not exceeding $2 billion .425% In excess of $2 billion but not exceeding $2.5 billion .400% In excess of $2.5 billion but not exceeding $3.5 billion .375% In excess of $3.5 billion but not exceeding $5 billion .350% In excess of $5 billion but not exceeding $6.5 billion .325% Exceeding $6.5 billion .300% MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Notes to Financial Statements (continued) Pursuant to the Distribution Plans adopted by the Fund in accordance with Rule 12b-1 under the Investment Company Act of 1940, the Fund pays the Distributor ongoing account maintenance and distribution fees. The fees are accrued daily and paid monthly at annual rates based upon the average daily net assets of the shares as follows: Account Maintenance Distribution Fee Fee Class A .25% -- Class B .25% .50% Class C .25% .55% Class R .25% .25% Pursuant to a sub-agreement with the Distributor, Merrill Lynch, Pierce, Fenner & Smith Incorporated ("MLPF&S"), a subsidiary of ML & Co., also provides account maintenance and distribution services to the Fund. The ongoing account maintenance fee compensates the Distributor and MLPF&S for providing account maintenance services to Class A, Class B, Class C and Class R shareholders. The ongoing distribution fee compensates the Distributor and MLPF&S for providing shareholder and distribution- related services to Class B, Class C and Class R shareholders. For the year ended August 31, 2003, FAMD earned underwriting discounts and direct commissions and MLPF&S earned dealer concessions on sales of the Fund's Class A and Class I Shares as follows: FAMD MLPF&S Class A $15,626 $150,199 Class I $ 74 $ 867 For the year ended August 31, 2003, MLPF&S received contingent deferred sales charges of $1,531,054 and $412,116 relating to transactions in Class B and Class C Shares, respectively. Furthermore, MLPF&S received contingent deferred sales charges of $500 relating to transactions subject to front-end sales charge waivers in Class A Shares. The Fund has received an exemptive order from the Securities and Exchange Commission permitting it to lend portfolio securities to MLPF&S or its affiliates. Pursuant to that order, the Fund also has retained Merrill Lynch Investment Managers, LLC ("MLIM, LLC"), an affiliate of FAM, as the securities lending agent for a fee based on a share of the returns on investment of cash collateral. MLIM, LLC may, on behalf of the Fund, invest cash collateral received by the Fund for such loans, among other things, in a private investment company managed by MLIM, LLC or in registered money market funds advised by FAM or its affiliates. For the year ended August 31, 2003, MLIM, LLC received $7,122 in securities lending agent fees. Financial Data Services, Inc. ("FDS"), a wholly-owned subsidiary of ML & Co., is the Fund's transfer agent. For the year ended August 31, 2003, the Fund reimbursed FAM $51,449 for certain accounting services. Certain officers and/or trustees of the Fund are officers and/or directors of FAM, PSI, FAMD, FDS, and/or ML & Co. 3. Investments: Purchases and sales of investments, excluding short-term securities, for the year ended August 31, 2003 were $10,242,166,759 and $9,904,308,429, respectively. Net realized gains (losses) for the year ended August 31, 2003 and net unrealized gains (losses) as of August 31, 2003 were as follows: Realized Unrealized Gains (Losses) Gains (Losses) Long-term investments $ 15,041,421 $ (5,888,025) Short-term investments 5,055 -- Options purchased 218,400 95,587 Options written 281,250 65,572 Swaps (1,222,663) -- Financial futures contracts (5,891,925) 9,193,151 --------------- --------------- Total $ 8,431,538 $ 3,466,285 =============== =============== As of August 31, 2003, net unrealized depreciation for Federal income tax purposes aggregated $5,985,647, of which $19,278,719 related to appreciated securities and $25,264,366 related to depreciated securities. The aggregate cost of investments, including options, at August 31, 2003 for Federal income tax purposes was $3,140,754,945. Transactions in options written for the year ended August 31, 2003 were as follows: Call Options Number of Contracts/ Premiums Written Notional Amount Received Outstanding call options written, beginning of year -- -- Options sold 62,500,000 $ 2,723,075 --------------- --------------- Outstanding call options written, end of year 62,500,000 $ 2,723,075 =============== =============== MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Notes to Financial Statements (continued) Put Options Number of Contracts/ Premiums Written Notional Amount Received Outstanding put options written, beginning of year 8,334 -- Options sold 92,500,000 $ 3,045,575 Options expired (30,003,594) (281,250) --------------- --------------- Outstanding put options written, end of year 62,504,740 $ 2,764,325 =============== =============== 4. Shares of Beneficial Interest: Net increase in net assets derived from beneficial interest transactions was $105,163,018 and $570,270,612 for the years ended August 31, 2003 and August 31, 2002, respectively. Transactions in shares of beneficial interest for each class were as follows: Class A Shares for the Year Dollar Ended August 31, 2003++ Shares Amount Shares sold 24,830,194 $ 255,763,407 Automatic conversion of shares 3,615,714 37,226,405 Shares resulting from reorganization 596,152 6,095,331 Shares issued to shareholders in reinvestment of dividends 1,060,137 10,900,865 --------------- --------------- Total issued 30,102,197 309,986,008 Shares redeemed (25,547,897) (262,751,395) --------------- --------------- Net increase 4,554,300 $ 47,234,613 =============== =============== ++"Effective April 14, 2003, Class D Shares were redesignated Class A Shares." Class A Shares for the Year Dollar Ended August 31, 2002++ Shares Amount Shares sold 20,212,614 $ 202,939,375 Automatic conversion of shares 4,242,478 42,579,446 Shares issued to shareholders in reinvestment of dividends 1,401,211 14,032,640 --------------- --------------- Total issued 25,856,303 259,551,461 Shares redeemed (19,239,653) (193,244,943) --------------- --------------- Net increase 6,616,650 $ 66,306,518 =============== =============== ++"Effective April 14, 2003, Class D Shares were redesignated Class A Shares." Class B Shares for the Year Dollar Ended August 31, 2003 Shares Amount Shares sold 18,176,359 $ 187,220,780 Shares resulting from reorganization 4,826,184 49,346,327 Shares issued to shareholders in reinvestment of dividends 1,158,460 11,913,503 --------------- --------------- Total issued 24,161,003 248,480,610 Automatic conversion of shares (3,615,196) (37,226,405) Shares redeemed (21,964,595) (225,788,918) --------------- --------------- Net decrease (1,418,788) $ (14,534,713) =============== =============== Class B Shares for the Year Dollar Ended August 31, 2002 Shares Amount Shares sold 31,093,475 $ 312,870,794 Shares issued to shareholders in reinvestment of dividends 1,334,120 13,361,729 --------------- --------------- Total issued 32,427,595 326,232,523 Automatic conversion of shares (4,242,478) (42,579,446) Shares redeemed (15,266,335) (153,149,838) --------------- --------------- Net increase 12,918,782 $ 130,503,239 =============== =============== Class C Shares for the Year Dollar Ended August 31, 2003 Shares Amount Shares sold 13,348,468 $ 137,411,546 Shares resulting from reorganization 2,032,979 20,784,497 Shares issued to shareholders in reinvestment of dividends 784,713 8,069,165 --------------- --------------- Total issued 16,166,160 166,265,208 Shares redeemed (12,700,515) (130,461,166) --------------- --------------- Net increase 3,465,645 $ 35,804,042 =============== =============== Class C Shares for the Year Dollar Ended August 31, 2002 Shares Amount Shares sold 36,241,942 $ 365,105,905 Shares issued to shareholders in reinvestment of dividends 396,331 3,980,543 --------------- --------------- Total issued 36,638,273 369,086,448 Shares redeemed (4,878,224) (49,036,615) --------------- --------------- Net increase 31,760,049 $ 320,049,833 =============== =============== MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Notes to Financial Statements (concluded) Class I Shares for the Year Dollar Ended August 31, 2003++ Shares Amount Shares sold 17,831,397 $ 183,727,174 Shares resulting from reorganization 519,193 5,310,013 Shares issued to shareholders in reinvestment of dividends 73,598 757,179 --------------- --------------- Total issued 18,424,188 189,794,366 Shares redeemed (14,900,196) (153,212,760) --------------- --------------- Net increase 3,523,992 $ 36,581,606 =============== =============== ++"Effective April 14, 2003, Class A Shares were redesignated Class I Shares." Class I Shares for the Year Dollar Ended August 31, 2002++ Shares Amount Shares sold 17,379,563 $ 174,841,269 Shares issued to shareholders in reinvestment of dividends 112,848 1,130,075 --------------- --------------- Total issued 17,492,411 175,971,344 Shares redeemed (12,214,134) (122,560,322) --------------- --------------- Net increase 5,278,277 $ 53,411,022 =============== =============== ++"Effective April 14, 2003, Class A Shares were redesignated Class I Shares." Class R Shares for the Period January 3, 2003++ Dollar to August 31, 2003 Shares Amount Shares sold 7,588 $ 77,337 Shares issued to shareholders in reinvestment of dividends 13 133 --------------- --------------- Net increase 7,601 $ 77,470 =============== =============== ++Commencement of operations. 5. Short-Term Borrowings: The Fund, along with certain other funds managed by FAM and its affiliates, is a party to a $500,000,000 credit agreement with Bank One, N.A. and certain other lenders. The Fund may borrow under the credit agreement to fund shareholder redemptions and for other lawful purposes other than for leverage. The Fund may borrow up to the maximum amount allowable under the Fund's current prospectus and statement of additional information, subject to various other legal, regulatory or contractual limits. The Fund pays a commitment fee of ..09% per annum based on the Fund's pro rata share of the unused portion of the credit agreement. Amounts borrowed under the credit agreement bear interest at a rate equal to, at each fund's election, the Federal Funds rate plus .50% or a base rate as determined by Bank One, N.A. On November 29, 2002, the credit agreement was renewed for one year under the same terms, except that the commitment was reduced from $1,000,000,000 to $500,000,000. The Fund did not borrow under the credit agreement during the year ended August 31, 2003. 6. Distributions to Shareholders: The tax character of distributions paid during the fiscal years ended August 31, 2003 and August 31, 2002 was as follows: 8/31/2003 8/31/2002 Distributions paid from: Ordinary income $ 66,414,046 $ 70,870,370 --------------- --------------- Total taxable distributions $ 66,414,046 $ 70,870,370 =============== =============== As of August 31, 2003, the components of accumulated losses on a tax basis were as follows: Undistributed ordinary income--net $ -- Undistributed long-term capital gains--net -- --------------- Total undistributed earnings--net -- Capital loss carryforward (25,195,353)* Unrealized losses--net (10,769,782)** --------------- Total accumulated losses--net $ (35,965,135) =============== *On August 31, 2003, the Fund had a net capital loss carryforward of $25,195,353, of which $16,732,658 expires in 2004, $4,697,041 expires in 2008 and $3,765,654 expires in 2009. This amount will be available to offset like amounts of any future taxable gains. **The difference between book-basis and tax-basis net unrealized losses is attributable primarily to the tax deferral of losses on wash sales, the tax deferral of losses on straddles and the realization for tax purposes of unrealized gains (losses) on certain futures contracts. 7. Acquisition of Mercury U.S. Government Securities Fund: On October 21, 2002, the Fund acquired all of the net assets of Mercury U.S. Government Securities Fund pursuant to a plan of reorganization. The acquisition was accomplished by a tax-free exchange of 7,632,157 shares of common stock of Mercury U.S. Government Securities Fund for 7,974,508 shares of common stock of the Fund. Mercury U.S. Government Securities Fund's net assets on that date of $81,536,168, including $2,022,330 of net unrealized appreciation and $331,332 of accumulated net realized capital losses, were combined with those of the Fund. The aggregate net assets immediately after the acquisition amounted to $2,283,359,445. MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Independent Auditors' Report To the Shareholders and Board of Trustees of Merrill Lynch U.S. Government Mortgage Fund: We have audited the accompanying statement of assets and liabilities, including the schedule of investments, of Merrill Lynch U.S. Government Mortgage Fund as of August 31, 2003, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, and the financial highlights for each of the respective periods then ended. These financial statements and financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits. We conducted our audits in accordance with auditing standards generally accepted in the United States of America. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. Our procedures included confirmation of securities owned as of August 31, 2003, by correspondence with the custodian and brokers; where replies were not received from brokers, we performed other auditing procedures. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of Merrill Lynch U.S. Government Mortgage Fund as of August 31, 2003, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and its financial highlights for each of the respective periods then ended, in conformity with accounting principles generally accepted in the United States of America. Deloitte & Touche LLP Princeton, New Jersey October 24, 2003 MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Officers and Trustees (unaudited) Number of Portfolios in Other Public Position(s) Length Fund Complex Directorships Held Of Time Overseen by Held by Name, Address & Age with Fund Served Principal Occupation(s) During Past 5 Years Trustee Trustee Interested Trustee Terry K. Glenn* President 1999 to President and Chairman of Merrill Lynch 122 Funds None P.O. Box 9011 and present Investment Managers, L.P. ("MLIM")/Fund 163 Portfolios Princeton, Trustee and Asset Management, L.P. ("FAM")--Advised NJ 08543-9011 1984 to Funds since 1999; Chairman (Americas Region) Age: 62 present of MLIM from 2000 to 2002; Executive Vice President of MLIM and FAM (which terms as used herein include their corporate predecessors) from 1983 to 2002; President of FAM Distributors, Inc. ("FAMD") from 1986 to 2002 and Director thereof from 1991 to 2002; Executive Vice President and Director of Princeton Services, Inc. ("Princeton Services") from 1993 to 2002; President of Princeton Administrators, L.P. from 1989 to 2002; Director of Financial Data Services, Inc. since 1985. *Mr. Glenn is a director, trustee or member of an advisory board of certain other investment companies for which MLIM or FAM acts as investment adviser. Mr. Glenn is an "interested person," as described in the Investment Company Act, of the Fund based on his former positions with MLIM, FAM, FAMD, Princeton Services and Princeton Administrators, L.P. The Trustee's term is unlimited. Trustees serve until their resignation, removal or death, or until December 31 of the year in which they turn 72. As Fund President, Mr. Glenn serves at the pleasure of the Board of Trustees. Independent Trustees* James H. Bodurtha Trustee 2002 to Director, The China Business Group, Inc. 40 Funds None P.O. Box 9095 present since 1996, and Executive Vice President 59 Portfolios Princeton, thereof from 1996 to 2003; Chairman, NJ 08543-9095 Berkshire Holding Corporation since 1980; Age: 59 Partner, Squire, Sanders & Dempsey from 1980 to 1993. Joe Grills Trustee 1994 to Member of the Committee of Investment of 40 Funds Kimco Realty P.O. Box 9095 present Employee Benefit Assets of the Association 59 Portfolios Corporation Princeton, of Financial Professionals ("CIEBA") since NJ 08543-9095 1986 and its Chairman from 1991 to 1992; Age: 68 Member of the Investment Advisory Committees of the State of New York Common Retirement Fund since 1989; Member of the Investment Advisory Committee of the Howard Hughes Medical Institute from 1997 to 2000; Director, Duke Management Company since 1992 and Vice Chairman thereof since 1998; Director LaSalle Street Fund from 1995 to 2001; Director, Kimco Realty Corporation since 1997; Member of the Investment Advisory Committee of the Virginia Retirement System since 1998 and Vice Chairman thereof since 2002; Director, Montpelier Foundation since 1998 and Vice Chairman thereof since 2000; Member of the Investment Committee of the Woodberry Forest School since 2000; Member of the Investment Committee of the National Trust for Historic Preservation since 2000. MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Officers and Trustees (unaudited)(continued) Number of Portfolios in Other Public Position(s) Length Fund Complex Directorships Held Of Time Overseen by Held by Name, Address & Age with Fund Served Principal Occupation(s) During Past 5 Years Trustee Trustee Independent Trustees* (concluded) Herbert I. London Trustee 2002 to John M. Olin Professor of Humanities, New 40 Funds None P.O. Box 9095 present York University since 1993 and Professor 59 Portfolios Princeton, thereof since 1980; President of Hudson NJ 08543-9095 Institute since 1997 and Trustee thereof Age: 64 since 1980. Andre F. Perold Trustee 2002 to George Gund Professor of Finance and 40 Funds None P.O. Box 9095 present Banking, Harvard Business School since 59 Portfolios Princeton, 2000 and a member of the faculty since NJ 08543-9095 1979; Director and Chairman of the Age: 51 Board, UNX, Inc. since 2003; Director, Sanlam Limited and Sanlam Life since 2001; Director, Genbel Securities and Gensec Bank since 1999; Director, Stockback.com from 2002 to 2002; Trustee of Commonfund from 1989 to 2001; Director, Bulldogresearch.com from 2000 to 2001; Director, Sanlam Investment Management from 1999 to 2001; Director, Quantec Limited from 1991 to 1999. Roberta Cooper Ramo Trustee 2002 to Shareholder, Modrall, Sperling, Roehl, 40 Funds None P.O. Box 9095 present Harris & Sisk, P.A. since 1993; Director 59 Portfolios Princeton, of Cooper's, Inc. since 1999 and NJ 08543-9095 Chairman of the Board since 2000; Age: 61 Director of ECMC, Inc. since 2001. Robert S. Salomon, Jr. Trustee 1996 to Principal of STI Management since 1994; 40 Funds None P.O. Box 9095 present Regular columnist with Forbes Magazine 59 Portfolios Princeton, from 1992 to 2001; Trustee of Commonfund NJ 08543-9095 from 1980 to 2001; Director of Rye Country Age: 66 Day School since 2001. Stephen B. Swensrud Trustee 1984 to Chairman, Fernwood Advisors (investment 41 Funds None P.O. Box 9095 present adviser) since 1996; Principal of Fernwood 60 Portfolios Princeton, Associates (financial consultant) since NJ 08543-9095 1975; Chairman of RPP Corporation since Age: 70 1978; Director, International Mobile Communications, Inc. since 1998. *The Trustee's term is unlimited. Trustees serve until their resignation, removal or death, or until December 31 of the year in which they turn 72. MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Officers and Trustees (unaudited)(concluded) Position(s) Length Held Of Time Name, Address & Age with Fund Served* Principal Occupation(s) During Past 5 Years Fund Officers Donald C. Burke Vice 1993 to First Vice President of MLIM and FAM since 1997 and Treasurer thereof P.O. Box 9011 President present since 1999; Senior Vice President and Treasurer of Princeton Services Princeton, and and since 1999; Vice President of FAMD since 1999; Director of MLIM Taxation NJ 08543-9011 Treasurer 1999 to since 1990. Age: 43 present Frank Viola Vice 2002 to Managing Director of MLIM since 2002; Director (Global Fixed Income) of P.O. Box 9011 President present MLIM from 2000 to 2002; Vice President of MLIM from 1996 to 2000. Princeton, NJ 08543-9011 Age: 38 Teresa L. Giacino Vice 2002 to Vice President (Global Fixed Income) of MLIM since 1992. P.O. Box 9011 President present Princeton, NJ 08543-9011 Age: 41 Bradley J. Lucido Secretary 2001 to Director of MLIM since 2002; Vice President (Legal Advisory) of MLIM from P.O. Box 9011 present 1999 to 2002 and Attorney thereof since 1995. Princeton, NJ 08543-9011 Age: 37 *Officers of the Fund serve at the pleasure of the Board of Trustees. Further information about the Fund's Officers and Directors is available in the Fund's Statement of Additional Information, which can be obtained without charge by calling 1-800-MER-FUND. Custodian The Bank of New York 100 Church Street New York, NY 10286 Transfer Agent Financial Data Services, Inc. 4800 Deer Lake Drive East Jacksonville, FL 32246-6484 800-637-3863 Electronic Delivery The Fund is now offering electronic delivery of communications to its 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 website 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. MERRILL LYNCH U.S. GOVERNMENT MORTGAGE FUND, AUGUST 31, 2003 Item 2 - Did registrant adopt a code of ethics, as of the end of the period covered by this report, that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party? If not, why not? Briefly describe any amendments or waivers that occurred during the period. State here if code of ethics/amendments/waivers are on website and give website address-. State here if fund will send code of ethics to shareholders without charge upon request-- The registrant has adopted a code of ethics, as of the end of the period covered by this report, that applies to the registrant's principal executive officer, principal financial officer and principal accounting officer, or persons performing similar functions. A copy of the code of ethics is available without charge upon request by calling toll-free 1-800-MER-FUND (1-800-637-3863). Item 3 - Did the registrant's board of directors determine that the registrant either: (i) has at least one audit committee financial expert serving on its audit committee; or (ii) does not have an audit committee financial expert serving on its audit committee? If yes, disclose name of financial expert and whether he/she is "independent," (fund may, but is not required, to disclose name/independence of more than one financial expert) If no, explain why not. - The registrant's board of directors has determined that (i) the registrant has the following audit committee financial experts serving on its audit committee and (ii) each audit committee financial expert is independent: (1) Joe Grills, (2) Andre Perold, (3) Robert S. Salomon, Jr., and (4) Stephen B. Swensrud. Item 4 - Disclose annually only (not answered until December 15, 2003) (a) Audit Fees - Disclose aggregate fees billed for each of the last two fiscal years for professional services rendered by the principal accountant for the audit of the registrant's annual financial statements or services that are normally provided by the accountant in connection with statutory and regulatory filings or engagements for those fiscal years. N/A. (b) Audit-Related Fees - Disclose aggregate fees billed in each of the last two fiscal years for assurance and related services by the principal accountant that are reasonably related to the performance of the audit of the registrant's financial statements and are not reported under paragraph (a) of this Item. Registrants shall describe the nature of the services comprising the fees disclosed under this category. N/A. (c) Tax Fees - Disclose aggregate fees billed in each of the last two fiscal years for professional services rendered by the principal accountant for tax compliance, tax advice, and tax planning. Registrants shall describe the nature of the services comprising the fees disclosed under this category. N/A. (d) All Other Fees - Disclose aggregate fees billed in each of the last two fiscal years for products and services provided by the principal accountant, other than the services reported in paragraphs (a) through (c) of this Item. Registrants shall describe the nature of the services comprising the fees disclosed under this category. N/A. (e)(1) Disclose the audit committee's pre-approval policies and procedures described in paragraph (c)(7) of Rule 2-01 of Regulation S-X. N/A. (e)(2) Disclose the percentage of services described in each of paragraphs (b) through (d) of this Item that were approved by the audit committee pursuant to paragraph (c)(7)(i)(C) of Rule 2-01 of Regulation S-X. N/A. (f) If greater than 50%, disclose the percentage of hours expended on the principal accountant's engagement to audit the registrant's financial statements for the most recent fiscal year that were attributed to work performed by persons other than the principal accountant's full-time, permanent employees. N/A. (g) Disclose the aggregate non-audit fees billed by the registrant's accountant for services rendered to the registrant, and rendered to the registrant's investment adviser (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant for each of the last two fiscal years of the registrant. N/A. (h) Disclose whether the registrant's audit committee has considered whether the provision of non-audit services that were rendered to the registrant's investment adviser (not including any subadviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant that were not pre-approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. N/A. Item 5 - If the registrant is a listed issuer as defined in Rule 10A- 3 under the Exchange Act, state whether or not the registrant has a separately-designated standing audit committee established in accordance with Section 3(a)(58)(A) of the Exchange Act. If the registrant has such a committee, however designated, identify each committee member. If the entire board of directors is acting as the registrant's audit committee in Section 3(a)(58)(B) of the Exchange Act, so state. If applicable, provide the disclosure required by Rule 10A-3(d) under the Exchange Act regarding an exemption from the listing standards for audit committees. N/A (Listed issuers must be in compliance with the new listing rules by the earlier of their first annual shareholders meeting after January 2004, or October 31, 2004 (annual requirement)) Item 6 - Reserved Item 7 - For closed-end funds that contain voting securities in their portfolio, describe the policies and procedures that it uses to determine how to vote proxies relating to those portfolio securities. N/A Item 8--Reserved Item 9(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. Item 9(b)--There were no significant changes in the registrant's internal controls or in other factors that could significantly affect these controls subsequent to the date of their evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses. Item 10 - Exhibits 10(a) - Attach code of ethics or amendments/waivers, unless code of ethics or amendments/waivers is on website or offered to shareholders upon request without charge. N/A. 10(b) - Attach certifications pursuant to Section 302 of the Sarbanes-Oxley Act. 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. Merrill Lynch U.S. Government Mortgage Fund, Inc. By: _/s/ Terry K. Glenn_______ Terry K. Glenn, President of Merrill Lynch U.S. Government Mortgage Fund, Inc. Date: October 24, 2003 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/ Terry K. Glenn________ Terry K. Glenn, President of Merrill Lynch U.S. Government Mortgage Fund, Inc. Date: October 24, 2003 By: _/s/ Donald C. Burke________ Donald C. Burke, Chief Financial Officer of Merrill Lynch U.S. Government Mortgage Fund, Inc. Date: October 24, 2003 Attached hereto as a furnished exhibit are the certifications pursuant to Section 906 of the Sarbanes-Oxley Act.