<Page> 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: 811-03326 Morgan Stanley U.S. Government Money Market Trust (Exact name of registrant as specified in charter) 1221 Avenue of the Americas, New York, New York 10020 (Address of principal executive offices) (Zip code) Ronald E. Robison 1221 Avenue of the Americas, New York, New York 10020 (Name and address of agent for service) Registrant's telephone number, including area code: 212-762-4000 Date of fiscal year end: January 31, 2005 Date of reporting period: January 31, 2005 Item 1 - Report to Shareholders <Page> WELCOME, SHAREHOLDER: IN THIS REPORT, YOU'LL LEARN ABOUT HOW YOUR INVESTMENT IN MORGAN STANLEY U.S. GOVERNMENT MONEY MARKET TRUST PERFORMED DURING THE ANNUAL PERIOD. WE WILL PROVIDE AN OVERVIEW OF THE MARKET CONDITIONS, AND DISCUSS SOME OF THE FACTORS THAT AFFECTED PERFORMANCE DURING THE REPORTING PERIOD. IN ADDITION, THIS REPORT INCLUDES THE FUND'S FINANCIAL STATEMENTS AND A LIST OF FUND INVESTMENTS. THIS MATERIAL MUST BE PRECEDED OR ACCOMPANIED BY A PROSPECTUS FOR THE FUND BEING OFFERED. MARKET FORECASTS PROVIDED IN THIS REPORT MAY NOT NECESSARILY COME TO PASS. THERE IS NO ASSURANCE THAT THE FUND WILL ACHIEVE ITS INVESTMENT OBJECTIVE. THE FUND IS SUBJECT TO MARKET RISK, WHICH IS THE POSSIBILITY THAT MARKET VALUES OF SECURITIES OWNED BY THE FUND WILL DECLINE AND, THEREFORE, THE VALUE OF THE FUND'S SHARES MAY BE LESS THAN WHAT YOU PAID FOR THEM. ACCORDINGLY, YOU CAN LOSE MONEY INVESTING IN THIS FUND. <Page> FUND REPORT For the year ended January 31, 2005 MARKET CONDITIONS During the 12 months ended January 31, 2005, favorable economic trends began to appear. While the growth of the gross domestic product (or GDP) fell somewhat in the fourth quarter of 2004 to 3.1 percent, it had been above this level for the three previous quarters of the year. Job growth (as measured by non-farm payrolls), which slowed in mid 2004, appeared to regain some momentum after July. In addition, leading economic indicators turned positive in November, after posting five consecutive months of contraction. As a result, January 2005 consumer confidence rose to its highest level in six months, well above analysts' expectations. The Federal Open Market Committee (the "Fed") began its current tightening cycle at its June 30 meeting, and went on to increase its target rate for federal funds a cumulative 125 basis points over five separate meetings to 2.25 percent as of the December meeting. The Fed's formal risk assessment was balanced, and they have stated that increases will continue at a "measured pace." Against this backdrop, money market fund yield levels began to rise from record lows. PERFORMANCE ANALYSIS As of January 31, 2005, the U.S. Government Money Market Trust had net assets in excess of $1.12 billion. For the 12-month period ended January 31, 2005, the Fund provided a return of 0.78 percent. For the seven-day period ended January 31, 2005, the Fund provided an effective annualized yield of 1.68 percent and a current annualized yield of 1.66 percent, while its 30-day moving average annualized yield for January was 1.64 percent. PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. Our strategy in managing the Fund remained consistent with our long-term focus on maintaining preservation of capital and liquidity. On January 31, 2005, approximately 57 percent of the Fund was invested in Federal Home Loan Bank obligations, 19 percent in Federal Home Loan Mortgage Corporation obligations, 11 percent in repurchase agreements, 10 percent in Federal National Mortgage Association obligations, two percent in Federal Farm Credit Bank obligations and one percent in direct Treasuries. As of the end of January, the Fund's weighted average maturity was 36 days and 95 percent of holdings were due to mature within three months. THERE IS NO GUARANTEE THAT ANY SECTORS MENTIONED WILL CONTINUE TO PERFORM WELL OR BE HELD BY THE FUND IN THE FUTURE. PORTFOLIO COMPOSITION <Table> U.S. Government Agencies 88.3% Repurchase Agreements 11.1 U.S. Treasury Bills 0.6 </Table> MATURITY SCHEDULE <Table> 1 - 30 Days 53.8% 31 - 60 Days 24.2 61 - 90 Days 17.2 91 - 120 Days 2.9 121+ Days 1.9 </Table> DATA AS OF JANUARY 31, 2005. SUBJECT TO CHANGE DAILY. ALL PERCENTAGES FOR PORTFOLIO COMPOSITION AND MATURITY SCHEDULE ARE AS A PERCENTAGE OF TOTAL INVESTMENTS. PROVIDED FOR INFORMATIONAL PURPOSES ONLY AND SHOULD NOT BE DEEMED A RECOMMENDATION TO BUY OR SELL THE SECURITIES MENTIONED. MORGAN STANLEY IS A FULL-SERVICE SECURITIES FIRM ENGAGED IN SECURITIES TRADING AND BROKERAGE ACTIVITIES, INVESTMENT BANKING, RESEARCH AND ANALYSIS, FINANCING AND FINANCIAL ADVISORY SERVICES. 2 <Page> INVESTMENT STRATEGY THE FUND WILL INVEST IN HIGH QUALITY, SHORT-TERM U.S. GOVERNMENT SECURITIES. THE FUND'S "INVESTMENT ADVISER," MORGAN STANLEY INVESTMENT ADVISORS INC., SEEKS TO MAINTAIN THE FUND'S SHARE PRICE AT $1.00. THE SHARE PRICE REMAINING STABLE AT $1.00 MEANS THAT THE FUND WOULD PRESERVE THE PRINCIPAL VALUE OF YOUR INVESTMENT. AN INVESTMENT IN THE FUND IS NOT INSURED OR GUARANTEED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION OR ANY OTHER GOVERNMENT AGENCY. ALTHOUGH THE FUND SEEKS TO PRESERVE THE VALUE OF YOUR INVESTMENT AT $1.00 PER SHARE, IT IS POSSIBLE TO LOSE MONEY BY INVESTING IN THE FUND. FOR MORE INFORMATION ABOUT PORTFOLIO HOLDINGS EACH MORGAN STANLEY FUND PROVIDES A COMPLETE SCHEDULE OF PORTFOLIO HOLDINGS IN ITS SEMIANNUAL AND ANNUAL REPORTS WITHIN 60 DAYS OF THE END OF THE FUND'S SECOND AND FOURTH FISCAL QUARTERS BY FILING THE SCHEDULE ELECTRONICALLY WITH THE SECURITIES AND EXCHANGE COMMISSION (SEC). THE SEMIANNUAL REPORTS ARE FILED ON FORM N-CSRS AND THE ANNUAL REPORTS ARE FILED ON FORM N-CSR. MORGAN STANLEY ALSO DELIVERS THE SEMIANNUAL AND ANNUAL REPORTS TO FUND SHAREHOLDERS AND MAKES THESE REPORTS AVAILABLE ON ITS PUBLIC WEB SITE, www.morganstanley.com. EACH MORGAN STANLEY FUND ALSO FILES A COMPLETE SCHEDULE OF PORTFOLIO HOLDINGS WITH THE SEC FOR THE FUND'S FIRST AND THIRD FISCAL QUARTERS ON FORM N-Q. MORGAN STANLEY DOES NOT DELIVER THE REPORTS FOR THE FIRST AND THIRD FISCAL QUARTERS TO SHAREHOLDERS, NOR ARE THE REPORTS POSTED TO THE MORGAN STANLEY PUBLIC WEB SITE. YOU MAY, HOWEVER, OBTAIN THE FORM N-Q FILINGS (AS WELL AS THE FORM N-CSR AND N-CSRS FILINGS) BY ACCESSING THE SEC'S WEB SITE, http://www.sec.gov. YOU MAY ALSO REVIEW AND COPY THEM AT THE SEC'S PUBLIC REFERENCE ROOM IN WASHINGTON, DC. INFORMATION ON THE OPERATION OF THE SEC'S PUBLIC REFERENCE ROOM MAY BE OBTAINED BY CALLING THE SEC AT (800) SEC-0330. YOU CAN ALSO REQUEST COPIES OF THESE MATERIALS, UPON PAYMENT OF A DUPLICATING FEE, BY ELECTRONIC REQUEST AT THE SEC'S E-MAIL ADDRESS (publicinfo@sec.gov) OR BY WRITING THE PUBLIC REFERENCE SECTION OF THE SEC, WASHINGTON, DC 20549-0102. YOU MAY OBTAIN COPIES OF A FUND'S FISCAL QUARTER FILINGS BY CONTACTING MORGAN STANLEY CLIENT RELATIONS AT (800) 869-NEWS. HOUSEHOLDING NOTICE TO REDUCE PRINTING AND MAILING COSTS, THE FUND ATTEMPTS TO ELIMINATE DUPLICATE MAILINGS TO THE SAME ADDRESS. THE FUND DELIVERS A SINGLE COPY OF CERTAIN SHAREHOLDER DOCUMENTS, INCLUDING SHAREHOLDER REPORTS, PROSPECTUSES AND PROXY MATERIALS, TO INVESTORS WITH THE SAME LAST NAME WHO RESIDE AT THE SAME ADDRESS. YOUR PARTICIPATION IN THIS PROGRAM WILL CONTINUE FOR AN UNLIMITED PERIOD OF TIME UNLESS YOU INSTRUCT US OTHERWISE. YOU CAN REQUEST MULTIPLE COPIES OF THESE DOCUMENTS BY CALLING (800) 350-6414, 8:00 A.M. TO 8:00 P.M., ET. ONCE OUR CUSTOMER SERVICE CENTER HAS RECEIVED YOUR INSTRUCTIONS, WE WILL BEGIN SENDING INDIVIDUAL COPIES FOR EACH ACCOUNT WITHIN 30 DAYS. 3 <Page> EXPENSE EXAMPLE As a shareholder of the Fund, you incur ongoing costs, including management fees; distribution and service (12b-1) fees; other Fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period of 08/01/04 - 01/31/05. ACTUAL EXPENSES The first line of the table below provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. HYPOTHETICAL EXAMPLE FOR COMPARISON PURPOSES The second line of the table below provides information about hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing cost of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the table are meant to highlight your ongoing costs only. Therefore, the second line of the table is useful in comparing ongoing costs, and will not help you determine the relative total cost of owning different funds that have transactional costs, such as sales charges (loads), and redemption fees, or exchange fees. <Table> <Caption> BEGINNING ENDING EXPENSES PAID ACCOUNT VALUE ACCOUNT VALUE DURING PERIOD * --------------- --------------- --------------- 08/01/04 - 08/01/04 01/31/05 01/31/05 --------------- --------------- --------------- Actual (0.59% return) $ 1,000.00 $ 1,005.90 $ 3.68 Hypothetical (5% annual return before expenses) $ 1,000.00 $ 1,021.47 $ 3.71 </Table> - ---------- * EXPENSES ARE EQUAL TO THE FUND'S ANNUALIZED EXPENSE RATIO OF 0.73% MULTIPLIED BY THE AVERAGE ACCOUNT VALUE OVER THE PERIOD, MULTIPLIED BY 184/366 (TO REFLECT THE ONE-HALF YEAR PERIOD). 4 <Page> MORGAN STANLEY U.S. GOVERNMENT MONEY MARKET TRUST PORTFOLIO OF INVESTMENTS - JANUARY 31, 2005 <Table> <Caption> ANNUALIZED PRINCIPAL YIELD AMOUNT IN ON DATE OF MATURITY THOUSANDS DESCRIPTION PURCHASE DATE VALUE - ------------------------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AGENCY - DISCOUNT NOTES (63.2%) $ 384,447 Federal Home Loan Banks 2.06 - 2.65% 02/02/05 - 06/17/05 $ 383,491,168 214,803 Federal Home Loan Mortgage Corp. 1.93 - 2.55 02/03/05 - 05/31/05 214,076,358 112,311 Federal National Mortgage Assoc. 1.93 - 2.60 02/02/05 - 04/27/05 112,087,347 ----------------- TOTAL U.S. GOVERNMENT AGENCY - DISCOUNT NOTES (COST $709,654,873) 709,654,873 ----------------- U.S. GOVERNMENT AGENCY - FLOATING RATE NOTES (25.9%) 25,000 Federal Farm Credit Banks 2.42 04/21/05 24,998,918 265,000 Federal Home Loan Banks 2.28 - 2.48 03/15/05 - 09/16/05 264,980,973 ----------------- TOTAL U.S. GOVERNMENT AGENCY - FLOATING RATE NOTES (COST $289,979,891) 289,979,891 ----------------- REPURCHASE AGREEMENTS (11.2%) 104,500 Banc of America Securities LLC (dated 01/31/05; proceeds $104,507,257) (a) 2.50 02/01/05 104,500,000 20,000 Goldman Sachs Group, Inc. (The) (dated 01/27/05; proceeds $20,018,744) (b) 2.41 02/10/05 20,000,000 1,393 The Bank of New York (dated 01/31/05; proceeds $1,393,194) (c) 2.375 02/01/05 1,393,102 ----------------- TOTAL REPURCHASE AGREEMENTS (COST $125,893,102) 125,893,102 ----------------- U.S. GOVERNMENT OBLIGATION (0.6%) 7,000 U.S. Treasury Bill (COST $6,927,280) 2.54 06/30/05 6,927,280 ----------------- TOTAL INVESTMENTS (COST $1,132,455,146) (d) 100.9% 1,132,455,146 LIABILITIES IN EXCESS OF OTHER ASSETS (0.9) (9,709,397) ----- ----------------- NET ASSETS 100.0% $ 1,122,745,749 ===== ================= </Table> - ---------- (a) COLLATERALIZED BY FEDERAL NATIONAL MORTGAGE ASSOC. 5.00% DUE 10/01/33 VALUED AT $48,823,268 AND FEDERAL MORTGAGE ACCEPTANCE CORP. 4.50% DUE 06/01/19 VALUED AT $57,766,732. (b) COLLATERALIZED BY FEDERAL NATIONAL MORTGAGE ASSOC. 0.00% DUE 03/16/05 VALUED AT $20,400,614. (c) COLLATERALIZED BY FEDERAL NATIONAL MORTGAGE ASSOC. 4.187% DUE 03/01/34 VALUED AT $1,420,964. (d) COST IS THE SAME FOR FEDERAL INCOME TAX PURPOSES. SEE NOTES TO FINANCIAL STATEMENTS 5 <Page> MORGAN STANLEY U.S. GOVERNMENT MONEY MARKET TRUST FINANCIAL STATEMENTS STATEMENT OF ASSETS AND LIABILITIES JANUARY 31, 2005 <Table> ASSETS: Investments in securities, at value (cost $1,132,455,146) (including repurchase agreements of $125,893,102) $ 1,132,455,146 Cash 90,001 Receivable for: Interest 631,177 Shares of beneficial interest sold 11,060 Prepaid expenses and other assets 66,133 ----------------- TOTAL ASSETS 1,133,253,517 ----------------- LIABILITIES: Payable for: Shares of beneficial interest redeemed 9,838,379 Investment advisory fee 374,325 Distribution fee 77,584 Administration fee 48,271 Accrued expenses and other payables 169,209 ----------------- TOTAL LIABILITIES 10,507,768 ----------------- NET ASSETS $ 1,122,745,749 ================= COMPOSITION OF NET ASSETS: Paid-in-capital $ 1,122,660,636 Accumulated undistributed net investment income 85,113 ----------------- NET ASSETS $ 1,122,745,749 ================= NET ASSET VALUE PER SHARE, 1,122,725,548 shares outstanding (UNLIMITED SHARES AUTHORIZED OF $.01 PAR VALUE) $ 1.00 ================= </Table> SEE NOTES TO FINANCIAL STATEMENTS 6 <Page> STATEMENT OF OPERATIONS FOR THE YEAR ENDED JANUARY 31, 2005 <Table> NET INVESTMENT INCOME: INTEREST INCOME $ 17,725,042 ----------------- EXPENSES Investment advisory fee 5,086,337 Transfer agent fees and expenses 1,870,332 Distribution fee 1,188,929 Shareholder reports and notices 210,841 Administration fee 144,007 Registration fees 78,579 Professional fees 67,509 Custodian fees 59,666 Trustees' fees and expenses 24,566 Other 52,947 ----------------- TOTAL EXPENSES 8,783,713 ----------------- NET INVESTMENT INCOME $ 8,941,329 ================= </Table> SEE NOTES TO FINANCIAL STATEMENTS 7 <Page> STATEMENT OF CHANGES IN NET ASSETS <Table> <Caption> FOR THE YEAR FOR THE YEAR ENDED ENDED JANUARY 31, 2005 JANUARY 31, 2004 ------------------ ------------------ INCREASE (DECREASE) IN NET ASSETS: OPERATIONS: Net investment income $ 8,941,329 $ 5,655,210 Dividends to shareholders from net investment income (8,966,340) (5,677,194) Net decrease from transactions in shares of beneficial interest (146,513,383) (70,286,719) ------------------ ------------------ NET DECREASE (146,538,394) (70,308,703) NET ASSETS: Beginning of period 1,269,284,143 1,339,592,846 ------------------ ------------------ END OF PERIOD (INCLUDING ACCUMULATED UNDISTRIBUTED NET INVESTMENT INCOME OF $85,113 AND $110,124, RESPECTIVELY) $ 1,122,745,749 $ 1,269,284,143 ================== ================== </Table> SEE NOTES TO FINANCIAL STATEMENTS 8 <Page> MORGAN STANLEY U.S. GOVERNMENT MONEY MARKET TRUST NOTES TO FINANCIAL STATEMENTS - JANUARY 31, 2005 1. ORGANIZATION AND ACCOUNTING POLICIES Morgan Stanley U.S. Government Money Market Trust (the "Fund") is registered under the Investment Company Act of 1940, as amended (the "Act"), as a diversified, open-end management investment company. The Fund's investment objectives are security of principal, high current income and liquidity. The Fund was organized as a Massachusetts business trust on November 18, 1981 and commenced operations on February 17, 1982. The following is a summary of significant accounting policies: A. VALUATION OF INVESTMENTS -- Portfolio securities are valued at amortized cost, which approximates market value. B. ACCOUNTING FOR INVESTMENTS -- Security transactions are accounted for on the trade date (date the order to buy or sell is executed). Realized gains and losses on security transactions are determined by the identified cost method. Discounts are accreted and premiums are amortized over the life of the respective securities. Interest income is accrued daily. C. REPURCHASE AGREEMENTS -- The Fund may invest directly with institutions in repurchase agreements. The Fund's custodian receives the collateral, which is marked-to-market daily to determine that the value of the collateral does not decrease below the repurchase price plus accrued interest. D. FEDERAL INCOME TAX POLICY -- 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. Accordingly, no federal income tax provision is required. E. DIVIDENDS AND DISTRIBUTIONS TO SHAREHOLDERS -- The Fund records dividends and distributions to shareholders as of the close of each business day. F. USE OF ESTIMATES -- The preparation of financial statements in accordance with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts and disclosures. Actual results could differ from those estimates. 2. INVESTMENT ADVISORY/ADMINISTRATION AGREEMENTS Effective November 1, 2004, pursuant to an Investment Advisory Agreement with Morgan Stanley Investment Advisors Inc. (the "Investment Adviser"), the Fund pays the Investment Adviser an advisory fee, accrued daily and payable monthly, by applying the following annual rates to the net assets of the Fund determined as of the close of each business day: 0.45% to the portion of the daily net assets not exceeding $500 million; 0.375% to the portion of the daily net assets exceeding $500 million but not exceeding $750 million; 0.325% to the portion of the daily net assets exceeding $750 million but not exceeding $1 billion; 0.30% to the portion of the daily net assets exceeding $1 billion but not 9 <Page> exceeding $1.5 billion; 0.275% to the portion of the daily net assets exceeding $1.5 billion but not exceeding $2 billion; 0.25% to the portion of the daily net assets exceeding $2 billion but not exceeding $2.5 billion; 0.225% to the portion of the daily net assets exceeding $2.5 billion but not exceeding $3 billion; and 0.20% to the portion of the daily net assets exceeding $3 billion. Effective November 1, 2004, pursuant to an Administration Agreement with Morgan Stanley Services Company Inc. (the "Administrator"), an affiliate of the Investment Adviser, the Fund pays an administration fee, accrued daily and payable monthly, by applying the annual rate of 0.05% to the Fund's daily net assets. Prior to November 1, 2004, the Fund had retained the Investment Adviser to provide administrative services and to manage the investment of the Fund's assets pursuant to an investment management agreement pursuant to which the Fund paid the Investment Adviser a monthly management fee, accrued daily and payable monthly, by applying the following annual rates to the net assets of the Fund determined as of the close of each business day: 0.50% to the portion of the daily net assets not exceeding $500 million; 0.425% to the portion of the daily net assets exceeding $500 million but not exceeding $750 million; 0.375% to the portion of the daily net assets exceeding $750 million but not exceeding $1 billion; 0.35% to the portion of the daily net assets exceeding $1 billion but not exceeding $1.5 billion; 0.325% to the portion of the daily net assets exceeding $1.5 billion but not exceeding $2 billion; 0.30% to the portion of the daily net assets exceeding $2 billion but not exceeding $2.5 billion; 0.275% to the portion of the daily net assets exceeding $2.5 billion but not exceeding $3 billion; and 0.25% to the portion of the daily net assets exceeding $3 billion. For the year ended January 31, 2005 and through April 30, 2006, the Investment Adviser agreed to waive its fee and reimburse expenses to the extent they exceed 0.75% of the daily net assets of the Fund. 3. PLAN OF DISTRIBUTION Morgan Stanley Distributors Inc. (the "Distributor"), an affiliate of the Investment Adviser, is the distributor of the Fund's shares and in accordance with a Plan of Distribution (the "Plan") pursuant to Rule 12b-1 under the Act, finances certain expenses in connection with the promotion of sales of Fund shares. Reimbursements for these expenses are made in monthly payments by the Fund to the Distributor, which will in no event exceed an amount equal to a payment at the annual rate of 0.15% of the Fund's average daily net assets during the month. Expenses incurred by the Distributor pursuant to the Plan in any fiscal year will not be reimbursed by the Fund through payments accrued in any subsequent fiscal year. For the year ended January 31, 2005, the distribution fee was accrued at the annual rate of 0.10%. 10 <Page> 4. SECURITY TRANSACTIONS AND TRANSACTIONS WITH AFFILIATES The cost of purchases and proceeds from sales/maturities of portfolio securities for the year ended January 31, 2005 aggregated $26,343,738,180 and $26,503,766,156, respectively. The Fund has an unfunded noncontributory defined benefit pension plan covering certain independent Trustees of the Fund who will have served as independent Trustees for at least five years at the time of retirement. Benefits under this plan are based on factors which include years of service and compensation. Aggregate pension costs for the year ended January 31, 2005 included in Trustees' fees and expenses in the Statement of Operations amounted to $7,417. At January 31, 2005, the Fund had an accrued pension liability of $60,952 which is included in accrued expenses in the Statement of Assets and Liabilities. On December 2, 2003, the Trustees voted to close the plan to new participants and eliminate the future benefits growth due to increases to compensation after July 31, 2003. Effective April 1, 2004, the Fund began an unfunded Deferred Compensation Plan (the "Compensation Plan") which allows each independent Trustee to defer payment of all, or a portion, of the fees he receives for serving on the Board of Trustees. Each eligible Trustee generally may elect to have the deferred amounts credited with a return equal to the total return on one or more of the Morgan Stanley funds that are offered as investment options under the Compensation Plan. Appreciation/depreciation and distributions received from these investments are recorded with an offsetting increase/decrease in the deferred compensation obligation and do not affect the net asset value of the Fund. 5. SHARES OF BENEFICIAL INTEREST Transactions in shares of beneficial interest, at $1.00 per share, were as follows: <Table> <Caption> FOR THE YEAR FOR THE YEAR ENDED ENDED JANUARY 31, 2005 JANUARY 31, 2004 ---------------- ---------------- Shares sold 2,729,300,423 3,002,675,253 Shares issued in reinvestment of dividends 8,935,675 5,661,041 ---------------- ---------------- 2,738,236,098 3,008,336,294 Shares redeemed (2,884,749,481) (3,078,623,013) ---------------- ---------------- Net decrease (146,513,383) (70,286,719) ================ ================ </Table> 11 <Page> 6. LEGAL MATTERS The Investment Adviser, certain affiliates of the Investment Adviser, certain officers of such affiliates and certain investment companies advised by the Investment Adviser or its affiliates, including the Fund, are named as defendants in a consolidated class action. This consolidated action also names as defendants certain individual Trustees and Directors of the Morgan Stanley funds. The consolidated amended complaint generally alleges that defendants, including the Fund, violated their statutory disclosure obligations and fiduciary duties by failing properly to disclose (i) that the Investment Adviser and certain affiliates of the Investment Adviser allegedly offered economic incentives to brokers and others to recommend the funds advised by the Investment Adviser or its affiliates to investors rather than funds managed by other companies, and (ii) that the funds advised by the Investment Adviser or its affiliates, including the Fund, allegedly paid excessive commissions to brokers in return for their efforts to recommend these funds to investors. The complaint seeks, among other things, unspecified compensatory damages, rescissionary damages, fees and costs. The defendants have moved to dismiss the action and intend to otherwise vigorously defend it. On March 10, 2005, Plaintiffs sought leave to supplement their complaint to assert claims on behalf of other investors. While the Fund and Adviser believe that each has meritorious defenses, the ultimate outcome of this matter is not presently determinable at this early stage of the litigation, and no provision has been made in the Fund's financial statements for the effect, if any, of this matter. 12 <Page> MORGAN STANLEY U.S. GOVERNMENT MONEY MARKET TRUST FINANCIAL HIGHLIGHTS Selected ratios and per share data for a share of beneficial interest outstanding throughout each period: <Table> <Caption> FOR THE YEAR ENDED JANUARY 31, ----------------------------------------------------------------------------------------- 2005 2004 2003 2002 2001 ------------ ------------ ------------ ------------ ------------ SELECTED PER SHARE DATA: Net asset value, beginning of period $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 ------------ ------------ ------------ ------------ ------------ Net investment income from investment operations 0.008 0.004 0.011 0.032 0.056 Less dividends from net investment income (0.008) (0.004) (0.011) (0.032) (0.056) ------------ ------------ ------------ ------------ ------------ Net asset value, end of period $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 ============ ============ ============ ============ ============ TOTAL RETURN 0.78% 0.45% 1.06% 3.25% 5.80% RATIOS TO AVERAGE NET ASSETS: Expenses 0.73% 0.71%(1) 0.74%(1) 0.74%(1) 0.78% Net investment income 0.74% 0.43%(1) 1.03%(1) 3.14%(1) 5.61% SUPPLEMENTAL DATA: Net assets, end of period, in millions $ 1,123 $ 1,269 $ 1,340 $ 1,257 $ 1,243 </Table> - ---------- (1) IF THE FUND HAD BORNE ALL ITS EXPENSES THAT WERE REIMBURSED OR WAIVED BY THE INVESTMENT ADVISER, THE ANNUALIZED EXPENSE AND NET INVESTMENT INCOME RATIOS WOULD HAVE BEEN AS FOLLOWS: <Table> <Caption> EXPENSE NET INVESTMENT PERIOD ENDED RATIO INCOME RATIO ---------------- ------- -------------- JANUARY 31, 2004 0.71% 0.43% JANUARY 31, 2003 0.76% 1.01% JANUARY 31, 2002 0.81% 3.07% </Table> SEE NOTES TO FINANCIAL STATEMENTS 13 <Page> MORGAN STANLEY U.S. GOVERNMENT MONEY MARKET TRUST REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM TO THE SHAREHOLDERS AND BOARD OF TRUSTEES OF MORGAN STANLEY U.S. GOVERNMENT MONEY MARKET TRUST: We have audited the accompanying statement of assets and liabilities of Morgan Stanley U.S. Government Money Market Trust (the "Fund"), including the portfolio of investments, as of January 31, 2005, and the related statements of operations for the year then ended and changes in net assets for each of the two years in the period then ended, and the financial highlights for each of the five years in the period 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 the standards of the Public Company Accounting Oversight Board (United States). 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. The Fund is not required to have, nor were we engaged to perform, an audit of its internal controls over financial reporting. Our audit included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of January 31, 2005, by correspondence with the custodian and brokers. 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 Morgan Stanley U.S. Government Money Market Trust as of January 31, 2005, 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 the financial highlights for each of the five years in the period then ended, in conformity with accounting principles generally accepted in the United States of America. Deloitte & Touche LLP NEW YORK, NEW YORK MARCH 15, 2005 14 <Page> MORGAN STANLEY U.S. GOVERNMENT MONEY MARKET TRUST TRUSTEE AND OFFICER INFORMATION INDEPENDENT TRUSTEES: <Table> <Caption> NUMBER OF PORTFOLIOS TERM OF IN FUND POSITION(S) OFFICE AND COMPLEX NAME, AGE AND ADDRESS OF HELD WITH LENGTH OF PRINCIPAL OCCUPATION(S) DURING OVERSEEN OTHER DIRECTORSHIPS INDEPENDENT TRUSTEE REGISTRANT TIME SERVED* PAST 5 YEARS** BY TRUSTEE*** HELD BY TRUSTEE - --------------------------------------- ----------- ------------ ------------------------------ ------------- --------------------- Michael Bozic (64) Trustee Since Private Investor; Director or 208 None. c/o Kramer Levin Naftalis & Frankel LLP April 1994 Trustee of the Retail Funds Counsel to the Independent Trustees (since April 1994) and the 919 Third Avenue Institutional Funds (since New York, NY 10022-3902 July 2003); formerly Vice Chairman of Kmart Corporation (December 1998-October 2000), Chairman and Chief Executive Officer of Levitz Furniture Corporation (November 1995- November 1998) and President and Chief Executive Officer of Hills Department Stores (May 1991-July 1995); formerly variously Chairman, Chief Executive Officer, President and Chief Operating Officer (1987-1991) of the Sears Merchandise Group of Sears, Roebuck & Co. Edwin J. Garn (72) Trustee Since Consultant; Managing Director 208 Director of Franklin 1031 N. Chartwell Court January 1993 of Summit Ventures LLC; Covey (time Salt Lake City, UT 84103 Director or Trustee of the management systems), Retail Funds (since January BMW Bank of North 1993) and the Institutional America, Inc. Funds (since July 2003); (industrial loan member of the Utah Regional corporation), United Advisory Board of Pacific Space Alliance (joint Corp.; formerly Managing venture between Director of Summit Ventures Lockheed Martin and LLC (2000-2004); United States the Boeing Company) Senator (R-Utah) (1974-1992) and Nuskin Asia and Chairman, Senate Banking Pacific (multilevel Committee (1980-1986), Mayor marketing); member of of Salt Lake City, Utah the board of various (1971-1974), Astronaut, Space civic and charitable Shuttle Discovery (April organizations. 12-19, 1985), and Vice Chairman, Huntsman Corporation (chemical company). Wayne E. Hedien (70) Trustee Since Retired; Director or Trustee 208 Director of The PMI c/o Kramer Levin Naftalis & Frankel LLP September of the Retail Funds (since Group Inc. (private Counsel to the Independent Trustees 1997 September 1997) and the mortgage insurance); 919 Third Avenue Institutional Funds (since Trustee and Vice New York, NY 10022-3902 July 2003); formerly Chairman of The Field associated with the Allstate Museum of Natural Companies (1966-1994), most History; director of recently as Chairman of The various other Allstate Corporation (March business and 1993-December 1994) and charitable Chairman and Chief Executive organizations. Officer of its wholly-owned subsidiary, Allstate Insurance Company (July 1989-December 1994). </Table> 15 <Page> <Table> <Caption> NUMBER OF PORTFOLIOS TERM OF IN FUND POSITION(S) OFFICE AND COMPLEX NAME, AGE AND ADDRESS OF HELD WITH LENGTH OF PRINCIPAL OCCUPATION(S) DURING OVERSEEN OTHER DIRECTORSHIPS INDEPENDENT TRUSTEE REGISTRANT TIME SERVED* PAST 5 YEARS** BY TRUSTEE*** HELD BY TRUSTEE - --------------------------------------- ----------- ------------ ------------------------------ ------------- --------------------- Dr. Manuel H. Johnson (55) Trustee Since Senior Partner, Johnson Smick 208 Director of NVR, Inc. c/o Johnson Smick International, Inc. July 1991 International, Inc., a (home construction); 2099 Pennsylvania Avenue, N.W. consulting firm; Chairman of Director of KFX Suite 950 the Audit Committee and Energy; Director of Washington, D.C. 20006 Director or Trustee of the RBS Greenwich Capital Retail Funds (since July 1991) Holdings (financial and the Institutional Funds holding company). (since July 2003); Co-Chairman and a founder of the Group of Seven Council (G7C), an international economic commission; formerly Vice Chairman of the Board of Governors of the Federal Reserve System and Assistant Secretary of the U.S. Treasury. Joseph J. Kearns (62) Trustee Since President, Kearns & Associates 209 Director of Electro c/o Kearns & Associates LLC July 2003 LLC (investment consulting); Rent Corporation PMB754 Deputy Chairman of the Audit (equipment leasing), 23852 Pacific Coast Highway Committee and Director or The Ford Family Malibu, CA 90265 Trustee of the Retail Funds Foundation, and the (since July 2003) and the UCLA Foundation. Institutional Funds (since August 1994); previously Chairman of the Audit Committee of the Institutional Funds (October 2001-July 2003); formerly CFO of the J. Paul Getty Trust. Michael E. Nugent (68) Trustee Since General Partner of Triumph 208 Director of various c/o Triumph Capital, L.P. July 1991 Capital, L.P., a private business 445 Park Avenue investment partnership; organizations. New York, NY 10022 Chairman of the Insurance Committee and Director or Trustee of the Retail Funds (since July 1991) and the Institutional Funds (since July 2001); formerly Vice President, Bankers Trust Company and BT Capital Corporation (1984-1988). Fergus Reid (72) Trustee Since Chairman of Lumelite Plastics 209 Trustee and Director c/o Lumelite Plastics Corporation July 2003 Corporation; Chairman of the of certain investment 85 Charles Colman Blvd. Governance Committee and companies in the Pawling, NY 12564 Director or Trustee of the JPMorgan Funds Retail Funds (since July 2003) complex managed by and the Institutional Funds J.P. Morgan (since June 1992). Investment Management Inc. </Table> 16 <Page> INTERESTED TRUSTEES: <Table> <Caption> NUMBER OF PORTFOLIOS TERM OF IN FUND POSITION(S) OFFICE AND COMPLEX NAME, AGE AND ADDRESS OF HELD WITH LENGTH OF PRINCIPAL OCCUPATION(S) DURING OVERSEEN OTHER DIRECTORSHIPS INTERESTED TRUSTEE REGISTRANT TIME SERVED* PAST 5 YEARS** BY TRUSTEE*** HELD BY TRUSTEE - --------------------------------------- ----------- ------------ ------------------------------ ------------- --------------------- Charles A. Fiumefreddo (71) Chairman of Since Chairman and Director or 208 None. c/o Morgan Stanley Trust the Board July 1991 Trustee of the Retail Funds Harborside Financial Center, and Trustee (since July 1991) and the Plaza Two, Institutional Funds (since Jersey City, NJ 07311 July 2003); formerly Chief Executive Officer of the Retail Funds (until September 2002). James F. Higgins (56) Trustee Since Director or Trustee of the 208 Director of AXA c/o Morgan Stanley Trust June 2000 Retail Funds (since June 2000) Financial, Inc. and Harborside Financial Center, and the Institutional Funds The Equitable Life Plaza Two, (since July 2003); Senior Assurance Society of Jersey City, NJ 07311 Advisor of Morgan Stanley the United States (since August 2000); Director (financial services). of the Distributor and Dean Witter Realty Inc.; previously President and Chief Operating Officer of the Private Client Group of Morgan Stanley (May 1999-August 2000), and President and Chief Operating Officer of Individual Securities of Morgan Stanley (February 1997-May 1999). </Table> - ---------- * THIS IS THE EARLIEST DATE THE TRUSTEE BEGAN SERVING THE FUNDS ADVISED BY MORGAN STANLEY INVESTMENT ADVISORS INC. (THE "INVESTMENT ADVISER ") (THE "RETAIL FUNDS "). ** THE DATES REFERENCED BELOW INDICATING COMMENCEMENT OF SERVICES AS DIRECTOR/TRUSTEE FOR THE RETAIL FUNDS AND THE FUNDS ADVISED BY MORGAN STANLEY INVESTMENT MANAGEMENT INC. AND MORGAN STANLEY AIP GP LP (THE "INSTITUTIONAL FUNDS") REFLECT THE EARLIEST DATE THE DIRECTOR/TRUSTEE BEGAN SERVING THE RETAIL OR INSTITUTIONAL FUNDS AS APPLICABLE. *** THE FUND COMPLEX INCLUDES ALL OPEN-END AND CLOSED-END FUNDS (INCLUDING ALL OF THEIR PORTFOLIOS) ADVISED BY THE INVESTMENT ADVISER AND ANY FUNDS THAT HAVE AN INVESTMENT ADVISER THAT IS AN AFFILIATED PERSON OF THE INVESTMENT ADVISER (INCLUDING, BUT NOT LIMITED TO, MORGAN STANLEY INVESTMENT MANAGEMENT INC.). 17 <Page> OFFICERS: <Table> <Caption> TERM OF POSITION(S) OFFICE AND NAME, AGE AND ADDRESS OF HELD WITH LENGTH OF EXECUTIVE OFFICER REGISTRANT TIME SERVED* PRINCIPAL OCCUPATION(S) DURING PAST 5 YEARS** - ----------------------------- --------------- ---------------- ------------------------------------------------------------- Mitchell M. Merin (51) President Since May 1999 President and Chief Operating Officer of Morgan Stanley 1221 Avenue of the Americas Investment Management Inc.; President, Director and Chief New York, NY 10020 Executive Officer of the Investment Adviser and the Administrator; Chairman and Director of the Distributor; Chairman and Director of the Transfer Agent; Director of various Morgan Stanley subsidiaries; President of the Institutional Funds (since July 2003) and President of the Retail Funds; Trustee (since July 2003) and President (since December 2002) of the Van Kampen Closed-End Funds; Trustee and President (since October 2002) of the Van Kampen Open-End Funds. Ronald E. Robison (66) Executive Vice Since Principal Executive Officer of Funds in the Fund Complex 1221 Avenue of the Americas President and April 2003 (since May 2003); Managing Director of Morgan Stanley & Co. New York, NY 10020 Principal Incorporated, Morgan Stanley Investment Management Inc. and Executive Morgan Stanley; Managing Director, Chief Administrative Officer Officer and Director of the Investment Adviser and the Administrator; Director of the Transfer Agent; Managing Director and Director of the Distributor; Executive Vice President and Principal Executive Officer of the Institutional Funds (since July 2003) and the Retail Funds (since April 2003); Director of Morgan Stanley SICAV (since May 2004); previously President and Director of the Retail Funds (March 2001-July 2003) and Chief Global Operations Officer and Managing Director of Morgan Stanley Investment Management Inc. Joseph J. McAlinden (62) Vice President Since July 1995 Managing Director and Chief Investment Officer of the 1221 Avenue of the Americas Investment Adviser and Morgan Stanley Investment Management New York, NY 10020 Inc., Director of the Transfer Agent, Chief Investment Officer of the Van Kampen Funds; Vice President of the Institutional Funds (since July 2003) and the Retail Funds (since July 1995). Barry Fink (50) Vice President Since General Counsel (since May 2000) and Managing Director (since 1221 Avenue of the Americas February 1997 December 2000) of Morgan Stanley Investment Management; New York, NY 10020 Managing Director (since December 2000), Secretary (since February 1997) and Director of the Investment Adviser and the Administrator; Vice President of the Retail Funds; Assistant Secretary of Morgan Stanley DW; Vice President of the Institutional Funds (since July 2003); Managing Director, Secretary and Director of the Distributor; previously Secretary (February 1997-July 2003) and General Counsel (February 1997-April 2004) of the Retail Funds; Vice President and Assistant General Counsel of the Investment Adviser and the Administrator (February 1997-December 2001). Amy R. Doberman (42) Vice President Since July 2004 Managing Director and General Counsel, U.S. Investment 1221 Avenue of the Americas Management; Managing Director of Morgan Stanley Investment New York, NY 10020 Management Inc. and the Investment Adviser, Vice President of the Institutional and Retail Funds (since July 2004); Vice President of the Van Kampen Funds (since August 2004); previously, Managing Director and General Counsel - Americas, UBS Global Asset Management (July 2000 - July 2004) and General Counsel, Aeltus Investment Management, Inc. (January 1997 - July 2000). Carsten Otto (41) Chief Since October Executive Director and U.S. Director of Compliance for Morgan 1221 Avenue of the Americas Compliance 2004 Stanley Investment Management (since October 2004); Executive New York, NY 10020 Officer Director of the Investment Adviser and Morgan Stanley Investment Management Inc.; formerly Assistant Secretary and Assistant General Counsel of the Morgan Stanley Retail Funds. </Table> 18 <Page> <Table> <Caption> TERM OF POSITION(S) OFFICE AND NAME, AGE AND ADDRESS OF HELD WITH LENGTH OF EXECUTIVE OFFICER REGISTRANT TIME SERVED* PRINCIPAL OCCUPATION(S) DURING PAST 5 YEARS** - ----------------------------- --------------- ---------------- ------------------------------------------------------------- Stefanie V. Chang (38) Vice President Since July 2003 Executive Director of Morgan Stanley & Co. Incorporated, 1221 Avenue of the Americas Morgan Stanley Investment Management Inc., and the Investment New York, NY 10020 Adviser; Vice President of the Institutional Funds and the Retail Funds (since July 2003); formerly practiced law with the New York law firm of Rogers & Wells (now Clifford Chance US LLP). Francis J. Smith (39) Treasurer and Treasurer since Executive Director of the Investment Adviser and Morgan c/o Morgan Stanley Trust Chief Financial July 2003 and Stanley Services (since December 2001); previously, Vice Harborside Financial Center, Officer Chief Financial President of the Retail Funds (September 2002-July 2003), and Plaza Two, Officer since Vice President of the Investment Adviser and the Jersey City, NJ 07311 September 2002 Administrator (August 2000-November 2001) and Senior Manager at PricewaterhouseCoopers LLP (January 1998-August 2000). Thomas F. Caloia (58) Vice President Since July 2003 Executive Director (since December 2002) and Assistant c/o Morgan Stanley Trust Treasurer of the Investment Adviser, the Distributor and the Harborside Financial Center, Administrator; previously Treasurer of the Retail Funds Plaza Two, (April 1989-July 2003); formerly First Vice President of the Jersey City, NJ 07311 Investment Adviser, the Distributor and the Administrator. Mary E. Mullin (37) Secretary Since July 2003 Executive Director of Morgan Stanley & Co. Incorporated, 1221 Avenue of the Americas Morgan Stanley Investment Management Inc. and the Investment New York, NY 10020 Adviser; Secretary of the Institutional Funds and the Retail Funds (since July 2003); formerly practiced law with the New York law firms of McDermott, Will & Emery and Skadden, Arps, Slate, Meagher & Flom LLP. </Table> - ---------- * THIS IS THE EARLIEST DATE THE OFFICER BEGAN SERVING THE RETAIL FUNDS. EACH OFFICER SERVES AN INDEFINITE TERM, UNTIL HIS OR HER SUCCESSOR IS ELECTED. ** THE DATES REFERENCED BELOW INDICATING COMMENCEMENT OF SERVICE AS AN OFFICER FOR THE RETAIL AND INSTITUTIONAL FUNDS REFLECT THE EARLIEST DATE THE OFFICER BEGAN SERVING THE RETAIL OR INSTITUTIONAL FUNDS, AS APPLICABLE. 2005 FEDERAL TAX NOTICE (UNAUDITED) Of the Fund's ordinary income dividends paid during the fiscal year ended January 31, 2005, 52.80% was attributable to qualifying Federal obligations. Please consult your tax advisor to determine if any portion of the dividends you received is exempt from state income tax. 19 <Page> TRUSTEES Michael Bozic Charles A. Fiumefreddo Edwin J. Garn Wayne E. Hedien James F. Higgins Dr. Manuel H. Johnson Joseph J. Kearns Michael E. Nugent Fergus Reid OFFICERS Charles A. Fiumefreddo CHAIRMAN OF THE BOARD Mitchell M. Merin PRESIDENT Ronald E. Robison EXECUTIVE VICE PRESIDENT AND PRINCIPAL EXECUTIVE OFFICER Joseph J. McAlinden VICE PRESIDENT Barry Fink VICE PRESIDENT Amy R. Doberman VICE PRESIDENT Carsten Otto CHIEF COMPLIANCE OFFICER Stefanie V. Chang VICE PRESIDENT Francis J. Smith TREASURER AND CHIEF FINANCIAL OFFICER Thomas F. Caloia VICE PRESIDENT Mary E. Mullin SECRETARY TRANSFER AGENT Morgan Stanley Trust Harborside Financial Center, Plaza Two Jersey City, New Jersey 07311 INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM Deloitte & Touche LLP Two World Financial Center New York, New York 10281 INVESTMENT ADVISER Morgan Stanley Investment Advisors Inc. 1221 Avenue of the Americas New York, New York 10020 This report is submitted for the general information of the shareholders of the Fund. For more detailed information about the Fund, its fees and expenses and other pertinent information, please read its Prospectus. The Fund's Statement of Additional Information contains additional information about the Fund, including its trustees. It is available, without charge, by calling (800) 869-NEWS. This report is not authorized for distribution to prospective investors in the Fund unless preceded or accompanied by an effective Prospectus. Read the Prospectus carefully before investing. Investments and services offered through Morgan Stanley DW Inc., member SIPC. Morgan Stanley Distributors Inc., member NASD. (C) 2005 Morgan Stanley [MORGAN STANLEY LOGO] 37965RPT-RA05-00182P-Y01/05 [GRAPHIC] MORGAN STANLEY FUNDS MORGAN STANLEY U.S. GOVERNMENT MONEY MARKET TRUST ANNUAL REPORT JANUARY 31, 2005 [MORGAN STANLEY LOGO] <Page> Item 2. Code of Ethics. (a) The Fund has adopted a code of ethics (the "Code of Ethics") that applies to its 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 Fund or a third party. (b) No information need be disclosed pursuant to this paragraph. (c) The Fund has amended its Code of Ethics during the period covered by the shareholder report presented in Item 1 hereto to delete from the end of the following paragraph on page 2 of the Code the phrase "to the detriment of the Fund.": "Each Covered Officer must not use his personal influence or personal relationship improperly to influence investment decisions or financial reporting by the Fund whereby the Covered Officer would benefit personally (directly or indirectly)." (d) Not applicable. (e) Not applicable. (f) (1) The Fund's Code of Ethics is attached hereto as Exhibit A. (2) Not applicable. (3) Not applicable. Item 3. Audit Committee Financial Expert. The Fund's Board of Trustees has determined that it has two "audit committee financial experts" serving on its audit committee, each of whom are "independent" Trustees: Dr. Manuel H. Johnson and Joseph J. Kearns. Under applicable securities laws, a person who is determined to be an audit committee financial expert will not be deemed an "expert" for any purpose, including without limitation for the purposes of Section 11 of the Securities Act of 1933, as a result of being designated or identified as an audit committee financial expert. The designation or identification of a person as an audit committee financial expert does not impose on such person any duties, obligations, or liabilities that are greater than the duties, obligations, and liabilities imposed on such person as a member of the audit committee and Board of Trustees in the absence of such designation or identification. <Page> Item 4. Principal Accountant Fees and Services. (a)(b)(c)(d) and (g). Based on fees billed for the periods shown: 2005 <Table> <Caption> REGISTRANT COVERED ENTITIES(1) AUDIT FEES $ 24,546 N/A NON-AUDIT FEES AUDIT-RELATED FEES $ 452(2) $ 3,746,495(2) TAX FEES $ 4,877(3) $ 79,800(4) ALL OTHER FEES $ - $ - TOTAL NON-AUDIT FEES $ 5,329 $ 3,826,295 TOTAL $ 29,875 $ 3,826,295 </Table> 2004 <Table> <Caption> REGISTRANT COVERED ENTITIES(1) AUDIT FEES $ 23,689 N/A NON-AUDIT FEES AUDIT-RELATED FEES $ 684(2) $ 2,847,161(2) TAX FEES $ 4,757(3) $ 736,810(4) ALL OTHER FEES $ - $ -(5) TOTAL NON-AUDIT FEES $ 5,441 $ 3,583,971 TOTAL $ 29,130 $ 3,583,971 </Table> N/A- Not applicable, as not required by Item 4. (1) Covered Entities include the Adviser (excluding sub-advisors) and any entity controlling, controlled by or under common control with the Adviser that provides ongoing services to the Registrant. (2) Audit-Related Fees represent assurance and related services provided that are reasonably related to the performance of the audit of the financial statements of the Covered Entities' and funds advised by the Adviser or its affiliates, specifically data verification and agreed-upon procedures related to asset securitizations and agreed-upon procedures engagements. (3) Tax Fees represent tax compliance, tax planning and tax advice services provided in connection with the preparation and review of the Registrant's tax returns. (4) Tax Fees represent tax compliance, tax planning and tax advice services provided in connection with the review of Covered Entities' tax returns. (5) All other fees represent project management for future business applications and improving business and operational processes. <Page> (e)(1) The audit committee's pre-approval policies and procedures are as follows: APPENDIX A AUDIT COMMITTEE AUDIT AND NON-AUDIT SERVICES PRE-APPROVAL POLICY AND PROCEDURES OF THE MORGAN STANLEY RETAIL AND INSTITUTIONAL FUNDS AS ADOPTED AND AMENDED JULY 23, 2004,(1) 1. STATEMENT OF PRINCIPLES The Audit Committee of the Board is required to review and, in its sole discretion, pre-approve all Covered Services to be provided by the Independent Auditors to the Fund and Covered Entities in order to assure that services performed by the Independent Auditors do not impair the auditor's independence from the Fund. The SEC has issued rules specifying the types of services that an independent auditor may not provide to its audit client, as well as the audit committee's administration of the engagement of the independent auditor. The SEC's rules establish two different approaches to pre-approving services, which the SEC considers to be equally valid. Proposed services either: may be pre-approved without consideration of specific case-by-case services by the Audit Committee ("GENERAL PRE-APPROVAL"); or require the specific pre-approval of the Audit Committee or its delegate ("SPECIFIC PRE-APPROVAL"). The Audit Committee believes that the combination of these two approaches in this Policy will result in an effective and efficient procedure to pre-approve services performed by the Independent Auditors. As set forth in this Policy, unless a type of service has received general pre-approval, it will require specific pre-approval by the Audit Committee (or by any member of the Audit Committee to which pre-approval authority has been delegated) if it is to be provided by the Independent Auditors. Any proposed services exceeding pre-approved cost levels or budgeted amounts will also require specific pre-approval by the Audit Committee. The appendices to this Policy describe the Audit, Audit-related, Tax and All Other services that have the general pre-approval of the Audit Committee. The term of any general pre-approval is 12 months from the date of pre-approval, unless the Audit Committee considers and provides a different period and states otherwise. The Audit Committee will annually review and pre-approve the services that may be provided by the Independent Auditors without obtaining specific pre-approval from the Audit Committee. The Audit Committee will add to or subtract from the list of general pre-approved services from time to time, based on subsequent determinations. - ---------- (1) This Audit Committee Audit and Non-Audit Services Pre-Approval Policy and Procedures (the "POLICY"), adopted as of the date above, supersedes and replaces all prior versions that may have been adopted from time to time. <Page> The purpose of this Policy is to set forth the policy and procedures by which the Audit Committee intends to fulfill its responsibilities. It does not delegate the Audit Committee's responsibilities to pre-approve services performed by the Independent Auditors to management. The Fund's Independent Auditors have reviewed this Policy and believes that implementation of the Policy will not adversely affect the Independent Auditors' independence. 2. DELEGATION As provided in the Act and the SEC's rules, the Audit Committee may delegate either type of pre-approval authority to one or more of its members. The member to whom such authority is delegated must report, for informational purposes only, any pre-approval decisions to the Audit Committee at its next scheduled meeting. 3. AUDIT SERVICES The annual Audit services engagement terms and fees are subject to the specific pre-approval of the Audit Committee. Audit services include the annual financial statement audit and other procedures required to be performed by the Independent Auditors to be able to form an opinion on the Fund's financial statements. These other procedures include information systems and procedural reviews and testing performed in order to understand and place reliance on the systems of internal control, and consultations relating to the audit. The Audit Committee will approve, if necessary, any changes in terms, conditions and fees resulting from changes in audit scope, Fund structure or other items. In addition to the annual Audit services engagement approved by the Audit Committee, the Audit Committee may grant general pre-approval to other Audit services, which are those services that only the Independent Auditors reasonably can provide. Other Audit services may include statutory audits and services associated with SEC registration statements (on Forms N-1A, N-2, N-3, N-4, etc.), periodic reports and other documents filed with the SEC or other documents issued in connection with securities offerings. The Audit Committee has pre-approved the Audit services in Appendix B.1. All other Audit services not listed in Appendix B.1 must be specifically pre-approved by the Audit Committee (or by any member of the Audit Committee to which pre-approval has been delegated). 4. AUDIT-RELATED SERVICES Audit-related services are assurance and related services that are reasonably related to the performance of the audit or review of the Fund's financial statements and, to the extent they are Covered Services, the Covered Entities or that are traditionally performed by the Independent Auditors. Because the Audit Committee believes that the provision of Audit-related services does not impair the independence of the auditor and is consistent with the SEC's rules on auditor independence, the Audit Committee may grant general pre-approval to Audit-related services. Audit-related services include, among others, accounting consultations related to accounting, financial reporting or disclosure matters <Page> not classified as "Audit services"; assistance with understanding and implementing new accounting and financial reporting guidance from rulemaking authorities; agreed-upon or expanded audit procedures related to accounting and/or billing records required to respond to or comply with financial, accounting or regulatory reporting matters; and assistance with internal control reporting requirements under Forms N-SAR and/or N-CSR. The Audit Committee has pre-approved the Audit-related services in Appendix B.2. All other Audit-related services not listed in Appendix B.2 must be specifically pre-approved by the Audit Committee (or by any member of the Audit Committee to which pre-approval has been delegated). 5. TAX SERVICES The Audit Committee believes that the Independent Auditors can provide Tax services to the Fund and, to the extent they are Covered Services, the Covered Entities, such as tax compliance, tax planning and tax advice without impairing the auditor's independence, and the SEC has stated that the Independent Auditors may provide such services. Pursuant to the preceding paragraph, the Audit Committee has pre-approved the Tax Services in Appendix B.3. All Tax services in Appendix B.3 must be specifically pre-approved by the Audit Committee (or by any member of the Audit Committee to which pre-approval has been delegated). 6. ALL OTHER SERVICES The Audit Committee believes, based on the SEC's rules prohibiting the Independent Auditors from providing specific non-audit services, that other types of non-audit services are permitted. Accordingly, the Audit Committee believes it may grant general pre-approval to those permissible non-audit services classified as All Other services that it believes are routine and recurring services, would not impair the independence of the auditor and are consistent with the SEC's rules on auditor independence. The Audit Committee has pre-approved the All Other services in Appendix B.4. Permissible All Other services not listed in Appendix B.4 must be specifically pre-approved by the Audit Committee (or by any member of the Audit Committee to which pre-approval has been delegated). 7. PRE-APPROVAL FEE LEVELS OR BUDGETED AMOUNTS Pre-approval fee levels or budgeted amounts for all services to be provided by the Independent Auditors will be established annually by the Audit Committee. Any proposed services exceeding these levels or amounts will require specific pre-approval by the Audit Committee. The Audit Committee is mindful of the overall relationship of fees for audit and non-audit services in determining whether to pre-approve any such services. 8. PROCEDURES All requests or applications for services to be provided by the Independent Auditors that do not require specific approval by the Audit Committee will be submitted to the Fund's Chief Financial Officer and must include a detailed description of the services to be <Page> rendered. The Fund's Chief Financial Officer will determine whether such services are included within the list of services that have received the general pre-approval of the Audit Committee. The Audit Committee will be informed on a timely basis of any such services rendered by the Independent Auditors. Requests or applications to provide services that require specific approval by the Audit Committee will be submitted to the Audit Committee by both the Independent Auditors and the Fund's Chief Financial Officer, and must include a joint statement as to whether, in their view, the request or application is consistent with the SEC's rules on auditor independence. The Audit Committee has designated the Fund's Chief Financial Officer to monitor the performance of all services provided by the Independent Auditors and to determine whether such services are in compliance with this Policy. The Fund's Chief Financial Officer will report to the Audit Committee on a periodic basis on the results of its monitoring. Both the Fund's Chief Financial Officer and management will immediately report to the chairman of the Audit Committee any breach of this Policy that comes to the attention of the Fund's Chief Financial Officer or any member of management. 9. ADDITIONAL REQUIREMENTS The Audit Committee has determined to take additional measures on an annual basis to meet its responsibility to oversee the work of the Independent Auditors and to assure the auditor's independence from the Fund, such as reviewing a formal written statement from the Independent Auditors delineating all relationships between the Independent Auditors and the Fund, consistent with Independence Standards Board No. 1, and discussing with the Independent Auditors its methods and procedures for ensuring independence. 10. COVERED ENTITIES Covered Entities include the Fund's investment adviser(s) and any entity controlling, controlled by or under common control with the Fund's investment adviser(s) that provides ongoing services to the Fund(s). Beginning with non-audit service contracts entered into on or after May 6, 2003, the Fund's audit committee must pre-approve non-audit services provided not only to the Fund but also to the Covered Entities if the engagements relate directly to the operations and financial reporting of the Fund. This list of Covered Entities would include: MORGAN STANLEY RETAIL FUNDS Morgan Stanley Investment Advisors Inc. Morgan Stanley & Co. Incorporated Morgan Stanley DW Inc. Morgan Stanley Investment Management Inc. Morgan Stanley Investment Management Limited Morgan Stanley Investment Management Private Limited Morgan Stanley Asset & Investment Trust Management Co., Limited Morgan Stanley Investment Management Company Van Kampen Asset Management Morgan Stanley Services Company, Inc. Morgan Stanley Distributors Inc. Morgan Stanley Trust FSB <Page> MORGAN STANLEY INSTITUTIONAL FUNDS Morgan Stanley Investment Management Inc. Morgan Stanley Investment Advisors Inc. Morgan Stanley Investment Management Limited Morgan Stanley Investment Management Private Limited Morgan Stanley Asset & Investment Trust Management Co., Limited Morgan Stanley Investment Management Company Morgan Stanley & Co. Incorporated Morgan Stanley Distribution, Inc. Morgan Stanley AIP GP LP Morgan Stanley Alternative Investment Partners LP (e)(2) Beginning with non-audit service contracts entered into on or after May 6, 2003, the audit committee also is required to pre-approve services to Covered Entities to the extent that the services are determined to have a direct impact on the operations or financial reporting of the Registrant. 100% of such services were pre-approved by the audit committee pursuant to the Audit Committee's pre-approval policies and procedures (attached hereto). (f) Not applicable. (g) See table above. (h) The audit committee of the Board of Trustees has considered whether the provision of services other than audit services performed by the auditors to the Registrant and Covered Entities is compatible with maintaining the auditors' independence in performing audit services. Item 5. Audit Committee of Listed Registrants. (a) The Fund has a separately-designated standing audit committee established in accordance with Section 3(a)(58)(A) of the Exchange Act whose members are: Michael Bozic, Edwin J. Garn, Wayne E. Hedien, Manual H. Johnson, Joseph J. Kearns, Michael Nugent and Fergus Reid. (b) Not applicable. Item 6. Schedule of Investments Refer to Item 1. <Page> Item 7. Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies. Applicable only to reports filed by closed-end funds. Item 8. Portfolio Managers of Closed-End Management Investment Companies Applicable only to reports filed by closed-end funds. Item 9. Closed-End Fund Repurchases Applicable only to reports filed by closed-end funds. Item 10. Submission of Matters to a Vote of Security Holders Not applicable. Item 11. Controls and Procedures (a) The Fund's principal executive officer and principal financial officer have concluded that the Fund's disclosure controls and procedures are sufficient to ensure that information required to be disclosed by the Fund in this Form N-CSR was recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms, based upon such officers' evaluation of these controls and procedures as of a date within 90 days of the filing date of the report. (b) There were no changes in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal half-year (the registrant's second fiscal half-year in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting. Item 12. Exhibits (a) The Code of Ethics for Principal Executive and Senior Financial Officers is attached hereto. (b) A separate certification for each principal executive officer and principal financial officer of the registrant are attached hereto as part of EX-99.CERT. <Page> SIGNATURES 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. Morgan Stanley U.S. Government Money Market Trust /s/ Ronald E. Robison Ronald E. Robison Principal Executive Officer March 22, 2005 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed by the following persons on behalf of the registrant and in the capacities and on the dates indicated. /s/ Ronald E. Robison Ronald E. Robison Principal Executive Officer March 22, 2005 /s/ Francis Smith Francis Smith Principal Financial Officer March 22, 2005