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 811-8211 Dreyfus Institutional Preferred Money Market Funds - Dreyfus Institutional Preferred Money Market Fund - Dreyfus Institutional Preferred Plus Money Market Fund (Exact name of Registrant as specified in charter) c/o The Dreyfus Corporation 200 Park Avenue New York, New York 10166 (Address of principal executive offices) (Zip code) Mark N. Jacobs, Esq. 200 Park Avenue New York, New York 10166 (Name and address of agent for service) Registrant's telephone number, including area code: (212) 922-6000 Date of fiscal year end: 3/31 Date of reporting period: 9/30/03 FORM N-CSR ITEM 1. REPORTS TO STOCKHOLDERS. Dreyfus Institutional Preferred Money Market Fund SEMIANNUAL REPORT September 30, 2003 YOU, YOUR ADVISOR AND DREYFUS A MELLON FINANCIAL COMPANY(SM) The views expressed in this report reflect those of the portfolio manager only through the end of the period covered and do not necessarily represent the views of Dreyfus or any other person in the Dreyfus organization. Any such views are subject to change at any time based upon market or other conditions and Dreyfus disclaims any responsibility to update such views. These views may not be relied on as investment advice and, because investment decisions for a Dreyfus fund are based on numerous factors, may not be relied on as an indication of trading intent on behalf of any Dreyfus fund. Not FDIC-Insured * Not Bank-Guaranteed * May Lose Value Contents THE FUND - -------------------------------------------------- 2 Letter to Shareholders 5 Statement of Investments 9 Statement of Assets and Liabilities 10 Statement of Operations 11 Statement of Changes in Net Assets 12 Financial Highlights 13 Notes to Financial Statements FOR MORE INFORMATION - --------------------------------------------------------------------------- Back Cover The Fund Dreyfus Institutional Preferred Money Market Fund LETTER TO SHAREHOLDERS Dear Shareholder: We are pleased to present this semiannual report for Dreyfus Institutional Preferred Money Market Fund for the six-month period ended September 30, 2003. During the reporting period, the fund produced an annualized yield of 1.10% which, taking into account the effects of compounding, also created an annualized effective yield of 1.10% .(1) THE ECONOMY The U.S. economy continued to struggle when the reporting period began, as evidenced by the first quarter of 2003's annualized GDP growth rate of just 1.4%. Previous hopes of a more robust economic rebound faded as mounting war fears caused consumer confidence to fall to new lows. In fact, at its March meeting just before the start of the reporting period, the Federal Reserve Board (the "Fed") indicated that uncertainty regarding the war with Iraq was so great that it could not adequately assess prevailing economic risks. Investors soon became more optimistic when it became clear in early April that major combat in Iraq would be over quickly. Yields on money market securities began to rise at the longer end of the curve as investors' attention returned to the prospects for the U.S. economy. In May, the economy began to show signs of sustainable improvement. A key purchasing index rose significantly, suggesting better conditions in the manufacturing sector, and consumer confidence rebounded. These encouraging signs were supported by gains in the stock market, low inflation, moderating oil prices, rising productivity and legislation enacting new tax cuts. However, at its meeting in early May, the Fed adopted a relatively cautious stance, saying economic risks were "weighted toward weakness over the foreseeable future." Economic indicators continued to improve in June, including stronger consumer confidence and robust home sales. It was later estimated that U.S. GDP expanded at a higher than expected 3.3% annualized rate for the second quarter of 2003. Unfortunately, the unemployment rate climbed to 6.4%, its highest level in nine years, suggesting the impending recovery might be slow in creating jobs. Because of the remote possibility that deflationary forces might derail a potential economic recovery, most investors expected the Fed to reduce interest rates further at its meeting in late June. The Fed did not disappoint them, lowering the federal funds rate another 25 basis points to 1%. However, because the Fed did not cut rates by 50 basis points as some investors had expected, yields rose in the wake of the Fed's announcement. The ISM Manufacturing Index expanded in July, rising to a point that most analysts consider to be an indicator of economic expansion. In fact, signs of impending economic strength created a sudden shift in investor sentiment amid concerns that higher mortgage rates might constrain consumer spending and stall the economic recovery. As a result, prices of longer-term bonds plunged in July and early August, producing one of the most severe six-week declines in the history of the bond market. A rising supply of U.S. Treasury securities issued to fund the widening federal budget deficit also put downward pressure on prices. Although heightened volatility roiled the longer-term bond markets, short-term yields remained steady, anchored by the 1% federal funds rate. The economy continued to send mixed signals in August and September. On one hand, it became clearer that business investment and consumer spending was rebounding, even as inflation remained well under control. Jobless claims dropped in September to their The Fund LETTER TO SHAREHOLDERS (CONTINUED) lowest level in eight months, and sales at department stores rose more than expected as consumers spent their tax refunds. On the other hand, consumer sentiment declined toward the end of the reporting period, and new data suggested that businesses still were not confident that the economic recovery is sustainable. In our view, the lack of convincing evidence of a sustainable surge in economic activity makes it likely that the Fed will keep short-term interest rates at current levels for the foreseeable future. Indeed, although it recently acknowledged the upturn in the economy, the Fed has repeatedly reaffirmed its commitment to keeping short-term interest rates at the benchmark rate of 1% MARKET ENVIRONMENT/PORTFOLIO FOCUS The recent economic improvement has led to a steepening of the yield curve and, as has been the case for some time now, we generally have maintained the fund's weighted average maturity toward the long end of its range. This strategy is designed to capture higher yields at the longer end of the curve. We are prepared to adjust our strategies as economic and market conditions evolve. /s/PATRICIA A. LARKIN Patricia A. Larkin Senior Portfolio Manager October 15, 2003 New York, N.Y. (1) ANNUALIZED EFFECTIVE YIELD IS BASED UPON DIVIDENDS DECLARED DAILY AND REINVESTED MONTHLY. PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. YIELDS FLUCTUATE. AN INVESTMENT IN THE FUND IS NOT INSURED OR GUARANTEED BY THE FDIC OR THE U.S. GOVERNMENT. ALTHOUGH THE FUND SEEKS TO PRESERVE THE VALUE OF YOUR INVESTMENT AT $1.00 PER SHARE, IT IS POSSIBLE TO LOSE MONEY BY INVESTING IN THE FUND. STATEMENT OF INVESTMENTS September 30, 2003 (Unaudited) Principal NEGOTIABLE BANK CERTIFICATES OF DEPOSIT--27.2% Amount ($) Value ($) - ------------------------------------------------------------------------------------------------------------------------------------ BNP Paribas (London) 1.04%, 12/15/2003 75,000,000 74,998,426 BNP Paribas (Yankee) 1.05%--1.06%, 3/10/2004--6/7/2004 350,000,000 (a) 349,975,065 Barclays Bank PLC (Yankee) 1.04%, 12/22/2003 150,000,000 150,000,000 Credit Agricole Indosuez S.A. (Yankee) 1.05%, 10/22/2003 200,000,000 (a) 200,000,000 HBOS Treasury Services PLC (London) 1.04%, 1/16/2004 175,000,000 175,005,172 ING Bank N.V. (London) 1.05%, 1/7/2004 155,000,000 155,000,000 KBC Bank N.V. (Yankee) 1.05%, 1/5/2004 100,000,000 100,000,000 Landesbank Hessen-Thuringen Girozentrale (London) 1.04%, 1/5/2004 250,000,000 250,000,000 Natexis Banques Populares (Yankee) 1.08%, 12/12/2003 300,000,000 299,997,008 Nordea Bank Finland PLC (Yankee) 1.06%, 1/14/2004 200,000,000 (a) 200,000,000 Swedbank (Yankee) 1.09%, 1/21/2004--1/22/2004 240,000,000 (a) 239,996,253 UniCredito Italiano SpA (London) 1.04%, 10/14/2003 150,000,000 150,000,270 Wells Fargo Bank N.A. 1.06%, 10/16/2003 243,000,000 243,000,000 Westdeutsche Landesbank Girozentrale (Yankee) 1.07%--1.08%, 3/8/2004--10/4/2004 450,000,000 (a) 449,954,310 TOTAL NEGOTIABLE BANK CERTIFICATES OF DEPOSIT (cost $3,037,926,504) 3,037,926,504 COMMERCIAL PAPER--22.0% - ------------------------------------------------------------------------------------------------------------------------------------ Citigroup Global Markets Holdings Inc. 1.06%, 11/7/2003 200,000,000 199,782,110 Depfa Bank PLC 1.04%, 10/3/2003 97,000,000 96,994,423 The Fund STATEMENT OF INVESTMENTS (Unaudited) (CONTINUED) Principal COMMERCIAL PAPER (CONTINUED) Amount ($) Value ($) - ------------------------------------------------------------------------------------------------------------------------------------ Deutsche Bank Financial Inc. 1.15%, 10/1/2003 200,000,000 200,000,000 FCAR Owner Trust 1.01%--1.03%, 10/7/2003--12/9/2003 233,258,000 233,043,457 General Electric Capital Corp. 1.04%--1.12%, 10/7/2003--12/12/2003 550,000,000 549,341,111 General Electric Capital Services Inc. 1.04%--1.06%, 11/12/2003--12/12/2003 100,000,000 99,834,167 Hamburgische Landesbank Girozentrale 1.26%, 10/31/2003 200,000,000 199,791,667 J.P. Morgan Chase & Co. 1.10%, 1/22/2004 300,000,000 298,964,167 Natexis Banques Populaires 1.03%, 10/17/2003 100,000,000 99,954,222 Svenska Handelsbanken Inc. 1.03%, 10/1/2003 290,000,000 290,000,000 UBS Finance Delaware LLC 1.11%, 10/1/2003 200,000,000 200,000,000 TOTAL COMMERCIAL PAPER (cost $2,467,705,324) 2,467,705,324 PROMISSORY NOTES--1.3% - ------------------------------------------------------------------------------------------------------------------------------------ Goldman Sachs Group Inc. 1.82%--1.95%, 10/10/2003--10/15/2003 (cost $150,000,000) 150,000,000 (b) 150,000,000 - ------------------------------------------------------------------------------------------------------------------------------------ SHORT-TERM BANK NOTES--7.6% - ------------------------------------------------------------------------------------------------------------------------------------ BNP Paribas 1.06%, 6/16/2004 50,000,000 (a) 49,992,867 Bank One N.A. 1.05%, 1/12/2004 300,000,000 (a) 299,995,765 National City Bank 1.45%, 11/10/2003 100,000,000 100,001,095 National City Bank 1.06%, 1/20/2004 300,000,000 (a) 300,003,083 Principal SHORT-TERM BANK NOTES (CONTINUED) Amount ($) Value ($) - ------------------------------------------------------------------------------------------------------------------------------------ Rabobank Nederland 1.05%, 1/23/2004 100,000,000 (a) 99,996,087 TOTAL SHORT-TERM BANK NOTES (cost $849,988,897) 849,988,897 U.S. GOVERNMENT AGENCIES--13.4% - ------------------------------------------------------------------------------------------------------------------------------------ Federal Home Loan Mortgage Corporation, Discount Notes 1.06%--1.14%, 11/14/2003--3/1/2004 300,000,000 299,011,000 Federal National Mortgage Association, Discount Notes 1.05%--1.08%, 12/17/2003--12/31/2003 400,000,000 398,992,625 Federal National Mortgage Association, Floating Rate Notes 1.01%, 6/17/2004 100,000,000 (a) 99,978,488 Federal National Mortgage Association, Notes 1.15%--1.42%, 7/27/2004--9/3/2004 700,000,000 700,000,000 TOTAL U.S. GOVERNMENT AGENCIES (cost $1,497,982,113) 1,497,982,113 TIME DEPOSITS--31.1% - ------------------------------------------------------------------------------------------------------------------------------------ Branch Banking & Trust Co. (Grand Cayman) 1.09%, 10/1/2003 300,000,000 300,000,000 Dexia Bank Belgium (Grand Cayman) 1.09%, 10/1/2003 250,000,000 250,000,000 Fifth Third Bank (Grand Cayman) 1.09%, 10/1/2003 400,000,000 400,000,000 Fortis Bank (Grand Cayman) 1.15%, 10/1/2003 400,000,000 400,000,000 HSBC Bank USA (Grand Cayman) 1.13%, 10/1/2003 200,000,000 200,000,000 M&T Bank (Grand Cayman) 1.09%, 10/1/2003 200,000,000 200,000,000 Rabobank Nederland (Grand Cayman) 1.13%, 10/1/2003 350,000,000 350,000,000 The Fund STATEMENT OF INVESTMENTS (Unaudited) (CONTINUED) Principal TIME DEPOSITS (CONTINUED) Amount ($) Value ($) - ------------------------------------------------------------------------------------------------------------------------------------ Regions Bank (Grand Cayman) 1.06%, 10/1/2003 450,000,000 450,000,000 Societe Generale (Grand Cayman) 1.13%, 10/1/2003 450,000,000 450,000,000 South Trust Bank (Grand Cayman) 1.06%, 10/1/2003 200,000,000 200,000,000 Sun Trust Bank (Grand Cayman) 1.13%, 10/1/2003 285,000,000 285,000,000 TOTAL TIME DEPOSITS (cost $3,485,000,000) 3,485,000,000 - ------------------------------------------------------------------------------------------------------------------------------------ TOTAL INVESTMENTS (cost $11,488,602,838) 102.6% 11,488,602,838 LIABILITIES, LESS CASH AND RECEIVABLES (2.6%) (291,120,010) NET ASSETS 100.0% 11,197,482,828 (A) VARIABLE INTEREST RATE--SUBJECT TO PERIODIC CHANGE. (B) THESE NOTES WERE ACQUIRED FOR INVESTMENT, NOT WITH THE INTENT TO DISTRIBUTE OR SELL. SECURITIES RESTRICTED AS TO PUBLIC RESALE. THESE SECURITIES WERE ACQUIRED BETWEEN 10/15/2002 AND 10/16/2002 AT A COST OF $150,000,000. AT SEPTEMBER 30, 2003, THE AGGREGATE VALUE OF THESE SECURITIES WERE $150,000,000 REPRESENTING 1.3% OF NET ASSETS AND IS VALUED AT AMORTIZED COST. SEE NOTES TO FINANCIAL STATEMENTS. STATEMENT OF ASSETS AND LIABILITIES September 30, 2003 (Unaudited) Cost Value - -------------------------------------------------------------------------------- ASSETS ($): Investments in securities--See Statement of Investments 11,488,602,838 11,488,602,838 Interest receivable 12,145,574 11,500,748,412 LIABILITIES ($): Due to The Dreyfus Corporation and affiliates 933,830 Payable for investment securities purchased 299,954,310 Cash overdraft due to Custodian 2,180,808 Payable for shares of Beneficial Interest redeemed 196,636 303,265,584 NET ASSETS ($) 11,197,482,828 COMPOSITION OF NET ASSETS ($): Paid-in capital 11,197,506,393 Accumulated net realized gain (loss) on investments (23,565) NET ASSETS ($) 11,197,482,828 SHARES OUTSTANDING (unlimited number of $.001 par value shares of Beneficial Interest authorized) 11,197,506,393 NET ASSET VALUE, offering and redemption price per share ($) 1.00 SEE NOTES TO FINANCIAL STATEMENTS. The Fund STATEMENT OF OPERATIONS Six Months Ended September 30, 2003 (Unaudited) - -------------------------------------------------------------------------------- INVESTMENT INCOME ($): INTEREST INCOME 65,623,478 EXPENSES: MANAGEMENT FEE--NOTE 2(A) 5,496,271 INVESTMENT INCOME--NET 60,127,207 NET REALIZED GAIN (LOSS) ON INVESTMENTS--NOTE 1(B) ($) (30,702) NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS 60,096,505 SEE NOTES TO FINANCIAL STATEMENTS. STATEMENT OF CHANGES IN NET ASSETS Six Months Ended September 30, 2003 Year Ended (Unaudited) March 31, 2003 - -------------------------------------------------------------------------------- OPERATIONS ($): Investment income--net 60,127,207 173,999,067 Net realized gain (loss) from investments (30,702) 8,312 NET INCREASE (DECREASE) IN NET ASSETS RESULTING FROM OPERATIONS 60,096,505 174,007,379 DIVIDENDS TO SHAREHOLDERS FROM ($): INVESTMENT INCOME--NET (60,127,207) (173,999,067) BENEFICIAL INTEREST TRANSACTIONS ($1.00 per share): Net proceeds from shares sold 25,349,426,783 63,655,207,111 Dividends reinvested 43,807,359 123,402,479 Cost of shares redeemed (23,780,474,093) (63,998,635,536) INCREASE (DECREASE) IN NET ASSETS FROM BENEFICIAL INTEREST TRANSACTIONS 1,612,760,049 (220,025,946) TOTAL INCREASE (DECREASE) IN NET ASSETS 1,612,729,347 (220,017,634) - -------------------------------------------------------------------------------- NET ASSETS ($): Beginning of Period 9,584,753,481 9,804,771,115 END OF PERIOD 11,197,482,828 9,584,753,481 SEE NOTES TO FINANCIAL STATEMENTS. The Fund FINANCIAL HIGHLIGHTS The following table describes the performance for the fiscal periods indicated. Total return shows how much your investment in the fund would have increased (or decreased) during each period, assuming you had reinvested all dividends and distributions. These figures have been derived from the fund's financial statements. Six Months Ended Year Ended March 31, September 30, 2003 ------------------------------------------------------------------------------- (Unaudited) 2003 2002 2001 2000 1999 - ------------------------------------------------------------------------------------------------------------------------------------ PER SHARE DATA ($): Net asset value, beginning of period 1.00 1.00 1.00 1.00 1.00 1.00 Investment Operations: Investment income--net .006 .017 .033 .063 .054 .053 Distributions: Dividends from investment income--net (.006) (.017) (.033) (.063) (.054) (.053) Net asset value, end of period 1.00 1.00 1.00 1.00 1.00 1.00 - ------------------------------------------------------------------------------------------------------------------------------------ TOTAL RETURN (%) 1.10(a) 1.67 3.30 6.51 5.48 5.48 - ------------------------------------------------------------------------------------------------------------------------------------ RATIOS/ SUPPLEMENTAL DATA (%): Ratio of expenses to average net assets .10(a) .10 .10 .10 .10 .10 Ratio of net investment income to average net assets 1.09(a) 1.65 3.23 6.28 5.43 5.31 - ------------------------------------------------------------------------------------------------------------------------------------ Net Assets, end of period ($ x 1,000) 11,197,483 9,584,753 9,804,771 8,854,953 4,430,839 1,999,406 (A) ANNUALIZED. SEE NOTES TO FINANCIAL STATEMENTS. NOTES TO FINANCIAL STATEMENTS (Unaudited) NOTE 1--SIGNIFICANT ACCOUNTING POLICIES: Dreyfus Institutional Preferred Money Market Fund (the "fund") is a separate diversified series of Dreyfus Institutional Preferred Money Market Funds (the "Company"), which is registered under the Investment Company Act of 1940, as amended (the "Act"), as an open-end management investment company and operates as a series company currently offering two series, including the fund. The fund's investment objective is to provide investors with as high a level of current income as is consistent with the preservation of capital and the maintenance of liquidity. The Dreyfus Corporation (the "Manager") serves as the fund's investment adviser. The Manager is a wholly-owned subsidiary of Mellon Bank, N.A., which is a wholly-owned subsidiary of Mellon Financial Corporation. Dreyfus Service Corporation (the "Distributor"), a wholly-owned subsidiary of the Manager, is the distributor of the fund's shares, which are sold to the public without a sales charge. The Company accounts separately for the assets, liabilities and operations of each series. Expenses directly attributable to each series are charged to that series' operations; expenses which are applicable to all series are allocated among them on a pro rata basis. It is the fund's policy to maintain a continuous net asset value per share of $1.00; the fund has adopted certain investment, portfolio valuation and dividend and distribution policies to enable it to do so. There is no assurance, however, that the fund will be able to maintain a stable net asset value per share of $1.00. The fund's financial statements are prepared in accordance with accounting principles generally accepted in the United States, which may require the use of management estimates and assumptions. Actual results could differ from those estimates. (A) PORTFOLIO VALUATION: Investments in securities are valued at amortized cost in accordance with Rule 2a-7 of the Act, which has been determined by the fund's Board of Trustees to represent the fair value of the fund's investments. The Fund NOTES TO FINANCIAL STATEMENTS (Unaudited) (CONTINUED) (B) SECURITIES TRANSACTIONS AND INVESTMENT INCOME: Securities transactions are recorded on a trade date basis. Realized gain and loss from securities transactions are recorded on the identified cost basis. Interest income, adjusted for amortization of discount and premium on investments, is earned from settlement date and recognized on the accrual basis. Cost of investments represents amortized cost. Under the terms of the custody agreement, the fund received net earnings credits of $27,887 during the period ended September 30, 2003, based on available cash balances left on deposit. Income earned under this arrangement is included in interest income. (C) DIVIDENDS TO SHAREHOLDERS: It is the policy of the fund to declare dividends daily from investment income-net on each business day. Such dividends are paid monthly. Dividends from net realized capital gain, if any, are normally declared and paid annually, but the fund may make distributions on a more frequent basis to comply with the distribution requirements of the Internal Revenue Code of 1986, as amended (the "Code"). To the extent that a net realized capital gain can be offset by capital loss carryovers, if any, it is the policy of the fund not to distribute such gain. (D) FEDERAL INCOME TAXES: It is the policy of the fund to continue to qualify as a regulated investment company, if such qualification is in the best interests of its shareholders, by complying with the applicable provisions of the Code, and to make distributions of taxable income sufficient to relieve it from substantially all federal income and excise taxes. The tax character of distributions paid to shareholders during the fiscal year ended March 31, 2003 was all ordinary income. The tax character of current year distributions will be determined at the end of the current fiscal year. At September 30, 2003, the cost of investments for federal income tax purposes was substantially the same as the cost for financial reporting purposes (see the Statement of Investments). NOTE 2--MANAGEMENT FEE AND OTHER TRANSACTIONS WITH AFFILIATES: (a) Pursuant to a management agreement with the Manager, the management fee is computed at the annual rate of .10 of 1% of the value of the fund's average daily net assets and is payable monthly. The Manager has agreed to pay all of the fund' s expenses except the management fee, taxes, interest, brokerage fees and commissions and extraordinary expenses. (b) Each Board member also serves as a Board member of other funds within the Dreyfus complex (collectively, the "Fund Group"). Each Board member who was not an "affiliated person" as defined in the Act received an annual fee of $60,000, an attendance fee of $7,500 for each in-person meeting. The Chairman of the Board receives an additional 25% of such compensation. Subject to the Company's Emeritus Program Guidelines, Emeritus Board members, if any, receive 50% of the annual retainer fee and per meeting fee paid at the time the Board member achieves emeritus status. These fees are allocated among the funds in the Fund Group in proportion to each fund's relative net assets. The Fund NOTES For More Information DREYFUS INSTITUTIONAL PREFERRED MONEY MARKET FUND 200 Park Avenue New York, NY 10166 MANAGER The Dreyfus Corporation 200 Park Avenue New York, NY 10166 CUSTODIAN The Bank of New York 100 Church Street New York, NY 10286 TRANSFER AGENT & DIVIDEND DISBURSING AGENT Dreyfus Transfer, Inc. 200 Park Avenue New York, NY 10166 DISTRIBUTOR Dreyfus Service Corporation 200 Park Avenue New York, NY 10166 To obtain information: BY TELEPHONE Call 1-800-645-6561 BY MAIL Write to: The Dreyfus Family of Funds 144 Glenn Curtiss Boulevard Uniondale, NY 11556-0144 BY E-MAIL Send your request to info@dreyfus.com ON THE INTERNET Information can be viewed online or downloaded from: http://www.dreyfus.com (c) 2003 Dreyfus Service Corporation 194SA0903 Dreyfus Institutional Preferred Plus Money Market Fund SEMIANNUAL REPORT September 30, 2003 YOU, YOUR ADVISOR AND DREYFUS A MELLON FINANCIAL COMPANY(SM) The views expressed in this report reflect those of the portfolio manager only through the end of the period covered and do not necessarily represent the views of Dreyfus or any other person in the Dreyfus organization. Any such views are subject to change at any time based upon market or other conditions and Dreyfus disclaims any responsibility to update such views. These views may not be relied on as investment advice and, because investment decisions for a Dreyfus fund are based on numerous factors, may not be relied on as an indication of trading intent on behalf of any Dreyfus fund. Not FDIC-Insured * Not Bank-Guaranteed * May Lose Value Contents THE FUND - -------------------------------------------------- 2 Letter to Shareholders 5 Statement of Investments 6 Statement of Assets and Liabilities 7 Statement of Operations 8 Statement of Changes in Net Assets 9 Financial Highlights 10 Notes to Financial Statements FOR MORE INFORMATION - --------------------------------------------------------------------------- Back Cover The Fund Dreyfus Institutional Preferred Plus Money Market Fund LETTER TO SHAREHOLDERS Dear Shareholder: We are pleased to present this semiannual report for Dreyfus Institutional Preferred Plus Money Market Fund for the six-month period ended September 30, 2003. During the reporting period, the fund produced an annualized yield of 1.14% which, taking into account the effects of compounding, created an annualized effective yield of 1.15% .(1) THE ECONOMY The U.S. economy continued to struggle when the reporting period began, as evidenced by the first quarter of 2003's annualized GDP growth rate of just 1.4%. Previous hopes of a more robust economic rebound faded as mounting war fears caused consumer confidence to fall to new lows. In fact, at its March meeting just before the start of the reporting period, the Federal Reserve Board (the " Fed") indicated that uncertainty regarding the war with Iraq was so great that it could not adequately assess prevailing economic risks. Investors soon became more optimistic when it became clear in early April that major combat in Iraq would be over quickly. Yields on money market securities began to rise at the longer end of the curve as investors' attention returned to the prospects for the U.S. economy. In May, the economy began to show signs of sustainable improvement. A key purchasing index rose significantly, suggesting better conditions in the manufacturing sector, and consumer confidence rebounded. These encouraging signs were supported by gains in the stock market, low inflation, moderating oil prices, rising productivity and legislation enacting new tax cuts. However, at its meeting in early May, the Fed adopted a relatively cautious stance, saying economic risks were "weighted toward weakness over the foreseeable future." Economic indicators continued to improve in June, including stronger consumer confidence and robust home sales. It was later estimated that U.S. GDP expanded at a higher than expected 3.3% annualized rate for the second quarter of 2003. Unfortunately, the unemployment rate climbed to 6.4%, its highest level in nine years, suggesting that the impending recovery might be slow in creating jobs. Because of the remote possibility that deflationary forces might derail a potential economic recovery, most investors expected the Fed to reduce interest rates further at its meeting in late June. The Fed did not disappoint them, lowering the federal funds rate another 25 basis points to 1%. However, because the Fed did not cut rates by 50 basis points as some investors had expected, yields rose in the wake of the Fed's announcement. The ISM Manufacturing Index expanded in July, rising to a point that most analysts consider to be an indicator of economic expansion. In fact, signs of impending economic strength created a sudden shift in investor sentiment amid concerns that higher mortgage rates might constrain consumer spending and stall the economic recovery. As a result, prices of longer-term bonds plunged in July and early August, producing one of the most severe six-week declines in the history of the bond market. A rising supply of U.S. Treasury securities issued to fund the widening federal budget deficit also put downward pressure on prices. Although heightened volatility roiled the longer-term bond markets, short-term yields remained steady, anchored by the 1% federal funds rate. The economy continued to send mixed signals in August and September. On one hand, it became clearer that business investment and consumer spending was rebounding, even as inflation remained well under control. Jobless claims dropped in September to their lowest level in eight months, and sales at department stores rose more The Fund LETTER TO SHAREHOLDERS (CONTINUED) than expected as consumers spent their tax refunds. On the other hand, consumer sentiment declined toward the end of the reporting period, and new data suggested that businesses still were not confident that the economic recovery is sustainable. In our view, the lack of convincing evidence of a sustainable surge in economic activity makes it likely that the Fed will keep short-term interest rates at current levels for the foreseeable future. Indeed, although it recently acknowledged the upturn in the economy, the Fed has repeatedly reaffirmed its commitment to keeping short-term interest rates at the benchmark rate of 1% Market Environment/Portfolio Focus As has been the case for some time now, we generally have maintained the fund's weighted average maturity toward the shorter end of its range. We are prepared to adjust our strategies as economic and market conditions evolve. /S/PATRICIA A. LARKIN Patricia A. Larkin Senior Portfolio Manager October 15, 2003 New York, N.Y. (1) ANNUALIZED EFFECTIVE YIELD IS BASED UPON DIVIDENDS DECLARED DAILY AND REINVESTED MONTHLY. PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. YIELDS FLUCTUATE. AN INVESTMENT IN THE FUND IS NOT INSURED OR GUARANTEED BY THE FDIC OR THE U.S. GOVERNMENT. ALTHOUGH THE FUND SEEKS TO PRESERVE THE VALUE OF YOUR INVESTMENT AT $1.00 PER SHARE, IT IS POSSIBLE TO LOSE MONEY BY INVESTING IN THE FUND. YIELD PROVIDED REFLECTS THE ABSORPTION OF FUND EXPENSES BY THE DREYFUS CORPORATION PURSUANT TO AN UNDERTAKING IN EFFECT THAT MAY BE EXTENDED, TERMINATED OR MODIFIED AT ANY TIME. HAD THESE EXPENSES NOT BEEN ABSORBED, THE FUND'S YIELD WOULD HAVE BEEN LOWER. STATEMENT OF INVESTMENTS September 30, 2003 (Unaudited) Principal NEGOTIABLE BANK CERTIFICATES OF DEPOSIT--14.9% Amount ($) Value ($) - ------------------------------------------------------------------------------------------------------------------------------------ ING Bank N.V. (London) 1.04%, 10/15/2003 10,000,000 10,000,000 Natexis Banques Populaires (Yankee) 1.06%, 10/21/2003 5,000,000 5,000,000 Toronto-Dominion Bank (Yankee) 1.11%, 1/20/2004 5,000,000 4,999,999 TOTAL NEGOTIABLE BANK CERTIFICATES OF DEPOSIT (cost $19,999,999) 19,999,999 - ------------------------------------------------------------------------------------------------------------------------------------ COMMERCIAL PAPER--11.2% CBA (Delaware) Finance Inc. 1.06%, 10/15/2003 5,000,000 4,997,939 HBOS Treasury Services PLC 1.07%, 11/20/2003 5,000,000 4,992,569 Nordea North America Inc. 1.07%, 10/2/2003 5,000,000 4,999,852 TOTAL COMMERCIAL PAPER (cost $14,990,360) 14,990,360 - ------------------------------------------------------------------------------------------------------------------------------------ PROMISSORY NOTES--7.4% Goldman Sachs Group Inc. 1.70%, 11/24/2003 (cost $10,000,000) 10,000,000 (a) 10,000,000 - ------------------------------------------------------------------------------------------------------------------------------------ U.S. GOVERNMENT AGENCIES--66.4% Federal Home Loan Banks, Discount Notes 1.00%, 10/1/2003 79,161,000 79,161,000 Federal Home Loan Mortgage Corp., Discount Notes 1.08%, 11/20/2003 10,000,000 9,985,070 TOTAL U.S. GOVERNMENT AGENCIES (cost $89,146,070) 89,146,070 - ------------------------------------------------------------------------------------------------------------------------------------ TOTAL INVESTMENTS (cost $134,136,429) 99.9% 134,136,429 CASH AND RECEIVABLES (NET) .1% 81,901 NET ASSETS 100.0% 134,218,330 (A) THESE NOTES WERE ACQUIRED FOR INVESTMENT, AND NOT WITH THE INTENT TO DISTRIBUTE OR SELL. SECURITIES RESTRICTED AS TO PUBLIC RESALE. THESE SECURITIES WERE ACQUIRED ON 11/24/2002 AT A COST OF $10,000,000. AT SEPTEMBER 30, 2003, THE AGGREGATE VALUE OF THESE SECURITIES WERE $10,000,000 REPRESENTING 7.4% OF NET ASSETS AND ARE VALUED AT AMORTIZED COST. SEE NOTES TO FINANCIAL STATEMENTS. The Fund STATEMENT OF ASSETS AND LIABILITIES September 30, 2003 (Unaudited) Cost Value - -------------------------------------------------------------------------------- ASSETS ($): Investments in securities--See Statement of Investments 134,136,429 134,136,429 Interest receivable 191,504 134,327,933 - -------------------------------------------------------------------------------- LIABILITIES ($): Cash overdraft due to Custodian 109,603 - -------------------------------------------------------------------------------- NET ASSETS ($) 134,218,330 - -------------------------------------------------------------------------------- COMPOSITION OF NET ASSETS ($): Paid-in capital 134,222,740 Accumulated net realized gain (loss) on investments (4,410) - -------------------------------------------------------------------------------- NET ASSETS ($) 134,218,330 - -------------------------------------------------------------------------------- SHARES OUTSTANDING (unlimited number of $.001 par value shares of Beneficial Interest authorized) 134,222,740 NET ASSET VALUE, offering and redemption price per share ($) 1.00 SEE NOTES TO FINANCIAL STATEMENTS. STATEMENT OF OPERATIONS Six Months Ended September 30, 2003 (Unaudited) - -------------------------------------------------------------------------------- INVESTMENT INCOME ($): INTEREST INCOME 1,400,895 EXPENSES: MANAGEMENT FEE--NOTE 2(A) 120,326 Less--reduction in management fee due to undertaking--Note 2(a) (120,326) NET EXPENSES -- INVESTMENT INCOME--NET 1,400,895 - -------------------------------------------------------------------------------- REALIZED GAIN (LOSS) ON INVESTMENTS--NOTE 1(B) ($) (627) NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS 1,400,268 SEE NOTES TO FINANCIAL STATEMENTS. The Fund STATEMENT OF CHANGES IN NET ASSETS Six Months Ended September 30, 2003 Year Ended (Unaudited) March 31, 2003 - -------------------------------------------------------------------------------- OPERATIONS ($): Investment income--net 1,400,895 2,925,670 Net realized gain (loss) from investments (627) (3,783) NET INCREASE (DECREASE) IN NET ASSETS RESULTING FROM OPERATIONS 1,400,268 2,921,887 - -------------------------------------------------------------------------------- DIVIDENDS TO SHAREHOLDERS FROM ($): INVESTMENT INCOME--NET (1,400,895) (2,925,670) - -------------------------------------------------------------------------------- BENEFICIAL INTEREST TRANSACTIONS ($1.00 per share): Net proceeds from shares sold 2,256,625,333 3,094,866,292 Dividends reinvested 618 1,788 Cost of shares redeemed (2,354,784,336) (2,862,592,881) INCREASE (DECREASE) IN NET ASSETS FROM BENEFICIAL INTEREST TRANSACTIONS (98,158,385) 232,275,199 TOTAL INCREASE (DECREASE) IN NET ASSETS (98,159,012) 232,271,416 - -------------------------------------------------------------------------------- NET ASSETS ($): Beginning of Period 232,377,342 105,926 END OF PERIOD 134,218,330 232,377,342 SEE NOTES TO FINANCIAL STATEMENTS. FINANCIAL HIGHLIGHTS The following table describes the performance for the fiscal periods indicated. Total return shows how much your investment in the fund would have increased (or decreased) during each period, assuming you had reinvested all dividends and distributions. These figures have been derived from the fund's financial statements. Six Months Ended Year Ended March 31, September 30, 2003 ---------------------------------------- (Unaudited) 2003 2002 2001(a) - ------------------------------------------------------------------------------------------------------------------------------------ PER SHARE DATA ($): Net asset value, beginning of period 1.00 1.00 1.00 1.00 Investment Operations: Investment income--net .006 .016 .030 .027 Distributions: Dividends from investment income--net (.006) (.016) (.030) (.027) Net asset value, end of period 1.00 1.00 1.00 1.00 - ------------------------------------------------------------------------------------------------------------------------------------ TOTAL RETURN (%) 1.14(b) 1.59 3.08 6.11(b) - ------------------------------------------------------------------------------------------------------------------------------------ RATIOS/SUPPLEMENTAL DATA (%): Ratio of expenses to average net assets -- .00(c) .10 .10(b) Ratio of net investment income to average net assets 1.16(b) 1.45 2.96 6.04(b) Decrease reflected in above expense ratios due to undertakings by The Dreyfus Corporation .10(b) .10 -- -- - ------------------------------------------------------------------------------------------------------------------------------------ Net Assets, end of period ($ x 1,000) 134,218 232,377 106 103 (A) FROM OCTOBER 16, 2000 (COMMENCEMENT OF OPERATIONS) TO MARCH 31, 2001. (B) ANNUALIZED. (C) AMOUNT REPRESENTS LESS THAN .01%. SEE NOTES TO FINANCIAL STATEMENTS. The Fund NOTES TO FINANCIAL STATEMENTS (Unaudited) NOTE 1--SIGNIFICANT ACCOUNTING POLICIES: Dreyfus Institutional Preferred Plus Money Market Fund (the "fund") is a separate diversified series of Dreyfus Institutional Preferred Money Market Funds (the "Company"), which is registered under the Investment Company Act of 1940, as amended (the "Act"), as an open-end management investment company and operates as a series company currently offering two series, including the fund. The fund's investment objective is to provide investors with as high a level of current income as is consistent with the preservation of capital and the maintenance of liquidity. The fund serves as an investment vehicle for certain other Dreyfus funds as well as for other institutional investors. At September 30, 2003, 100% of the fund' s outstanding shares were held by other Dreyfus funds. The Dreyfus Corporation (the "Manager") serves as the fund's investment adviser. The Manager is a wholly-owned subsidiary of Mellon Bank, N.A., which is a wholly-owned subsidiary of Mellon Financial Corporation. Dreyfus Service Corporation (the "Distributor"), a wholly-owned subsidiary of the Manager, is the distributor of the fund's shares, which are sold to the public without a sales charge. The Company accounts separately for the assets, liabilities and operations of each series. Expenses directly attributable to each series are charged to that series' operations; expenses which are applicable to all series are allocated among them on a pro rata basis. It is the fund's policy to maintain a continuous net asset value per share of $1.00; the fund has adopted certain investment, portfolio valuation and dividend and distribution policies to enable it to do so. There is no assurance, however, that the fund will be able to maintain a stable net asset value per share of $1.00. The fund' s financial statements are prepared in accordance with accounting principles generally accepted in the United States, which may require the use of management estimates and assumptions. Actual results could differ from those estimates. (A) PORTFOLIO VALUATION: Investments in securities are valued at amortized cost in accordance with Rule 2a-7 of the Act, which has been determined by the fund's Board of Trustees to represent the fair value of the fund's investments. (B) SECURITIES TRANSACTIONS AND INVESTMENT INCOME: Securities transactions are recorded on a trade date basis. Realized gain and loss from securities transactions are recorded on the identified cost basis. Interest income, adjusted for amortization of discount and premium on investments, is earned from settlement date and recognized on the accrual basis. Cost of investments represents amortized cost. Under the terms of the custody agreement, the fund received net earnings credits of $14,189 during the period ended September 30, 2003, based on available cash balances left on deposit. Income earned under this arrangement is included in interest income. (C) DIVIDENDS TO SHAREHOLDERS: It is the policy of the fund to declare dividends daily from investment income-net on each business day. Such dividends are paid monthly. Dividends from net realized capital gain, if any, are normally declared and paid annually, but the fund may make distributions on a more frequent basis to comply with the distribution requirements of the Internal Revenue Code of 1986, as amended (the "Code"). To the extent that a net realized capital gain can be offset by capital loss carryovers, if any, it is the policy of the fund not to distribute such gain. (D) FEDERAL INCOME TAXES: It is the policy of the fund to continue to qualify as a regulated investment company, if such qualification is in the best interests of its shareholders, by complying with the applicable provisions of the Code, and to make distributions of taxable income sufficient to relieve it from substantially all federal income and excise taxes. The fund has an unused capital loss carryover of $3,783 available for federal income tax purposes to be applied against future net securities profits, if any, realized subsequent to March 31, 2003. If not applied, the carryover expires in fiscal 2011. The Fund NOTES TO FINANCIAL STATEMENTS (Unaudited) (CONTINUED) The tax character of distributions paid to shareholders during the fiscal year ended March 31, 2003 was all ordinary income. The tax character of current year distributions will be determined at the end of the current fiscal year. At September 30, 2003, the cost of investments for federal income tax purposes was substantially the same as the cost for financial reporting purposes (see the Statement of Investments). NOTE 2--MANAGEMENT FEE AND OTHER TRANSACTIONS WITH AFFILIATES: (A) Pursuant to a management agreement with the Manager, the management fee is computed at the annual rate of .10 of 1% of the value of the fund's average daily net assets and is payable monthly. The Manager has agreed to pay all of the fund' s expenses except the management fee, taxes, interest, brokerage fee and commissions and extraordinary expenses. The Manager had undertaken from April 1, 2003 through September 30, 2003 to waive its management fee. The reduction in management fee, pursuant to the undertaking, amounted to $120,326 during the period ended September 30, 2003. (B) Each Board member also serves as a Board member of other funds within the Dreyfus complex (collectively, the "Fund Group"). Each Board member who was not an "affiliated person" as defined in the Act received an annual fee of $60,000, an attendance fee of $7,500 for each in-person meeting. The Chairman of the Board receives an additional 25% of such compensation. Subject to the Company's Emeritus Program Guidelines, Emeritus Board members, if any, receive 50% of the annual retainer fee and per meeting fee paid at the time the Board member achieves emeritus status. These fees are allocated among the funds in the Fund Group in proportion to each fund's relative net assets. For More Information DREYFUS INSTITUTIONAL PREFERRED PLUS MONEY MARKET FUND 200 Park Avenue New York, NY 10166 MANAGER The Dreyfus Corporation 200 Park Avenue New York, NY 10166 CUSTODIAN The Bank of New York 100 Church Street New York, NY 10286 TRANSFER AGENT & Dividend Disbursing Agent Dreyfus Transfer, Inc. 200 Park Avenue New York, NY 10166 DISTRIBUTOR Dreyfus Service Corporation 200 Park Avenue New York, NY 10166 To obtain information: BY TELEPHONE Call 1-800-645-6561 BY MAIL Write to: The Dreyfus Family of Funds 144 Glenn Curtiss Boulevard Uniondale, NY 11556-0144 BY E-MAIL Send your request to info@dreyfus.com ON THE INTERNET Information can be viewed online or downloaded from: http://www.dreyfus.com (c) 2003 Dreyfus Service Corporation 286SA0903 ITEM 2. CODE OF ETHICS. Not applicable. ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. Not applicable. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. Not applicable. ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS. Not applicable. ITEM 6. [RESERVED] ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES. Not applicable. ITEM 8. [RESERVED] ITEM 9. CONTROLS AND PROCEDURES. (a) The Registrant's principal executive and principal financial officers have concluded, based on their evaluation of the Registrant's disclosure controls and procedures as of a date within 90 days of the filing date of this report, that the Registrant's disclosure controls and procedures are reasonably designed to ensure that information required to be disclosed by the Registrant on Form N-CSR is recorded, processed, summarized and reported within the required time periods and that information required to be disclosed by the Registrant in the reports that it files or submits on Form N-CSR is accumulated and communicated to the Registrant's management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure. (b) There were no changes to the Registrant's internal control over financial reporting that occurred during the Registrant's most recently ended fiscal half-year that has materially affected, or is reasonably likely to materially affect, the Registrant's internal control over financial reporting. ITEM 10. EXHIBITS. (a)(1) Not applicable. (a)(2) Certifications of principal executive and principal financial officers as required by Rule 30a-2(a) under the Investment Company Act of 1940. (b) Certification of principal executive and principal financial officers as required by Rule 30a-2(b) under the Investment Company Act of 1940. 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. Dreyfus Institutional Preferred Money Market Funds - - Dreyfus Institutional Preferred Money Market Fund - - Dreyfus Institutional Preferred Plus Money Market Fund By: /s/ Stephen E. Canter --------------------- Stephen E. Canter President Date: November 21, 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/ Stephen E. Canter --------------------- Chief Executive Officer Date: November 21, 2003 By: /s/ James Windels ----------------- James Windels Chief Financial Officer Date: November 21, 2003 EXHIBIT INDEX (a)(2) Certifications of principal executive and principal financial officers as required by Rule 30a-2(a) under the Investment Company Act of 1940. (EX-99.CERT) (b) Certification of principal executive and principal financial officers as required by Rule 30a-2(b) under the Investment Company Act of 1940. (EX-99.906CERT)