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 811-06196 811-21298 Name of Fund: CMA Treasury Fund Master Treasury Trust Fund Address: P.O. Box 9011 Princeton, NJ 08543-9011 Name and address of agent for service: Robert C. Doll, Jr., Chief Executive Officer, CMA Treasury Fund and Master Treasury Trust, 800 Scudders Mill Road, Plainsboro, NJ, 08536. Mailing address: P.O. Box 9011, Princeton, NJ, 08543-9011 Registrant's telephone number, including area code: (609) 282-2800 Date of fiscal year end: 03/31/06 Date of reporting period: 04/01/05 - 03/31/06 Item 1 - Report to Stockholders Annual Report March 31, 2006 CMA Treasury Fund (BULL LOGO) Merrill Lynch Investment Managers www.mlim.ml.com Mercury Advisors A Division of Merrill Lynch Investment Managers www.mercury.ml.com This report is not authorized for use as an offer of sale or a solicitation of an offer to buy shares of the Fund unless accompanied or preceded by the Fund's current prospectus. 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. Past performance results shown in this report should not be considered a representation of future performance, which will fluctuate. Refer to www.mlim.ml.com to obtain performance data current to the most recent month-end. Statements and other information herein are as dated and are subject to change. A description of the policies and procedures that the Fund uses to determine how to vote proxies relating to portfolio securities is available (1) without charge, upon request, by calling toll-free 1-800-637-3863; (2) at www.mutualfunds.ml.com; and (3) on the Securities and Exchange Commission's Web site at http://www.sec.gov. Information about how the Fund voted proxies relating to securities held in the Fund's portfolio during the most recent 12-month period ended June 30 is available (1) at www.mutualfunds.ml.com and (2) on the Securities and Exchange Commission's Web site at http://www.sec.gov. CMA Treasury Fund Box 9011 Princeton, NJ 08543-9011 (GO PAPERLESS LOGO) It's Fast, Convenient, & Timely! To sign up today, go to www.icsdelivery.com/live. CMA Treasury Fund Announcement to Shareholders On February 15, 2006, BlackRock, Inc. ("BlackRock") and Merrill Lynch & Co., Inc. ("Merrill Lynch") entered into an agreement to contribute Merrill Lynch's investment management business, Merrill Lynch Investment Managers, L.P. and certain affiliates (including Fund Asset Management, L.P. and Merrill Lynch Investment Managers International Limited), to BlackRock to create a new independent company that will be one of the world's largest asset management firms with over $1 trillion in assets under management (based on combined assets under management as of March 31, 2006). The transaction is expected to close in the third quarter of 2006, at which time the new company will operate under the BlackRock name. If approved by the Fund's Board of Trustees and Fund shareholders, the combined company that results from the transaction is expected to become the investment adviser of the Fund. Important Tax Information Of the ordinary income distributions paid by CMA Treasury Fund during the year ended March 31, 2006, 98.65% was attributable to federal obligations. Additionally, at least 50% of the assets of the Fund was invested in federal obligations at the end of each fiscal quarter. The law varies in each state as to whether and what percentage of dividend income attributable to federal obligations is exempt from state income tax. We recommend that you consult your tax adviser to determine if any portion of the dividends you received is exempt from state income taxes. The following information is provided with respect to the ordinary income distributions paid by CMA Treasury Fund for the fiscal year ended March 31, 2006: Interest-Related Dividends for Non-U.S. Residents Month Paid: April 2005 - December 2005 99.25%* January 2006 - March 2006 97.38%* Qualified Short-Term Capital Gains for Non-U.S. Residents Month Paid: April 2005 - December 2005 0.39%* * Represents the portion of the taxable ordinary income dividends eligible for exemption from U.S. withholding tax for nonresident aliens and foreign corporations. Availability of Quarterly Schedule of Investments The Fund files its complete schedule of portfolio holdings with the Securities and Exchange Commission ("SEC") for the first and third quarters of each fiscal year on Form N-Q. The Fund's Forms N-Q are available on the SEC's Web site at http://www.sec.gov. The Fund's Forms N-Q may also be reviewed and copied at the SEC's Public Reference Room in Washington, DC. Information on the operation of the Public Reference Room may be obtained by calling 1-800-SEC-0330. Electronic Delivery The Fund offers electronic delivery of communications to its shareholders. In order to receive this service, you must register your account and provide us with e-mail information. To sign up for this service, simply access this Web site at http://www.icsdelivery.com/live and follow the instructions. When you visit this site, you will obtain a personal identification number (PIN). You will need this PIN should you wish to update your e-mail address, choose to discontinue this service and/or make any other changes to the service. This service is not available for certain retirement accounts at this time. CMA TREASURY FUND MARCH 31, 2006 A Letter From the President Dear Shareholder You may be aware that changes are on the horizon at Merrill Lynch Investment Managers ("MLIM"). On February 15, 2006, Merrill Lynch announced plans to combine the firm's investment advisory business, including MLIM, with another highly regarded investment manager - BlackRock, Inc. ("BlackRock"). We believe this merger of asset management strength will benefit our investors. MLIM is a leading investment management organization with over $576 billion in assets under management globally and 2,757 employees in 17 countries. It offers over 100 investment strategies in vehicles ranging from mutual funds to institutional portfolios. BlackRock is one of the largest publicly traded investment management firms in the United States with $463.1 billion in assets under management and 1,839 employees. It manages assets on behalf of institutional and individual investors worldwide through a variety of equity, fixed income, liquidity and alternative investment products. At the completion of the transaction, which is expected in the third quarter of this year, the resultant firm will be a top-10 investment manager worldwide with over $1 trillion in assets under management.* The combined company will provide a wider selection of high-quality investment solutions across a range of asset classes and investment styles. MLIM and BlackRock possess complementary capabilities that together create a well-rounded organization uniting some of the finest money managers in the industry. At the same time, the firms share similar values and beliefs - they are focused on delivering excellence on behalf of clients, and both make investment performance their single most important mission. In short, the merger only reinforces our commitment to shareholders. Most of MLIM's investment products - including mutual funds, separately managed accounts, annuities and variable insurance funds - eventually will carry the "BlackRock" name. As a shareholder in one or more MLIM-advised mutual funds, you will receive a proxy package in the coming weeks in connection with this transaction. After you receive this information, should you have any questions or concerns, do not hesitate to contact your financial advisor. As always, we thank you for entrusting us with your investment assets, and we look forward to continuing to serve your investment needs with even greater strength and scale as the new BlackRock. Sincerely, (Robert C. Doll, Jr.) Robert C. Doll, Jr. President and Chief Investment Officer Merrill Lynch Investment Managers * $1.039 trillion in assets under management as of March 31, 2006. Data, including assets under management, are as of March 31, 2006. CMA TREASURY FUND MARCH 31, 2006 A Discussion With Your Fund's Portfolio Manager We maintained a relatively conservative approach as the Federal Reserve Board continued raising interest rates and the supply of short-term Treasury issues declined. How did the Fund perform during the fiscal year in light of the existing market conditions? For the 12-month period ended March 31, 2006, CMA Treasury Fund paid shareholders a net annualized dividend of 2.77%. For the six-month period ended March 31, 2006, the Fund paid shareholders a net annualized dividend of 3.29%. The Fund's seven-day yield as of March 31, 2006 was 3.73%. The Fund's average portfolio maturity at March 31, 2006 was 35 days. This compared to 60 days at September 30, 2005 and 48 days at March 31, 2005. We employed a barbell strategy for some time, but were not inclined toward that approach during the past year. Our appetite for longer-dated securities waned as it became apparent that the Federal Reserve Board (the Fed) was not through with its interest rate-hiking campaign. Under these circumstances, our goal was to capture the greatest relative value that the market had to offer at a particular point in time. The Fed advanced its monetary tightening campaign with eight quarter-point interest rate hikes during the 12-month period. This brought the federal funds rate to 4.75% by period-end. The central bank - focused on combating inflationary fears as energy prices moved higher - continued to raise interest rates despite the untold economic damage wrought by the summer hurricanes. In October, Dr. Ben Bernanke was named as the future replacement of longtime Fed Chairman Alan Greenspan, and investors began to anticipate that perhaps the measured interest rate-hiking campaign would soon come to an end. Although investors did remove the critical word "measured" from the description of its monetary tightening program, Bernanke's official induction in January was accompanied by a quarter-point interest rate hike, followed by another on March 28. Many observers predict that the Fed will tighten again at its meeting in May. In terms of supply, issuance of short-dated Treasury bills during the period was lower than one year ago. Recently, the U.S. Treasury's focus has been on the issuance of longer-dated securities, particularly with the reissuance of the 30-year Treasury bond in February. The Treasury had stopped issuing the long bond in 2001. The limited supply on the short end meant that prices were at times elevated. Finally, it is worth commenting on the shape of the Treasury yield curve. After flattening dramatically during the course of the Fed's interest rate- hiking campaign, the curve toyed with intermittent bouts of inversion throughout the early months of 2006. At March 31, 2006, the curve was relatively flat, with the six-month Treasury bill yielding 4.81%, while the two-year Treasury note, the 10-year Treasury note and the 30-year Treasury bond yielded 4.82%, 4.86% and 4.90%, respectively. How did you manage the portfolio during the fiscal year? The Fund's average portfolio maturity reached a high of 65 days and a low of 35 days during the year. As the Fed tirelessly advanced its monetary tightening policy, we were reluctant to pursue longer-dated money market issues and focused primarily on capturing the greatest relative value at the short end of the Treasury curve. This meant evaluating yields available in the one-, three- and six-month sectors in an effort to enhance income and total return potential within a fairly conservative framework. We also remained cognizant of supply issues that intermittently caused prices on one-month bills to become expensive. While we generally wanted to avoid locking into longer securities as interest rates steadily rose, we did selectively participate in the nine-month to one- year sectors as yield-enhancement opportunities presented themselves. Notably, we were able to take advantage of opportunities in these sectors in November and December, when the market began to speculate that perhaps the Fed was nearing the end of its interest rate-hiking campaign. We reverted back to a more conservative approach shortly after Dr. Bernanke assumed the role of Fed Chairman and monetary tightening moved forward uninterrupted. CMA TREASURY FUND MARCH 31, 2006 As is customary at calendar year-end, the Fund received heavy inflows as investors shifted assets to Treasury funds for year-end tax advantages. Thus, we began to target maturities in January and February, avoiding issues maturing in December. Much of the new money was redeemed in January, so our strategy in the final quarter of the fiscal year involved carefully managing amid the asset flows in and out of the portfolio. How would you characterize the portfolio's position at the close of the period? We maintained ample liquidity at period-end and would characterize our position as cautiously optimistic. We believe the end of the Fed's tightening cycle is within sight, perhaps toward summer, which could eventually give us cause to become more aggressive. Overall, the housing market still shows signs of decline, fears of increasing gasoline prices still loom for summer travelers, and the market has yet to see the type of explosive employment growth that would accompany projected 5% gross domestic product growth in the first quarter. All of these variables have been reflected in a decline in consumer confidence. On the supply side, record U.S. deficits are expected to translate into increased debt issuance, although we believe most of the supply will continue to be skewed toward the long end. We anticipate that some of the Treasury's needs will be met by higher tax receipts both on the corporate and individual levels. However, if the economy slows, resulting in a downturn in tax receipts, we would expect front-end issuance to increase. Under these conditions, we intend to maintain our relatively conservative approach in the immediate term. We will continue to monitor the economic data and the yield curve for signs that a Fed pause is imminent, which would give us greater reason to extend the portfolio's maturity. The Trust's portfolio composition, as a percent of net assets, at the end of March and as of our last report to shareholders is detailed below: 3/31/06 9/30/05 U.S. Government Obligations 99.0% 98.7% Other Assets Less Liabilities 1.0 1.3 ------ ------ Total 100.0% 100.0% ====== ====== Cindy V. Macaulay Vice President and Portfolio Manager April 11, 2006 CMA TREASURY FUND MARCH 31, 2006 Disclosure of Expenses Shareholders of this Fund may incur the following charges: (a) expenses related to transactions, including sales charges, redemption fees and exchange fees; and (b) operating expenses including advisory fees, distribution fees including 12b-1 fees, and other Fund expenses. The following example (which is based on a hypothetical investment of $1,000 invested on October 1, 2005 and held through March 31, 2006) is intended to assist shareholders both in calculating expenses based on an investment in the Fund and in comparing these expenses with similar costs of investing in other mutual funds. The first table below provides information about actual account values and actual expenses. In order to estimate the expenses a shareholder paid during the period covered by this report, shareholders can divide their account value by $1,000 and then multiply the result by the number in the first line under the heading entitled "Expenses Paid During the Period." The second table below provides information about hypothetical account values and hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses. In order to assist shareholders in comparing the ongoing expenses of investing in this Fund and other funds, compare the 5% hypothetical example with the 5% hypothetical examples that appear in other funds' shareholder reports. The expenses shown in the table are intended to highlight shareholders' ongoing costs only and do not reflect any transactional expenses, such as sales charges, redemption fees or exchange fees. Therefore, the second table is useful in comparing ongoing expenses only, and will not help shareholders determine the relative total expenses of owning different funds. If these transactional expenses were included, shareholder expenses would have been higher. Expenses Paid Beginning Ending During the Period* Account Value Account Value October 1, 2005 October 1, March 31, to March 31, 2005 2006 2006 Actual CMA Treasury Fund $1,000 $1,016.30 $3.32 Hypothetical (5% annual return before expenses)** CMA Treasury Fund $1,000 $1,021.61 $3.33 * Expenses are equal to the annualized expense ratio .66%, multiplied by the average account value over the period, multiplied by 182/365 (to reflect the one-half year period shown). Because the Fund is a feeder fund, the expense table reflects the expenses of both the feeder fund and the master trust in which it invests. ** Hypothetical 5% annual return before expenses is calculated by pro-rating the number of days in the most recent fiscal half year divided by 365. CMA TREASURY FUND MARCH 31, 2006 Statement of Assets and Liabilities CMA Treasury Fund As of March 31, 2006 Assets Investment in Master Treasury Trust (the "Trust"), at value (identified cost--$481,703,457) $ 481,784,935 Prepaid expenses 29,206 --------------- Total assets 481,814,141 --------------- Liabilities Payables: Administrator $ 92,395 Distributor 69,330 Other affiliates 9,764 171,489 --------------- Accrued expenses and other liabilities 12,928 --------------- Total liabilities 184,417 --------------- Net Assets Net assets $ 481,629,724 =============== Net Assets Consist of Shares of beneficial interest, $.10 par value, unlimited number of shares authorized $ 48,154,825 Paid-in capital in excess of par 433,393,421 Unrealized appreciation allocated from the Trust--net 81,478 --------------- Net Assets--Equivalent to $1.00 per share based on 481,548,248 shares of beneficial interest outstanding $ 481,629,724 =============== See Notes to Financial Statements. CMA TREASURY FUND MARCH 31, 2006 Statement of Operations CMA Treasury Fund For the Year Ended March 31, 2006 Investment Income Interest from affiliates $ 197,640 Net investment income allocated from the Trust: Interest and amortization of premium and discount earned 16,543,969 Expenses (1,267,525) --------------- Total income 15,474,084 --------------- Expenses Administration fees $ 1,223,899 Distribution fees 582,297 Registration fees 57,150 Transfer agent fees 56,395 Printing and shareholder reports 34,157 Professional fees 25,944 Other 8,839 --------------- Total expenses 1,988,681 --------------- Investment income--net 13,485,403 --------------- Realized & Unrealized Gain Allocated from the Trust--Net Realized gain on investments--net 28,578 Change in unrealized appreciation on investments--net 30,523 --------------- Total realized and unrealized gain--net 59,101 --------------- Net Increase in Net Assets Resulting from Operations $ 13,544,504 =============== See Notes to Financial Statements. CMA TREASURY FUND MARCH 31, 2006 Statements of Changes in Net Assets CMA Treasury Fund For the Year Ended March 31, Increase (Decrease) in Net Assets: 2006 2005 Operations Investment income--net $ 13,485,403 $ 5,836,826 Realized gain--net 28,578 14,186 Change in unrealized appreciation--net 30,523 (231,083) --------------- --------------- Net increase in net assets resulting from operations 13,544,504 5,619,929 --------------- --------------- Dividends & Distributions to Shareholders Investment income--net (13,485,403) (5,836,826) Realized gain--net (28,578) (14,186) --------------- --------------- Net decrease in net assets resulting from dividends and distributions to shareholders (13,513,981) (5,851,012) --------------- --------------- Beneficial Interest Transactions Net proceeds from sale of shares 1,488,532,295 2,146,386,306 Value of shares issued to shareholders in reinvestment of dividends and distributions 13,513,981 5,850,955 --------------- --------------- Total shares issued 1,502,046,276 2,152,237,261 Cost of shares redeemed (1,622,654,458) (2,223,173,925) --------------- --------------- Net decrease in net assets derived from beneficial interest transactions (120,608,182) (70,936,664) --------------- --------------- Net Assets Total decrease in net assets (120,577,659) (71,167,747) Beginning of year 602,207,383 673,375,130 --------------- --------------- End of year $ 481,629,724 $ 602,207,383 =============== =============== See Notes to Financial Statements. CMA TREASURY FUND MARCH 31, 2006 Financial Highlights CMA Treasury Fund The following per share data and ratios have been derived For the Year Ended March 31, from information provided in the financial statements. 2006 2005 2004 2003++ 2002 Per Share Operating Performance Net asset value, beginning of year $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 ---------- ---------- ---------- ---------- ---------- Investment income--net .0277 .0094 .0040 .0111 .0248 Realized and unrealized gain (loss)--net .0001 (.0004) (.0001) (.0004) .0004 ---------- ---------- ---------- ---------- ---------- Total from investment operations .0278 .0090 .0039 .0107 .0252 ---------- ---------- ---------- ---------- ---------- Less dividends and distributions: Investment income--net (.0277) (.0094) (.0040) (.0111) (.0248) Realized gain--net (.0001) --* (.0001) (.0001) (.0003) ---------- ---------- ---------- ---------- ---------- Total dividends and distributions (.0278) (.0094) (.0041) (.0112) (.0251) ---------- ---------- ---------- ---------- ---------- Net asset value, end of year $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 ========== ========== ========== ========== ========== Total investment return 2.81% .95% .41% 1.11% 2.48% ========== ========== ========== ========== ========== Ratios to Average Net Assets Expenses .67%++++ .66%++++ .63%++++ .61%++++ .61% ========== ========== ========== ========== ========== Investment income and realized gain--net 2.76%++++ .94%++++ .43%++++ 1.10%++++ 2.43% ========== ========== ========== ========== ========== Supplemental Data Net assets, end of year (in thousands) $ 481,630 $ 602,207 $ 673,375 $1,297,550 $1,474,004 ========== ========== ========== ========== ========== * Amount is less than $(.0001) per share. ++ On February 13, 2003, the Fund converted from a stand-alone investment company to a "feeder" fund that seeks to achieve its investment objective by investing all of its assets in the Trust, which has the same investment objective as the Fund. All investments will be made at the Trust level. This structure is sometimes called a "master/feeder" structure. ++++ Includes the Fund's share of the Trust's allocated expenses and/or investment income and realized gain--net. See Notes to Financial Statements. CMA TREASURY FUND MARCH 31, 2006 Notes to Financial Statements CMA Treasury Fund 1. Significant Accounting Policies: CMA Treasury Fund (the "Fund") is registered under the Investment Company Act of 1940, as amended, as a no load, diversified, open-end management investment company. The Fund seeks to achieve its investment objective by investing all of its assets in the Master Treasury Trust (the "Trust"), which has the same investment objective and strategies as the Fund. The value of the Fund's investment in the Trust reflects the Fund's proportionate interest in the net assets of the Trust. The performance of the Fund is directly affected by the performance of the Trust. The financial statements of the Trust, including the Schedule of Investments, are included elsewhere in this report and should be read in conjunction with the Fund's financial statements. The Fund's financial statements are prepared in conformity with U.S. generally accepted accounting principles, which may require the use of management accruals and estimates. Actual results may differ from these estimates. The percentage of the Trust owned by the Fund at March 31, 2006 was 55.2%. The following is a summary of significant accounting policies followed by the Fund. (a) Valuation of investments--The Fund records its investment in the Trust at fair value. Valuation of securities held by the Trust is discussed in Note 1(a) of the Trust's Notes to Financial Statements, which are included elsewhere in this report. (b) Investment income and expenses--The Fund records daily its proportionate share of the Trust's income, expenses and realized and unrealized gains and losses. In addition, the Fund accrues its own income and expenses. (c) Income taxes--It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute substantially all of its taxable income to its shareholders. Therefore, no federal income tax provision is required. (d) Prepaid registration fees--Prepaid registration fees are charged to expense as the related shares are issued. (e) Dividends and distributions to shareholders--The Fund declares dividends daily and reinvests daily such dividends (net of non-resident alien tax and backup withholding tax withheld) in additional fund shares at net asset value. Dividends and distributions are declared from the total of net investment income and net realized gain or loss on investments. (f) Investment transactions--Investment transactions in the Trust are accounted for on a trade date basis. 2. Transactions with Affiliates: The Fund has entered into an Administration Agreement with Fund Asset Management, L.P. ("FAM"). The general partner of FAM is Princeton Services, Inc. ("PSI"), a wholly-owned subsidiary of Merrill Lynch & Co., Inc. ("ML & Co."), which is the limited partner. The Fund pays a monthly fee at an annual rate of .25% of the Fund's average daily net assets for the performance of administrative services (other than investment advice and related portfolio activities) necessary for the operation of the Fund. Pursuant to the Distribution and Shareholder Servicing Plan in compliance with Rule 12b-1 under the Investment Company Act of 1940, Merrill Lynch, Pierce, Fenner & Smith Incorporated ("MLPF&S"), an affiliate of FAM, receives a distribution fee from the Fund. The fee is accrued daily and paid monthly at the annual rate of .125% of average daily net assets of the Fund for shareholders whose Fund accounts are serviced by MLPF&S financial advisors, whether maintained through MLPF&S or directly with the Fund's transfer agent. The distribution fee is to compensate MLPF&S for providing, or arranging for the provision of, account maintenance and sales and promotional activities and services with respect to shares of the Fund. For the year ended March 31, 2006, MLPF&S earned $582,297 under the Shareholder Servicing Plan. Financial Data Services, Inc. ("FDS"), a wholly-owned subsidiary of ML & Co., is the Fund's transfer agent. Interest is earned by the Fund from FDS based on the difference, if any, between estimated and actual daily beneficial share activity, which results in uninvested net proceeds from sales of Fund shares. Certain officers and/or trustees of the Fund are officers and/or directors of FAM, PSI, FDS, and/or ML & Co. In February 2006, ML & Co. and BlackRock, Inc. entered into an agreement to contribute ML & Co.'s investment management business, including FAM, to the investment management business of BlackRock, Inc. The transaction is expected to close in the third quarter of 2006. CMA TREASURY FUND MARCH 31, 2006 Notes to Financial Statements (concluded) CMA Treasury Fund 3. Beneficial Interest Transactions: The number of shares sold, reinvested and redeemed during the periods corresponds to the amounts included in the Statements of Changes in Net Assets for net proceeds from sale of shares, value of shares reinvested and cost of shares redeemed, respectively, since shares are recorded at $1.00 per share. 4. Distribution to Shareholders: The tax character of distributions paid during the fiscal years ended March 31, 2006 and March 31, 2005 was as follows: 3/31/2006 3/31/2005 Distributions paid from: Ordinary income $ 13,513,981 $ 5,837,177 Net long-term capital gains -- 13,835 ------------- ------------- Total taxable distributions $ 13,513,981 $ 5,851,012 ============= ============= As of March 31, 2006, there were no significant differences between the book and tax components of net assets. Report of Independent Registered Public Accounting Firm CMA Treasury Fund To the Shareholders and Board of Trustees of CMA Treasury Fund: We have audited the accompanying statement of assets and liabilities of CMA Treasury Fund as of March 31, 2006, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, and the financial highlights for each of the 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 control over financial reporting. Our audits 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. 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 CMA Treasury Fund as of March 31, 2006, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and its financial highlights for each of the five years in the period then ended, in conformity with U.S. generally accepted accounting principles. Deloitte & Touche LLP Princeton, New Jersey May 22, 2006 CMA TREASURY FUND MARCH 31, 2006 Schedule of Investments Master Treasury Trust (In Thousands) Face Interest Maturity Issue Amount Rate(s) Date Value U.S. Government Obligations*--99.0% U.S. Treasury Bills $140,160 3.861 - 4.485 % 4/06/2006 $ 140,062 158,782 3.955 - 4.586 4/13/2006 158,532 172,889 4.005 - 4.58 4/20/2006 172,455 90,046 4.06 - 4.595 4/27/2006 89,750 18,648 4.351 5/04/2006 18,575 30,000 4.362 - 4.39 5/11/2006 29,857 4,501 4.442 5/18/2006 4,476 26,000 4.467 5/25/2006 25,831 38,000 4.162 - 4.172 6/08/2006 37,689 35,000 4.19 - 4.217 6/22/2006 34,653 30,877 4.34 - 4.38 7/27/2006 30,433 U.S. Treasury Notes 10,000 2.25 4/30/2006 9,981 57,000 2.00 5/15/2006 56,816 5,000 4.625 5/15/2006 5,000 30,000 2.50 5/31/2006 29,896 5,000 2.375 8/15/2006 4,956 4,700 2.50 10/31/2006 4,637 11,402 2.875 11/30/2006 11,255 Total Investments (Cost--$864,935**)--99.0% 864,854 Other Assets Less Liabilities--1.0% 8,683 ----------- Net Assets--100.0% $ 873,537 =========== * U.S. Treasury Bills are traded on a discount basis; the interest rates shown are the range of discount rates paid at the time of purchase. U.S. Treasury Notes bear interest at the rates shown, payable at fixed dates until maturity. ** The cost and unrealized appreciation (depreciation) of investments as of March 31, 2006, as computed for federal income tax purposes, were as follows: Aggregate cost $ 864,935 =============== Gross unrealized appreciation $ 23 Gross unrealized depreciation (104) --------------- Net unrealized depreciation $ (81) =============== See Notes to Financial Statements. CMA TREASURY FUND MARCH 31, 2006 Statement of Assets and Liabilities Master Treasury Trust As of March 31, 2006 Assets Investments in unaffiliated securities, at value (identified cost--$864,935,150) $ 864,853,868 Cash 25,581 Receivables: Contributions $ 7,871,204 Interest 1,030,172 8,901,376 --------------- Prepaid expenses 5,506 --------------- Total assets 873,786,331 --------------- Liabilities Payables: Investment adviser 149,044 Other affiliates 8,565 157,609 --------------- Accrued expenses 91,924 --------------- Total liabilities 249,533 --------------- Net Assets Net assets $ 873,536,798 =============== Net Assets Consist of Investors' capital $ 873,618,080 Unrealized depreciation--net (81,282) --------------- Net Assets $ 873,536,798 =============== See Notes to Financial Statements. Statement of Operations Master Treasury Trust For the Year Ended March 31, 2006 Investment Income Interest and amortization of premium and discount earned $ 29,915,030 Expenses Investment advisory fees $ 1,913,838 Accounting services 223,071 Professional fees 47,605 Trustees' fees and expenses 38,484 Custodian fees 31,548 Pricing fees 3,836 Printing and shareholder reports 273 Other 20,903 --------------- Total expenses 2,279,558 --------------- Investment income--net 27,635,472 --------------- Realized & Unrealized Gain--Net Realized gain on investments--net 49,565 Change in unrealized depreciation on investments--net 55,776 --------------- Total realized and unrealized gain--net 105,341 --------------- Net Increase in Net Assets Resulting from Operations $ 27,740,813 =============== See Notes to Financial Statements. CMA TREASURY FUND MARCH 31, 2006 Statements of Changes in Net Assets Master Treasury Trust For the Year Ended March 31, Increase (Decrease) in Net Assets: 2006 2005 Operations Investment income--net $ 27,635,472 $ 13,655,989 Realized gain--net 49,565 23,252 Change in unrealized depreciation--net 55,776 (391,579) --------------- --------------- Net increase in net assets resulting from operations 27,740,813 13,287,662 --------------- --------------- Capital Transactions Proceeds from contributions 4,793,985,856 5,338,064,437 Fair value of withdrawals (4,917,573,291) (5,497,700,237) --------------- --------------- Net decrease in net assets derived from capital transactions (123,587,435) (159,635,800) --------------- --------------- Net Assets Total decrease in net assets (95,846,622) (146,348,138) Beginning of year 969,383,420 1,115,731,558 --------------- --------------- End of year $ 873,536,798 $ 969,383,420 =============== =============== See Notes to Financial Statements. Financial Highlights Master Treasury Trust For the Period February 13, 2003++ The following per share data and ratios have been derived For the Year Ended March 31, to March 31, from information provided in the financial statements. 2006 2005 2004 2003 Total Investment Return Total investment return 3.22% 1.35% .81% .60%* ============ ============ ============ ============ Ratios to Average Net Assets Expenses .26% .25% .23% .25%* ============ ============ ============ ============ Investment income and realized gain--net 3.14% 1.34% .82% .98%* ============ ============ ============ ============ Supplemental Data Net assets, end of period (in thousands) $ 873,537 $ 969,383 $ 1,115,732 $ 1,298,116 ============ ============ ============ ============ * Annualized. ++ Commencement of operations. See Notes to Financial Statements. CMA TREASURY FUND MARCH 31, 2006 Notes to Financial Statements Master Treasury Trust 1. Significant Accounting Policies: Master Treasury Trust (the "Trust") is registered under the Investment Company Act of 1940, as amended, and is organized as a Delaware statutory trust. The Declaration of Trust permits the Trustees to issue nontransferable interests in the Trust, subject to certain limitations. The Trust's financial statements are prepared in conformity with U.S. generally accepted accounting principles, which may require the use of management accruals and estimates. Actual results may differ from these estimates. The following is a summary of significant accounting policies followed by the Trust. (a) Valuation of investments--Portfolio securities with remaining maturities of greater than sixty days, for which market quotations are readily available, are valued at market value. As securities transition from sixty-one to sixty days to maturity, the difference between the valuation existing on the sixty- first day before maturity and maturity value is amortized on a straight-line basis to maturity. Securities maturing sixty days or less from their date of acquisition are valued at amortized cost, which approximates market value. For purposes of valuation, the maturity of a variable rate security is deemed to be the next coupon date on which the interest rate is to be adjusted. Other investments and assets for which market quotations are not available are valued at fair value as determined in good faith by or under the direction of the Board of Trustees. (b) Income taxes--The Trust is classified as a partnership for federal income tax purposes. As such, each investor in the Trust is treated as owner of its proportionate share of the net assets, income, expenses and realized and unrealized gains and losses of the Trust. Therefore, no federal income tax provision is required. It is intended that the Trust's assets will be managed so an investor in the Trust can satisfy the requirements of Subchapter M of the Internal Revenue Code. (c) Security transactions and investment income--Security transactions are recorded on the dates the transactions are entered into (the trade dates). Realized gains and losses on security transactions are determined on the identified cost basis. Interest income (including amortization of premium and discount) is recognized on the accrual basis. 2. Investment Advisory Agreement and Transactions with Affiliates: The Trust has entered into an Investment Advisory Agreement with Fund Asset Management, L.P. ("FAM"). The general partner of FAM is Princeton Services, Inc. ("PSI"), an indirect, wholly-owned subsidiary of Merrill Lynch & Co., Inc. ("ML & Co."), which is the limited partner. FAM is responsible for the management of the Trust's portfolio and provides the necessary personnel, facilities, equipment and certain other services necessary to the operations of the Trust. For such services, the Trust pays a monthly fee based upon the average daily value of the Trust's net assets at the following annual rates: .25% of the Trust's average daily net assets not exceeding $500 million; .175% of the average daily net assets in excess of $500 million, but not exceeding $1 billion; and .125% of the average daily net assets in excess of $1 billion. For the year ended March 31, 2006, the Trust reimbursed FAM $19,874 for certain accounting services. Certain officers and/or trustees of the Trust are officers and/or directors of FAM, PSI, and/or ML & Co. In February 2006, ML & Co. and BlackRock, Inc. entered into an agreement to contribute ML & Co.'s investment management business, including FAM, to the investment management business of BlackRock, Inc. The transaction is expected to close in the third quarter of 2006. CMA TREASURY FUND MARCH 31, 2006 Report of Independent Registered Public Accounting Firm Master Treasury Trust To the Investors and Board of Trustees of Master Treasury Trust: We have audited the accompanying statement of assets and liabilities, including the schedule of investments, of Master Treasury Trust as of March 31, 2006, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, and the financial highlights for each of the respective periods then ended. These financial statements and financial highlights are the responsibility of the Trust'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 Trust is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. Our audits 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 Trust'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 March 31, 2006, by correspondence with the custodian. 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 Master Treasury Trust as of March 31, 2006, the results of its operations for the year then ended, and the changes in its net assets for each of the two years in the period then ended, and its financial highlights for each of the respective periods then ended, in conformity with U.S. generally accepted accounting principles. Deloitte & Touche LLP Princeton, New Jersey May 22, 2006 CMA TREASURY FUND MARCH 31, 2006 Officers and Trustees Number of Portfolios in Other Public Position(s) Length of Fund Complex Directorships Held with Time Overseen by Held by Name, Address & Age Fund/Trust Served Principal Occupation(s) During Past 5 Years Trustee Trustee Interested Trustee Robert C. Doll, Jr.* President 2005 to President of MLIM/FAM-advised funds since 131 Funds None P.O. Box 9011 and present 2005; President of MLIM and FAM since 2001; 177 Portfolios Princeton, Trustee Co-Head (Americas Region) thereof from 2000 NJ 08543-9011 to 2001 and Senior Vice President from 1999 Age: 51 to 2001; President and Director of Princeton Services, Inc. ("Princeton Services") since 2001; President of Princeton Administrators, L.P. ("Princeton Administrators") since 2001; Chief Investment Officer of OppenheimerFunds, Inc. in 1999 and Executive Vice President thereof from 1991 to 1999. * Mr. Doll is a director, trustee or member of an advisory board of certain other investment companies for which MLIM or FAM acts as investment adviser. Mr. Doll is an "interested person," as defined in the Investment Company Act, of the Fund based on his positions with MLIM, FAM, Princeton Services and Princeton Administrators. Trustees serve until their resignation, removal or death, or until December 31 of the year in which they turn 72. As Fund/Trust President, Mr. Doll serves at the pleasure of the Board of Trustees. Independent Trustees* Ronald W. Forbes** Trustee 1991/2002 Professor Emeritus of Finance, School of 49 Funds None P.O. Box 9095 to present Business, State University of New York at 50 Portfolios Princeton, Albany since 2000 and Professor thereof NJ 08543-9095 from 1989 to 2000; International Consultant, Age: 65 Urban Institute, Washington, D.C. from 1995 to 1999. Cynthia A. Montgomery Trustee 1994/2002 Professor, Harvard Business School since 49 Funds Newell P.O. Box 9095 to present 1989; Associate Professor, J.L. Kellogg 50 Portfolios Rubbermaid, Inc. Princeton, Graduate School of Management, Northwestern (manufacturing) NJ 08543-9095 University from 1985 to 1989; Associate Age: 53 Professor, Graduate School of Business Administration, University of Michigan from 1979 to 1985; Director, Harvard Business School Publishing since 2005; Director, McLean Hospital since 2005. Jean Margo Reid Trustee 2004 to Self-employed consultant since 2001; 49 Funds None P.O. Box 9095 present Counsel of Alliance Capital Management 50 Portfolios Princeton, (investment adviser) in 2000; General NJ 08543-9095 Counsel, Director and Secretary of Age: 60 Sanford C. Bernstein & Co., Inc. (investment adviser/broker-dealer) from 1997 to 2000; Secretary, Sanford C. Bernstein Fund, Inc. from 1994 to 2000; Director and Secretary of SCB, Inc. since 1998; Director and Secretary of SCB Partners, Inc. since 2000; and Director of Covenant House from 2001 to 2004. Roscoe S. Suddarth Trustee 2000/2002 President, Middle East Institute from 1995 49 Funds None P.O. Box 9095 to present to 2001; Foreign Service Officer, United 50 Portfolios Princeton, States Foreign Service, from 1961 to 1995 and NJ 08543-9095 Career Minister from 1989 to 1995; Deputy Age: 70 Inspector General, U.S. Department of State, from 1991 to 1994; U.S. Ambassador to the Hashemite Kingdom of Jordan from 1987 to 1990. Richard R. West Trustee 1991/2002 Professor of Finance from 1984 to 1995, 49 Funds Bowne & Co., P.O. Box 9095 to present Dean from 1984 to 1993 and since 1995 50 Portfolios Inc. (financial Princeton, Dean Emeritus of New York University printers); NJ 08543-9095 Leonard N. Stern School of Business Vornado Realty Age: 68 Administration. Trust (real estate company); Alexander's, Inc. (real estate company) CMA TREASURY FUND MARCH 31, 2006 Officers and Trustees (concluded) Number of Portfolios in Other Public Position(s) Length of Fund Complex Directorships Held with Time Overseen by Held by Name, Address & Age Fund/Trust Served Principal Occupation(s) During Past 5 Years Trustee Trustee Independent Trustees* (concluded) Edward D. Zinbarg Trustee 2000/2002 Self-employed financial consultant since 49 Funds None P.O. Box 9095 to present 1994; Executive Vice President of the 50 Portfolios Princeton, Prudential Insurance Company of America NJ 08543-9095 from 1988 to 1994; Former Director of Age: 71 Prudential Reinsurance Company and former Trustee of the Prudential Foundation. * Trustees serve until their resignation, removal or death, or until December 31 of the year in which they turn 72. ** Chairman of the Board of Trustees and the Audit Committee. Position(s) Length of Held with Time Name, Address & Age Fund/Trust Served Principal Occupation(s) During Past 5 Years Fund Officers* Donald C. Burke Vice 1993/2002 First Vice President of MLIM and FAM since 1997 and Treasurer thereof since P.O. Box 9011 President to present 1999; Senior Vice President and Treasurer of Princeton Services since 1999 Princeton, and and and Director since 2004; Vice President of FAM Distributors, Inc. ("FAMD") NJ 08543-9011 Treasurer 1999 to since 1999 and Director since 2004; Vice President of MLIM and FAM from 1990 Age: 45 present to 1997; Director of Taxation of MLIM from 1990 to 2001; Vice President, Treasurer and Secretary of the IQ Funds since 2004. Cindy V. Macaulay Vice 2002 to Vice President of MLIM since 1996. P.O. Box 9011 President present Princeton, NJ 08543-9011 Age: 39 Jeffrey Hiller Chief 2004 to Chief Compliance Officer of the MLIM/FAM-advised funds and First Vice P.O. Box 9011 Compliance present President and Chief Compliance Officer of MLIM (Americas Region) since Princeton, Officer 2004; Chief Compliance Officer of the IQ Funds since 2004; Global Director NJ 08543-9011 of Compliance at Morgan Stanley Investment Management from 2002 to 2004; Age: 54 Managing Director and Global Director of Compliance at Citigroup Asset Management from 2000 to 2002; Chief Compliance Officer at Soros Fund Management in 2000; Chief Compliance Officer at Prudential Financial from 1995 to 2000; Senior Counsel in the Commission's Securities and Exchange Division of Enforcement in Washington, D.C. from 1990 to 1995. Alice A. Pellegrino Secretary 2004 to Director (Legal Advisory) of MLIM since 2002; Vice President of MLIM from P.O. Box 9011 present 1999 to 2002; Attorney associated with MLIM since 1997; Secretary of MLIM, Princeton, FAM, FAMD and Princeton Services since 2004. NJ 08543-9011 Age: 46 * Officers of the Fund/Trust serve at the pleasure of the Board of Trustees. Further information about the Fund's Officers and Trustees is available in the Fund's Statement of Additional Information, which can be obtained without charge by calling 1-800-637-3863. Custodian State Street Bank and Trust Company P.O. Box 351 Boston, MA 02101 Transfer Agent Financial Data Services, Inc. 4800 Deer Lake Drive East Jacksonville, FL 32246-6484 800-221-7210* * For inquiries regarding your CMA account, call 800-CMA-INFO (800-262-4636). CMA TREASURY FUND MARCH 31, 2006 Item 2 - Code of Ethics - The registrant has adopted a code of ethics, as of the end of the period covered by this report, that applies to the registrant's principal executive officer, principal financial officer and principal accounting officer, or persons performing similar functions. A copy of the code of ethics is available without charge upon request by calling toll-free 1-800-MER-FUND (1-800-637-3863). Item 3 - Audit Committee Financial Expert - The registrant's board of directors has determined that (i) the registrant has the following audit committee financial experts serving on its audit committee and (ii) each audit committee financial expert is independent: (1) Ronald W. Forbes, (2) Richard R. West, and (3) Edward D. Zinbarg. Item 4 - Principal Accountant Fees and Services CMA Treasury Fund (a) Audit Fees - Fiscal Year Ending March 31, 2006 - $6,600 Fiscal Year Ending March 31, 2005 - $6,500 (b) Audit-Related Fees - Fiscal Year Ending March 31, 2006 - $0 Fiscal Year Ending March 31, 2005 - $0 (c) Tax Fees - Fiscal Year Ending March 31, 2006 - $6,000 Fiscal Year Ending March 31, 2005 - $6,300 The nature of the services include tax compliance, tax advice and tax planning. (d) All Other Fees - Fiscal Year Ending March 31, 2006 - $0 Fiscal Year Ending March 31, 2005 - $0 Master Treasury Trust (a) Audit Fees - Fiscal Year Ending March 31, 2006 - $28,500 Fiscal Year Ending March 31, 2005 - $28,000 (b) Audit-Related Fees - Fiscal Year Ending March 31, 2006 - $0 Fiscal Year Ending March 31, 2005 - $0 (c) Tax Fees - Fiscal Year Ending March 31, 2006 - $9,200 Fiscal Year Ending March 31, 2005 - $8,700 The nature of the services include tax compliance, tax advice and tax planning. (d) All Other Fees - Fiscal Year Ending March 31, 2006 - $0 Fiscal Year Ending March 31, 2005 - $0 (e)(1) The registrant's audit committee (the "Committee") has adopted policies and procedures with regard to the pre-approval of services. Audit, audit-related and tax compliance services provided to the registrant on an annual basis require specific pre- approval by the Committee. The Committee also must approve other non-audit services provided to the registrant and those non-audit services provided to the registrant's affiliated service providers that relate directly to the operations and the financial reporting of the registrant. Certain of these non-audit services that the Committee believes are a) consistent with the SEC's auditor independence rules and b) routine and recurring services that will not impair the independence of the independent accountants may be approved by the Committee without consideration on a specific case- by-case basis ("general pre-approval"). However, such services will only be deemed pre-approved provided that any individual project does not exceed $5,000 attributable to the registrant or $50,000 for all of the registrants the Committee oversees. Any proposed services exceeding the pre-approved cost levels will require specific pre-approval by the Committee, as will any other services not subject to general pre-approval (e.g., unanticipated but permissible services). The Committee is informed of each service approved subject to general pre-approval at the next regularly scheduled in-person board meeting. (e)(2) 0% (f) Not Applicable (g) Fiscal Year Ending March 31, 2006 - $3,754,550 Fiscal Year Ending March 31, 2005 - $10,018,400 (h) The registrant's audit committee has considered and determined that the provision of non-audit services that were rendered to the registrant's investment adviser and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant that were not pre- approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. Regulation S-X Rule 2-01(c)(7)(ii) - $1,227,000, 0% Item 5 - Audit Committee of Listed Registrants - Not Applicable Item 6 - Schedule of Investments - Not Applicable Item 7 - Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies - Not Applicable Item 8 - Portfolio Managers of Closed-End Management Investment Companies - Not Applicable Item 9 - Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers - Not Applicable Item 10 - Submission of Matters to a Vote of Security Holders - Not Applicable Item 11 - Controls and Procedures 11(a) - The registrant's certifying officers have reasonably designed such disclosure controls and procedures to ensure material information relating to the registrant is made known to us by others particularly during the period in which this report is being prepared. The registrant's certifying officers have determined that the registrant's disclosure controls and procedures are effective based on our evaluation of these controls and procedures as of a date within 90 days prior to the filing date of this report. 11(b) - There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the Act (17 CFR 270.30a-3(d)) that occurred during the second fiscal half- year of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting. Item 12 - Exhibits attached hereto 12(a)(1) - Code of Ethics - See Item 2 12(a)(2) - Certifications - Attached hereto 12(a)(3) - Not Applicable 12(b) - Certifications - Attached hereto Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. CMA Treasury Fund and Master Treasury Trust By: /s/ Robert C. Doll, Jr. --------------------------- Robert C. Doll, Jr., Chief Executive Officer of CMA Treasury Fund and Master Treasury Trust Date: May 22, 2006 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By: /s/ Robert C. Doll, Jr. --------------------------- Robert C. Doll, Jr., Chief Executive Officer of CMA Treasury Fund and Master Treasury Trust Date: May 22, 2006 By: /s/ Donald C. Burke --------------------------- Donald C. Burke, Chief Financial Officer of CMA Treasury Fund and Master Treasury Trust Date: May 22, 2006