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 811-21199 811-21298 Name of Fund: WCMA 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, WCMA 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: 03/31/07 Date of reporting period: 04/01/06 - 03/31/07 Item 1 - Report to Stockholders Annual Report March 31, 2007 WCMA Treasury Fund This report is transmitted to shareholders only. It 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. 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 1-800-441-7762; (2) at www.blackrock.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.blackrock.com and (2) on the Securities and Exchange Commission's Web site at http://www.sec.gov. WCMA Treasury Fund P.O. Box 9011 Princeton, NJ 08543-9011 (GO PAPERLESS... logo) It's Fast, Convenient, & Timely! WCMA Treasury Fund 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 Electronic copies of most financial reports and prospectuses are available on the Fund's Web site. Shareholders can sign up for e-mail notifications of quarterly statements, annual and semi-annual reports and prospectuses by enrolling in the Fund's electronic delivery program. Shareholders Who Hold Accounts with Investment Advisers, Banks or Brokerages: Please contact your financial advisor to enroll. Please note that not all investment advisers, banks or brokerages may offer this service. BlackRock Privacy Principles BlackRock is committed to maintaining the privacy of its current and former fund investors and individual clients (collectively, "Clients") and to safeguarding their nonpublic personal information. The following information is provided to help you understand what personal information BlackRock collects, how we protect that information and why in certain cases we share such information with select parties. If you are located in a jurisdiction where specific laws, rules or regulations require BlackRock to provide you with additional or different privacy-related rights beyond what is set forth below, then BlackRock will comply with those specific laws, rules or regulations. BlackRock obtains or verifies personal nonpublic information from and about you from different sources, including the following: (i) information we receive from you or, if applicable, your financial intermediary, on applications, forms or other documents; (ii) information about your transactions with us, our affiliates, or others; (iii) information we receive from a consumer reporting agency; and (iv) from visits to our Web sites. BlackRock does not sell or disclose to nonaffiliated third parties any nonpublic personal information about its Clients, except as permitted by law or as is necessary to service Client accounts. These nonaffiliated third parties are required to protect the confidentiality and security of this information and to use it only for its intended purpose. We may share information with our affiliates to service your account or to provide you with information about other BlackRock products or services that may be of interest to you. In addition, BlackRock restricts access to nonpublic personal information about its Clients to those BlackRock employees with a legitimate business need for the information. BlackRock maintains physical, electronic and procedural safeguards that are designed to protect the nonpublic personal information of its Clients, including procedures relating to the proper storage and disposal of such information. WCMA TREASURY FUND MARCH 31, 2007 A Letter to Shareholders Dear Shareholder For most financial markets, 2007 opened just as 2006 ended - on a positive trajectory. At the end of February and into March, however, global equity markets registered their first significant decline since last summer. The market jitters were triggered by a significant setback in the Chinese market and were exacerbated by several concerns, notably a weakening economy, some disappointing corporate earnings announcements, escalating geopolitical concerns in the Middle East and increasing delinquencies in the subprime mortgage market. Despite the recent spate of volatility, underlying stock market fundamentals appear quite sound, supported by a generally favorable global economic backdrop, tame inflation, relatively low interest rates and attractive valuations. Not unlike the equity market, the bond market also has seen volatility recently as observers have attempted to interpret mixed economic signals. A bond market rally late last year reversed itself early in 2007 as economic data strengthened. Prices improved (and yields fell) again in February as equities struggled, but retrenched slightly in March. Notably, the Treasury curve remained inverted for much of 2006 and into 2007. The 30-year Treasury yield stood at 4.84% at the end of March 2007, while the one-month Treasury offered the highest yield on the curve at 5.07%. For its part, the Federal Reserve Board (the Fed) has left the target short- term interest rate on hold at 5.25% since first pausing in its interest rate- hiking campaign on August 8, 2006. Although the central bankers continue to express concern about potential inflationary pressures, they also have made reference to signs of economic weakness in their public statements. Most observers expect the Fed to keep interest rates on hold for now. Notwithstanding some recent volatility, most major market indexes managed to post positive returns for the annual and semi-annual reporting periods ended March 31, 2007: Total Returns as of March 31, 2007 6-month 12-month U.S. equities (Standard & Poor's 500 Index) + 7.38% +11.83% Small cap U.S. equities (Russell 2000 Index) +11.02 + 5.91 International equities (MSCI Europe, Australasia, Far East Index) +14.85 +20.20 Fixed income (Lehman Brothers Aggregate Bond Index) + 2.76 + 6.59 Tax-exempt fixed income (Lehman Brothers Municipal Bond Index) + 1.93 + 5.43 High yield bonds (Credit Suisse High Yield Index) + 7.59 +11.82 If recent market movements are any guide, 2007 could be a year of enhanced market volatility. As you navigate the uncertainties of the financial markets, we encourage you to review your investment goals with your financial professional and to make portfolio changes, as needed. For more reflection on the markets, please ask your financial professional for the latest issue of "What's Ahead in 2007: First Quarter Update," or view it online at www.blackrock.com/funds. We thank you for trusting BlackRock with your investment assets, and we look forward to continuing to serve you in the months and years ahead. Sincerely, (Robert C. Doll, Jr.) Robert C. Doll, Jr. Fund President and Trustee WCMA TREASURY FUND MARCH 31, 2007 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, 2006 and held through March 31, 2007) 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, 2006 October 1, March 31, to March 31, 2006 2007 2007 Actual Class 1 $1,000 $1,017.00 $7.95 Class 2 $1,000 $1,019.60 $5.24 Class 3 $1,000 $1,021.40 $3.48 Class 4 $1,000 $1,021.40 $3.43 Hypothetical (5% annual return before expenses)** Class 1 $1,000 $1,017.02 $7.95 Class 2 $1,000 $1,019.71 $5.24 Class 3 $1,000 $1,021.46 $3.48 Class 4 $1,000 $1,021.51 $3.43 * For each class of the Fund, expenses are equal to the annualized expense ratio for the class (1.58% for Class 1, 1.04% for Class 2, .69% for Class 3 and .68% for Class 4), 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 example 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. WCMA TREASURY FUND MARCH 31, 2007 Statement of Assets and Liabilities WCMA Treasury Fund As of March 31, 2007 Assets Investment in Master Treasury Trust (the "Trust"), at value (identified cost--$411,766,354) $ 411,714,940 Prepaid expenses 38,597 --------------- Total assets 411,753,537 --------------- Liabilities Payables: Administrator $ 77,213 Distributor 69,243 146,456 --------------- Accrued expenses and other liabilities 18,811 --------------- Total liabilities 165,267 --------------- Net Assets Net assets $ 411,588,270 =============== Net Assets Consist of Class 1 Shares of beneficial interests, $.10 par value, unlimited number of shares authorized $ 1,425,805 Class 2 Shares of beneficial interests, $.10 par value, unlimited number of shares authorized 9,892,683 Class 3 Shares of beneficial interests, $.10 par value, unlimited number of shares authorized 17,174,958 Class 4 Shares of beneficial interests, $.10 par value, unlimited number of shares authorized 12,670,203 Paid-in capital in excess of par 370,472,833 Undistributed realized capital gains allocated from the Trust--net $ 3,202 Unrealized depreciation allocated from the Trust--net (51,414) --------------- Total accumulated losses--net (48,212) --------------- Net Assets $ 411,588,270 =============== Net Asset Value Class 1--Based on net assets of $14,251,321 and 14,258,047 shares of beneficial interests outstanding $ 1.00 =============== Class 2--Based on net assets of $98,905,167 and 98,926,825 shares of beneficial interests outstanding $ 1.00 =============== Class 3--Based on net assets of $171,738,619 and 171,749,582 shares of beneficial interests outstanding $ 1.00 =============== Class 4--Based on net assets of $126,693,163 and 126,702,029 shares of beneficial interests outstanding $ 1.00 =============== See Notes to Financial Statements. WCMA TREASURY FUND MARCH 31, 2007 Statement of Operations WCMA Treasury Fund For the Year Ended March 31, 2007 Investment Income Interest from affiliates $ 50,797 Net investment income allocated from the Trust: Interest and amortization of premium and discount earned 19,363,976 Expenses (1,030,087) --------------- Total income 18,384,686 --------------- Expenses Administration fees $ 990,200 Service and distribution fees--Class 2 745,147 Service and distribution fees--Class 3 654,625 Service and distribution fees--Class 4 336,862 Registration fees 209,240 Service and distribution fees--Class 1 166,345 Printing and shareholder reports 30,762 Professional fees 24,408 Transfer agent fees--Class 3 11,970 Transfer agent fees--Class 2 7,462 Transfer agent fees--Class 4 6,234 Transfer agent fees--Class 1 1,135 Other 12,634 --------------- Total expenses before waiver 3,197,024 Waiver of expenses (993,133) --------------- Total expenses after waiver 2,203,891 --------------- Investment income--net 16,180,795 --------------- Realized & Unrealized Gain Allocated from the Trust--Net Realized gain on investments--net 7,343 Change in unrealized depreciation on investments--net 111,346 --------------- Total realized and unrealized gain--net 118,689 --------------- Net Increase in Net Assets Resulting from Operations $ 16,299,484 =============== See Notes to Financial Statements. WCMA TREASURY FUND MARCH 31, 2007 Statements of Changes in Net Assets WCMA Treasury Fund For the Year Ended March 31, Increase (Decrease) in Net Assets: 2007 2006 Operations Investment income--net $ 16,180,795 $ 10,327,716 Realized gain--net 7,343 20,987 Change in unrealized depreciation--net 111,346 25,253 --------------- --------------- Net increase in net assets resulting from operations 16,299,484 10,373,956 --------------- --------------- Dividends & Distributions to Shareholders Investment income--net: Class 1 (559,201) (362,617) Class 2 (4,268,325) (2,920,261) Class 3 (7,457,120) (4,645,621) Class 4 (3,896,149) (2,399,217) Realized gain--net: Class 1 (166) (1,118) Class 2 (1,221) (6,846) Class 3 (1,940) (8,972) Class 4 (814) (4,051) --------------- --------------- Net decrease in net assets resulting from dividends and distributions to shareholders (16,184,936) (10,348,703) --------------- --------------- Beneficial Interests Transactions Net increase in net assets derived from beneficial interests transactions 19,841,800 24,835,652 --------------- --------------- Net Assets Total increase in net assets 19,956,348 24,860,905 Beginning of year 391,631,922 366,771,017 --------------- --------------- End of year $ 411,588,270 $ 391,631,922 =============== =============== See Notes to Financial Statements. WCMA TREASURY FUND MARCH 31, 2007 Financial Highlights WCMA Treasury Fund Class 1 For the Period March 20, 2003++ to The following per share data and ratios have been derived For the Year Ended March 31, March 31, from information provided in the financial statements. 2007 2006 2005 2004 2003 Per Share Operating Performance Net asset value, beginning of period $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 ----------- ----------- ----------- ----------- ----------- Investment income--net .0331 .0184 .0025 .0003 .0002 Realized and unrealized gain (loss)--net .0002 .0002 (.0004) (.0002) .0001 ----------- ----------- ----------- ----------- ----------- Total from investment operations .0333 .0186 .0021 .0001 .0003 ----------- ----------- ----------- ----------- ----------- Less dividends and distributions: Investment income--net (.0331) (.0184) (.0025) (.0003) (.0002) Realized gain--net --** (.0001) --** (.0001) -- ----------- ----------- ----------- ----------- ----------- Total dividends and distributions (.0331) (.0185) (.0025) (.0004) (.0002) ----------- ----------- ----------- ----------- ----------- Net asset value, end of period $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 =========== =========== =========== =========== =========== Total investment return 3.35% 1.87% .26% .04% .04% =========== =========== =========== =========== =========== Ratios to Average Net Assets* Total expenses, net of waiver and/or reimbursement 1.57% 1.55% 1.32% .96% .02% =========== =========== =========== =========== =========== Total expenses 1.57% 1.55% 1.56% 1.58% .02% =========== =========== =========== =========== =========== Total investment income and realized gain--net 3.32% 3.82% .25% .04% .02% =========== =========== =========== =========== =========== Supplemental Data Net assets, end of period (in thousands) $ 14,251 $ 17,407 $ 23,145 $ 26,768 $ 25 =========== =========== =========== =========== =========== * Includes the Fund's share of the Trust's allocated expenses and/or investment income and realized gain--net. ** Amount is less than $(.0001) per share. ++ Effective date of the Fund's registration. See Notes to Financial Statements. WCMA TREASURY FUND MARCH 31, 2007 Financial Highlights (continued) WCMA Treasury Fund Class 2 For the Period March 20, 2003++ to The following per share data and ratios have been derived For the Year Ended March 31, March 31, from information provided in the financial statements. 2007 2006 2005 2004 2003 Per Share Operating Performance Net asset value, beginning of period $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 ----------- ----------- ----------- ----------- ----------- Investment income--net .0385 .0241 .0060 .0007 .0002 Realized and unrealized gain (loss)--net .0003 .0001 (.0004) --*** .0001 ----------- ----------- ----------- ----------- ----------- Total from investment operations .0388 .0242 .0056 .0007 .0003 ----------- ----------- ----------- ----------- ----------- Less dividends and distributions: Investment income--net (.0385) (.0241) (.0060) (.0007) (.0002) Realized gain--net --** (.0001) --** (.0001) -- ----------- ----------- ----------- ----------- ----------- Total dividends and distributions (.0385) (.0242) (.0060) (.0008) (.0002) ----------- ----------- ----------- ----------- ----------- Net asset value, end of period $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 =========== =========== =========== =========== =========== Total investment return 3.91% 2.45% .61% .08% .04% =========== =========== =========== =========== =========== Ratios to Average Net Assets* Total expenses, net of waiver and/or reimbursement 1.04% .98% .99% .92% .02% =========== =========== =========== =========== =========== Total expenses 1.26% 1.24% 1.24% 1.25% .02% =========== =========== =========== =========== =========== Total investment income and realized gain--net 3.85% 2.42% .59% .08% .02% =========== =========== =========== =========== =========== Supplemental Data Net assets, end of period (in thousands) $ 98,905 $ 118,142 $ 123,994 $ 157,800 $ 25 =========== =========== =========== =========== =========== * Includes the Fund's share of the Trust's allocated expenses and/or investment income and realized gain--net. ** Amount is less than $(.0001) per share. *** Amount is less than $.0001 per share. ++ Effective date of the Fund's registration. See Notes to Financial Statements. WCMA TREASURY FUND MARCH 31, 2007 Financial Highlights (continued) WCMA Treasury Fund Class 3 For the Period March 20, 2003++ to The following per share data and ratios have been derived For the Year Ended March 31, March 31, from information provided in the financial statements. 2007 2006 2005 2004 2003 Per Share Operating Performance Net asset value, beginning of period $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 ----------- ----------- ----------- ----------- ----------- Investment income--net .0421 .0277 .0094 .0035 .0002 Realized and unrealized gain (loss)--net .0003 .0001 (.0004) --*** .0001 ----------- ----------- ----------- ----------- ----------- Total from investment operations .0424 .0278 .0090 .0035 .0003 ----------- ----------- ----------- ----------- ----------- Less dividends and distributions: Investment income--net (.0421) (.0277) (.0094) (.0035) (.0002) Realized gain--net --** (.0001) --** (.0001) -- ----------- ----------- ----------- ----------- ----------- Total dividends and distributions (.0421) (.0278) (.0094) (.0036) (.0002) ----------- ----------- ----------- ----------- ----------- Net asset value, end of period $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 =========== =========== =========== =========== =========== Total investment return 4.28% 2.81% .95% .36% .04% =========== =========== =========== =========== =========== Ratios to Average Net Assets* Total expenses, net of waiver and/or reimbursement .68% .63% .65% .64% .02% =========== =========== =========== =========== =========== Total expenses .96% .94% .94% .95% .02% =========== =========== =========== =========== =========== Total investment income and realized gain--net 4.23% 2.80% .95% .36% .02% =========== =========== =========== =========== =========== Supplemental Data Net assets, end of period (in thousands) $ 171,739 $ 167,197 $ 162,092 $ 168,710 $ 25 =========== =========== =========== =========== =========== * Includes the Fund's share of the Trust's allocated expenses and/or investment income and realized gain--net. ** Amount is less than $(.0001) per share. *** Amount is less than $.0001 per share. ++ Effective date of the Fund's registration. See Notes to Financial Statements. WCMA TREASURY FUND MARCH 31, 2007 Financial Highlights (concluded) WCMA Treasury Fund Class 4 For the Period March 20, 2003++ to The following per share data and ratios have been derived For the Year Ended March 31, March 31, from information provided in the financial statements. 2007 2006 2005 2004 2003 Per Share Operating Performance Net asset value, beginning of period $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 ----------- ----------- ----------- ----------- ----------- Investment income--net .0421 .0277 .0094 .0035 .0002 Realized and unrealized gain (loss)--net .0002 .0001 (.0003) --*** .0001 ----------- ----------- ----------- ----------- ----------- Total from investment operations .0423 .0278 .0091 .0035 .0003 ----------- ----------- ----------- ----------- ----------- Less dividends and distributions: Investment income--net (.0421) (.0277) (.0094) (.0035) (.0002) Realized gain--net --** (.0001) --** (.0001) -- ----------- ----------- ----------- ----------- ----------- Total dividends and distributions (.0421) (.0278) (.0094) (.0036) (.0002) ----------- ----------- ----------- ----------- ----------- Net asset value, end of period $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 =========== =========== =========== =========== =========== Total investment return 4.28% 2.81% .95% .36% .04% =========== =========== =========== =========== =========== Ratios to Average Net Assets* Total expenses, net of waiver and/or reimbursement .68% .63% .65% .65% .02% =========== =========== =========== =========== =========== Total expenses .95% .93% .93% .96% .02% =========== =========== =========== =========== =========== Total investment income and realized gain--net 4.24% 2.86% .91% .36% .02% =========== =========== =========== =========== =========== Supplemental Data Net assets, end of period (in thousands) $ 126,693 $ 88,886 $ 57,539 $ 88,849 $ 25 =========== =========== =========== =========== =========== * Includes the Fund's share of the Trust's allocated expenses and/or investment income and realized gain--net. ** Amount is less than $(.0001) per share. *** Amount is less than $.0001 per share. ++ Effective date of the Fund's registration. See Notes to Financial Statements. WCMA TREASURY FUND MARCH 31, 2007 Notes to Financial Statements WCMA Treasury Fund 1. Significant Accounting Policies: WCMA 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 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, 2007 was 47.1%. The Fund is divided into four classes, designated Class 1, Class 2, Class 3 and Class 4. Each Class 1, Class 2, Class 3 and Class 4 share represents interest in the same assets of the Fund and has identical voting, dividend, liquidation and other rights and the same terms and conditions, except that each class bears certain expenses related to the shareholder servicing and distribution of such shares and the additional incremental transfer agency costs resulting from the conversion of shares and has exclusive voting rights with respect to matters relating to such servicing and distribution expenditures. Income, expenses (other than expenses attributed to a specific class) and realized and unrealized gains and losses are allocated daily to each class based on its relative net assets. The following is a summary of significant accounting policies followed by the Fund. (a) Valuation of investments--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 are declared from the total of net investment income. Distributions of net realized gain, if any, on investments are paid at least annually. (f) Investment transactions--Investment transactions in the Trust are accounted for on a trade date basis. (g) Recent accounting pronouncements--In July 2006, the Financial Accounting Standards Board ("FASB") issued Interpretation No. 48 ("FIN 48"), "Accounting for Uncertainty in Income Taxes - an interpretation of FASB Statement No. 109." FIN 48 prescribes the minimum recognition threshold a tax position must meet in connection with accounting for uncertainties in income tax positions taken or expected to be taken by an entity, including mutual funds, before being measured and recognized in the financial statements. Adoption of FIN 48 is required for the last net asset value calculation in the first required financial statement reporting period for fiscal years beginning after December 15, 2006. The impact on the Fund's financial statements, if any, is currently being assessed. In September 2006, "Statement of Financial Accounting Standards No. 157, Fair Value Measurements" ("FAS 157"), was issued and is effective for fiscal years beginning after November 15, 2007. FAS 157 defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. At this time, management is evaluating the implications of FAS 157 and its impact on the Fund's financial statements, if any, has not been determined. In addition, in February 2007, FASB issued "Statement of Financial Accounting Standards No. 159, The Fair Value Option for Financial Assets and Financial Liabilities" ("FAS 159"), which is effective for fiscal years beginning after November 15, 2007. Early adoption is permitted as of the beginning of a fiscal year that begins on or before November 15, 2007, provided the entity also elects to apply the provisions of FAS 157. FAS 159 permits entities to choose to measure many financial instruments and certain other items at fair value that are not currently required to be measured at fair value. FAS 159 also establishes presentation and disclosure requirements designed to facilitate comparisons between entities that choose different measurement attributes for similar types of assets and liabilities. At this time, management is evaluating the implications of FAS 159 and its impact on the Fund's financial statements, if any, has not been determined. WCMA TREASURY FUND MARCH 31, 2007 Notes to Financial Statements (continued) WCMA Treasury Fund 2. Transactions with Affiliates: On September 29, 2006, BlackRock, Inc. and Merrill Lynch & Co., Inc. ("Merrill Lynch") combined Merrill Lynch's investment management business, Merrill Lynch Investment Managers, L.P. ("MLIM"), and its affiliates, including Fund Asset Management, L.P. ("FAM"), with BlackRock, Inc. to create a new independent company. Merrill Lynch has a 49.8% economic interest and a 45% voting interest in the combined company and The PNC Financial Services Group, Inc. has approximately a 34% economic and voting interest. The new company operates under the BlackRock name and is governed by a board of directors with a majority of independent members. On September 15, 2006, shareholders of the Fund approved a new Investment Advisory Agreement for the Trust with BlackRock Advisors, Inc., an indirect, wholly owned subsidiary of BlackRock, Inc. BlackRock Advisors, Inc. was recently reorganized into a limited liability company and renamed BlackRock Advisors, LLC. The new Investment Advisory Agreement became effective on September 29, 2006. Prior to September 29, 2006, FAM was the Trust's manager. The general partner of FAM is Princeton Services, Inc. ("PSI"), an indirect, wholly owned subsidiary of Merrill Lynch, which is the limited partner. The Fund has entered into an Administration Agreement with BlackRock Advisors, LLC (the "Administrator"). 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. Prior to September 29, 2006, FAM acted as the Fund's administrator and was compensated at the same fee rate. The Fund has adopted Distribution Plans in compliance with Rule 12b-1 under the Investment Company Act of 1940, pursuant to which Merrill Lynch, Pierce, Fenner & Smith Incorporated ("MLPF&S"), an affiliate of the Administrator, receives service fees and distribution fees from the Fund. The fees are accrued daily and paid monthly at annual rates based upon the average daily net assets of the shares of the Fund as follows: Service Distribution Fee Fee Class 1 .25% .75% Class 2 .25% .425% Class 3 .25% .125% Class 4 .25% .125% The ongoing service fee compensates MLPF&S for providing shareholder services to respective shareholders. The on-going distribution fee compensates MLPF&S for providing shareholder and distribution related services to respective shareholders. The Fund has entered into a contractual arrangement with the Administrator and MLPF&S to waive and/or reimburse a portion of the Fund's fees and expenses to ensure that the net expenses for the Fund's Class 2 Shares is not more than .35% higher than that of CMA Treasury Fund, and Class 3 and Class 4 Shares is equal to that of CMA Treasury Fund. The fee/expense waiver or reimbursement includes shareholder servicing and distribution fees. This arrangement has a one-year term and is renewable. The Distributor has voluntarily agreed to waive a portion of its distribution fees in order to ensure that each class of shareholders receives a positive yield on each daily dividend. For the year ended March 31, 2007, MLPF&S earned fees of $1,902,979, of which $993,133 was waived. Financial Data Services, Inc. ("FDS"), a wholly owned subsidiary of Merrill Lynch, 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 share activity, which results in uninvested net proceeds from sales of Fund shares. Prior to September 29, 2006 certain officers and/or trustees of the Fund were officers and/or directors of MLIM, FAM, PSI, FDS, and/or Merrill Lynch. Commencing September 29, 2006, certain officers and/or trustees of the Fund are officers and/or directors of BlackRock, Inc. or its affiliates. 3. Beneficial Interests Transactions: Net increase in net assets derived from beneficial interest transactions was $19,841,800 and $24,835,652 for the years ended March 31, 2007 and March 31, 2006, respectively. Transactions in shares of beneficial interests for each class were as follows: WCMA TREASURY FUND MARCH 31, 2007 Notes to Financial Statements (concluded) WCMA Treasury Fund Class 1 Shares for the Year Dollar Ended March 31, 2007 Shares Amount Shares sold 221,547,247 $ 221,547,247 Shares issued to shareholders in reinvestment of dividends and distributions 559,382 559,382 --------------- --------------- Total issued 222,106,629 222,106,629 Shares redeemed (225,266,482) (225,266,482) --------------- --------------- Net decrease (3,159,853) $ (3,159,853) =============== =============== Class 1 Shares for the Year Dollar Ended March 31, 2006 Shares Amount Shares sold 329,395,758 $ 329,395,758 Shares issued to shareholders in reinvestment of dividends and distributions 363,724 363,724 --------------- --------------- Total issued 329,759,482 329,759,482 Shares redeemed (335,500,098) (335,500,098) --------------- --------------- Net decrease (5,740,616) $ (5,740,616) =============== =============== Class 2 Shares for the Year Dollar Ended March 31, 2007 Shares Amount Shares sold 597,118,547 $ 597,118,547 Shares issued to shareholders in reinvestment of dividends and distributions 4,269,552 4,269,552 --------------- --------------- Total issued 601,388,099 601,388,099 Shares redeemed (620,662,252) (620,662,252) --------------- --------------- Net decrease (19,274,153) $ (19,274,153) =============== =============== Class 2 Shares for the Year Dollar Ended March 31, 2006 Shares Amount Shares sold 620,968,152 $ 620,968,152 Shares issued to shareholders in reinvestment of dividends and distributions 2,927,107 2,927,107 --------------- --------------- Total issued 623,895,259 623,895,259 Shares redeemed (629,756,903) (629,756,903) --------------- --------------- Net decrease (5,861,644) $ (5,861,644) =============== =============== Class 3 Shares for the Year Dollar Ended March 31, 2007 Shares Amount Shares sold 1,294,371,436 $ 1,294,371,436 Shares issued to shareholders in reinvestment of dividends and distributions 7,459,060 7,459,060 --------------- --------------- Total issued 1,301,830,496 1,301,830,496 Shares redeemed (1,297,342,256) (1,297,342,256) --------------- --------------- Net increase 4,488,240 $ 4,488,240 =============== =============== Class 3 Shares for the Year Dollar Ended March 31, 2006 Shares Amount Shares sold 1,335,060,352 $ 1,335,060,352 Shares issued to shareholders in reinvestment of dividends and distributions 4,654,593 4,654,593 --------------- --------------- Total issued 1,339,714,945 1,339,714,945 Shares redeemed (1,334,623,614) (1,334,623,614) --------------- --------------- Net increase 5,091,331 $ 5,091,331 =============== =============== Class 4 Shares for the Year Dollar Ended March 31, 2007 Shares Amount Shares sold 1,082,482,855 $ 1,082,482,855 Shares issued to shareholders in reinvestment of dividends and distributions 3,896,963 3,896,963 --------------- --------------- Total issued 1,086,379,818 1,086,379,818 Shares redeemed (1,048,592,252) (1,048,592,252) --------------- --------------- Net increase 37,787,566 $ 37,787,566 =============== =============== Class 4 Shares for the Year Dollar Ended March 31, 2006 Shares Amount Shares sold 1,020,029,299 $ 1,020,029,299 Shares issued to shareholders in reinvestment of dividends and distributions 2,403,267 2,403,267 --------------- --------------- Total issued 1,022,432,566 1,022,432,566 Shares redeemed (991,085,985) (991,085,985) --------------- --------------- Net increase 31,346,581 $ 31,346,581 =============== =============== 4. Distributions to Shareholders The tax character of distributions paid during the fiscal years ended March 31, 2007 and March 31, 2006 was as follows: 3/31/2007 3/31/2006 Distributions paid from: Ordinary income $ 16,184,936 $ 10,348,703 --------------- --------------- Total taxable distributions $ 16,184,936 $ 10,348,703 =============== =============== As of March 31, 2007, there were no significant differences between book and tax components of net assets. WCMA TREASURY FUND MARCH 31, 2007 Report of Independent Registered Public Accounting Firm WCMA Treasury Fund To the Shareholders and Board of Trustees of WCMA Treasury Fund: We have audited the accompanying statement of assets and liabilities of WCMA Treasury Fund as of March 31, 2007, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, and the financial highlights for each of the respective periods then ended. These financial statements and financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits. We conducted our audits in accordance with 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 WCMA Treasury Fund as of March 31, 2007, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and its financial highlights for each of the respective periods then ended, in conformity with accounting principles generally accepted in the United States of America. Deloitte & Touche LLP Princeton, New Jersey May 21, 2007 Important Tax Information (unaudited) The following information is provided with respect to the ordinary income distributions paid by WCMA Treasury Fund for the fiscal year ended March 31, 2007: Federal Obligation Interest Months Paid: April 2006 - March 2007 99.70%* Interest-Related Dividends for Non-U.S. Residents Months Paid: April 2006 - December 2006 99.71%** January 2007 - March 2007 99.67%** Qualified Short-Term Capital Gains for Non-U.S. Residents Months Paid: April 2006 - August 2006 0.06%** * 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. Additionally, at least 50% of the assets of the Fund were invested in federal obligations at the end of each fiscal quarter. ** Represents the portion of the taxable ordinary income dividends eligible for exemption from U.S. withholding tax for nonresident aliens and foreign corporations. WCMA TREASURY FUND MARCH 31, 2007 Portfolio Information Master Treasury Trust Portfolio Composition as a Percent of Net Assets As of 3/31/07 9/30/06 U.S. Government Obligations 99.9% 99.7% Other Assets Less Liabilities 0.1 0.3 ------ ------ Total 100.0% 100.0% ====== ====== Schedule of Investments as of March 31, 2007 Master Treasury Trust (In Thousands) Face Interest Maturity Issue Amount Rate(s) Date Value U.S. Government Obligations*--99.9% U.S. Treasury Bills $ 90,633 5.065 - 5.14 % 4/05/2007 $ 90,556 295,125 5.085 - 5.16 4/12/2007 294,579 53,579 5.13 - 5.135 4/26/2007 53,373 4,435 5.002 - 5.016 5/03/2007 4,414 74,260 4.96 - 5.065 5/10/2007 73,853 104,547 5.027 - 5.03 5/17/2007 103,893 25,444 5.043 5/24/2007 25,262 42,300 4.94 - 5.042 5/31/2007 41,960 52,170 4.905 - 4.975 6/07/2007 51,701 17,000 4.96 6/14/2007 16,831 35,500 4.931 6/21/2007 35,113 35,900 4.90 7/19/2007 35,377 22,500 4.905 8/23/2007 22,063 U.S. Treasury Notes 25,000 3.125 5/15/2007 24,937 Total Investments (Cost--$873,726**)--99.9% 873,912 Other Assets Less Liabilities--0.1% 807 ----------- Net Assets--100.0% $ 874,719 =========== * 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. ** Cost for federal income tax purposes. See Notes to Financial Statements WCMA TREASURY FUND MARCH 31, 2007 Statement of Assets and Liabilities Master Treasury Trust As of March 31, 2007 Assets Investments in unaffiliated securities, at value (identified cost--$873,726,210) $ 873,912,276 Cash 15,513 Receivables: Contributions $ 740,314 Interest 291,279 1,031,593 --------------- Prepaid expenses 9,097 --------------- Total assets 874,968,479 --------------- Liabilities Payables: Investment adviser 151,069 Other affiliates 7,920 158,989 --------------- Accrued expenses 90,677 --------------- Total liabilities 249,666 --------------- Net Assets Net assets $ 874,718,813 =============== Net Assets Consist of Investors' capital $ 874,532,747 Unrealized appreciation--net 186,066 --------------- Net Assets $ 874,718,813 =============== See Notes to Financial Statements. Statement of Operations Master Treasury Trust For the Year Ended March 31, 2007 Investment Income Interest and amortization of premium and discount earned $ 41,319,265 Expenses Investment advisory fees $ 1,853,459 Accounting services 211,488 Professional fees 46,165 Trustees' fees and expenses 37,735 Custodian fees 27,404 Pricing fees 3,594 Printing and shareholder reports 359 Other 20,829 --------------- Total expenses 2,201,033 --------------- Investment income--net 39,118,232 --------------- Realized & Unrealized Gain--Net Realized gain on investments--net 15,471 Change in unrealized appreciation/depreciation on investments--net 267,348 --------------- Total realized and unrealized gain--net 282,819 --------------- Net Increase in Net Assets Resulting from Operations $ 39,401,051 =============== See Notes to Financial Statements. WCMA TREASURY FUND MARCH 31, 2007 Statements of Changes in Net Assets Master Treasury Trust For the Year Ended March 31, Increase (Decrease) in Net Assets: 2007 2006 Operations Investment income--net $ 39,118,232 $ 27,635,472 Realized gain--net 15,471 49,565 Change in unrealized appreciation/depreciation--net 267,348 55,776 --------------- --------------- Net increase in net assets resulting from operations 39,401,051 27,740,813 --------------- --------------- Capital Transactions Proceeds from contributions 4,626,183,593 4,793,985,856 Fair value of withdrawals (4,664,402,629) (4,917,573,291) --------------- --------------- Net decrease in net assets derived from capital transactions (38,219,036) (123,587,435) --------------- --------------- Net Assets Total increase (decrease) in net assets 1,182,015 (95,846,622) Beginning of year 873,536,798 969,383,420 --------------- --------------- End of year $ 874,718,813 $ 873,536,798 =============== =============== 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. 2007 2006 2005 2004 2003 Total Investment Return Total investment return 4.70% 3.22% 1.35% .81% .60%* =========== =========== =========== =========== =========== Ratios to Average Net Assets Expenses .26% .26% .25% .23% .25%* =========== =========== =========== =========== =========== Investment income and realized gain--net 4.63% 3.14% 1.34% .82% .98%* =========== =========== =========== =========== =========== Supplemental Data Net assets, end of period (in thousands) $ 874,719 $ 873,537 $ 969,383 $ 1,115,732 $ 1,298,116 =========== =========== =========== =========== =========== * Annualized. ++ Commencement of operations. See Notes to Financial Statements. WCMA TREASURY FUND MARCH 31, 2007 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. Effective April 2, 2007, securities purchased with a maturity greater than 60 days may be valued at amortized cost. 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 trans-actions 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. (d) Recent accounting pronouncements--In July 2006, the Financial Accounting Standards Board ("FASB") issued Interpretation No. 48 ("FIN 48"), "Accounting for Uncertainty in Income Taxes - an interpretation of FASB Statement No. 109." FIN 48 prescribes the minimum recognition threshold a tax position must meet in connection with accounting for uncertainties in income tax positions taken or expected to be taken by an entity, including mutual funds, before being measured and recognized in the financial statements. Adoption of FIN 48 is required for the last net asset value calculation in the first required financial statement reporting period for fiscal years beginning after December 15, 2006. The impact on the Trust's financial statements, if any, is currently being assessed. In September 2006, "Statement of Financial Accounting Standards No. 157, Fair Value Measurements" ("FAS 157"), was issued and is effective for fiscal years beginning after November 15, 2007. FAS 157 defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. At this time, management is evaluating the implications of FAS 157 and its impact on the Trust's financial statements, if any, has not been determined. In February 2007, FASB issued "Statement of Financial Accounting Standards No. 159, The Fair Value Option for Financial Assets and Financial Liabilities" ("FAS 159"), which is effective for fiscal years beginning after November 15, 2007. Early adoption is permitted as of the beginning of a fiscal year that begins on or before November 15, 2007, provided the entity also elects to apply the provisions of FAS 157. FAS 159 permits entities to choose to measure many financial instruments and certain other items at fair value that are not currently required to be measured at fair value. FAS 159 also establishes presentation and disclosure requirements designed to facilitate comparisons between entities that choose different measurement attributes for similar types of assets and liabilities. At this time, management is evaluating the implications of FAS 159 and its impact on the Trust's financial statements, if any, has not been determined. WCMA TREASURY FUND MARCH 31, 2007 Notes to Financial Statements (concluded) Master Treasury Trust 2. Investment Advisory Agreement and Transactions with Affiliates: On September 29, 2006, BlackRock, Inc. and Merrill Lynch & Co., Inc. ("Merrill Lynch") combined Merrill Lynch's investment management business, Merrill Lynch Investment Managers, L.P. ("MLIM"), and its affiliates, including Fund Asset Management, L.P. ("FAM"), with BlackRock, Inc. to create a new independent company. Merrill Lynch has a 49.8% economic interest and a 45% voting interest in the combined company and The PNC Financial Services Group, Inc. has approximately a 34% economic and voting interest. The new company operates under the BlackRock name and is governed by a board of directors with a majority of independent members. The shareholders of each of the investors of the Trust approved on August 31, 2006 and September 15, 2006, respectively, a new Investment Advisory Agreement for the Trust with BlackRock Advisors, Inc. (the "Manager"), an indirect, wholly owned subsidiary of BlackRock, Inc., which was reorganized into a limited liability company and renamed BlackRock Advisors, LLC. The new Investment Advisory Agreement between the Trust and the Manager became effective on September 29, 2006. Prior to September 29, 2006, FAM was the Trust's manager. The general partner of FAM is Princeton Services, Inc. ("PSI"), an indirect, wholly owned subsidiary of Merrill Lynch, which is the limited partner. The Manager 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. In addition, the Manager has entered into a Sub-Advisory Agreement with BlackRock Institutional Management Corporation, an affiliate of the Manager, under which the Manager pays the Sub- Adviser for services it provides a monthly fee that is a percentage of the management fee paid by the Trust to the Manager. For the year ended March 31, 2007, the Trust reimbursed FAM and the Manager $11,283 and $7,920, respectively, for certain accounting services. Prior to September 29, 2006, certain officers and/or trustees of the Trust were officers and/or directors of FAM, PSI, and/or Merrill Lynch. Commencing September 29, 2006, certain officers and/or trustees of the Trust are officers and/or directors of BlackRock, Inc. or its affiliates. WCMA TREASURY FUND MARCH 31, 2007 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 (the "Trust") as of March 31, 2007, 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, 2007, 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, 2007, 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 high-lights for each of the respective periods then ended, in conformity with accounting principles generally accepted in the United States of America. Deloitte & Touche LLP Princeton, New Jersey May 21, 2007 Officers and Trustees Number of Funds and 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 Vice Chairman and Director of BlackRock, Inc., 122 Funds None P.O. Box 9011 and present Global Chief Investment Officer for Equities, 168 Portfolios Princeton, Trustee Chairman of the BlackRock Retail Operating NJ 08543-9011 Committee, and member of the BlackRock Age: 52 Executive Committee since 2006; President of the funds advised by Merrill Lynch Investment Managers, L.P. ("MLIM") and its affiliates ("MLIM/ FAM-advised funds") from 2005 to 2006 and Chief Investment Officer thereof from 2001 to 2006; President of MLIM and Fund Asset Management, L.P. ("FAM") from 2001 to 2006; Co-Head (Americas Region) thereof from 2000 to 2001 and Senior Vice President from 1999 to 2001; President and Director of Princeton Services, Inc. ("Princeton Services") and President of Princeton Administrators, L.P. ("Princeton Administrators") from 2001 to 2006; 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 BlackRock Advisors, LLC, and its affiliates act as investment adviser. Mr. Doll is an "interested person," as defined in the Investment Company Act, of the Fund based on his positions with BlackRock, Inc. and its affiliates. 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. WCMA TREASURY FUND MARCH 31, 2007 Officers and Trustees (continued) Number of Funds and 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* Ronald W. Forbes** Trustee 2002 to Professor Emeritus of Finance, School of 47 Funds None P.O. Box 9095 present Business, State University of New York at 49 Portfolios Princeton, Albany since 2000 and Professor thereof from NJ 08543-9095 1989 to 2000; International Consultant, Urban Age: 66 Institute, Washington, D.C. from 1995 to 1999. Cynthia A. Montgomery++ Trustee 2002 to Professor, Harvard Business School since 1989; 47 Funds Newell P.O. Box 9095 present Associate Professor, J.L. Kellogg Graduate 49 Portfolios Rubbermaid, Inc. Princeton, School of Management, Northwestern (manufacturing) NJ 08543-9095 University from 1985 to 1989; Associate Age: 54 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; Counsel 47 Funds None P.O. Box 9095 present of Alliance Capital Management (investment 49 Portfolios Princeton, adviser) in 2000; General Counsel, Director and NJ 08543-9095 Secretary of Sanford C. Bernstein & Co., Inc. Age: 61 (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 2002 to President, Middle East Institute, from 1995 to 47 Funds None P.O. Box 9095 present 2001; Foreign Service Officer, United States 49 Portfolios Princeton, Foreign Service, from 1961 to 1995 and Career NJ 08543-9095 Minister from 1989 to 1995; Deputy Inspector Age: 71 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 2002 to Professor of Finance from 1984 to 1995, 47 Funds Bowne & Co., P.O. Box 9095 present Dean from 1984 to 1993 and since 1995 49 Portfolios Inc. (financial Princeton, Dean Emeritus of New York University's printers); NJ 08543-9095 Leonard N. Stern School of Business Vornado Realty Age: 69 Administration. Trust (real estate company); Alexander's, Inc. (real estate company) * 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. ++ Chair of the Nominating Committee. WCMA TREASURY FUND MARCH 31, 2007 Officers and Trustees (concluded) 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 2003 to Managing Director of BlackRock, Inc. since 2006; Managing Director of Merrill P.O. Box 9011 President present Lynch Investment Managers, L.P. ("MLIM") and Fund Asset Management, L.P. ("FAM") Princeton, and in 2006; First Vice President of MLIM and FAM from 1997 to 2005 and Treasurer NJ 08543-9011 Treasurer thereof from 1999 to 2006; Vice President of MLIM and FAM from 1990 to 1997. Age: 46 Jeffrey Hiller Fund Chief 2004 to Managing Director of BlackRock, Inc. and Fund Chief Compliance Officer since P.O. Box 9011 Compliance present 2006; Chief Compliance Officer of the MLIM/FAM-advised funds and First Vice Princeton, Officer President and Chief Compliance Officer of MLIM (Americas Region) from 2004 to NJ 08543-9011 2006; Chief Compliance Officer of the IQ Funds since 2004; Global Director of Age: 55 Compliance at Morgan Stanley Investment Management from 2002 to 2004; 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 Securities and Exchange Commission's Division of Enforcement in Washington, D.C. from 1990 to 1995. Alice A. Pellegrino Secretary 2004 to Director of BlackRock, Inc. since 2006; Director (Legal Advisory) of MLIM from P.O. Box 9011 present 2002 to 2006; Vice President of MLIM from 1999 to 2002; Attorney associated with Princeton, MLIM from 1997 to 1999; Secretary of MLIM, FAM, FAM Distributors, Inc. and NJ 08543-9011 Princeton Services from 2004 to 2006. Age: 47 * 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 WCMA account, call 800-262-4636. Effective January 1, 2007, Edward D. Zinbarg retired as a Trustee of WCMA Treasury Fund and Master Treasury Trust. The Fund's/Trust's Board of Trustees wishes Mr. Zinbarg well in his retirement. Effective April 13, 2007, Jeffrey Hiller resigned his position as Chief Compliance Officer of the Fund/Trust. Also effective April 13, 2007, Karen Clark was appointed Chief Compliance Officer of the Fund/Trust. Ms. Clark has been a Managing Director of BlackRock, Inc. since 2007. She was a Director thereof from 2005 to 2007. Prior to that, Ms. Clark was a principal and senior compliance officer at State Street Global Advisors from 2001 to 2005. Ms. Clark was a principal consultant with PricewaterhouseCoopers, LLP from 1998 to 2001. From 1993 to 1998, Ms. Clark was Branch Chief, Division of Investment Management and Office of Compliance Inspections and Examinations, with the U.S. Securities and Exchange Commission. WCMA TREASURY FUND MARCH 31, 2007 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 at www.blackrock.com. 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 (retired as of December 31, 2006). Item 4 - Principal Accountant Fees and Services WCMA Treasury Fund (a) Audit Fees - Fiscal Year Ending March 31, 2007 - $6,600 Fiscal Year Ending March 31, 2006 - $6,600 (b) Audit-Related Fees - Fiscal Year Ending March 31, 2007 - $0 Fiscal Year Ending March 31, 2006 - $0 (c) Tax Fees - Fiscal Year Ending March 31, 2007 - $6,100 Fiscal Year Ending March 31, 2006 - $6,000 The nature of the services include tax compliance, tax advice and tax planning. (d) All Other Fees - Fiscal Year Ending March 31, 2007 - $0 Fiscal Year Ending March 31, 2006 - $0 Master Treasury Trust (a) Audit Fees - Fiscal Year Ending March 31, 2007 - $28,500 Fiscal Year Ending March 31, 2006 - $28,500 (b) Audit-Related Fees - Fiscal Year Ending March 31, 2007 - $0 Fiscal Year Ending March 31, 2006 - $0 (c) Tax Fees - Fiscal Year Ending March 31, 2007 - $9,200 Fiscal Year Ending March 31, 2006 - $9,200 The nature of the services include tax compliance, tax advice and tax planning. (d) All Other Fees - Fiscal Year Ending March 31, 2007 - $0 Fiscal Year Ending March 31, 2006 - $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 Ended March 31, 2007 - $3,016,200 Fiscal Year Ended March 31, 2006 - $3,754,550 (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) - $1,739,500, 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 - The registrant's Nominating Committee will consider nominees to the Board recommended by shareholders when a vacancy becomes available. Shareholders who wish to recommend a nominee should send nominations which include biographical information and sets forth the qualifications of the proposed nominee to the registrant's Secretary. There have been no material changes to these procedures. 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. WCMA Treasury Fund and Master Treasury Trust By: /s/ Robert C. Doll, Jr. ----------------------- Robert C. Doll, Jr., Chief Executive Officer of WCMA Treasury Fund and Master Treasury Trust Date: May 21, 2007 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 WCMA Treasury Fund and Master Treasury Trust Date: May 21, 2007 By: /s/ Donald C. Burke ------------------- Donald C. Burke, Chief Financial Officer of WCMA Treasury Fund and Master Treasury Trust Date: May 21, 2007