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: 811-09599 ---------- STATE STREET MASTER FUNDS (Exact name of registrant as specified in charter) P.O. Box 5501 Boston, Massachusetts 02206 (Address of principal executive offices)(Zip code) (Name and Address of Agent for Service) Copy to: Nancy L. Conlin, Vice President and Counsel Timothy W. Diggins, Esq. State Street Bank and Trust Company Ropes & Gray LLP 4 Copley Place One International Place Tower II- floor 3 Legal Division Boston, Massachusetts 02110-2624 Boston, Massachusetts 02116 Registrant's telephone number, including area code: (617) 662-3966 Date of fiscal year end: December 31 Date of reporting period: June 30, 2008 ITEM 1: SHAREHOLDER REPORT STATE STREET EQUITY 500 INDEX PORTFOLIO SEMI-ANNUAL REPORT JUNE 30, 2008 (UNAUDITED) STATE STREET EQUITY 500 INDEX PORTFOLIO EXPENSE EXAMPLE As a shareholder of the State Street Equity 500 Index Portfolio (the "Portfolio"), you incur ongoing costs, which include costs for portfolio management and administrative services, among others. This example is intended to help you understand your ongoing costs (in dollars) of investing in the Portfolio and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 made at the beginning of the period shown and held for the entire period from January 1, 2008 to June 30, 2008. The table below illustrates your Portfolio's costs in two ways: - BASED ON ACTUAL FUND RETURN. This section helps you to estimate the actual expenses that you paid over the period. The "Ending Account Value" shown is derived from the actual return of the Portfolio, and the third column shows the dollar amount that would have been paid by an investor who started with $1,000 in the Portfolio. You may use the information here, together with the amount you invested, to estimate the expenses that you paid over the period. To do so, simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number given for the Portfolio under the heading "Expenses Paid During Period". - BASED ON HYPOTHETICAL 5% RETURN. This section is intended to help you compare your Portfolio's costs with those of other mutual funds. It assumes that the Portfolio had a yearly return of 5% before expenses, but that the expense ratio is unchanged. In this case-because the return used is not the Portfolio's actual return- the results do not apply to your investment. The example is useful in making comparisons because the Securities and Exchange Commission requires all mutual funds to calculate expenses based on a 5% return. You can assess your Portfolio's costs by comparing this hypothetical example with the hypothetical examples that appear in shareholder reports of other funds. Six Months Ended June 30, 2008 BEGINNING ENDING ACCOUNT VALUE ACCOUNT VALUE EXPENSES PAID JANUARY 1, 2008 JUNE 30, 2008 DURING PERIOD * --------------- ------------- --------------- BASED ON ACTUAL PORTFOLIO RETURN $1,000.00 $ 880.20 $0.21 BASED ON HYPOTHETICAL (5% RETURN BEFORE EXPENSES) $1,000.00 $1,024.64 $0.23 * The calculations are based on expenses incurred in the most recent fiscal period of the Portfolio. The annualized average weighted expense ratio as of June 30, 2008 was 0.045%. The dollar amounts shown as "Expenses Paid" are equal to the annualized average weighted expense ratio multiplied by the average account value over the period, multiplied by the number of days in the most recent six-month period, then divided by the number of days in the most recent 12-month period. 1 STATE STREET EQUITY 500 INDEX PORTFOLIO PORTFOLIO STATISTICS (UNAUDITED) PORTFOLIO COMPOSITION* JUNE 30, 2008 - ---------------------- ------------- Common Stocks 97.6% Money Market Funds 1.8 U.S. Government Securities 0.1 Liabilities less cash and other assets 0.5 ----- Total 100.0% ===== TOP FIVE SECTORS (EXCLUDING SHORT-TERM INVESTMENTS)* JUNE 30, 2008 - ---------------------------------------------------- ------------- Information Technology 15.5% Energy 15.0 Financials 14.0 Health Care 11.5 Industrials 11.1 ---- Total 67.1% ==== * As a percentage of net assets as of the date indicated. The Portfolio's composition may vary over time. 2 STATE STREET EQUITY 500 INDEX PORTFOLIO PORTFOLIO OF INVESTMENTS JUNE 30, 2008 (UNAUDITED) MARKET VALUE SHARES (000) ---------- ---------- COMMON STOCKS -- 97.6% CONSUMER DISCRETIONARY -- 8.2% Abercrombie & Fitch Co. 15,846 $ 993 Amazon.Com, Inc. (a) 54,892 4,025 Apollo Group, Inc. Class A (a) 24,529 1,086 AutoNation, Inc. (a) 23,063 231 AutoZone, Inc. (a) 7,864 952 Bed Bath & Beyond, Inc. (a) 46,645 1,311 Best Buy Co., Inc. 60,719 2,404 Big Lots, Inc. (a) 12,827 401 Black & Decker Corp. 10,037 577 Carnival Corp. 77,250 2,546 CBS Corp. Class B 120,203 2,343 Centex Corp. 24,082 322 Clear Channel Communications, Inc. 88,647 3,120 Coach, Inc. (a) 63,128 1,823 Comcast Corp. Class A 527,348 10,004 D.R. Horton, Inc. 45,576 495 Darden Restaurants, Inc. 25,688 820 Dillard's, Inc. Class A 12,294 142 DIRECTV Group, Inc. (a) 128,877 3,339 Eastman Kodak Co. 54,482 786 eBay, Inc. (a) 198,703 5,431 EW Scripps Co. Class A 16,835 699 Expedia, Inc. (a) 39,215 721 Family Dollar Stores, Inc. 27,158 542 Ford Motor Co. (a) 387,098 1,862 Fortune Brands, Inc. 27,745 1,732 GameStop Corp. (a) 29,000 1,172 Gannett Co., Inc. 42,074 912 Gap, Inc. 81,298 1,355 General Motors Corp. 98,645 1,134 Genuine Parts Co. 30,809 1,223 Goodyear Tire & Rubber Co. (a) 45,257 807 H&R Block, Inc. 58,415 1,250 Harley-Davidson, Inc. 43,201 1,566 Harman International Industries, Inc. 10,521 435 Hasbro, Inc. 25,825 922 Home Depot, Inc. 301,112 7,052 Host Hotels & Resorts, Inc. 91,365 1,247 International Game Technology 55,119 1,377 Interpublic Group of Cos., Inc. (a) 83,694 720 JC Penney & Co., Inc. 40,310 1,463 Johnson Controls, Inc. 105,286 3,020 Jones Apparel Group, Inc. 13,434 185 KB HOME 14,794 250 Kohl's Corp. (a) 53,533 2,143 Leggett & Platt, Inc. 32,898 552 Lennar Corp. Class A 27,931 345 Limited Brands 50,567 852 Liz Claiborne, Inc. 20,797 294 Lowe's Cos., Inc. 259,262 5,380 Macy's, Inc. 78,723 1,529 Marriot International, Inc. Class A 52,821 1,386 Mattel, Inc. 66,976 1,147 McDonald's Corp. 202,025 11,358 MARKET VALUE SHARES (000) ---------- ---------- McGraw-Hill, Inc. 56,766 $ 2,277 Meredith Corp. 7,889 223 New York Times Co. Class A 22,922 353 Newell Rubbermaid, Inc. 51,593 866 News Corp. Class A 410,409 6,173 NIKE, Inc. Class B 68,052 4,057 Nordstrom, Inc. 30,833 934 Office Depot, Inc. (a) 51,256 561 Omnicom Group, Inc. 56,541 2,538 Polo Ralph Lauren Corp. 10,615 666 Pulte Homes, Inc. 34,526 332 Radioshack Corp. 20,203 248 Sears Holdings Corp. (a) 12,674 934 Sherwin-Williams Co. 18,396 845 Snap-On, Inc. 9,512 495 Stanley Works 14,583 654 Staples, Inc. 123,933 2,943 Starbucks Corp. (a) 128,561 2,024 Starwood Hotels & Resorts Worldwide, Inc. 33,647 1,348 Target Corp. 139,316 6,477 Tiffany & Co. 22,280 908 Time Warner, Inc. 638,473 9,449 TJX Cos., Inc. 77,106 2,427 V.F. Corp. 15,193 1,081 Viacom, Inc. Class B (a) 113,922 3,479 Walt Disney Co. 338,745 10,569 Washington Post Co. 1,060 622 Wendy's International, Inc. 17,016 463 Whirlpool Corp. 13,761 849 Wyndham Worldwide Corp. 34,299 614 Yum! Brands, Inc. 84,192 2,954 ---------- 168,146 ---------- CONSUMER STAPLES -- 10.5% Altria Group, Inc. 376,299 7,737 Anheuser-Busch Cos., Inc. 127,403 7,914 Archer-Daniels-Midland Co. 114,424 3,862 Avon Products, Inc. 77,160 2,779 Brown-Forman Corp. Class B 15,624 1,181 Campbell Soup Co. 39,265 1,314 Clorox Co. 25,743 1,344 Coca-Cola Co. 357,511 18,583 Coca-Cola Enterprises, Inc. 53,901 932 Colgate-Palmolive Co. 90,901 6,281 ConAgra Foods, Inc. 85,775 1,654 Constellation Brands, Inc. Class A (a) 37,226 739 Costco Wholesale Corp. 77,289 5,421 CVS Corp. 255,832 10,123 Dean Foods Co. (a) 25,258 496 Estee Lauder Cos, Inc. Class A 20,552 955 General Mills, Inc. 60,132 3,654 H.J. Heinz Co. 55,669 2,664 Hershey Foods Corp. 29,582 970 Kellogg Co. 45,935 2,206 Kimberly-Clark Corp. 75,900 4,537 See Notes to Financial Statements 3 STATE STREET EQUITY 500 INDEX PORTFOLIO PORTFOLIO OF INVESTMENTS - (CONTINUED) JUNE 30, 2008 (UNAUDITED) MARKET VALUE SHARES (000) ---------- ---------- CONSUMER STAPLES -- (CONTINUED) Kraft Foods, Inc. 269,122 $ 7,657 Kroger Co. 116,676 3,368 Lorillard, Inc. (a) 30,860 2,134 McCormick & Co., Inc. 22,353 797 Molson Coors Brewing Co., Class B 23,862 1,296 Pepsi Bottling Group, Inc. 22,953 641 PepsiCo, Inc. 283,156 18,006 Philip Morris International, Inc. 377,099 18,625 Procter & Gamble Co. 545,612 33,179 Reynolds American, Inc. 31,387 1,465 Safeway, Inc. 80,264 2,292 Sara Lee Corp. 129,634 1,588 SuperValu, Inc. 37,648 1,163 Sysco Corp. 106,809 2,938 Tyson Foods, Inc., Class A 46,035 688 UST Corp. 26,637 1,455 Wal-Mart Stores, Inc. 416,502 23,407 Walgreen Co. 176,718 5,745 Whole Foods Market, Inc. 25,433 602 Wrigley Wm., Jr. Co. 38,648 3,006 ---------- 215,398 ---------- ENERGY -- 15.0% Anadarko Petroleum Corp. 83,326 6,236 Apache Corp. 59,425 8,260 Baker Hughes, Inc. 54,878 4,793 BJ Services Co. 52,248 1,669 Cabot Oil & Gas Corp. 17,400 1,179 Cameron International Corp. (a) 38,000 2,103 Chesapeake Energy Corp. 85,982 5,671 ChevronTexaco Corp. 368,946 36,574 ConocoPhillips 276,030 26,054 Devon Energy Corp. 79,351 9,535 El Paso Corp. 123,192 2,678 ENSCO International, Inc. 26,077 2,105 EOG Resources, Inc. 44,317 5,814 ExxonMobil Corp. 943,272 83,131 Halliburton Co. 156,234 8,291 Hess Corp. 49,801 6,284 Marathon Oil Corp. 126,277 6,550 Murphy Oil Corp. 33,841 3,318 Nabors Industries, Ltd. (a) 48,904 2,408 National Oilwell Varco, Inc. (a) 73,557 6,526 Noble Corp. 47,918 3,113 Noble Energy, Inc. 31,210 3,139 Occidental Petroleum Corp. 146,944 13,204 Range Resources Corp. 27,200 1,783 Rowan Cos., Inc. 19,520 913 Schlumberger, Ltd. 212,675 22,848 Smith International, Inc. 35,334 2,938 Sunoco, Inc. 21,584 878 Tesoro Corp. 26,365 521 Transocean, Inc. (a) 56,635 8,631 Valero Energy Corp. 95,009 3,912 Weatherford International Ltd. (a) 120,910 5,996 MARKET VALUE SHARES (000) ---------- ---------- Williams Cos., Inc. 104,468 $ 4,211 XTO Energy, Inc. 90,821 6,222 ---------- 307,488 ---------- FINANCIALS -- 14.0% ACE, Ltd. 59,783 3,293 AFLAC, Inc. 84,490 5,306 Allstate Corp. 97,306 4,436 American Capital Strategies Ltd. 34,302 815 American Express Co. 206,364 7,774 American International Group, Inc. 479,966 12,700 Ameriprise Financial, Inc. 39,907 1,623 AON Corp. 54,747 2,515 Apartment Investment & Management Co. Class A 17,797 606 Assurant, Inc. 17,131 1,130 AvalonBay Communities, Inc. 13,353 1,191 Bank of America Corp. 795,098 18,979 Bank of New York Mellon Corp. 203,085 7,683 BB&T Corp. 96,670 2,201 Boston Properties, Inc. 21,667 1,955 Capital One Financial Corp. 66,063 2,511 CB Richard Ellis Group, Inc. Class A (a) 29,875 574 Charles Schwab Corp. 166,093 3,412 Chubb Corp. 65,575 3,214 Cincinnati Financial Corp. 28,114 714 CIT Group, Inc. 54,842 374 Citigroup, Inc. 974,402 16,331 CME Group, Inc. 9,641 3,694 Comerica, Inc. 27,144 696 Countrywide Financial Corp. 100,246 426 Developers Diversified Realty Corp. 20,024 695 Discover Financial Services 85,605 1,127 E*Trade Financial Corp. (a) 81,315 255 Equity Residential 49,057 1,877 Fannie Mae 189,550 3,698 Federal Home Loan Mortgage Corp. 117,439 1,926 Federated Investors, Inc. Class B 15,270 526 Fidelity National Information Services, Inc. 30,977 1,143 Fifth Third Bancorp 108,216 1,102 First Horizon National Corp. 38,372 285 Franklin Resources, Inc. 28,380 2,601 General Growth Properties, Inc. 48,893 1,713 Genworth Financial, Inc. Class A 79,351 1,413 Goldman Sachs Group, Inc. 70,570 12,343 Hartford Financial Services Group, Inc. 56,197 3,629 HCP, Inc. 43,100 1,371 Hudson City Bancorp, Inc. 95,292 1,590 Huntington Bancshares, Inc. 64,656 373 IntercontinentalExchange, Inc. (a) 12,680 1,446 J.P. Morgan Chase & Co. 618,015 21,204 Janus Capital Group, Inc. 26,407 699 KeyCorp 86,875 954 See Notes to Financial Statements 4 STATE STREET EQUITY 500 INDEX PORTFOLIO PORTFOLIO OF INVESTMENTS - (CONTINUED) JUNE 30, 2008 (UNAUDITED) MARKET VALUE SHARES (000) ---------- ---------- FINANCIALS -- (CONTINUED) Kimco Realty Corp. 45,869 $ 1,583 Legg Mason, Inc. 26,342 1,148 Lehman Brothers Holdings, Inc. 127,128 2,518 Leucadia National Corp. 31,136 1,462 Lincoln National Corp. 46,692 2,116 Loews Corp. 63,731 2,989 M & T Bank Corp. 14,137 997 Marsh & McLennan Cos., Inc. 91,753 2,436 Marshall & Ilsley Corp. 45,493 697 MBIA, Inc. 41,484 182 Merrill Lynch & Co., Inc. 174,490 5,533 MetLife, Inc. 126,456 6,673 MGIC Investment Corp. 18,100 111 Moody's Corp. 35,466 1,221 Morgan Stanley 197,230 7,114 National City Corp. 145,254 693 Northern Trust Corp. 33,806 2,318 NYSE Euronext 48,100 2,437 Plum Creek Timber Co., Inc. 30,811 1,316 PNC Financial Services Group, Inc. 62,951 3,595 Principal Financial Group, Inc. 46,591 1,955 Progressive Corp. 121,701 2,278 ProLogis 45,591 2,478 Prudential Financial, Inc. 77,239 4,614 Public Storage, Inc. 22,787 1,841 Regions Financial Corp. 122,289 1,334 SAFECO Corp. 15,250 1,024 Simon Property Group, Inc. 39,600 3,560 SLM Corp. (a) 83,254 1,611 Sovereign Bancorp, Inc. 85,574 630 State Street Corp. (b) 75,725 4,846 SunTrust Banks, Inc. 62,218 2,254 T. Rowe Price Group, Inc. 47,075 2,658 Torchmark Corp. 15,621 916 Travelers Cos, Inc. 107,104 4,648 U.S. Bancorp 309,152 8,622 Unum Group 61,629 1,260 Vornado Realty Trust 23,734 2,089 Wachovia Corp. 379,778 5,898 Washington Mutual, Inc. 184,441 909 Wells Fargo Co. 589,093 13,991 Western Union Co. 130,185 3,218 XL Capital, Ltd. Class A 33,044 679 Zions Bancorp 17,953 565 ---------- 287,140 ---------- HEALTH CARE -- 11.5% Abbott Laboratories 276,406 14,641 Aetna, Inc. 88,050 3,569 Allergan, Inc. 54,092 2,816 AmerisourceBergen Corp. 29,893 1,195 Amgen, Inc. (a) 194,036 9,151 Applera Corp. - Applied Biosystems Group 29,573 990 Barr Pharmaceuticals, Inc. (a) 18,923 853 MARKET VALUE SHARES (000) ---------- ---------- Baxter International, Inc. 112,561 $ 7,197 Becton, Dickinson & Co. 43,597 3,544 Biogen Idec, Inc. (a) 51,431 2,875 Boston Scientific Corp. (a) 243,834 2,997 Bristol-Myers Squibb Co. 351,338 7,213 C.R. Bard, Inc. 17,597 1,548 Cardinal Health, Inc. 64,557 3,330 Celgene Corp. (a) 77,318 4,938 CIGNA Corp. 48,796 1,727 Coventry Health Care, Inc. (a) 27,603 840 Covidien Ltd. 88,504 4,239 Eli Lilly & Co. 175,675 8,109 Express Scripts, Inc. (a) 44,699 2,804 Forest Laboratories, Inc. (a) 54,802 1,904 Genzyme Corp. (a) 48,492 3,492 Gilead Sciences, Inc. (a) 165,799 8,779 Hospira, Inc. (a) 28,503 1,143 Humana, Inc. (a) 31,507 1,253 IMS Health, Inc. 34,732 809 Intuitive Surgical, Inc. (a) 6,900 1,859 Johnson & Johnson 502,649 32,340 King Pharmaceuticals, Inc. (a) 39,792 417 Laboratory Corp. of America Holdings (a) 19,222 1,338 McKesson Corp. 48,655 2,720 Medco Health Solutions, Inc. (a) 89,568 4,228 Medtronic, Inc. 200,578 10,380 Merck & Co., Inc. 382,019 14,398 Millipore Corp. (a) 9,535 647 Mylan Laboratories Inc. (a) 51,709 624 Patterson Cos., Inc. (a) 21,594 635 Pfizer, Inc. 1,209,271 21,126 Quest Diagnostics, Inc. 28,100 1,362 Schering-Plough Corp. 288,655 5,684 St. Jude Medical, Inc. (a) 60,726 2,483 Stryker Corp. 43,389 2,728 Tenet Healthcare Corp. (a) 76,270 424 Thermo Fisher Scientific, Inc. (a) 75,524 4,209 UnitedHealth Group, Inc. 217,996 5,722 Varian Medical Systems, Inc. (a) 22,860 1,185 Watson Pharmaceuticals, Inc. (a) 17,346 471 Wellpoint, Inc. (a) 93,138 4,439 Wyeth 238,987 11,462 Zimmer Holdings, Inc. (a) 42,152 2,868 ---------- 235,705 ---------- INDUSTRIALS -- 11.1% 3M Co. 126,372 8,794 Allied Waste Industries, Inc. (a) 60,230 760 Avery Dennison Corp. 18,988 834 Boeing Co. 133,788 8,793 Burlington Northern Santa Fe Corp. 52,382 5,232 Caterpillar, Inc. 109,379 8,074 CH Robinson Worldwide, Inc. 30,461 1,671 Cintas Corp. 25,088 665 Cooper Industries, Ltd. 32,034 1,265 See Notes to Financial Statements 5 STATE STREET EQUITY 500 INDEX PORTFOLIO PORTFOLIO OF INVESTMENTS - (CONTINUED) JUNE 30, 2008 (UNAUDITED) MARKET VALUE SHARES (000) ---------- ---------- INDUSTRIALS -- (CONTINUED) CSX Corp. 71,638 $ 4,500 Cummins, Inc. 35,358 2,317 Danaher Corp. 45,086 3,485 Deere & Co. 77,737 5,607 Domtar Corp. (a) (c) 11 -- Dover Corp. 34,295 1,659 Eaton Corp. 28,795 2,447 Emerson Electric Co. 140,348 6,940 Equifax, Inc. 23,683 796 Expeditors International Washington, Inc. 37,320 1,605 FedEx Corp. 55,100 4,341 Fluor Corp. (a) 15,630 2,908 General Dynamics Corp. 71,661 6,034 General Electric Co. 1,782,233 47,568 Goodrich Co. 22,145 1,051 Honeywell International, Inc. 132,781 6,676 Illinois Tool Works, Inc. 72,471 3,443 Ingersoll-Rand Co. Class A 55,057 2,061 ITT Industries, Inc. 33,292 2,108 Jacobs Engineering Group, Inc. (a) 21,700 1,751 L-3 Communications Holdings, Inc. 22,303 2,027 Lockheed Martin Corp. 59,852 5,905 Manitowoc Co., Inc. 24,000 781 Masco Corp. 67,523 1,062 Monster Worldwide, Inc. (a) 22,609 466 Norfolk Southern Corp. 66,755 4,184 Northrop Grumman Corp. 60,811 4,068 PACCAR, Inc. 64,874 2,714 Pall Corp. 22,209 881 Parker-Hannifin Corp. 29,603 2,111 Pitney Bowes, Inc. 36,727 1,252 Precision Castparts Corp. 25,307 2,439 R.R. Donnelley & Sons Co. 38,309 1,137 Raytheon Co. 75,882 4,271 Robert Half International, Inc. 26,240 629 Rockwell Automation, Inc. 27,505 1,203 Rockwell Collins, Inc. 29,731 1,426 Ryder Systems, Inc. 9,821 677 Southwest Airlines Co. 128,486 1,675 Terex Corp. (a) 17,435 896 Textron, Inc. 45,239 2,168 Total System Services, Inc. 37,575 835 Tyco Electronics Ltd. 86,204 3,088 Tyco International Ltd. 87,761 3,514 Union Pacific Corp. 92,568 6,989 United Parcel Service, Inc. Class B 181,846 11,178 United Technologies Corp. 173,078 10,679 W.W. Grainger, Inc. 12,169 995 Waste Management, Inc. 88,439 3,335 ---------- 225,970 ---------- INFORMATION TECHNOLOGY -- 15.5% Adobe Systems, Inc. (a) 93,857 3,697 Advanced Micro Devices, Inc. (a) 114,986 670 MARKET VALUE SHARES (000) ---------- ---------- Affiliated Computer Services, Inc. Class A (a) 16,737 $ 895 Agilent Technologies, Inc. (a) 63,768 2,266 Akamai Technologies, Inc. (a) 29,424 1,024 Altera Corp. 52,854 1,094 Analog Devices, Inc. 50,269 1,597 Apple Computer, Inc. (a) 157,484 26,369 Applied Materials, Inc. 240,707 4,595 Autodesk, Inc. (a) 41,876 1,416 Automatic Data Processing, Inc. 92,817 3,889 BMC Software, Inc. (a) 35,721 1,286 Broadcom Corp. Class A (a) 78,159 2,133 CA, Inc. 68,199 1,575 CIENA Corp. (a) 14,529 337 Cisco Systems, Inc. (a) 1,055,219 24,544 Citrix Systems, Inc. (a) 33,467 984 Cognizant Technology Solutions Corp. Class A (a) 50,084 1,628 Computer Sciences Corp. (a) 25,944 1,215 Compuware Corp. (a) 41,450 395 Convergys Corp. (a) 20,035 298 Corning, Inc. 280,676 6,470 Dell, Inc. (a) 363,550 7,954 Electronic Arts, Inc. (a) 55,800 2,479 Electronic Data Systems Corp. 91,816 2,262 EMC Corp. (a) 366,084 5,378 Fiserv, Inc. (a) 29,952 1,359 Google, Inc. Class A (a) 41,490 21,841 Hewlett-Packard Co. 440,316 19,466 IAC (a) 34,889 673 Intel Corp. 1,022,956 21,973 International Business Machines Corp. 245,442 29,092 Intuit, Inc. (a) 58,463 1,612 Jabil Circuit, Inc. 39,951 656 Juniper Networks, Inc. (a) 92,093 2,043 KLA-Tencor Corp. 30,405 1,238 Lexmark International Group, Inc. Class A (a) 15,842 530 Linear Technology Corp. 40,863 1,331 LSI Logic Corp. (a) 112,662 692 MEMC Electronic Materials, Inc. (a) 40,878 2,516 Microchip Technology, Inc. 33,189 1,014 Micron Technology, Inc. (a) 142,362 854 Microsoft Corp. 1,431,835 39,390 Molex, Inc. 24,805 606 Motorola, Inc. 399,965 2,936 National Semiconductor Corp. 41,596 854 NetApp, Inc. (a) 61,157 1,325 Novell, Inc. (a) 68,720 405 Novellus Systems, Inc. (a) 20,030 424 NVIDIA Corp. (a) 100,756 1,886 Oracle Corp. (a) 707,762 14,863 Paychex, Inc. 58,038 1,815 PerkinElmer, Inc. 21,118 588 QLogic Corp. (a) 24,322 355 See Notes to Financial Statements 6 STATE STREET EQUITY 500 INDEX PORTFOLIO PORTFOLIO OF INVESTMENTS - (CONTINUED) JUNE 30, 2008 (UNAUDITED) MARKET VALUE SHARES (000) ---------- ---------- INFORMATION TECHNOLOGY -- (CONTINUED) QUALCOMM, Inc. 288,011 $ 12,779 SanDisk Corp. (a) 40,167 751 Sun Microsystems, Inc. (a) 144,741 1,575 Symantec Corp. (a) 152,663 2,954 Tellabs, Inc. (a) 73,830 343 Teradata Corp. (a) 33,520 776 Teradyne, Inc. (a) 27,649 306 Texas Instruments, Inc. 236,399 6,657 Unisys Corp. (a) 69,807 276 VeriSign, Inc. (a) 33,421 1,263 Waters Corp. (a) 16,965 1,094 Xerox Corp. 161,834 2,194 Xilinx, Inc. 52,602 1,328 Yahoo!, Inc. (a) 246,219 5,087 ---------- 316,170 ---------- MATERIALS -- 4.3% Air Products & Chemicals, Inc. 38,009 3,758 AK Steel Holding Corp. 20,000 1,380 Alcoa, Inc. 144,949 5,163 Allegheny Technologies, Inc. 17,528 1,039 Ashland, Inc. 10,700 516 Ball Corp. 17,562 838 Bemis Co., Inc. 17,262 387 Consol Energy, Inc. 32,073 3,604 Dow Chemical Co. 167,428 5,845 E.I. Du Pont de Nemours & Co. 160,412 6,880 Eastman Chemical Co. 14,204 978 Ecolab, Inc. 31,366 1,348 Freeport-McMoRan Copper & Gold, Inc. Class B 68,252 7,998 Hercules, Inc. 23,050 390 International Flavors & Fragrances, Inc. 14,331 560 International Paper Co. 76,311 1,778 Massey Energy Co. 14,300 1,341 MeadWestvaco Corp. 32,320 771 Monsanto Co. 97,955 12,385 Newmont Mining Corp. 80,406 4,194 Nucor Corp. 55,954 4,178 Pactiv Corp. (a) 23,915 508 Peabody Energy Corp. 48,324 4,255 PPG Industries, Inc. 29,871 1,714 Praxair, Inc. 55,711 5,250 Rohm & Haas Co. 21,706 1,008 Sealed Air Corp. 28,492 542 Sigma-Aldrich Corp. 23,834 1,284 Titanium Metals Corp. 16,600 232 United States Steel Corp. 20,978 3,876 Vulcan Materials Co. 19,361 1,157 Weyerhaeuser Co. 36,937 1,889 ---------- 87,046 ---------- TELECOMMUNICATION SERVICES -- 3.3% American Tower Corp. (a) 71,500 3,021 AT&T, Inc. 1,061,950 35,777 MARKET VALUE SHARES (000) ---------- ---------- CenturyTel, Inc. 20,441 $ 728 Citizens Communications Co. 60,384 685 Embarq Corp. 27,597 1,305 Fairpoint Communications, Inc. (c) 8 -- JDS Uniphase Corp. (a) 42,723 485 Qwest Communications International, Inc. 283,890 1,116 Sprint Nextel Corp. 504,565 4,793 Verizon Communications, Inc. 508,766 18,010 Windstream Corp. 79,613 982 ---------- 66,902 ---------- UTILITIES -- 4.2% AES Corp. (a) 117,495 2,257 Allegheny Energy, Inc. 30,759 1,541 Ameren Corp. 38,360 1,620 American Electric Power Co., Inc. 72,652 2,923 CenterPoint Energy, Inc. 57,611 925 CMS Energy Corp. 38,856 579 Consolidated Edison, Inc. 47,752 1,867 Constellation Energy Group, Inc. 31,414 2,579 Dominion Resources, Inc. 102,562 4,871 DTE Energy Co. 27,984 1,188 Duke Energy Corp. 224,120 3,895 Dynegy, Inc. (a) 82,690 707 Edison International 59,219 3,043 Entergy Corp. 34,098 4,108 Exelon Corp. 116,621 10,491 FirstEnergy Corp. 54,107 4,455 FPL Group, Inc. 72,421 4,749 Integrys Energy Group, Inc. 12,916 657 Nicor, Inc. 9,100 388 NiSource, Inc. 49,982 896 Pepco Holdings, Inc. 36,900 946 PG&E Corp. 64,726 2,569 Pinnacle West Capital Corp. 17,760 546 PPL Corp. 66,075 3,454 Progress Energy, Inc. 46,981 1,965 Public Service Enterprise Group, Inc. 90,124 4,139 Questar Corp. 30,268 2,150 Sempra Energy 43,786 2,472 Southern Co. 135,943 4,747 Southwestern Energy Co. (a) 61,200 2,914 Spectra Energy Corp. 111,598 3,207 TECO Energy, Inc. 35,651 766 Xcel Energy, Inc. 77,251 1,550 ---------- 85,164 ---------- TOTAL COMMON STOCKS (Cost $1,381,101,228) 1,995,129 ---------- See Notes to Financial Statements 7 STATE STREET EQUITY 500 INDEX PORTFOLIO PORTFOLIO OF INVESTMENTS - (CONTINUED) JUNE 30, 2008 (UNAUDITED) PAR MARKET AMOUNT VALUE (000) (000) ---------- ---------- U.S. GOVERNMENT SECURITIES -- 0.1% United States Treasury Bill 1.9% due 09/11/08 (d) (e) $ 2,936 $ 2,925 ---------- TOTAL U.S. GOVERNMENT SECURITIES (Cost $2,924,843) 2,925 ---------- MARKET SHARES VALUE (000) (000) ---------- ---------- MONEY MARKET FUNDS -- 1.8% AIM Short Term Investment Prime Portfolio 36,185 $ 36,185 Federated Money Market Obligations Trust 564 564 ---------- TOTAL MONEY MARKET FUNDS (Cost $36,749,196) 36,749 ---------- TOTAL INVESTMENTS -- 99.5% (identified cost $1,420,775,267)(f) 2,034,803 OTHER ASSETS IN EXCESS OF LIABILITIES -- 0.5% 10,846 ---------- NET ASSETS -- 100.0% $2,045,649 ========== (a) Non-income producing security. (b) Affiliated issuer. See table that follows for more information. (c) Amount is less than $1,000. (d) Security held as collateral in relation to initial margin requirements on futures contracts. (e) Rate represents annualized yield at date of purchase. (f) Cost of investments shown approximates cost for federal income tax purposes. See Notes to Financial Statements 8 STATE STREET EQUITY 500 INDEX PORTFOLIO PORTFOLIO OF INVESTMENTS JUNE 30, 2008 (UNAUDITED) UNREALIZED NUMBER OF DEPRECIATION CONTRACTS (000) --------- ------------ Schedule of Futures Contracts S&P 500 Financial Futures Contracts (long) Expiration Date 09/2008 791 $(2,706) ------- Total unrealized depreciation on open futures contracts purchased $(2,706) ======= AFFILIATE TABLE Income Earned Realized Shares sold for the Gain on Shares purchased for the Value at 6 months shares Security Number of shares for the 6 months 6 months Number of shares 6/30/08 ended 6/30/08 sold Description held at 12/31/07 ended 6/30/08 ended 6/30/08 held at 6/30/08 (000) (000) (000) - ----------- ---------------- ---------------- ------------- ---------------- -------- ------------- -------- State Street Corp. 70,325 9,100 3,700 75,725 $4,846 $34 $59 See Notes to Financial Statements 9 STATE STREET EQUITY 500 INDEX PORTFOLIO STATEMENT OF ASSETS AND LIABILITIES JUNE 30, 2008 (UNAUDITED) (Amounts in thousands) ASSETS Investments in unaffiliated issuers at market (identified cost $1,417,431) $2,029,957 Investments in non-controlled affiliates at market (identified cost $3,344) (Note 4) 4,846 ---------- Receivables: 2,034,803 Investment securities sold 9,502 Daily variation margin on futures contracts 40 Dividends and interest 2,763 ---------- Total assets 2,047,108 LIABILITIES Payables: Investment securities purchased 1,380 Management fees (Note 4) 79 ---------- Total liabilities 1,459 ---------- NET ASSETS $2,045,649 ========== See Notes to Financial Statements. 10 STATE STREET EQUITY 500 INDEX PORTFOLIO STATEMENT OF OPERATIONS FOR THE SIX MONTHS ENDED JUNE 30, 2008 (UNAUDITED) (Amounts in thousands) INVESTMENT INCOME Dividend income - unaffiliated issuers $ 22,512 Dividend income - non-controlled affiliated issuer 34 Interest 700 --------- Total Investment Income 23,246 --------- EXPENSES Management fees (Note 4) $ 495 --------- Total Expenses 495 --------- NET INVESTMENT INCOME 22,751 --------- REALIZED AND UNREALIZED GAIN (LOSS) Net realized gain (loss) on: Investments - unaffiliated issuers 16,145 Investments - non-controlled affiliated issuer 59 Futures contracts (3,936) --------- 12,268 Net change in net unrealized depreciation on: Investments (318,954) Futures contracts (3,381) --------- (322,335) --------- Net realized and unrealized loss (310,067) --------- NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS $(287,316) ========= See Notes to Financial Statements. 11 STATE STREET EQUITY 500 INDEX PORTFOLIO STATEMENTS OF CHANGES IN NET ASSETS (Amounts in thousands) For the Six Months Ended For the Year June 30, 2008 Ended (Unaudited) December 31, 2007 ---------------- ----------------- INCREASE (DECREASE) IN NET ASSETS FROM: OPERATIONS Net Investment Income $ 22,751 $ 53,117 Net realized gain on investments and futures contracts 12,268 169,211 Net change in net unrealized appreciation (depreciation) (322,335) (66,481) ---------- ---------- Net increase in net assets resulting from operations (287,316) 155,847 ---------- ---------- CAPITAL TRANSACTIONS Proceeds from contributions 159,368 328,812 Fair value of withdrawals (248,780) (765,322) Withdrawals in-kind -- (63,656) ---------- ---------- Net decrease in net assets from capital transactions (89,412) (500,166) ---------- ---------- TOTAL NET INCREASE (DECREASE) IN NET ASSETS (376,728) (344,319) NET ASSETS Beginning of period 2,422,377 2,766,696 ---------- ---------- End of period $2,045,649 $2,422,377 ========== ========== See Notes to Financial Statements. 12 STATE STREET EQUITY 500 INDEX PORTFOLIO FINANCIAL HIGHLIGHTS The following table includes selected supplemental data and ratios to average net assets: Six Months Ended Year Year Year Year Year 6/30/08 Ended Ended Ended Ended Ended (Unaudited) 12/31/07 12/31/06 12/31/05 12/31/04 12/31/03 ----------- ---------- ---------- ---------- ---------- ---------- SUPPLEMENTAL DATA AND RATIOS: Net assets, end of period (in thousands) $2,045,649 $2,422,377 $2,766,696 $2,453,109 $2,767,467 $2,714,672 Ratios to average net assets: Operating expenses 0.045%+ 0.045% 0.045% 0.045% 0.045% 0.045% Net investment income 2.07%+ 1.96% 1.94% 1.84% 1.97% 1.74% Portfolio turnover rate* 6%++ 12% 10% 8% 9% 12% Total return (a) (11.98)%++ 5.49% 15.75% 4.87% 10.86% 28.62% - ---------- * The portfolio turnover rate excludes in-kind security transactions. + Annualized ++ Not Annualized (a) Results represent past performance and are not indicative of future results. See Notes to Financial Statements. 13 STATE STREET EQUITY 500 INDEX PORTFOLIO NOTES TO FINANCIAL STATEMENTS JUNE 30, 2008 (UNAUDITED) 1. ORGANIZATION State Street Master Funds (the "Trust") is registered under the Investment Company Act of 1940, as amended (the "1940 Act"), as an open-end management investment company, and was organized as a business trust under the laws of The Commonwealth of Massachusetts on July 27, 1999. The Trust comprises eleven investment portfolios: the State Street Equity 500 Index Portfolio, the State Street Equity 400 Index Portfolio, the State Street Equity 2000 Index Portfolio, the State Street Aggregate Bond Index Portfolio, the State Street Money Market Portfolio, the State Street Tax Free Money Market Portfolio, the State Street Short-Term Tax Exempt Bond Portfolio, the State Street Limited Duration Bond Portfolio, the State Street Treasury Money Market Portfolio, the State Street Treasury Plus Money Market Portfolio and the State Street U.S. Government Money Market Portfolio. Information presented in these financial statements pertains only to the State Street Equity 500 Index Portfolio (the "Portfolio"). At June 30, 2008, only the Portfolio, the State Street Money Market Portfolio, the State Street Tax Free Money Market Portfolio, the State Street Short-Term Tax Exempt Bond Portfolio, the State Street Treasury Money Market Portfolio, the State Street Treasury Plus Money Market Portfolio and the State Street U.S. Government Money Market Portfolio were in operation. The Portfolio is authorized to issue an unlimited number of non-transferable beneficial interests. The Portfolio's investment objective is to replicate, as closely as possible, before expenses, the performance of the Standard & Poor's 500 Composite Stock Price Index (the "S&P 500(R) Index"). The Portfolio uses a passive management strategy designed to track the performance of the S&P 500(R) Index. The S&P 500(R) Index is a well-known, unmanaged, stock index that includes common stocks of 500 companies from several industrial sectors representing a significant portion of the market value of all stocks publicly traded in the United States. There is no assurance that the Portfolio will achieve its objective. 2. SIGNIFICANT ACCOUNTING POLICIES The following is a summary of the significant accounting policies consistently followed by the Portfolio in the preparation of its financial statements. SECURITY VALUATION: The Portfolio's investments are valued each business day by independent pricing services. Equity securities for which market quotations are available are valued at the last sale price or official closing price (closing bid price if no sale has occurred) on the primary market or exchange on which they trade. Investments in other mutual funds are valued at the net asset value per share. Fixed-income securities and options are valued on the basis of the closing bid price. Futures contracts are valued on the basis of the last sale price. Money market instruments maturing within 60 days of the valuation date are valued at amortized cost, a method by which each money market instrument is initially valued at cost, and thereafter a constant accretion or amortization of any discount or premium is recorded until maturity of the security. The Portfolio may value securities for which market quotations are not readily available at "fair value," as determined in good faith pursuant to procedures established by the Board of Trustees. The Portfolio adopted Financial Accounting Standards Board Statement of Financial Accounting Standards No. 157, Fair Value Measurements ("FAS 157"), effective for financial statements issued for fiscal years beginning after November 15, 2007 and interim periods within those fiscal years. In accordance with FAS 157, fair value is defined as the price that the portfolio would receive upon selling an investment in a timely transaction to an independent buyer in the principal or most advantageous market of the investment. Various inputs are used in determining the value of the Fund's investments. FAS 157 established a three tier hierarchy of inputs to establish a classification of fair value measurements and disclosure. The three tier hierarchy of inputs is summarized below: - Level 1 - quoted prices in active markets for identical securities - Level 2 - other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.) - Level 3 - significant unobservable inputs (including the Fund's own assumptions in determining the fair value of investments) 14 STATE STREET EQUITY 500 INDEX PORTFOLIO NOTES TO FINANCIAL STATEMENTS (CONTINUED) JUNE 30, 2008 (UNAUDITED) The inputs or methodology used for valuing securities are not an indication of the risk associated with investing in those securities. The following is a summary of the inputs used, as of June 30, 2008, in valuing the Fund's assets carried at fair value: INVESTMENTS IN OTHER FINANCIAL VALUATION INPUTS SECURITIES INSTRUMENTS* - ---------------- -------------- --------------- Level 1 - Quoted Prices $1,995,129,310 $(2,705,707) Level 2 - Other Significant Observable Inputs 39,674,039 -- Level 3 - Significant Unobservable Inputs -- -- -------------- ----------- TOTAL $2,034,803,349 $(2,705,707) ============== =========== * Other financial instruments include futures contracts. SECURITIES TRANSACTIONS, INVESTMENT INCOME AND EXPENSES: Securities transactions are recorded on a trade date basis for financial statement purposes. Dividend income is recorded on the ex-dividend date. Interest income is recorded daily on the accrual basis and includes amortization of premium and accretion of discount on investments. Realized gains and losses from securities transactions are recorded on the basis of identified cost. Expenses are accrued daily based on average daily net assets. All of the net investment income and realized and unrealized gains and losses from the security transactions of the Portfolio are allocated pro rata among the partners in the Portfolio based on each partner's daily ownership percentage. FEDERAL INCOME TAXES: The Portfolio is not required to pay federal income taxes on its net investment income and net capital gains because it is treated as a partnership for federal income tax purposes. All interest, dividends, gains and losses of the Portfolio are deemed to have been "passed through" to the Portfolio's partners in proportion to their holdings in the Portfolio, regardless of whether such items have been distributed by the Portfolio. Each partner is responsible for tax liability based on its distributive share; therefore, no provision has been made for federal income taxes. The Portfolio adopted the provisions of Financial Accounting Standards Board Interpretation No. 48 (FIN 48), "Accounting for Uncertainty in Income Taxes", on June 29, 2007. As of and during the period ended June 30, 2008, the Portfolio did not have a liability for any unrecognized tax expenses. The Portfolio recognizes interest and penalties, if any, related to tax liabilities as income tax expense in the Statement of Operations. As of June 30, 2008, tax years 2004 through 2007 remain subject to examination by the portfolio's major tax jurisdictions, which include the United States of America and the Commonwealth of Massachusetts. FUTURES: The Portfolio may enter into financial futures contracts as part of its strategy to track the performance of the S&P 500(R) Index. Upon entering into a futures contract, the Portfolio is required to deposit with the broker cash or securities in an amount equal to a certain percentage of the contract amount. Variation margin payments are made or received by the Portfolio each day, depending on the daily fluctuations in the value of the underlying security or index, and are recorded for financial statement purposes as unrealized gains or losses by the Portfolio. The Portfolio recognizes a realized gain or loss when the contract is closed. The Portfolio voluntarily segregates securities in an amount equal to the outstanding value of the open futures contracts in accordance with Securities and Exchange Commission requirements. The primary risks associated with the use of futures contracts are an imperfect correlation between the change in market value of the securities held by the Portfolio and the prices of futures contracts and the possibility of an illiquid market. USE OF ESTIMATES: The Portfolio's financial statements are prepared in accordance with U.S. generally accepted accounting principles that require the use of management estimates. Actual results could differ from those estimates. 15 STATE STREET EQUITY 500 INDEX PORTFOLIO NOTES TO FINANCIAL STATEMENTS (CONTINUED) JUNE 30, 2008 (UNAUDITED) 3. SECURITIES TRANSACTIONS For the six months June 30, 2008, purchases and sales of investment securities, excluding short-term investments, futures contracts, and contributions in-kind and fair value of withdrawals, aggregated to $126,676,195 and $203,832,247, respectively. At June 30, 2008, the book cost of investments was $1,420,775,267 which approximates cost computed on a federal tax basis. The aggregate gross unrealized appreciation and gross unrealized depreciation was $761,630,535 and $147,602,453, respectively, resulting in net appreciation of $614,028,082 for all securities as computed on a federal income tax basis. The difference between book and tax cost amounts are primarily due to wash sale loss deferrals. 4. RELATED PARTY FEES AND TRANSACTIONS The Portfolio has entered into an investment advisory agreement with SSgA Funds Management, Inc. ("SSgA FM" or the "Adviser"), a subsidiary of State Street Corp. and an affiliate of State Street Bank and Trust Company ("State Street"), under which SSgA FM directs the investments of the Portfolio in accordance with its investment objective, policies, and limitations. The Trust has contracted with State Street to provide custody, administration and transfer agent services to the Portfolio. In compensation for SSgA FM's services as investment adviser and for State Street's services as administrator, custodian and transfer agent (and for assuming ordinary operating expenses of the Portfolio, including ordinary legal, audit and trustees expense), State Street receives a unitary fee, calculated daily, at the annual rate of 0.045% of the Portfolio's average daily net assets. Certain investments made by the Portfolio were made in securities affiliated with State Street and SSgA FM. Investments in State Street Corp., the holding company of State Street, were made according to its representative portion of the S&P 500(R) Index. The market value of this investment at June 30, 2008 is listed in the Portfolio of Investments. 5. TRUSTEES' FEES Pursuant to certain agreements with State Street and its affiliates, each Independent Trustee receives for his or her services a $30,000 retainer in addition to $2,500 for each in-person meeting and $500 for each telephonic meeting from State Street or its affiliates. 6. INDEMNIFICATIONS The Trust's organizational documents provide that its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust. In addition, both in some of its principal service contracts and in the normal course of its business, the Trust enters into contracts that provide indemnifications to other parties for certain types of losses or liabilities. The Trust's maximum exposure under these arrangements is unknown as this could involve future claims against the Trust. Management does not expect any significant claims. 7. NEW ACCOUNTING PRONOUNCEMENTS In March 2008, the Financial Accounting Standards board ("FASB") issued Statement of Financial Accounting Standards No. 161, "Disclosures about Derivative Instruments and Hedging Activities" ("SFAS 161"). SFAS 161 is effective for fiscal years and interim periods beginning after November 15, 2008. SFAS 161 requires enhanced disclosures about Funds' derivative and hedging activities. Management is currently evaluating the impact the adoption of SFAS 161 will have on the Funds' financial statement disclosures. 16 STATE STREET EQUITY 500 INDEX PORTFOLIO JUNE 30, 2008 GENERAL INFORMATION (UNAUDITED) PROXY VOTING POLICIES AND PROCEDURES AND RECORD The Trust has adopted proxy voting procedures relating to portfolio securities held by the Portfolio. A description of the policies and procedures are available (i) without charge, upon request, by calling (877) 521-4083 or (ii) on the website of the Securities and Exchange Commission (the "SEC") at www.sec.gov. Information on how the Portfolio voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is available by August 31 (i) without charge, upon request, by (i) calling (877) 521-4083 or (ii) on the SEC's website at www.sec.gov. QUARTERLY PORTFOLIO SCHEDULE The Trust files a complete schedule of portfolio holdings with the SEC for the first and third quarters of its fiscal year (as of March and September of each year) on Form N-Q. The Trust's Forms N-Q are available on the SEC's website at www.sec.gov. The Trust's Forms N-Q may be reviewed and copied at the SEC's Public Reference Room in Washington, D.C. and information on the operation of the Public Reference Room may be obtained by calling 1-800-SEC-0330. The most recent Form N-Q is available without charge, upon request, by calling (877) 521-4083. 17 TRUSTEES Michael F. Holland William L. Boyan Rina K. Spence Douglas T. Williams James E. Ross INVESTMENT ADVISER SSgA Funds Management, Inc. State Street Financial Center One Lincoln Street Boston, MA 02111 ADMINISTRATOR, CUSTODIAN AND TRANSFER AGENT State Street Bank and Trust Company State Street Financial Center One Lincoln Street Boston, MA 02110 INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM Ernst & Young LLP 200 Clarendon Street Boston, MA 02116 LEGAL COUNSEL Ropes & Gray LLP One International Place Boston, MA 02110 This report is for shareholder information. This is not a prospectus intended for use in the purchase or sale of shares of beneficial interest. STATE STREET EQUITY 500 INDEX PORTFOLIO State Street Bank and Trust Company P.O. Box 5049 Boston, MA 02206 18 STATE STREET MASTER FUNDS SEMI-ANNUAL REPORT JUNE 30, 2008 (UNAUDITED) STATE STREET MONEY MARKET PORTFOLIO STATE STREET TAX FREE MONEY MARKET PORTFOLIO STATE STREET U.S. GOVERNMENT MONEY MARKET PORTFOLIO STATE STREET TREASURY MONEY MARKET PORTFOLIO STATE STREET TREASURY PLUS MONEY MARKET PORTFOLIO STATE STREET MASTER FUNDS EXPENSE EXAMPLE As a shareholder of the below listed Portfolios, you incur ongoing costs, which include costs for portfolio management and administrative services, among others. This example is intended to help you understand your ongoing costs (in dollars) of investing in the Portfolio and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 made at the beginning of the period shown and held for the entire period from January 1, 2008 to June 30, 2008. The table below illustrates your Portfolio's costs in two ways: - BASED ON ACTUAL FUND RETURN. This section helps you to estimate the actual expenses that you paid over the period. The "Ending Account Value" shown is derived from the Portfolio's actual return, and the third column shows the dollar amount that would have been paid by an investor who started with $1,000 in the Portfolio. You may use the information here, together with the amount you invested, to estimate the expenses that you paid over the period. To do so, simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number given for the Portfolio under the heading "Expenses Paid During Period". - BASED ON HYPOTHETICAL 5% RETURN. This section is intended to help you compare your Portfolio's costs with those of other mutual funds. It assumes that the Portfolio had a yearly return of 5% before expenses, but that the expense ratio is unchanged. In this case- because the return used is not the Portfolio's actual return- the results do not apply to your investment. The example is useful in making comparisons because the Securities and Exchange Commission requires all mutual funds to calculate expenses based on a 5% return. You can assess your Portfolio's costs by comparing this hypothetical example with the hypothetical examples that appear in shareholder reports of other funds. Six Months Ended June 30, 2008 BEGINNING ENDING EXPENSES PAID ACCOUNT VALUE ACCOUNT VALUE DURING JANUARY 1, 2008 JUNE 30, 2008 PERIOD* --------------- ------------- ------------- BASED ON ACTUAL PORTFOLIO RETURN Money Market Portfolio $1,000.00 $1,016.60 $0.50 Tax Free Money Market Portfolio $1,000.00 $1,012.40 $0.50 U.S. Government Money Market Portfolio $1,000.00 $1,013.80 $0.65 Treasury Money Market Portfolio $1,000.00 $1,008.50 $0.65 Treasury Plus Money Market Portfolio $1,000.00 $1,011.10 $0.70 1 BEGINNING ENDING EXPENSES PAID ACCOUNT VALUE ACCOUNT VALUE DURING JANUARY 1, 2008 JUNE 30, 2008 PERIOD* --------------- ------------- ------------- BASED ON HYPOTHETICAL (5% RETURN BEFORE EXPENSES) Money Market Portfolio $1,000.00 $1,024.37 $0.50 Tax Free Money Market Portfolio $1,000.00 $1,024.37 $0.50 U.S. Government Money Market Portfolio $1,000.00 $1,024.22 $0.65 Treasury Money Market Portfolio $1,000.00 $1,024.22 $0.65 Treasury Plus Money Market Portfolio $1,000.00 $1,024.17 $0.70 * The calculations are based on expenses incurred in the most recent fiscal period of the Portfolio. The Portfolio's annualized average weighted expense ratio as of June 30, 2008 was as follows: Money Market Portfolio 0.10% Tax Free Money Market Portfolio 0.10% U.S. Government Money Market Portfolio 0.13% Treasury Money Market Portfolio 0.13% Treasury Plus Money Market Portfolio 0.14% The dollar amounts shown as "Expenses Paid" are equal to the annualized average weighted expense ratio multiplied by the average account value over the period, multiplied by the number of days in the most recent six-month period, then divided by the number of days in the most recent 12-month period. 2 STATE STREET MONEY MARKET PORTFOLIO PORTFOLIO STATISTICS (UNAUDITED) PORTFOLIO COMPOSITION* JUNE 30, 2008 - ---------------------- ------------- Yankee Certificates of Deposit 45.4% Repurchase Agreements 19.7 Commercial Paper 10.3 Euro Certificates of Deposit 9.6 Bank Notes 6.1 Medium Term Notes 4.8 Certificates of Deposit 2.0 Master Note 1.2 Promissory Notes 0.6 Other assets less liabilities 0.3 ------ Total 100.00% ====== MATURITY LADDER JUNE 30, 2008 - --------------- ------------- 0-3 Days 26.0% 4-90 Days 65.3 90+ Days 8.7 ----- Total 100.0% ===== Average maturity 40 Days * As a percentage of net assets as of the date indicated. The Portfolio's composition will vary over time. 3 STATE STREET MONEY MARKET PORTFOLIO PORTFOLIO OF INVESTMENTS JUNE 30, 2008 (UNAUDITED) INTEREST MATURITY PRINCIPAL AMORTIZED NAME OF ISSUER AND TITLE OF ISSUE RATE DATE AMOUNT COST+ - --------------------------------- -------- ---------- -------------- -------------- COMMERCIAL PAPER - 10.3% BANK DOMESTIC - 4.7% Bank of America Corp. 2.615% 10/02/2008 $ 100,000,000 $ 99,324,458 JPMorgan Chase & Co. 2.500% 08/12/2008 300,000,000 299,125,000 -------------- 398,449,458 -------------- BANK FOREIGN - 1.6% CBA (Delaware) Finance, Inc. 2.730% 07/03/2008 37,488,000 37,482,314 CBA (Delaware) Finance, Inc. 2.730% 07/07/2008 100,000,000 99,954,500 -------------- 137,436,814 -------------- FINANCE CAPTIVE CONSUMER - 4.0% General Electric Capital Corp. 2.830% 12/18/2008 350,000,000 345,322,639 -------------- TOTAL COMMERCIAL PAPER 881,208,911 -------------- CERTIFICATES OF DEPOSIT - 2.0% BANK DOMESTIC - 2.0% Citibank 2.980% 07/23/2008 175,000,000 175,000,000 -------------- TOTAL CERTIFICATES OF DEPOSIT 175,000,000 -------------- YANKEE CERTIFICATES OF DEPOSIT - 45.4% BANK FOREIGN - 45.4% ABN AMRO Bank 2.640% 08/15/2008 250,000,000 250,001,552 Australia New Zealand Cayman 2.700% 07/17/2008 120,000,000 120,000,000 Banco Santander 2.750% 07/17/2008 100,000,000 100,000,000 Banco Santander 2.770% 08/12/2008 250,000,000 250,000,000 Bank of Nova Scotia 2.550% 07/15/2008 150,000,000 150,000,000 Bank of Nova Scotia 2.710% 07/03/2008 200,000,000 200,000,000 Barclays Bank PLC(a) 2.805% 07/14/2008 125,000,000 125,000,000 Barclays Bank PLC 3.150% 07/30/2008 100,000,000 100,000,000 BNP Paribas 2.710% 09/12/2008 300,000,000 300,000,000 BNP Paribas 2.710% 10/27/2008 100,000,000 100,000,000 Calyon NY 2.920% 07/07/2008 100,000,000 99,999,959 Dexia Credit Local NY 2.755% 07/14/2008 250,000,000 250,000,448 Fortis Bank New York 2.700% 09/12/2008 150,000,000 150,000,000 Lloyds Bank 2.610% 08/19/2008 100,000,000 100,001,352 Rabobank Nederland 2.630% 08/18/2008 350,000,000 350,000,000 Royal Bank of Scotland 2.690% 09/22/2008 300,000,000 300,003,427 Societe Generale NY 2.750% 10/22/2008 200,000,000 200,000,000 Societe Generale NY 2.850% 09/10/2008 100,000,000 100,000,000 Svenska Handelsbanken AB 2.705% 07/17/2008 100,000,000 100,000,221 Toronto Dominion Bank 2.740% 09/23/2008 200,000,000 200,000,000 UBS AG Stamford CT 2.810% 07/11/2008 100,000,000 100,000,000 See Notes to Financial Statements 4 STATE STREET MONEY MARKET PORTFOLIO PORTFOLIO OF INVESTMENTS JUNE 30, 2008 (UNAUDITED) INTEREST MATURITY PRINCIPAL AMORTIZED NAME OF ISSUER AND TITLE OF ISSUE RATE DATE AMOUNT COST+ - --------------------------------- -------- ---------- -------------- -------------- YANKEE CERTIFICATES OF DEPOSIT (CONTINUED) BANK FOREIGN (CONTINUED) UBS AG Stamford CT 2.940% 07/03/2008 $ 250,000,000 $ 250,000,034 -------------- TOTAL YANKEE CERTIFICATES OF DEPOSIT 3,895,006,993 -------------- EURO CERTIFICATES OF DEPOSIT - 9.6% BANK FOREIGN - 9.6% Australia New Zealand Cayman 2.750% 09/16/2008 200,000,000 200,000,000 Credit Agricole SA 2.710% 09/02/2008 250,000,000 250,000,000 ING Bank Amsterdam 2.800% 07/14/2008 75,000,000 75,000,000 ING Bank Amsterdam 2.900% 07/07/2008 300,000,000 300,000,000 -------------- TOTAL EURO CERTIFICATES OF DEPOSIT 825,000,000 -------------- BANK NOTES - 6.1% BANK DOMESTIC - 3.5% Bank of America(b) 2.750% 09/15/2008 300,000,000 300,000,000 -------------- 300,000,000 -------------- BANK FOREIGN - 2.6% BNP Paribas(a)(b) 2.719% 08/19/2008 25,000,000 25,000,000 Lloyds TSB Group PLC(a)(b) 2.440% 07/07/2008 100,000,000 100,000,000 Svenska Handelsbanken(a)(b) 2.471% 07/21/2008 100,000,000 100,000,000 -------------- 225,000,000 -------------- TOTAL BANK NOTES 525,000,000 -------------- MASTER NOTE - 1.2% Goldman Sachs Group, Inc.(a)(c) 3.182% 07/21/2008 100,000,000 100,000,000 -------------- Total MASTER NOTE 100,000,000 -------------- MEDIUM TERM NOTES - 4.8% BANK DOMESTIC - 2.0% American Express Credit Corp.(a) 2.492% 07/21/2008 20,000,000 20,000,000 JPMorgan Chase & Co.(a) 2.449% 07/02/2008 50,000,000 50,000,000 Procter & Gamble International Funding SCA(a) 2.789% 08/19/2008 24,000,000 24,000,000 Wells Fargo Company(a) 2.631% 07/18/2008 50,000,000 50,000,000 Wells Fargo Company(a) 2.631% 07/18/2008 30,000,000 30,000,000 -------------- 174,000,000 -------------- BANK FOREIGN - 2.8% Alliance & Leicester PLC(a)(b) 2.493% 07/31/2008 35,000,000 35,000,000 Bank of Scotland PLC(a)(b) 2.448% 07/09/2008 25,000,000 25,000,000 Caja de Ahorros y Monte de Piedad de Madrid(a)(b) 2.968% 07/21/2008 30,000,000 30,000,000 National Australia Bank Ltd.(a)(b) 2.448% 07/07/2008 20,000,000 20,000,000 UniCredito Italiano Bank Ireland PLC(a)(b) 2.501% 07/15/2008 15,000,000 15,000,000 See Notes to Financial Statements 5 STATE STREET MONEY MARKET PORTFOLIO PORTFOLIO OF INVESTMENTS JUNE 30, 2008 (UNAUDITED) INTEREST MATURITY PRINCIPAL AMORTIZED NAME OF ISSUER AND TITLE OF ISSUE RATE DATE AMOUNT COST+ - --------------------------------- -------- ---------- -------------- -------------- MEDIUM TERM NOTES (CONTINUED) BANK FOREIGN (CONTINUED) Westpac Banking Corp.(a)(b) 2.440% 07/07/2008 $ 100,000,000 $ 100,000,000 Westpac Banking Corp.(a)(b) 2.471% 07/16/2008 15,000,000 15,000,000 -------------- 240,000,000 -------------- TOTAL MEDIUM TERM NOTES 414,000,000 -------------- PROMISSORY NOTE - 0.6% Goldman Sachs Group, Inc.(a)(c) 4.100% 07/15/2008 50,000,000 50,000,000 -------------- Total PROMISSORY NOTE 50,000,000 -------------- REPURCHASE AGREEMENTS - 19.7% Bank of America Tri Party Repo, dated 06/30/08 (collateralized by Federal Home Loan Mortgage Corporation, 0.000% due 12/05/08 valued at $16,039,958); proceeds $15,726,005 2.300% 07/01/2008 15,725,000 15,725,000 Bank of America Tri Party Repo, dated 06/30/08 (collateralized by Federal National Mortgage Associations, 5.500% due 06/01/33 valued at $408,000,000); proceeds $400,027,778 2.500% 07/01/2008 400,000,000 400,000,000 Credit Suisse First Boston Tri Party Repo, dated 06/30/08 (collateralized by Corporate Notes, 5.250% - 8.812% due 05/15/09 - 05/23/37 valued at $78,520,429); proceeds $75,005,521 2.650% 07/01/2008 75,000,000 75,000,000 JP Morgan Chase Tri Party Repo, dated 06/30/08 (collateralized by Government National Mortgage Association, 4.500% - 6.000% due 07/20/31 - 11/20/35, Federal National Mortgage Association, 2.983% - 7.000% due 07/01/16 - 05/01/38, and Federal Home Loan Mortgage Corporation 3.021% - 22.120% due 11/01/10 - 04/01/38 valued at $408,000,000); proceeds $400,030,000 2.700% 07/01/2008 400,000,000 400,000,000 Salomon Brothers Tri Party Repo, dated 06/30/08 (collateralized by Federal National Mortgage Association, 6.000% due 11/01/36 -10/01/37 valued at $408,003,280); proceeds $400,030,000 2.700% 07/01/2008 400,000,000 400,000,000 UBS Warburg Tri Party Repo, dated 06/30/08 (collateralized by Federal National Mortgage Association, 3.500% - 12.500% due 07/01/08 - 06/01/48 valued at $408,004,734); proceeds $400,030,556 2.750% 07/01/2008 400,000,000 400,000,000 -------------- TOTAL REPURCHASE AGREEMENTS 1,690,725,000 -------------- TOTAL INVESTMENTS(d) - 99.7% 8,555,940,904 OTHER ASSETS IN EXCESS OF LIABILITIES - 0.3% 26,863,984 -------------- NET ASSETS - 100.0% $8,582,804,888 ============== - ---------- (a) Floating Rate Note- Interest rate shown is rate in effect at June 30, 2008 with next reset date. See Notes to Financial Statements 6 STATE STREET MONEY MARKET PORTFOLIO PORTFOLIO OF INVESTMENTS JUNE 30, 2008 (UNAUDITED) (b) Security subject to restrictions on resale under federal securities laws, which may only be resold upon registration under the Securities Act of 1933, as amended ("1933 Act") or in transactions exempt from registration, including sales to qualified institutional buyers pursuant to Rule 144A of the 1933 Act. The Portfolio does not have the right to demand that this security be registered. (c) Security subject to restrictions on resale that has been deemed by the Adviser to be illiquid. The Portfolio may not invest more than 10% of its net assets in illiquid securities. At June 30, 2008, this security represents 1.7% of net assets. (d) Also represents the cost for federal tax purposes. + See Note 2 to the Notes to Financial Statements. See Notes to Financial Statements 7 STATE STREET TAX FREE MONEY MARKET PORTFOLIO PORTFOLIO STATISTICS (UNAUDITED) PORTFOLIO COMPOSITION* JUNE 30, 2008 - ---------------------- ------------- Health 22.3% Education 21.7 General Obligations 17.2 Pre Refunded/Escrow to Maturity 6.0 Transportation 5.6 Utility 5.3 Electric Power 4.8 Housing Revenue 3.5 Industrial Revenue/Pollution Control Revenue 3.5 Portfolio Revenue 2.0 Public Agency 2.0 Airport 1.8 Water Revenue 1.6 Water & Sewer 1.5 Other Revenue 1.0 Municipals 0.2 ----- Total 100.0% ===== MATURITY LADDER JUNE 30, 2008 - --------------- ------------- 0-3 Days 77.3% 4-90 Days 1.3% 90+ Days 21.4 ----- Total 100.0% ===== Average maturity 39 Days * The Portfolio's composition will vary over time. See Notes to Financial Statements 8 STATE STREET TAX FREE MONEY MARKET PORTFOLIO SCHEDULE OF INVESTMENTS - JUNE 30, 2008 (UNAUDITED) DATE PRINCIPAL RATE OF VALUE AMOUNT % MATURITY $ ------------ ---- ---------- ------------ SHORT-TERM TAX-EXEMPT OBLIGATIONS - 93.3% ALABAMA - 1.7% Lower Alabama Gas District Supply Revenue Bonds, Series A, LIQ: Societe Generale(a) 3,800,000 1.40 07/03/2008 3,800,000 Montgomery Alabama Waterworks & Sanitary Sewer Board Revenue Bonds, Series 881, INS: FSA, LIQ: JP Morgan Chase Bank(a) 5,230,000 1.63 07/03/2008 5,230,000 ------------ 9,030,000 ------------ ARIZONA - 3.3% Austin Trust Various States Revenue Bonds, Series 2008-1151, LIQ: Bank of America N.A.(a) 8,990,000 1.60 07/03/2008 8,990,000 City of Scottsdale Arizona, GO Unlimited(b) 3,000,000 5.50 07/01/2009 3,118,043 Salt Verde Financial Corporation Gas Revenue Bonds, PUTTERS, Series 2267, LIQ: JP Morgan Chase Bank(a) 5,200,000 1.60 07/03/2008 5,200,000 ------------ 17,308,043 ------------ CALIFORNIA - 0.8% California School Cash Reserve Program Authority, COPs, Series A, LOC: Bank NA 2,000,000 3.00 07/06/2009 2,027,020 Metropolitan Water District of Southern California Waterworks Revenue Bonds, Series A, SPA: Landesbank Baden-Wuerttemberg(a) 2,165,000 1.28 07/03/2008 2,165,000 ------------ 4,192,020 ------------ COLORADO - 5.9% City of Colorado Springs Colorado Utilities Revenue Bonds, Sub Lien Improvement, Series A, SPA: Dexia Credit Local(a) 18,500,000 1.50 07/03/2008 18,500,000 City of Colorado Springs Colorado Utilities Revenue Bonds, Sub Lien, Series A, SPA: Dexia Credit Local(a) 3,925,000 1.50 07/03/2008 3,925,000 Southern Ute Indian Tribe of Southern Ute Indian Reservation Revenue Bonds(a) 8,200,000 1.55 07/03/2008 8,200,000 ------------ 30,625,000 ------------ CONNECTICUT - 4.0% Connecticut State HEFA Revenue Bonds, Yale University, Series U2(a) 10,500,000 1.27 07/02/2008 10,500,000 State of Connecticut, GO Unlimited, Series A 10,000,000 2.25 04/15/2009 10,047,476 ------------ 20,547,476 ------------ See Notes to Financial Statements 9 STATE STREET TAX FREE MONEY MARKET PORTFOLIO SCHEDULE OF INVESTMENTS - JUNE 30, 2008 (UNAUDITED) DATE PRINCIPAL RATE OF VALUE AMOUNT % MATURITY $ ------------ ---- ---------- ------------ DELAWARE - 0.3% Delaware State EDA, Hospital Billing, Series A, LOC: JP Morgan Chase Bank(a) 1,500,000 1.62 07/02/2008 1,500,000 ------------ DISTRICT OF COLUMBIA - 1.8% District of Columbia Revenue Bonds, ROCs RR II R-11247, INS: BHAC-CR MBIA, LIQ: Citibank N.A.(a) 9,500,000 1.58 07/03/2008 9,500,000 ------------ FLORIDA - 3.6% Austin Trust Various States, COPs, Series 2007-138, INS: Assured Guaranty AMBAC, LIQ: Bank of America N.A.(a) 9,900,000 1.60 07/03/2008 9,900,000 Jacksonville Florida Health Facilities Authority Hospital Revenue Bonds, Baptist Medical - RNKT, LOC: Bank of America N.A.(a) 3,500,000 2.50 07/01/2008 3,500,000 Orlando Florida Utilities Commission Water & Electric Revenue Bonds, Series B, SPA: Suntrust Bank(a) 5,400,000 1.52 07/02/2008 5,400,000 ------------ 18,800,000 ------------ GEORGIA - 6.0% Hall County Gainesville Georgia Hospital Authority Revenue Bonds, ANTIC Certificates, Northeast Health, Series B, INS: MBIA, SPA: Landesbank Baden-Wuerttemberg(a) 10,000,000 8.75 07/02/2008 10,000,000 Municipal Electric Authority Georgia, Gen C Rmkt, INS: GO of Participants, LOC: Bayerische Landesbank(a) 1,500,000 1.50 07/02/2008 1,500,000 Municipal Electric Authority of Georgia Revenue Bonds, PJ One SUB D RMKT, INS: FSA, SPA: Dexia Credit Local(a) 7,800,000 1.50 07/02/2008 7,800,000 Roswell Georgia Housing Authority Multifamily Revenue Bonds, Chambrel Roswell, INS: Fannie Mae, LIQ: Fannie Mae(a) 11,980,000 1.56 07/03/2008 11,980,000 ------------ 31,280,000 ------------ ILLINOIS - 6.4% Chicago Illinois Board of Education, GO Unlimited, Series D, INS: FSA, SPA: Dexia Credit Local(a) 2,000,000 1.50 07/03/2008 2,000,000 Chicago Illinois Board of Education, Series C, GO, INS: FSA, SPA: Dexia Public Finance(a) 1,950,000 1.53 07/03/2008 1,950,000 See Notes to Financial Statements 10 STATE STREET TAX FREE MONEY MARKET PORTFOLIO SCHEDULE OF INVESTMENTS - JUNE 30, 2008 (UNAUDITED) DATE PRINCIPAL RATE OF VALUE AMOUNT % MATURITY $ ------------ ---- ---------- ------------ ILLINOIS (CONTINUED) City of Chicago Illinois, Neighborhoods Alive 21, Class B, INS: MBIA, SPA: Depfa Bank PLC(a) 5,000,000 7.65 07/03/2008 5,000,000 Illinois Development Finance Authority Revenue Bonds, Chicago Educational TV Assignment, Series A, LOC: Lasalle Bank N.A.(a) 1,900,000 1.80 07/02/2008 1,900,000 Illinois Development Finance Authority Revenue Bonds, Chicago Symphony PJ, INS: GO of Corp, LOC: Bank One N.A.(a) 8,500,000 1.55 07/02/2008 8,500,000 Illinois Development Finance Authority Revenue Bonds, Evanston Northwestern, Class C, SPA: Bank One N.A.(a) 830,000 1.55 07/03/2008 830,000 Illinois Development Finance Authority Revenue Bonds, World Communications, Inc., LOC: Lasalle Bank N.A.(a) 1,500,000 1.55 07/02/2008 1,500,000 Illinois Finance Authority Revenue Bonds, Northwestern University, Series B(a) 9,800,000 1.42 07/02/2008 9,800,000 Lake County Illinois Community Consolidated School District No 50-Woodland, Series A, GO Unlimited, INS: FGIC(b) 1,760,000 6.00 12/01/2008 1,807,608 ------------ 33,287,608 ------------ INDIANA - 1.6% Delaware County Hospital Authority Revenue Bonds, Cardinal Health Systems Obligation, INS: AMBAC, LIQ: FAC-Bank One Indiana(a) 4,200,000 7.75 07/02/2008 4,200,000 Indiana State Development Finance Authority Revenue Bonds, Educational Facilities, Indiana Historical Society, LOC: Bank One Indiana N.A.(a) 4,200,000 1.55 07/02/2008 4,200,000 ------------ 8,400,000 ------------ LOUISIANA - 2.6% City of New Orleans Louisiana, ROCs RR II, Series R-12151, GO Unlimited, INS: AGC-ICC- FGIC, LIQ: Citibank N.A.(a) 11,880,000 1.57 07/03/2008 11,880,000 Louisiana State Offshore Terminal Authority Deep Water Port Revenue Bond, Series B, LOC: Bank One N.A.(a) 1,500,000 1.55 07/02/2008 1,500,000 ------------ 13,380,000 ------------ See Notes to Financial Statements 11 STATE STREET TAX FREE MONEY MARKET PORTFOLIO SCHEDULE OF INVESTMENTS - JUNE 30, 2008 (UNAUDITED) DATE PRINCIPAL RATE OF VALUE AMOUNT % MATURITY $ ------------ ---- ---------- ------------ MAINE - 1.2% State of Maine, GO Unlimited 6,000,000 4.00 05/15/2009 6,119,698 ------------ MARYLAND - 1.7% Maryland State Economic Development Corporation Revenue Bonds, Howard Hughes Medical Institution, Series B(a) 3,000,000 1.30 07/02/2008 3,000,000 Maryland State Health & Higher Educational Facilities Authority Revenue Bonds, University of Maryland Medical System, Class A, LOC: Wachovia Bank N.A.(a) 6,000,000 1.47 07/03/2008 6,000,000 ------------ 9,000,000 ------------ MASSACHUSETTS - 14.3% Austin Trust Various States Revenue Bonds, Series 2007-1040, INS: FSA, LIQ: Bank of America N.A.(a) 5,000,000 1.57 07/03/2008 5,000,000 Commonwealth of Massachusetts, GO Unlimited, Series C, INS: AMBAC, SPA: Bank of America N. A.(a) 7,900,000 1.90 07/03/2008 7,900,000 Massachusetts Bay Transportation Authority Revenue Bonds, Series A, INS: FGIC(b) 14,520,000 5.88 03/01/2009 15,063,950 Massachusetts State HEFA Revenue Bonds, Havard University, Series GG-1(a) 2,700,000 1.18 07/03/2008 2,700,000 Massachusetts State HEFA Revenue Bonds, Museum of Fine Arts, Series A1, SPA: Bank of America N.A.(a) 23,000,000 2.45 07/01/2008 23,000,000 Massachusetts State HEFA Revenue Bonds, Partner Healthcare System, Series D-3, INS: GO of Institution, SPA: JP Morgan Chase Bank(a) 18,545,000 1.46 07/03/2008 18,545,000 Massachusetts State Water Resources Authority Revenue Bonds, Series A, INS: FSA(b) 2,400,000 4.75 08/01/2008 2,429,137 ------------ 74,638,087 ------------ MICHIGAN - 1.8% Michigan State Building Authority Revenue Bonds, ROCs RR-II-R-717PB, INS: FSA, LIQ: PB Capital Corporation(a) 9,430,000 1.60 07/03/2008 9,430,000 ------------ MINNESOTA - 1.6% County of Washington Minnesota, Series A, GO Unlimited 1,080,000 5.00 02/01/2009 1,098,726 See Notes to Financial Statements 12 STATE STREET TAX FREE MONEY MARKET PORTFOLIO SCHEDULE OF INVESTMENTS - JUNE 30, 2008 (UNAUDITED) DATE PRINCIPAL RATE OF VALUE AMOUNT % MATURITY $ ------------ ---- ---------- ------------ MINNESOTA (CONTINUED) Southern Minnesota Municipal Power Agency Power Supply Systems Revenue Bonds, ROCs RR II, Series R-10021Z, INS: MBIA, LIQ: FAC- Citigroup Financial(a) 4,800,000 2.62 07/03/2008 4,800,000 State of Minnesota, GO 2,490,000 5.00 08/01/2008 2,493,263 ------------ 8,391,989 ------------ MISSOURI - 1.6% Kansas City Industrial Development Authority Revenue Bonds, Oak Street West Student, LOC: Bank of America(a) 8,550,000 1.54 07/02/2008 8,550,000 ------------ NEW JERSEY - 0.3% Essex County New Jersey Improvement Authority Revenue Bonds, Pooled Governmental Loan Program, LOC: First Union National Bank(a) 1,700,000 1.50 07/02/2008 1,700,000 ------------ NEW YORK - 1.7% City of New York New York, Subseries J2-RMKT, LOC: Westdeutsche Landesbank(a) 7,800,000 1.48 07/02/2008 7,800,000 New York State Local Government Assistance Corporation Revenue Bonds, Sub Lien, Series A-2, INS: GO of Corporation 1,250,000 5.00 04/01/2009 1,280,045 ------------ 9,080,045 ------------ NORTH CAROLINA - 1.0% Charlotte North Carolina COPs, Governmental Facilities, Series F, SPA: Bank of America N.A.(a) 2,000,000 1.55 07/03/2008 2,000,000 City of Winston-Salem North Carolina Water and Sewer Systems Revenue Bonds, Series C, SPA: Dexia Credit Local(a) 1,970,000 1.55 07/02/2008 1,970,000 Mecklenburg County North Carolina, GO Unlimited, Series C 950,000 5.00 02/01/2009 968,071 ------------ 4,938,071 ------------ OHIO - 4.0% Allen County Ohio Hospital Facilities Revenue Bonds, Catholic Healthcare Partners, Series C, LOC: Wachovia Bank N. A.(a) 2,680,000 1.70 07/01/2008 2,680,000 See Notes to Financial Statements 13 STATE STREET TAX FREE MONEY MARKET PORTFOLIO SCHEDULE OF INVESTMENTS - JUNE 30, 2008 (UNAUDITED) DATE PRINCIPAL RATE OF VALUE AMOUNT % MATURITY $ ------------ ---- ---------- ------------ OHIO (CONTINUED) Butler County Ohio Healthcare Facilities Revenue Bonds, IMPT-Lifesphere Project, LOC: U.S. Bank NA(a) 1,400,000 1.48 07/03/2008 1,400,000 Cleveland Cuyahoga County Ohio Port Authority Revenue Bonds, Euclid/93rd Garage Office, LOC: Fifth Third Bank(a) 995,000 1.51 07/02/2008 995,000 Cuyahoga County Ohio Revenue Bonds, Cleveland Clinic, Subseries B1, SPA: JP Morgan Chase Bank(a) 11,200,000 1.70 07/01/2008 11,200,000 Ohio State Higher Educational Facility Commission Revenue Bonds, University Hospitals Health System, Series C, LOC: Wells Fargo Bank N.A.(a) 1,000,000 1.43 07/02/2008 1,000,000 Ohio State University General Receipts, Series B(a) 3,500,000 1.37 07/02/2008 3,500,000 ------------ 20,775,000 ------------ OREGON - 0.3% Oregon State, Series 73 G, SPA: JP Morgan Chase Bank(a) 1,500,000 1.40 07/02/2008 1,500,000 ------------ PENNSYLVANIA - 5.3% Adams County Pennsylvania Industrial Development Authority Revenue Bonds, Wellspan Properties INC, INS: AMBAC, SPA: Dexia Credit Local(a)(c) 9,555,000 8.25 07/03/2008 9,555,000 City of Philadelphia Pennsylvania Gas Works Revenue Bonds, Series B, INS: FSA(b) 1,000,000 5.00 07/01/2008 1,011,193 City of Philadelphia Pennsylvania Gas Works Revenue Bonds, Sixth Series, INS: FSA(a) 2,000,000 1.50 07/03/2008 2,000,000 Erie Pennsylvania Water Authority Revenue Bonds, Series A, INS: FSA, SPA: JP Morgan Chase Bank(a) 1,000,000 1.50 07/03/2008 1,000,000 Geisinger Authority Pennsylvania Health System Revenue Bonds, Series C, SPA: PNC Bank N.A.(a) 8,500,000 1.65 07/01/2008 8,500,000 Pennsylvania State Turnpike Commission Turnpike Revenue Bonds, Series A-2, SPA: Landesbank Baden-Wuerttemberg(a) 1,400,000 1.55 07/02/2008 1,400,000 Washington County Pennsylvania Authority Revenue Bonds, University of Pennsylvania(a) 4,000,000 1.35 07/03/2008 4,000,000 ------------ 27,466,193 ------------ See Notes to Financial Statements 14 STATE STREET TAX FREE MONEY MARKET PORTFOLIO SCHEDULE OF INVESTMENTS - JUNE 30, 2008 (UNAUDITED) DATE PRINCIPAL RATE OF VALUE AMOUNT % MATURITY $ ------------ ---- ---------- ------------ PUERTO RICO - 0.6% Puerto Rico Highway & Transportation Authority Revenue Bonds, Series H, INS: AMBAC, SPA: Bank of America N. A.(a) 3,000,000 4.00 07/03/2008 3,000,000 ------------ SOUTH CAROLINA - 3.3% Greenville County South Carolina School District Installment Revenue Bonds, Stars 2007-048, LIQ: BNP Paribas(a) 7,375,000 1.53 07/03/2008 7,375,000 South Carolina Transportation Infrastructure Bank Revenue Bonds, Series 1283, INS: AMBAC, LIQ: JP Morgan Chase Bank(a) 9,525,000 1.63 07/03/2008 9,525,000 ------------ 16,900,000 ------------ TENNESSEE - 1.0% Shelby County Tennessee Health Educational & Housing Facilities Board Hospital Revenue Bonds, PUTTERs, Series 254, LIQ: JP Morgan Chase Bank(a) 4,995,000 1.60 07/03/2008 4,995,000 ------------ TEXAS - 9.1% ABN AMRO Munitops Certificate Trust Revenue Bonds, Series 2006-6, INS: AMBAC, SPA: Bank of America N. A.(a)(c) 10,015,000 3.05 07/03/2008 10,015,000 Austin County Texas Industrial Development Corp Revenue Bonds, Justin Industries, Inc. Project, LOC: Bank One N.A.(a) 3,500,000 1.58 07/02/2008 3,500,000 City of Arlington Texas Special Obligations Revenue Bonds, Tax-Dallas Cowboys, Class B, INS: MBIA, SPA: Depfa Bank PLC(a) 1,400,000 7.75 07/03/2008 1,400,000 City of Garland Texas, GO Limited(b) 5,000,000 5.75 02/15/2009 5,140,441 Denton Texas Independent School District, School Building, Series B, INS: PSF-GTD, SPA: Bank of America N.A.(a) 1,000,000 1.55 07/03/2008 1,000,000 Harris County Texas, GO 2,215,000 5.00 10/01/2008 2,223,453 State of Texas, Public Finance Authority, Series B, GO 1,040,000 4.00 10/01/2008 1,042,035 Texas A&M University Revenue Bonds, Fing Systems(b) 4,000,000 5.38 05/15/2009 4,135,905 Texas State Transportation Commission Revenue Bonds, First Tier 13,000,000 5.00 04/01/2009 13,319,341 University of Texas Permanent University Fund Revenue Bonds, INS: PUFG(b) 1,000,000 5.25 07/01/2008 1,012,394 See Notes to Financial Statements 15 STATE STREET TAX FREE MONEY MARKET PORTFOLIO SCHEDULE OF INVESTMENTS - JUNE 30, 2008 (UNAUDITED) DATE PRINCIPAL RATE OF VALUE AMOUNT % MATURITY $ ------------ ---- ---------- ------------ TEXAS (CONTINUED) University of Texas, University Revenue Bonds, Financing Systems, Series A(a) 4,500,000 1.25 07/02/2008 4,500,000 ------------ 47,288,569 ------------ UTAH - 0.3% Murray City Utah Hospital Revenue Bonds, IHC Health Services, Inc., Series A, INS: J.P. Morgan Securities(a) 1,500,000 1.45 07/03/2008 1,500,000 ------------ VIRGINIA - 1.9% County of Chesterfield Virginia, Public Improvements, GO Unlimited 2,160,000 4.00 01/01/2009 2,184,566 Norfolk Virginia Economic Development Authority Revenue Bonds, Bon Secours Heath, Series A, INS: MBIA, SPA: Landesbank Baden- Wuerttemberg(a) 6,600,000 8.75 07/02/2008 6,600,000 Virginia College Building Authority Educational Facilities Revenue Bonds, 21st Century College and Equipment, Series B 1,000,000 5.00 02/01/2009 1,018,153 ------------ 9,802,719 ------------ WASHINGTON - 2.0% Port Vancouver Washington Revenue Bonds, United Grain Corporation, Series 84A, LOC: Bank of America N.A.(a) 2,000,000 1.55 07/02/2008 2,000,000 Seattle Washington Water Systems Revenue Bonds, Series A, LOC: Bayerische Landesbank(a) 400,000 1.53 07/02/2008 400,000 Washington State Higher Education Facilities Authority Revenue Bonds, Whitman College Project, SPA: JP Morgan Chase Bank(a) 8,000,000 1.55 07/03/2008 8,000,000 ------------ 10,400,000 ------------ WISCONSIN - 2.3% University Hospitals & Clinics Authority Revenue Bonds, Series B, INS: GO of Authority, LOC: U.S. Bank N.A.(a) 1,000,000 1.70 07/01/2008 1,000,000 Wisconsin State HEFA Revenue Bonds, Ascension Health, Series D 6,200,000 1.75 11/15/2008 6,200,000 See Notes to Financial Statements 16 STATE STREET TAX FREE MONEY MARKET PORTFOLIO SCHEDULE OF INVESTMENTS - JUNE 30, 2008 (UNAUDITED) PRINCIPAL DATE AMOUNT/ RATE OF VALUE SHARES % MATURITY $ ------------ ---- ---------- ------------ WISCONSIN (CONTINUED) Wisconsin State HEFA Revenue Bonds, Gundersen Lutheran, Series A, LOC: Wells Fargo Bank N.A.(a) 5,000,000 1.53 07/03/2008 5,000,000 ------------ 12,200,000 ------------ Total Short-Term Tax-Exempt Obligations 485,525,518 ------------ MONEY MARKET FUNDS - 6.6% Clark County Nevada Money Market Fund 4,000,000 4,000,000 Dreyfus Tax Exempt Cash Management Fund 30,237,280 30,237,280 ------------ Total Money Market Funds (at net asset value) 34,237,280 ------------ TOTAL INVESTMENTS(d) - 99.9% 519,762,798 OTHER ASSETS IN EXCESS OF LIABILITIES - 0.1% 624,277 ------------ NET ASSETS - 100.0% $520,387,075 ============ (a) Floating Rate Note- Interest rate shown is rate in effect at June 30, 2008 with next reset date. (b) Date shown is pre refunded date. (c) Security subject to restrictions on resale under federal securities laws, which may only be resold upon registration under the 1933 Act or in transactions exempt from registration, including sales to qualified institutional buyers pursuant to Rule 144A of the 1933 Act. The Portfolio does not have the right to demand that this security be registered. (d) Also represents the cost for federal tax purposes. ACRONYM NAME - ------- ---- AMBAC American Municipal Bond Assurance Corporation COPs Certificates of Participation EDA Economic Development Authority FGIC Financial Guaranty Insurance Company FSA Financial Security Assurance GO General Obligation GTD Guaranteed HEFA Health and Educational Facilities Authority INS Insured LOC Letter of Credit MBIA Municipal Bond Investors Assurance PSF Permanent School Fund PUTTERs Puttable Tax Exempt Receipts ROCs Reset Option Certificates SPA Standby Purchase Agreement See Notes to Financial Statements 17 STATE STREET U.S. GOVERNMENT MONEY MARKET PORTFOLIO PORTFOLIO STATISTICS (UNAUDITED) PORTFOLIO COMPOSITION* JUNE 30, 2008 - ----------------------- ------------- U.S. Government Securities 66.4% Repurchase Agreements 33.6 Liabilities less cash and other assets 0.0 ----- Total 100.0% ===== MATURITY LADDER JUNE 30, 2008 - --------------- ------------- 0-3 Days 33.6% 4-90 Days 66.4% 90+ Days 0.0 ----- Total 100.0% ===== Average maturity 31 Days * As a percentage of net assets as of the date indicated. The Portfolio's composition may vary over time. See Notes to Financial Statements 18 STATE STREET U.S. GOVERNMENT MONEY MARKET PORTFOLIO PORTFOLIO OF INVESTMENTS JUNE 30, 2008 (UNAUDITED) NAME OF ISSUER INTEREST MATURITY PRINCIPAL AMORTIZED AND TITLE OF ISSUE RATE DATE AMOUNT COST - ------------------ --------- ---------- ------------ ------------ U.S. GOVERNMENT AGENCY OBLIGATIONS -- 66.4% Fannie Mae Discount Notes(a) 2.055% 07/09/2008 $ 79,000,000 $ 78,963,923 Fannie Mae Discount Notes(a) 2.000% 07/30/2008 80,000,000 79,871,111 Fannie Mae Discount Notes(a) 2.030% 07/30/2008 20,005,000 19,972,286 Fannie Mae Discount Notes(a) 2.060% 08/01/2008 45,000,000 44,920,175 Fannie Mae Discount Notes(a) 2.070% 08/01/2008 25,000,000 24,955,438 Fannie Mae Discount Notes(a) 2.105% 08/08/2008 23,800,000 23,747,495 Fannie Mae Discount Notes(a) 2.350% 09/10/2008 70,483,000 70,156,331 Federal Home Loan Bank(b) 2.664% 09/17/2008 50,000,000 50,011,660 Federal Home Loan Bank(b) 2.575% 08/07/2008 65,000,000 65,000,000 Federal Home Loan Bank Discount Notes(a) 2.000% 08/01/2008 50,000,000 49,913,889 Federal Home Loan Bank Discount Notes(a) 2.220% 08/27/2008 19,220,000 19,152,442 Federal Home Loan Bank Discount Notes(a) 2.260% 08/29/2008 44,000,000 43,837,029 Federal Home Loan Bank Discount Notes(a) 2.330% 08/29/2008 33,000,000 32,873,986 Federal Home Loan Bank Discount Notes(a) 2.090% 09/03/2008 42,201,000 42,044,200 Freddie Mac(b) 2.639% 09/26/2008 70,000,000 70,057,222 Freddie Mac Discount Notes(a) 2.060% 07/14/2008 40,000,000 39,970,244 Freddie Mac Discount Notes(a) 2.070% 07/14/2008 61,000,000 60,954,402 Freddie Mac Discount Notes(a) 2.060% 08/08/2008 31,000,000 30,932,592 Freddie Mac Discount Notes(a) 2.130% 08/18/2008 92,500,000 92,237,300 Freddie Mac Discount Notes(a) 2.410% 09/15/2008 30,000,000 29,847,367 Freddie Mac Discount Notes(a) 2.470% 09/22/2008 16,700,000 16,604,898 ------------ TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS 986,023,990 ------------ REPURCHASE AGREEMENTS - 33.6% ABN AMRO Inc. Tri Party Repo, dated 06/30/08 (collateralized by a Federal National Mortgage Association, 3.150% due 05/06/10, a Federal Home Loan Bank, 5.250% due 05/21/09 and a Federal Home Loan Mortgage Corporation, 0.000% due 07/02/08 valued at $178,500,124); proceeds $175,012,639 2.600% 07/01/2008 175,000,000 175,000,000 Bank of America Tri Party Repo, dated 06/30/08 (collateralized by a Federal Home Loan Bank, 1.900% due 03/20/09 valued at $49,866,471); proceeds $48,888,123 2.300% 07/01/2008 48,885,000 48,885,000 Credit Suisse First Boston Tri Party Repo, dated 06/30/08 (collateralized by a Federal National Mortgage Association, 0.000% due 05/01/09 and Strip Principals, 0.000% - 6.000% due 08/15/08 - 05/15/14 valued at $51,002,831); proceeds $50,003,472 2.500% 07/01/2008 50,000,000 50,000,000 Goldman Sacs Tri Party Repo, dated 06/30/08 (collateralized by a U.S. Treasury Note, 7.250% due 08/15/22 valued at $178,500,043); proceeds $175,011,667 2.400% 07/01/2008 175,000,000 175,000,000 UBS Warburg Tri Party Repo, dated 06/30/08 (collateralized by Resolution Funding Strips, 0.000% due 07/15/12 - 10/15/16 valued at $51,002,342); proceeds $50,003,681 2.650% 07/01/2008 50,000,000 50,000,000 ------------ See Notes to Financial Statements 19 STATE STREET U.S. GOVERNMENT MONEY MARKET PORTFOLIO PORTFOLIO OF INVESTMENTS JUNE 30, 2008 (UNAUDITED) NAME OF ISSUER INTEREST MATURITY PRINCIPAL AMORTIZED AND TITLE OF ISSUE RATE DATE AMOUNT COST - ------------------ -------- -------- --------- -------------- TOTAL REPURCHASE AGREEMENTS 498,885,000 -------------- TOTAL INVESTMENTS(C) - 100.0% 1,484,908,990 OTHER ASSETS IN EXCESS OF LIABILITIES - 0.00% 175,386 -------------- NET ASSETS - 100.0% $1,485,084,376 ============== (a) Discount rate at time of purchase. (b) Variable Rate Security - Interest Rate is in effect as of June 30, 2008 with next reset date. (c) Also represents the cost for federal tax purposes. See Notes to Financial Statements 20 STATE STREET TREASURY MONEY MARKET PORTFOLIO PORTFOLIO STATISTICS (UNAUDITED) PORTFOLIO COMPOSITION* JUNE 30, 2008 - ---------------------- ------------- U.S. Treasury Obligations 100.0% Liabilities less cash and other assets 0.0 ----- Total 100.0% ===== MATURITY LADDER JUNE 30, 2008 - --------------- ------------- 0-3 Days 13.0% 4-90 Days 87.0% 90+ Days 0.0 ----- Total 100.0% ===== Average maturity 26 Days * As a percentage of net assets as of the date indicated. The Portfolio's composition may vary over time. 21 STATE STREET TREASURY PORTFOLIO PORTFOLIO OF INVESTMENTS JUNE 30, 2008 (UNAUDITED) INTEREST MATURITY PRINCIPAL AMORTIZED NAME OF ISSUER AND TITLE OF ISSUE RATE DATE AMOUNT COST - --------------------------------- -------- ---------- ----------- ------------ U.S. TREASURY OBLIGATIONS - 100.0% United States Treasury Bill 1.735% 07/03/2008 $25,103,000 $ 25,100,580 United States Treasury Bill 1.760% 07/03/2008 60,000,000 59,994,133 United States Treasury Bill 1.860% 07/03/2008 31,242,000 31,238,772 United States Treasury Bill 1.550% 07/10/2008 30,205,000 30,193,295 United States Treasury Bill 1.685% 07/10/2008 25,000,000 24,989,469 United States Treasury Bill 1.880% 07/10/2008 50,000,000 49,976,500 United States Treasury Bill 1.880% 07/10/2008 50,000,000 49,983,688 United States Treasury Bill 1.895% 07/10/2008 25,000,000 24,988,156 United States Treasury Bill 1.445% 07/17/2008 15,095,000 15,085,473 United States Treasury Bill 1.220% 07/17/2008 34,129,000 34,110,495 United States Treasury Bill 1.710% 07/17/2008 45,000,000 44,965,800 United States Treasury Bill 1.720% 07/17/2008 75,000,000 74,942,667 United States Treasury Bill 1.820% 07/17/2008 25,000,000 24,979,778 United States Treasury Bill 1.700% 07/24/2008 30,000,000 29,967,417 United States Treasury Bill 1.730% 07/24/2008 25,000,000 24,972,368 United States Treasury Bill 1.740% 07/24/2008 16,555,000 16,536,596 United States Treasury Bill 1.770% 07/24/2008 30,000,000 29,966,075 United States Treasury Bill 1.810% 07/24/2008 25,000,000 24,971,090 United States Treasury Bill 1.848% 08/07/2008 25,000,000 24,954,264 United States Treasury Bill 1.720% 08/07/2008 20,000,000 19,964,644 United States Treasury Bill 1.762% 08/14/2008 20,000,000 19,956,538 United States Treasury Bill 1.600% 08/21/2008 25,000,000 24,943,333 United States Treasury Bill 1.640% 08/28/2008 25,000,000 24,933,944 United States Treasury Bill 1.660% 09/04/2008 20,000,000 19,940,056 United States Treasury Bill 1.815% 09/04/2008 15,000,000 14,950,844 United States Treasury Bill 1.736% 09/18/2008 16,490,000 16,428,302 United States Treasury Bill 1.750% 09/18/2008 20,000,000 19,923,194 United States Treasury Bill 1.720% 09/25/2008 20,000,000 19,917,822 United States Treasury Bill- When Issued 1.840% 07/31/2008 25,000,000 24,962,865 United States Treasury Bill- When Issued 1.700% 07/31/2008 20,000,000 19,971,667 United States Treasury Bill- When Issued 1.805% 07/31/2008 25,000,000 24,962,396 ------------ TOTAL U.S. TREASURY OBLIGATIONS 892,772,221 ------------ TOTAL INVESTMENTS(a) - 100.0% 892,772,221 LIABILITIES IN EXCESS OF ASSETS - 0.00% (143,974) ------------ NET ASSETS - 100.0% $892,628,247 ============ (a) Also represents the cost for federal tax purposes. See Notes to Financial Statements 22 STATE STREET TREASURY PLUS MONEY MARKET PORTFOLIO PORTFOLIO STATISTICS (UNAUDITED) JUNE 30, PORTFOLIO COMPOSITION* 2008 - ---------------------- -------- U.S. Treasury Obligations 51.9% U.S. Government Securities 0.0 Repurchase Agreements 48.1 Liabilities less cash and other assets 0.0 ----- Total 100.0% ===== JUNE 30, MATURITY LADDER 2008 - --------------- -------- 0-3 Days 63.1% 4-90 Days 36.9% 90+ Days 0.0 ----- Total 100.0% ===== Average maturity 7 Days * As a percentage of net assets as of the date indicated. The Portfolio's composition may vary over time. 23 STATE STREET TREASURY PLUS PORTFOLIO PORTFOLIO OF INVESTMENTS JUNE 30, 2008 (UNAUDITED) INTEREST MATURITY PRINCIPAL AMORTIZED NAME OF ISSUER AND TITLE OF ISSUE RATE DATE AMOUNT COST - --------------------------------- -------- ---------- ------------ ------------ U.S. TREASURY OBLIGATIONS - 51.9% United States Treasury Bill 1.155% 07/03/2008 $ 75,000,000 $ 74,995,187 United States Treasury Bill 1.380% 07/10/2008 55,000,000 54,981,025 United States Treasury Bill 1.500% 07/10/2008 20,000,000 19,992,500 United States Treasury Bill 1.450% 07/17/2008 75,000,000 74,951,667 United States Treasury Bill 1.495% 07/24/2008 35,000,000 34,966,570 ------------ TOTAL U.S. TREASURY OBLIGATIONS 259,886,949 ------------ REPURCHASE AGREEMENTS - 48.1% Deutsche Tri Party Repo, dated 06/30/08 (collateralized by a U.S. Treasury Bill, 0.000% due 07/03/08 and a U.S. Treasury Strip, 0.000% due 02/15/16 valued at $102,000,001); proceeds $100,004,861 1.750% 07/01/2008 100,000,000 100,000,000 Fortis Tri Party Repo, dated 06/30/08 (collateralized by a U.S. Treasury Note, 8.000% due 11/15/20 valued at $15,300,074); proceeds $15,000,750 1.800% 07/01/2008 15,000,000 15,000,000 HSBC Tri Party Repo, dated 06/30/08 (collateralized by a Resolution Funding Strip, 0.000% due 01/15/13 valued at $15,300,285); proceeds $15,000,708 1.700% 07/01/2008 15,000,000 15,000,000 ING Tri Party Repo, dated 06/30/08 (collateralized by a U.S. Treasury Bond, 8.000% due 11/15/21 valued at $15,302,670); proceeds $15,000,771 1.850% 07/01/2008 15,000,000 15,000,000 Morgan Stanley Tri Party Repo, dated 06/30/08 (collateralized by U.S. Treasury Notes, 4.250% due 08/15/14 - 11/15/14 valued at $102,928,203); proceeds 95,969,585 1.720% 07/01/2008 95,965,000 95,965,000 ------------ TOTAL REPURCHASE AGREEMENTS 240,965,000 ------------ TOTAL INVESTMENTS(a) - 100.0% 500,851,949 LIABILITIES IN EXCESS OF ASSETS - 0.00% (80,221) ------------ NET ASSETS - 100.0% $500,771,728 ============ (a) Also represents the cost for federal tax purposes. See Notes to Financial Statements 24 STATE STREET MASTER FUNDS STATEMENTS OF ASSETS AND LIABILITIES JUNE 30, 2008 (UNAUDITED) U.S. TAX FREE GOVERNMENT TREASURY MONEY TREASURY PLUS MONEY MARKET MONEY MARKET MONEY MARKET MARKET MONEY MARKET PORTFOLIO PORTFOLIO PORTFOLIO PORTFOLIO PORTFOLIO -------------- ------------ -------------- -------------- ------------- ASSETS Investments in unaffiliated issuers, at amortized cost (Note 2) $6,865,215,904 $519,762,798 $ 986,023,990 $892,772,221 $259,886,949 Repurchase Agreements (cost $1,690,725,000, $0, $498,885,000, $0 and $240,965,000, respectively) (Note 2) 1,690,725,000 -- 498,885,000 -- 240,965,000 -------------- ------------ -------------- ------------ ------------ 8,555,940,904 519,762,798 1,484,908,990 892,772,221 500,851,949 Cash 288 -- 279 1,142 282 Receivables: Investments sold -- 277,762 -- -- -- Interest receivable 27,087,888 2,418,473 367,754 -- 11,675 Receivable from adviser (Note 3) 162,265 14,901 -- -- -- Miscellaneous assets 512,367 816 -- -- -- Prepaid expense 21,052 14,192 9,077 7,183 7,012 -------------- ------------ -------------- ------------ ------------ Total assets 8,583,724,764 522,488,942 1,485,286,100 892,780,546 500,870,918 -------------- ------------ -------------- ------------ ------------ LIABILITIES Payables: Investments purchased -- 2,027,020 -- -- -- Management fee (Note 3) 731,948 40,106 126,944 86,461 42,367 Administration, custody and transfer agent fees (Note 3) 150,737 7,941 27,410 17,881 9,041 Professional fees 24,331 24,609 34,083 34,600 34,447 Trustee's fees (Note 4) 95 -- -- -- -- Accrued expenses 12,765 2,191 13,287 13,357 13,335 -------------- ------------ -------------- ------------ ------------ Total liabilities 919,876 2,101,867 201,724 152,299 99,190 -------------- ------------ -------------- ------------ ------------ NET ASSETS $8,582,804,888 $520,387,075 $1,485,084,376 $892,628,247 $500,771,728 ============== ============ ============== ============ ============ See Notes to Financial Statements 25 STATE STREET MASTER FUNDS STATEMENTS OF OPERATIONS SIX MONTHS ENDED JUNE 30, 2008 (UNAUDITED) U.S. TAX FREE GOVERNMENT TREASURY MONEY TREASURY PLUS MONEY MARKET MONEY MARKET MONEY MARKET MARKET MONEY MARKET PORTFOLIO PORTFOLIO PORTFOLIO PORTFOLIO PORTFOLIO -------------- ------------ -------------- -------------- ------------- INVESTMENT INCOME Interest $ 136,803,834 $ 6,472,991 $ 21,534,149 $ 7,899,752 $ 6,096,588 -------------- ------------ -------------- ------------ ------------ EXPENSES Management fees (Note 3) 4,079,283 244,924 765,172 490,851 263,981 Administration, custody and transfer agent fees (Note 3) 831,046 49,572 157,296 100,134 54,137 Professional fees 31,042 28,141 35,695 35,755 35,602 Trustee's fees (Note 4) 29,091 7,018 6,607 5,309 5,041 Printing fees 78 807 1,510 1,515 1,498 Other expenses 21,868 2,769 13,062 12,093 11,975 -------------- ------------ -------------- ------------ ------------ Total Expenses 4,992,408 333,231 979,342 645,657 372,234 Less: Fee waivers/reimbursements by investment adviser (Note 3) (913,126) (88,307) -- -- -- -------------- ------------ -------------- ------------ ------------ Total Net Expenses 4,079,282 244,924 979,342 645,657 372,234 -------------- ------------ -------------- ------------ ------------ NET INVESTMENT INCOME $ 132,724,552 $ 6,228,067 $ 20,554,807 $ 7,254,095 $ 5,724,354 ============== ============ ============== ============ ============ REALIZED GAIN (LOSS) Net realized gain (loss) on investments 235,064 (98,854) -- 122,457 -- -------------- ------------ -------------- ------------ ------------ NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS $ 132,959,616 $ 6,129,213 $ 20,554,807 $ 7,376,552 $ 5,724,354 ============== ============ ============== ============ ============ See Notes to Financial Statements 26 STATE STREET MASTER FUNDS STATEMENTS OF CHANGES IN NET ASSETS TAX FREE U.S. GOVERNMENT MONEY MARKET MONEY MARKET MONEY MARKET PORTFOLIO PORTFOLIO PORTFOLIO --------------------------------- ---------------------------- ------------------------------- SIX MONTHS SIX MONTHS SIX MONTHS ENDED YEAR ENDED ENDED PERIOD ENDED ENDED PERIOD ENDED JUNE 30, 2008 DECEMBER 31, JUNE 30, 2008 DECEMBER 31, JUNE 30, 2008 DECEMBER 31, (UNAUDITED) 2007 (UNAUDITED) 2007* (UNAUDITED) 2007* --------------- ---------------- ------------- ------------- --------------- -------------- INCREASE (DECREASE) IN NET ASSETS FROM: OPERATIONS Net investment income $ 132,724,552 $ 294,455,764 $ 6,228,067 $ 4,534,841 $ 20,554,807 $ 10,808,121 Net realized gain (loss) on investments 235,064 (6,953) (98,854) 12,161 -- -- --------------- ---------------- ------------- ------------- --------------- -------------- Net increase in net assets from operations 132,959,616 294,448,811 6,129,213 4,547,002 20,554,807 10,808,121 --------------- ---------------- ------------- ------------- --------------- -------------- CAPITAL TRANSACTIONS Proceeds from contributions 11,362,497,990 14,082,546,440 951,398,348 743,338,878 2,148,915,493 1,801,532,181 Fair value of withdrawals (9,830,915,746) (13,655,849,339) (884,818,991) (300,207,375) (1,761,180,241) (735,545,985) --------------- ---------------- ------------- ------------- --------------- -------------- Net increase in net assets from capital transactions 1,531,582,244 426,697,101 66,579,357 443,131,503 387,735,252 1,065,986,196 --------------- ---------------- ------------- ------------- --------------- -------------- NET INCREASE IN NET ASSETS 1,664,541,860 721,145,912 72,708,570 447,678,505 408,290,059 1,076,794,317 NET ASSETS Beginning of period 6,918,263,028 6,197,117,116 447,678,505 -- 1,076,794,317 -- --------------- ---------------- ------------- ------------- --------------- -------------- End of period $ 8,582,804,888 $ 6,918,263,028 $ 520,387,075 $ 447,678,505 $ 1,485,084,376 $1,076,794,317 =============== ================ ============= ============= =============== ============== * The portfolios commenced operations on February 7, 2007 and October 17, 2007, respectively. See Notes to Financial Statements 27 STATE STREET MASTER FUNDS STATEMENTS OF CHANGES IN NET ASSETS TREASURY TREASURY PLUS MONEY MARKET MONEY MARKET PORTFOLIO PORTFOLIO -------------------------------- -------------------------------- SIX MONTHS ENDED PERIOD ENDED SIX MONTHS ENDED PERIOD ENDED JUNE 30, 2008 DECEMBER 31, JUNE 30, DECEMBER 31, (UNAUDITED) 2007* 2008 (UNAUDITED) 2007* ---------------- ------------- ---------------- ------------- INCREASE (DECREASE) IN NET ASSETS FROM: OPERATIONS Net investment income $ 7,254,095 $ 2,370,783 $ 5,724,354 $ 3,784,290 Net realized gain on investments 122,457 8,735 -- -- --------------- ------------- ------------- ------------- Net increase in net assets from operations 7,376,552 2,379,518 5,724,354 3,784,290 --------------- ------------- ------------- ------------- CAPITAL TRANSACTIONS Proceeds from contributions 4,300,698,974 652,230,533 679,708,358 934,443,802 Fair value of withdrawals (3,945,551,213) (124,506,117) (647,851,027) (475,038,049) --------------- ------------- ------------- ------------- Net increase in net assets from capital transactions 355,147,761 527,724,416 31,857,331 459,405,753 --------------- ------------- ------------- ------------- NET INCREASE IN NET ASSETS 362,524,313 530,103,934 37,581,685 463,190,043 NET ASSETS Beginning of period 530,103,934 -- 463,190,043 -- --------------- ------------- ------------- ------------- End of period $ 892,628,247 $ 530,103,934 $ 500,771,728 $ 463,190,043 =============== ============= ============= ============= * The portfolio commenced operations on October 25, 2007 and October 24, 2007, respectively. See Notes to Financial Statements 28 STATE STREET MASTER FUNDS FINANCIAL HIGHLIGHTS RATIOS TO AVERAGE NET ASSETS ---------------------------------- NET ASSETS GROSS NET NET END OF TOTAL OPERATING OPERATING INVESTMENT PERIOD PERIOD ENDED DECEMBER 31, RETURN (a) EXPENSES EXPENSES INCOME (000S OMITTED) - ------------------------- ---------- --------- --------- ---------- -------------- MONEY MARKET PORTFOLIO 2008* 1.66% 0.12%** 0.10%** 3.26%** $8,582,805 2007 5.30% 0.12% 0.10% 5.14% 6,918,263 2006 5.09% 0.13% 0.10% 5.08% 6,197,117 2005 3.31% 0.14% 0.10% 3.33% 1,639,871 2004 *** 0.68% 0.18%** 0.10%** 1.71%** 381,716 TAX FREE MONEY MARKET PORTFOLIO 2008* 1.24% 0.14%** 0.10%** 2.53%** 520,387 2007 *** 3.19% 0.17%** 0.10%** 3.42%** 447,679 U.S. GOVERNMENT MONEY MARKET PORTFOLIO 2008* 1.38% 0.13%** 0.13%** 2.69%** 1,485,084 2007 *** 0.92% 0.14%** 0.14%** 4.39%** 1,076,794 TREASURY PORTFOLIO 2008* 0.85% 0.13%** 0.13%** 1.48%** 892,628 2007 *** 0.61% 0.19%** 0.19%** 3.21%** 530,104 TREASURY PLUS PORTFOLIO 2008* 1.11% 0.14%** 0.14%** 2.16%** 500,772 2007 *** 0.75% 0.17%** 0.17%** 3.95%** 463,190 (a) Results represent past performance and are not indicative of future results. Total return for periods of less than one year are not annualized. * For the six months ended June 30, 2008 (unaudited). ** Annualized. *** The portfolios commenced operations on August 12, 2004, February 7, 2007, October 17, 2007, October 25, 2007 and October 24, 2007, respectively. See Notes to Financial Statements 29 STATE STREET MASTER FUNDS NOTES TO FINANCIAL STATEMENTS JUNE 30, 2008 (UNAUDITED) 1. ORGANIZATION The State Street Master Funds (the "Trust") is registered under the Investment Company Act of 1940, as amended (the "1940 Act"), as an open-end management investment company, and was organized as a business trust under the laws of The Commonwealth of Massachusetts on July 27, 1999. The Trust comprises eleven investment portfolios: the State Street Equity 500 Index Portfolio, the State Street Equity 400 Index Portfolio, the State Street Equity 2000 Index Portfolio, the State Street Aggregate Bond Index Portfolio, the State Street Money Market Portfolio, the State Street Tax Free Money Market Portfolio, the State Street Limited Duration Bond Portfolio, the State Street Short-Term Tax Exempt Bond Portfolio (formerly the State Street Tax Free Limited Duration Bond Portfolio), the State Street U.S. Government Money Market Portfolio, the State Street Treasury Money Market Portfolio and the State Street Treasury Plus Money Market Portfolio. At June 30, 2008, only the State Street Equity 500 Index Portfolio, the State Street Money Market Portfolio, the State Street Tax Free Money Market Portfolio, the State Street Short-Term Tax Exempt Bond Portfolio (formerly the State Street Tax Free Limited Duration Bond Portfolio), the State Street U.S. Government Money Market Portfolio, the State Street Treasury Money Market Portfolio and the State Street Treasury Plus Money Market Portfolio were in operation. Information presented in these financial statements pertains only to the State Street Money Market Portfolio, the State Street Tax Free Money Market Portfolio, the State Street U.S. Government Money Market Portfolio, the State Street Treasury Money Market Portfolio and the State Street Treasury Plus Money Market Portfolio (the "Portfolios"). The Portfolios commenced operations as follows: PORTFOLIO NAME COMMENCEMENT DATE - -------------- ----------------- State Street Money Market Portfolio August 12, 2004. State Street Tax Free Money Market Portfolio February 7, 2007 State Street U.S. Government Money Market Portfolio October 17, 2007 State Street Treasury Money Market Portfolio October 25, 2007 State Street Treasury Plus Money Market Portfolio October 24, 2007 The Portfolios are authorized to issue an unlimited number of non-transferable beneficial interests. 30 STATE STREET MASTER FUNDS NOTES TO FINANCIAL STATEMENTS (CONTINUED) JUNE 30, 2008 (UNAUDITED) The Portfolios' investment objectives are as follows: PORTFOLIO NAME INVESTMENT OBJECTIVE - -------------- -------------------- State Street Money Market To seek to maximize current income, to the Portfolio extent consistent with the preservation of capital and liquidity by investing in dollar denominated securities. State Street Tax Free Money To seek to maximize current income, exempt from Market Portfolio federal income taxes, to the extent consistent with the preservation of capital and liquidity. State Street U.S. Government To seek to maximize current income, to the Money Market Portfolio extent consistent with the preservation of capital and liquidity by investing in U.S. government securities with remaining maturities of one year or less an in repurchase agreements collateralized by U.S. government securities. State Street Treasury Money To seek a high level of current income Market Portfolio consistent with preserving principal and liquidity. State Street Treasury Plus To seek a high level of current income Money Market Portfolio consistent with preserving principal and liquidity by investing in a portfolio made up principally of U.S. Treasury securities and repurchase agreements collateralized by such securities. 2. SIGNIFICANT ACCOUNTING POLICIES The following is a summary of the significant accounting policies consistently followed by the Portfolios in the preparation of their financial statements. SECURITY VALUATION: As permitted under Rule 2a-7 of the 1940 Act and certain conditions therein, securities of the Portfolios are valued initially at cost and thereafter assume a constant amortization to maturity of any discount or premium. The Portfolios adopted Financial Accounting Standards Board Statement of Financial Accounting Standards No. 157, Fair Value Measurements ("FAS 157"), effective for financial statements issued for fiscal years beginning after November 15, 2007 and interim periods within those fiscal years. In accordance with FAS 157, fair value is defined as the price that the portfolio would receive upon selling an investment in a timely transaction to an independent buyer in the principal or most advantageous market of the investment. Various inputs are used in determining the value of the Fund's investments. FAS 157 established a three tier hierarchy of inputs to establish a classification of fair value measurements and disclosure. The three tier hierarchy of inputs is summarized below: - Level 1 -- quoted prices in active markets for identical securities - Level 2 -- other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.) - Level 3 -- significant unobservable inputs (including the Fund's own assumptions in determining the fair value of investments) 31 STATE STREET MASTER FUNDS NOTES TO FINANCIAL STATEMENTS (CONTINUED) JUNE 30, 2008 (UNAUDITED) The inputs or methodology used for valuing securities are not an indication of the risk associated with investing in those securities. The following is a summary of the inputs used, as of June 30, 2008, in valuing the Fund's assets carried at fair value: INVESTMENTS IN SECURITIES -------------------------------------------------------------------------------------------------- STATE STREET TAX STATE STREET U.S. STATE STREET STATE STREET STATE STREET MONEY FREE MONEY GOVERNMENT MONEY TREASURY MONEY TREASURY PLUS MONEY VALUATION INPUTS MARKET PORTFOLIO MARKET PORTFOLIO MARKET PORTFOLIO MARKET PORTFOLIO MARKET PORTFOLIO - ---------------- ------------------ ---------------- ----------------- ---------------- ------------------- Level 1 -- Quoted Prices $ -- $ -- $ -- $ -- $ -- Level 2 -- Other Significant Observable Inputs 8,555,940,904 519,762,798 1,484,908,990 892,772,221 500,851,949 Level 3 -- Significant Unobservable Inputs -- -- -- -- -- -------------- ------------ -------------- ------------ ------------ Total $8,555,940,904 $519,762,798 $1,484,908,990 $892,772,221 $500,851,949 ============== ============ ============== ============ ============ SECURITIES TRANSACTIONS, INVESTMENT INCOME AND EXPENSES: Securities transactions are recorded on a trade date basis for financial statement purposes. Interest income is recorded daily on the accrual basis and includes amortization of premium and accretion of discount on investments. Realized gains and losses from securities transactions are recorded on the basis of identified cost. Expenses are accrued daily. All of the net investment income and realized gains and losses from the security transactions of the Portfolios are allocated pro rata among the partners in the Portfolios based on each partner's daily ownership percentage. FEDERAL INCOME TAXES: The Portfolios are not required to pay federal income taxes on their net investment income and net capital gains because it is treated as a partnership for federal income tax purposes. All interest, gains and losses of the Portfolios are deemed to have been "passed through" to the Portfolios' partners in proportion to their holdings in the Portfolio, regardless of whether such items have been distributed by the Portfolio. Each partner is responsible for tax liability based on its distributive share; therefore, no provision has been made for federal income taxes. The Portfolios adopted the provisions of Financial Accounting Standards Board Interpretation No. 48 (FIN 48), "Accounting for Uncertainty in Income Taxes", on June 29, 2007. As of and during the six months ended June 30, 2008, the Portfolios did not have a liability for any unrecognized tax expenses. The Portfolios recognize interest and penalties, if any, relate to tax liabilities as income tax expense in the Statement of Operations. As of June 30, 2008, tax years 2004 (or since inception, for Portfolios formed subsequent to 2004) through 2007 remain subject to examination by the portfolio's major tax jurisdictions, which include the United State of America and the Commonwealth of Massachusetts. At June 30, 2008, the cost of investments for federal income tax purposes was the same as the cost for financial reporting purposes. REPURCHASE AGREEMENTS: A repurchase agreement customarily obligates the seller at the time it sells securities to a Portfolio to repurchase the securities at a mutually agreed upon price and time which, in the case of the Portfolios' transactions, is within seven days. The total amount received by a Portfolio on repurchase is calculated to exceed the price paid by the Portfolio, reflecting an agreed-upon market rate of 32 STATE STREET MASTER FUNDS NOTES TO FINANCIAL STATEMENTS (CONTINUED) JUNE 30, 2008 (UNAUDITED) interest for the period of time to the settlement date, and is not necessarily related to the interest rate on the underlying securities. The underlying securities are ordinarily United States Government securities, but may consist of other securities in which a Portfolio is permitted to invest. Repurchase agreements are fully collateralized at all times. The use of repurchase agreements involves certain risks. For example, if the seller of securities under a repurchase agreement defaults on its obligation to repurchase the underlying securities (as a result of its bankruptcy or otherwise) the Portfolio will seek to dispose of such securities; this action could involve costs or delays. In addition, the proceeds of any such disposition may be less than the amount the Portfolio is owed under the repurchase agreement. A Portfolio may enter into repurchase agreements maturing within seven days with domestic dealers, banks and other financial institutions deemed to be creditworthy by SSgA Funds Management, Inc. ("SSgA FM" or the "Adviser"), a subsidiary of State Street Corporation and an affiliate of State Street Bank and Trust Company ("State Street"). EXPENSE ALLOCATION: Certain expenses are applicable to multiple Portfolios. Expenses directly attributable to a Portfolio are charged to that Portfolio. Expenses of the Trust that are not directly attributed to a Portfolio are allocated among the Portfolios, on the basis of relative net assets, except where a more appropriate allocation of expenses to each of the Portfolios can otherwise be made fairly. USE OF ESTIMATES: The Portfolios' financial statements are prepared in accordance with U.S. generally accepted accounting principles that require the use of management estimates. Actual results could differ from those estimates. 3. RELATED PARTY FEES The Portfolios have entered into investment advisory agreements with SSgA FM. The Adviser directs the investments of each Portfolio in accordance with its investment objective, policies, and limitations. In compensation for the Adviser's services as investment adviser, the Portfolios pay the Adviser an annual fee of 0.10% of the respective Portfolio's average daily net assets. The Adviser has contractually agreed to cap the total operating expenses of the State Street Money Market Portfolio and the State Street Tax Free Money Market Portfolio at 0.10% of the respective Portfolio's average daily net assets until April 30, 2009. For the six months ended June 30, 2008, SSgA FM reimbursed the Portfolios under this agreement as follows: State Street Money Market Portfolio $913,126 State Street Tax Free Money Market Portfolio $ 88,307 State Street is the administrator, custodian and transfer agent for the Portfolios. In compensation for State Street's services as administrator, custodian and transfer agent, beginning February 1, 2007 the Trust pays State Street an annual fee, which is accrued daily and payable monthly at the applicable fee rate described below, of the following annual percentages of the Trust's average aggregate daily net assets during the month as follows: Annual percentage of Asset Levels average aggregate daily net assets - ------------ ---------------------------------- First $400 Million 0.03% Thereafter 0.02 Minimum annual fee per portfolio: $150,000 33 STATE STREET MASTER FUNDS NOTES TO FINANCIAL STATEMENTS (CONTINUED) JUNE 30, 2008 (UNAUDITED) 4. TRUSTEES' FEES The Trust pays each trustee who is not an officer or employee of SSgA FM or State Street $2,500 for each meeting of the Board of Trustees and an additional $500 for each telephonic meeting attended. The Trust also pays each trustee an annual retainer of $30,000. Each trustee is reimbursed for out-of-pocket and travel expenses. 5. INDEMNIFICATIONS The Trust's organizational documents provide that its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust. In addition, both in some of its principal service contracts and in the normal course of its business, the Trust enters into contracts that provide indemnifications to other parties for certain types of losses or liabilities. The Trust's maximum exposure under these arrangements in unknown as this could involve future claims against the Trust. Management does not expect any significant claims. 34 STATE STREET MASTER FUNDS JUNE 30, 2008 (UNAUDITED) GENERAL INFORMATION PROXY VOTING POLICIES AND PROCEDURES AND RECORD The Trust has adopted proxy voting procedures relating to portfolio securities held by the Portfolio. A description of the policies and procedures is available (i) without charge, upon request, by calling (877) 521-4083 or (ii) on the website of the Securities Exchange Commission (the "SEC") at www.sec.gov. Information on how the Fund voted proxies relating to portfolio securities during the most recent 12-month period ending June 30 is available by August 31 (i) without charge, upon request, by calling (877) 521-4083 or (ii) on the SEC's website at www.sec.gov. QUARTERLY PORTFOLIO SCHEDULE The Trust files its complete schedule of portfolio holdings with the SEC for the first and third quarters of its fiscal year (as of March and September of each year) on Form N-Q. The Trust's Forms N-Q are available on the SEC's website at www.sec.gov. The Trust's Forms N-Q may be reviewed and copied at the SEC's Public Reference Room in Washington, D.C. and information on the operation of the Public Reference Room may be obtained by calling 1-800-SEC-0330. The most recent Form N-Q is available without charge, upon request, by calling (877) 521-4083. 35 TRUSTEES Michael F. Holland William L. Boyan Rina K. Spence Douglas T. Williams James E. Ross INVESTMENT ADVISER SSgA Funds Management, Inc. State Street Financial Center One Lincoln Street Boston, MA 02111 ADMINISTRATOR, CUSTODIAN AND TRANSFER AGENT State Street Bank and Trust Company State Street Financial Center One Lincoln Street Boston, MA 02111 INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM Ernst & Young LLP 200 Clarendon Street Boston, MA 02116 LEGAL COUNSEL Ropes & Gray LLP One International Place Boston, MA 02110 This report is for shareholder information. This is not a prospectus intended for use in the purchase or sale of shares of beneficial interest. State Street Master Funds State Street Bank and Trust Company P.O. Box 5049 Boston, MA 02206 36 STATE STREET SHORT-TERM TAX EXEMPT BOND PORTFOLIO (FORMERLY STATE STREET TAX FREE LIMITED DURATION BOND PORTFOLIO) SEMI-ANNUAL REPORT JUNE 30, 2008 (UNAUDITED) STATE STREET SHORT-TERM TAX EXEMPT BOND PORTFOLIO EXPENSE EXAMPLE As a shareholder of the State Street Short-Term Tax Exempt Bond Portfolio (the "Portfolio"), you incur ongoing costs, which include costs for portfolio management and administrative services, among others. This example is intended to help you understand your ongoing costs (in dollars) of investing in the Portfolio and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 made at the beginning of the period shown and held for the entire period from January 1, 2008 to June 30, 2008. The table below illustrates your Portfolio's costs in two ways: - BASED ON ACTUAL FUND RETURN. This section helps you to estimate the actual expenses that you paid over the period. The "Ending Account Value" shown is derived from the Portfolio's actual return, and the third column shows the dollar amount that would have been paid by an investor who started with $1,000 in the Portfolio. You may use the information here, together with the amount you invested, to estimate the expenses that you paid over the period. To do so, simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number given for the Portfolio under the heading "Expenses Paid During Period". - BASED ON HYPOTHETICAL 5% RETURN. This section is intended to help you compare your Portfolio's costs with those of other mutual funds. It assumes that the Portfolio had a yearly return of 5% before expenses, but that the expense ratio is unchanged. In this case- because the return used is not the Portfolio's actual return- the results do not apply to your investment. The example is useful in making comparisons because the Securities and Exchange Commission requires all mutual funds to calculate expenses based on a 5% return. You can assess your Portfolio's costs by comparing this hypothetical example with the hypothetical examples that appear in shareholder reports of other funds. Six Months Ended June 30, 2008 BEGINNING ENDING EXPENSES PAID ACCOUNT VALUE ACCOUNT VALUE DURING JANUARY 1, 2008 JUNE 30, 2008 PERIOD * --------------- -------------- ------------- BASED ON ACTUAL PORTFOLIO RETURN $1,000.00 $1,018.90 $0.50 BASED ON HYPOTHETICAL (5% RETURN BEFORE EXPENSES) $1,000.00 $1,024.37 $0.50 * The calculations are based on expenses incurred in the most recent fiscal period of the Portfolio. The Portfolio's annualized average weighted expense ratio as of June 30, 2008 was 0.10%. The dollar amounts shown as "Expenses Paid" are equal to the annualized average weighted expense ratio multiplied by the average account value over the period, multiplied by the number of days in the most recent six-month period, then divided by the number of days in the most recent 12-month period. 1 STATE STREET SHORT-TERM TAX EXEMPT BOND PORTFOLIO PORTFOLIO STATISTICS (UNAUDITED) PORTFOLIO COMPOSITION* JUNE 30, 2008 - ---------------------- ------------- General Obligations 34.5% General Obligations State 20.8 Miscellaneous Revenue 14.3 Pre Refunded/Escrow to Maturity 12.1 Lease 5.5 Water & Sewer 3.8 Higher Education 3.1 Hospital Revenue 2.8 Water Revenue 1.9 TRANS Revenue 1.2 ----- Total 100.0% ===== MATURITY LADDER JUNE 30, 2008 - --------------- ------------- < 6 months 2.9% 6 months - 1 year 3.9% 1 year + 93.2% ----- Total 100.0% ===== * The Portfolio's composition will vary over time. 2 STATE STREET SHORT-TERM TAX EXEMPT BOND PORTFOLIO SCHEDULE OF INVESTMENTS - JUNE 30, 2008 (UNAUDITED) PRINCIPAL RATE DATE OF AMOUNT % MATURITY VALUE $ ---------- ---- ---------- ----------- TAX-EXEMPT OBLIGATIONS -- 80.9% ALABAMA -- 0.4% State of Alabama, Parks System Improvement Corp., Series C, GO Unlimited 350,000 5.25 06/01/2009 360,696 ----------- ARIZONA -- 8.2% Arizona School District, TAN, Financing Program COPs 900,000 4.50 07/30/2008 901,998 City of Casa Grande Arizona, GO Unlimited, INS: FSA 1,000,000 3.50 07/01/2010 1,014,260 Maricopa County Arizona School District No 11, Peoria, GO Unlimited, INS: FSA 2,250,000 3.00 07/01/2010 2,260,417 Maricopa County Arizona School District No 66, Roosevelt Elementary, Series A, GO Unlimited, INS: FSA 2,380,000 4.00 07/01/2010 2,436,882 ----------- 6,613,557 ----------- CALIFORNIA -- 3.2% California State Economic Recovery, Series A, GO Unlimited 1,000,000 5.00 01/01/2011 1,046,250 Golden Empire Schools Financing Authority California Lease Revenue Bonds, Kern High School District 1,500,000 4.00 05/01/2010 1,519,215 ----------- 2,565,465 ----------- COLORADO -- 1.4% Central Platte Valley Metropolitan District, Series A, GO Unlimited, LOC: BNP Paribas 1,110,000 5.00 12/01/2031 1,136,862 ----------- DISTRICT OF COLUMBIA -- 2.2% Washington DC Convention Center Authority Dedicated Tax Revenue Bonds, Sr. Lien, INS: AMBAC 1,750,000 5.25 10/01/2011 1,781,570 ----------- GEORGIA -- 3.9% State of Georgia, Series B, GO Unlimited 3,000,000 5.00 07/01/2010 3,132,510 ----------- ILLINOIS -- 3.2% Chicago Illinois Park District, Personal Property Replacement, Series D, GO Unlimited 1,000,000 5.00 01/01/2011 1,043,800 State of Illinois, First Series, GO Unlimited, INS: FSA 1,075,000 5.25 05/01/2010 1,122,354 State of Illinois, First Series, GO Unlimited, INS: FSA 400,000 5.25 04/01/2009 410,056 ----------- 2,576,210 ----------- MARYLAND -- 4.6% Baltimore County Maryland, Constrution Public Improvement, GO Unlimited 1,170,000 5.25 09/01/2010 1,232,431 See Notes to Financial Statements 3 STATE STREET SHORT-TERM TAX EXEMPT BOND PORTFOLIO SCHEDULE OF INVESTMENTS - JUNE 30, 2008 (UNAUDITED) (CONTINUED) PRINCIPAL RATE DATE OF AMOUNT % MATURITY VALUE $ ---------- ---- ---------- ----------- MARYLAND -- (CONTINUED) Washington Suburban Sanitation District Maryland, Sewage Disposal, GO Unlimited 2,400,000 5.00 06/01/2010 2,503,920 ----------- 3,736,351 ----------- MASSACHUSETTS -- 3.0% Commonwealth of Massachusetts, Series E, GO Limited 1,230,000 5.50 01/01/2010 1,281,032 Massachusetts State HEFA Revenue Bonds, New England Medical Center Hospital, Series H, INS: FGIC 1,160,000 5.00 05/15/2009 1,185,381 ----------- 2,466,413 ----------- MICHIGAN -- 1.6% Grand Rapids Michigan Community College, GO Limited, INS: FSA 1,225,000 5.00 05/01/2009 1,257,034 ----------- NEVADA -- 5.6% Clark County Nevada, Bond Bank, GO Limited, INS: FGIC 2,000,000 5.00 06/01/2031 2,102,660 State of Nevada, Capital Improvement and Cultural Affairs, Series A, GO Limited 1,180,000 5.50 03/01/2017 1,233,666 Truckee Meadows Nevada Water Authority Revenue Bonds, Series A, INS: FSA 1,180,000 5.50 07/01/2009 1,222,008 ----------- 4,558,334 ----------- NEW JERSEY -- 1.1% New Jersey EDA Revenue Bonds, School Facilities Construction, Series Y 850,000 5.00 09/01/2010 882,750 ----------- NEW MEXICO -- 1.9% State of New Mexico Severance Tax Revenue Bonds, Series A-2 1,500,000 3.00 07/01/2010 1,506,645 ----------- NEW YORK -- 4.8% City of New York New York, Series F, GO Unlimited 1,000,000 5.00 08/01/2010 1,040,790 New York City Transitional Finance Authority Aid Revenue Bonds, Series S-2, INS: State Aid Withholding 1,500,000 5.00 01/15/2011 1,567,785 New York State Thruway Authority Service Contract Revenue Bonds, Bridge Service Contract 750,000 3.00 04/01/2010 752,265 New York State Urban Development Corporation Revenue Bonds, State Personal Income Tax, Series Al 500,000 5.00 12/15/2009 519,140 ----------- 3,879,980 ----------- NORTH CAROLINA -- 4.9% See Notes to Financial Statements 4 STATE STREET SHORT-TERM TAX EXEMPT BOND PORTFOLIO SCHEDULE OF INVESTMENTS - JUNE 30, 2008 (UNAUDITED) (CONTINUED) PRINCIPAL RATE DATE OF AMOUNT % MATURITY VALUE $ ---------- ---- ---------- ----------- NORTH CAROLINA -- (CONTINUED) Mecklenburg County North Carolina, Public Improvement, Series A, GO Unlimited 2,305,000 4.50 04/01/2011 2,395,955 State of North Carolina, Public Improvement, Series B, GO Unlimited 1,500,000 4.00 04/01/2010 1,535,280 ----------- 3,931,235 ----------- OHIO -- 2.6% Ohio State Building Authority Revenue Bonds, State Facilities Administration Building, Series A, INS: FSA 1,020,000 5.25 10/01/2009 1,056,414 State of Ohio Revenue Bonds, Higher Education Facilities, Series II-A 1,000,000 5.00 12/01/2010 1,050,920 ----------- 2,107,334 ----------- OKLAHOMA -- 1.3% Oklahoma State Capital Improvement Authority State Facilities Revenue Bonds, Higher Education Projects, Series F, INS: AMBAC 1,000,000 3.75 07/01/2009 1,016,350 ----------- OREGON -- 1.9% Portland Oregon Community College District, GO Unlimited 1,545,000 3.00 07/01/2009 1,562,428 ----------- PENNSYLVANIA -- 4.0% Allegheny County Pennsylvania HDA Revenue Bonds, University of Pittsburgh Medical Center, Series B 1,000,000 5.00 06/15/2011 1,038,550 Lehigh County Pennsylvania General Purpose Hospital Revenue Bonds, Lehigh Valley Health Network, Series A, INS: FSA 800,000 4.00 07/01/2010 818,024 Pennsylvania State, GO Unlimited 1,325,000 5.25 02/01/2010 1,376,821 Washington County Pennsylvania Authority Revenue Bonds, University of Pennsylvania (a) 15,000 1.35 07/03/2008 15,000 ----------- 3,248,395 ----------- TENNESSEE -- 1.3% Metropolitan Government Nashville & Davidson County Tennessee, Series A, GO Unlimited 1,000,000 5.00 01/01/2010 1,033,760 ----------- TEXAS -- 6.9% City of Austin Texas, Public Property Financial Contractual, GO Limited 1,000,000 5.00 09/01/2010 1,045,360 State of Texas, Tax & Revenue Anticipation Notes, GO Limited Notes 1,500,000 4.50 08/28/2008 1,506,480 Texas A&M University Revenue Bonds, Fing System 1,000,000 3.70 05/15/2011 1,015,760 Texas State Public Finance Authority Revenue Bonds, INS: FGIC 1,955,000 4.00 02/01/2011 1,987,551 ----------- 5,555,151 ----------- See Notes to Financial Statements 5 STATE STREET SHORT-TERM TAX EXEMPT BOND PORTFOLIO SCHEDULE OF INVESTMENTS - JUNE 30, 2008 (UNAUDITED) (CONTINUED) PRINCIPAL AMOUNT/ RATE DATE OF SHARES % MATURITY VALUE $ ---------- ---- ---------- ----------- VIRGINIA -- 8.6% Chesterfield County Virginia, Public Improvement, GO Unlimited 2,255,000 4.00 01/01/2010 2,301,972 Commonwealth of Virginia, Series B, GO Unlimited 1,655,000 5.00 06/01/2011 1,746,571 Virginia College Building Authority Virginia Educational Facilities Revenue Bonds, 21st Century College, Series B 1,450,000 5.00 02/01/2010 1,502,969 Virginia State Public School Authority Revenue Bonds, Series VII 1,290,000 5.00 04/15/2011 1,355,880 ----------- 6,907,392 ----------- WASHINGTON -- 3.0% Tacoma Washington Electrical Systems Revenue Bonds, Series A, INS: FSA 1,500,000 5.75 01/01/2017 1,608,975 Whatcom County Washington School District No 506 Nooksack Valley, GO Unlimited, INS: School Building Guaranty 815,000 4.00 12/01/2009 832,743 ----------- 2,441,718 ----------- WISCONSIN -- 1.3% South Milwaukee Wisonsin Promisory Notes, GO Unlimited, INS: MBIA 1,000,000 4.38 06/01/2010 1,024,210 ----------- Total Tax-Exempt Obligations (Cost $65,606,787) 65,282,350 ----------- MONEY MARKET FUND -- 22.1% State Street Institutional Tax Free Money Market Fund (b) (at net asset value) 17,817,244 17,817,244 TOTAL INVESTMENTS(c) -- 103.0% (COST $83,424,031) 83,099,594 LIABILITIES IN EXCESS OF ASSETS -- (3.0)% (2,418,368) ----------- NET ASSETS -- 100.0% $80,681,226 =========== (a) Floating Rate Note- Interest rate shown is rate in effect at June 30, 2008 with next reset date. (b) Affiliated issuer. See table that follows for more information. (c) Cost of investments shown approximates cost for federal income tax purposes. ACRONYM NAME - ------- --------------------------------------------- AMBAC American Municipal Bond Assurance Corporation COPs Certificates of Participation EDA Economic Development Authority FGIC Financial Guaranty Insurance Company FSA Financial Security Assurance GO General Obligation HDA Hospital Development Authority HEFA Health and Educational Facilities Authority See Notes to Financial Statements 6 STATE STREET SHORT-TERM TAX EXEMPT BOND PORTFOLIO SCHEDULE OF INVESTMENTS - JUNE 30, 2008 (UNAUDITED) (CONTINUED) INS Insured MBIA Municipal Bond Investors Assurance TAN Tax Anticipation Note AFFILIATE TABLE Certain investments made by the Portfolio were made in mutual funds affiliated with State Street Bank and Trust Company and SSgA Fund Management, Inc. ("SSgA FM or "the Adviser"). The market value of this investment at June 30, 2008 is listed in the Portfolio of Investments. Shares sold Income Earned Shares purchased for the Number of for the Number of shares for the 6 months 6 months shares held Value at 6 months Security Description held at 12/31/2007 ended 6/30/08 ended 6/30/08 at 6/30/08 6/30/08 ended 6/30/08 - -------------------- ------------------ ---------------- ------------- ----------- ----------- ------------- State Street Institutional Tax Free Money Market Fund 2,410,373 60,034,045 44,627,174 17,817,244 $17,817,244 $47,047 See Notes to Financial Statements 7 STATE STREET SHORT-TERM TAX EXEMPT BOND PORTFOLIO STATEMENT OF ASSETS AND LIABILITIES JUNE 30, 2008 (UNAUDITED) ASSETS Investments in unaffiliated issuers at market (identified cost $65,606,787) $65,282,350 Investments in non-controlled affiliates at market (net asset value $17,817,244) (Note 4) 17,817,244 ----------- 83,099,594 Receivables: Interest receivable 752,029 Receivable from adviser (Note 4) 12,251 Prepaid expenses 5,151 ----------- Total assets 83,869,025 LIABILITIES Payables: Investment securities purchased 3,151,237 Due to custodian 937 Management fee (Note 4) 5,584 Administration, custody and transfer agent fees (Note 4) 1,141 Professional fees 26,780 Accrued expenses and other liabilities 2,120 ----------- Total Liabilities 3,187,799 ----------- NET ASSETS $80,681,226 =========== See Notes to Financial Statements. 8 STATE STREET SHORT-TERM TAX EXEMPT BOND PORTFOLIO STATEMENT OF OPERATIONS FOR THE SIX MONTHS ENDED JUNE 30, 2008 (UNAUDITED) INVESTMENT INCOME Interest income - unaffiliated issuers $ 576,105 Interest income - non-controlled affiliated issuer 47,047 --------- Total Investment Income 623,152 EXPENSES Professional fees 30,312 Management fees (Note 4) 22,502 Trustees' fees (Note 5) 5,784 Printing fees 850 Administration, custody and transfer agent fees (Note 4) 4,578 Other expenses 2,242 --------- Total Expenses 66,268 Less: Fee waivers/reimbursements by investment adviser (Note 4) (43,766) --------- Total Net Expenses 22,502 --------- NET INVESTMENT INCOME $ 600,650 REALIZED AND UNREALIZED GAIN (LOSS) Net change in net unrealized appreciation (depreciation) on investments (349,755) --------- NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS $ 250,895 ========= See Notes to Financial Statements. 9 STATE STREET SHORT-TERM TAX EXEMPT BOND PORTFOLIO STATEMENTS OF CHANGES IN NET ASSETS For the Six Months Ended For the June 30, 2008 Year Ended (Unaudited) December 31, 2007* ------------- ------------------ INCREASE IN NET ASSETS FROM: OPERATIONS Net investment income $ 600,650 $ 1,149,525 Change in net unrealized appreciation (depreciation) of investments (349,755) 25,318 ----------- ----------- Net increase in net assets resulting from operations 250,895 1,174,843 ----------- ----------- CAPITAL TRANSACTIONS Proceeds from contributions 40,011,942 39,422,181 Fair value of withdrawals (48,987) (129,648) ----------- ----------- Net increase in net assets from capital transactions 39,962,955 39,292,533 ----------- ----------- TOTAL NET INCREASE IN NET ASSETS 40,213,850 40,467,376 NET ASSETS Beginning of period 40,467,376 -- ----------- ----------- End of period $80,681,226 $40,467,376 =========== =========== * The Portfolio commenced operations on February 7, 2007. See Notes to Financial Statements. 10 STATE STREET SHORT-TERM TAX EXEMPT BOND PORTFOLIO FINANCIAL HIGHLIGHTS The following table includes selected supplemental data and ratios to average net assets: Six Months Ended Year 6/30/2008 Ended (Unaudited) 12/31/2007* ----------- ----------- SUPPLEMENTAL DATA AND RATIOS: Net assets, end of period (000s) $80,681 $40.467 Ratios to average net assets: Gross operating expenses 0.29%** 0.35%** Net operating expenses 0.10%** 0.10%** Net investment income 2.67%** 3.58%** Portfolio turnover rate 121.29%*** 31.18%*** Total return(a) 0.89% 3.33% - ---------- * The Portfolio commenced operations on February 7, 2007. ** Annualized. *** Not annualized (a) Results represent past performance and are not indicative of future results. Total return for periods of less than one year are not annualized. See Notes to Financial Statements. 11 STATE STREET SHORT-TERM TAX EXEMPT BOND PORTFOLIO NOTES TO FINANCIAL STATEMENTS JUNE 30, 2008 (UNAUDITED) 1. ORGANIZATION The State Street Master Funds (the "Trust") is registered under the Investment Company Act of 1940, as amended (the "1940 Act"), as an open-end management investment company, and was organized as a business trust under the laws of The Commonwealth of Massachusetts on July 27, 1999. The Trust comprises eleven investment portfolios: the State Street Equity 500 Index Portfolio, the State Street Equity 400 Index Portfolio, the State Street Equity 2000 Index Portfolio, the State Street Aggregate Bond Index Portfolio, the State Street Money Market Portfolio, the State Street Tax Free Money Market Portfolio, the State Street Short-Term Tax Exempt Bond Portfolio, the State Street Limited Duration Bond Portfolio, the State Street Treasury Money Market Portfolio, the State Street Treasury Plus Money Market Portfolio and the State Street U.S. Government Money Market Portfolio. Information presented in these financial statements pertains only to the State Street Short-Term Tax Exempt Bond Portfolio (the "Portfolio"). The Portfolio commenced operations on February 7, 2007. At June 30, 2008, only the Portfolio, the State Street Equity 500 Index Portfolio, the State Street Money Market Portfolio, the State Street Tax Free Money Market Portfolio, the State Street Treasury Money Market Portfolio, the State Street Treasury Plus Portfolio and the State Street U.S. Government Money Market Portfolio were in operation. The Portfolio is authorized to issue an unlimited number of non-transferable beneficial interests. At a meeting of the Board of Trustees of the State Street Master Funds held on February 21, 2008, the Board of Trustees of the State Street Master Funds approved the change in designation of the State Street Tax Free Limited Duration Bond Portfolio, a series of the State Street Master Funds into which the Fund invests substantially all of its assets. Therefore all references to the State Street Tax Free Limited Duration Bond Portfolio in the Semi-annual are hereby deleted and replaced with the designation: "State Street Short-Term Tax Exempt Bond Portfolio." 2. SIGNIFICANT ACCOUNTING POLICIES The following is a summary of the significant accounting policies consistently followed by the Portfolio in the preparation of its financial statements. SECURITY VALUATION: The Portfolio's investments are valued each business day by independent pricing services. Fixed-income securities are valued on the basis of the closing bid price. Investments in other mutual funds are valued at the net asset value per share. Money market instruments maturing within 60 days of the valuation date are valued at amortized cost, a method by which each money market instrument is initially valued at cost, and thereafter a constant accretion or amortization of any discount or premium is recorded until maturity of the security. The Portfolio may value securities for which market quotations are not readily available at "fair value," as determined in good faith pursuant to procedures established by the Board of Trustees. The Portfolio adopted Financial Accounting Standards Board Statement of Financial Accounting Standards No. 157, Fair Value Measurements ("FAS 157"), effective for financial statements issued for fiscal years beginning after November 15, 2007 and interim periods within those fiscal years. In accordance with FAS 157, fair value is defined as the price that the portfolio would receive upon selling an investment in a timely transaction to an independent buyer in the principal or most advantageous market of the investment. Various inputs are used in determining the value of the Fund's investments. FAS 157 established a three tier hierarchy of inputs to establish a classification of fair value measurements and disclosure. The three tier hierarchy of inputs is summarized below: - Level 1 - quoted prices in active markets for identical securities - Level 2 - other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.) - Level 3 - significant unobservable inputs (including the Fund's own assumptions in determining the fair value of investments) The inputs or methodology used for valuing securities are not an indication of the risk associated with investing in those securities. The following is a summary of the inputs used, as of June 30, 2008, in valuing the Fund's assets carried at fair value: 12 STATE STREET SHORT-TERM TAX EXEMPT BOND PORTFOLIO NOTES TO FINANCIAL STATEMENTS (CONTINUED) JUNE 30, 2008 (UNAUDITED) INVESTMENTS IN VALUATION INPUTS SECURITIES - ---------------- -------------- Level 1 - Quoted Prices -- Level 2 - Other Significant Observable Inputs $83,099,594 Level 3 - Significant Unobservable Inputs -- ----------- TOTAL $83,099,594 =========== SECURITIES TRANSACTIONS, INVESTMENT INCOME AND EXPENSES: Securities transactions are recorded on a trade date basis for financial statement purposes. Interest income is recorded daily on the accrual basis and includes amortization of premium and accretion of discount on investments. Realized gains and losses from securities transactions are recorded on the basis of identified cost. Expenses are accrued daily based on average daily net assets. All of the net investment income and realized and unrealized gains and losses from the security transactions of the Portfolio are allocated pro rata among the partners in the Portfolio based on each partner's daily ownership percentage. FEDERAL INCOME TAXES: The Portfolio is not required to pay federal income taxes on its net investment income and net capital gains because it is treated as a partnership for federal income tax purposes. All interest, dividends, gains and losses of the Portfolio are deemed to have been "passed through" to the Portfolio's partners in proportion to their holdings in the Portfolio, regardless of whether such items have been distributed by the Portfolio. Each partner is responsible for tax liability based on its distributive share; therefore, no provision has been made for federal income taxes. The Portfolio adopted the provisions of Financial Accounting Standards Board Interpretation No. 48 (FIN 48), "Accounting for Uncertainty in Income Taxes", on June 29, 2007. As of and during the six months ended June 30, 2008, the Portfolio did not have a liability for any unrecognized tax expenses. The Portfolio recognizes interest and penalties, if any, related to tax liabilities as income tax expense in the Statement of Operations. As of June 30, 2008, tax years 2004 through 2007 remain subject to examination by the portfolio's major tax jurisdictions, which include the United States of America and the Commonwealth of Massachusetts. USE OF ESTIMATES: The Portfolio's financial statements are prepared in accordance with U.S. generally accepted accounting principles which require the use of management estimates. Actual results could differ from those estimates. 3. SECURITIES TRANSACTIONS For the six months ended June 30, 2008, purchases and sales of investment securities, excluding short-term investments, futures contracts, and in-kind contributions and withdrawals, aggregated to $79,690,900 and $51,725,000, respectively. At June 30, 2008, the book cost of investments was $83,424,031 which approximates cost computed on a federal tax basis. The aggregate gross unrealized appreciation and gross unrealized depreciation was $52,432 and $376,869, respectively, resulting in net depreciation of $324,437 for all securities as computed on a federal income tax basis. 4. RELATED PARTY FEES The Portfolio has entered into an investment advisory agreement with SSgA FM. The Adviser directs the investments of the Portfolio in accordance with its investment objective, policies, and limitations. In compensation for the Adviser's services as investment adviser, the Portfolio pays the Adviser an annual fee of 0.10% of the Portfolio's average daily net assets. The Adviser has contractually agreed to cap the total operating expenses of the Portfolio at 0.10% of the Portfolio's average daily net assets until November 1, 2008. For the six months ended June 30, 2008, SSgA FM reimbursed the Portfolio $43,766 under this agreement. State Street is the administrator, custodian and transfer agent for the Portfolio. In compensation for State Street's services as administrator, custodian and transfer agent, the Trust pays State Street an annual fee, which is accrued daily at the applicable 13 STATE STREET SHORT-TERM TAX EXEMPT BOND PORTFOLIO NOTES TO FINANCIAL STATEMENTS (CONTINUED) JUNE 30, 2008 (UNAUDITED) fee rate described below and payable monthly, of the following annual percentages of the Trust's average aggregate daily net assets during the month as follows: Annual percentage of average Asset Levels aggregate daily net assets - ------------ ---------------------------- First $400 Million 0.03% Thereafter 0.02 Minimum annual fee per trust: $150,000 5. TRUSTEES' FEES The Trust pays each trustee who is not an officer or employee of SSgA FM or State Street $2,500 for each meeting of the Board of Trustees and an additional $500 for each telephonic meeting attended. The Trust also pays each trustee an annual retainer of $30,000. Each trustee is reimbursed for out-of-pocket and travel expenses. 6. INDEMNIFICATIONS The Trust's organizational documents provide that its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust. In addition, both in some of its principal service contracts and in the normal course of its business, the Trust enters into contracts that provide indemnifications to other parties for certain types of losses or liabilities. The Trust's maximum exposure under these arrangements is unknown as this could involve future claims against the Trust. Management does not expect any significant claims. 7. NEW ACCOUNTING PRONOUNCEMENTS In March 2008, the Financial Accounting Standards board ("FASB") issued Statement of Financial Accounting Standards No.161, "Disclosures about Derivative Instruments and Hedging Activities ("SFAS 161"). SFAS 161 is effective for fiscal years and interim periods beginning after November 15, 2008. SFAS 161 requires enhanced disclosures about Funds' derivative and hedging activities. Management is currently evaluating the impact the adoption of SFAS 161 will have on the Funds' financial statement disclosures. 14 STATE STREET SHORT-TERM TAX EXEMPT BOND PORTFOLIO JUNE 30, 2008 GENERAL INFORMATION (UNAUDITED) PROXY VOTING POLICIES AND PROCEDURES AND RECORD The Trust has adopted proxy voting procedures relating to portfolio securities held by the Fund. A description of the policies and procedures is available (i) without charge, upon request, by calling (877) 521-4083 or (ii) on the website of the Securities Exchange Commission (the "SEC") at www.sec.gov. Information on how the Fund voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is available by August 31 (i) without charge, upon request, by calling (877)521-4083 or (ii) on the SEC's website at www.sec.gov. QUARTERLY PORTFOLIO SCHEDULE The Trust files a complete schedule of portfolio holdings with the SEC for the first and third quarters of its fiscal year (as of March and September of each year) on Form N-Q. The Trust's Forms N-Q are available on the SEC's website at www.sec.gov. The Trust's Forms N-Q may be reviewed and copied at the SEC's Public Reference Room in Washington, D.C. and information on the operation of the Public Reference Room may be obtained by calling 1-800-SEC-0330. The most recent Form N-Q is available without charge, upon request, by calling (877) 521-4083. 15 TRUSTEES Michael F. Holland William L. Boyan Rina K. Spence Douglas T. Williams James E. Ross INVESTMENT ADVISER SSgA Funds Management, Inc. State Street Financial Center One Lincoln Street Boston, MA 02111 ADMINISTRATOR AND CUSTODIAN State Street Bank and Trust Company State Street Financial Center One Lincoln Street Boston, MA 02111 INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM Ernst & Young LLP 200 Clarendon Street Boston, MA 02116 LEGAL COUNSEL Ropes & Gray LLP One International Place Boston, MA 02110 This report is for shareholder information. This is not a prospectus intended for use in the purchase or sale of shares of beneficial interest. STATE STREET SHORT-TERM TAX EXEMPT BOND PORTFOLIO State Street Bank and Trust Company P.O. Box 5049 Boston, MA 02206 16 ITEM 2. CODE OF ETHICS. Not applicable to this filing. ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. Not applicable to this filing. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. Not applicable to this filing. ITEM 5. AUDIT COMMITTEES OF LISTED REGISTRANTS. Not applicable to the Registrant. ITEM 6. SCHEDULE OF INVESTMENTS. Schedules of Investments are included as part of the reports to shareholders filed under Item 1 of this Form N-CSR. ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES. Not applicable to the Registrant. ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES Not applicable to the Registrant. ITEM 9. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS. Not applicable to the Registrant. ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS. Not applicable to the Registrant. ITEM 11. CONTROLS AND PROCEDURES. (a) The Trust's principal executive officer and principal financial officer have concluded that the Trust's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the "1940 Act")) are effective, as of a date within 90 days of the filing date of the report that includes the disclosure required by this paragraph, based on their evaluation of these controls and procedures required by Rule 30a-3(b) under the 1940 Act and Rules 13a-15(b) or 15d-15(b) under the Securities Exchange Act of 1934. (b) There were no changes in the Trust's internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act) that occurred during the Trust's second fiscal quarter covered by this Form N-CSR filing that has materially affected, or is reasonably likely to materially affect, the Trust's internal control over financial reporting. ITEM 12. EXHIBITS. (a) Certifications of principal executive officer and principal financial officer of the Trust as required by Rule 30a-2(a) under the 1940 Act. (b) Certifications of principal executive officer and principal financial officer of the Trust as required by Rule 30a-2(b) under the 1940 Act. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. (REGISTRANT): State Street Master Funds By: /s/ James E. Ross --------------------------------- James E. Ross President Date: August 20, 2008 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/ James E. Ross --------------------------------- James E. Ross President By: /s/ Gary L. French --------------------------------- Gary L. French Treasurer Date: August 20, 2008