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 5049 Boston, Massachusetts 02206 (Address of principal executive offices)(Zip code) (Name and Address of Agent for Service) Copy to: Ryan Louvar, Vice President and Counsel Timothy W. Diggins, Esq. State Street Bank and Trust Company Ropes & Gray LLP 2 Avenue de Lafayette, 6th Floor One International Place Boston, Massachusetts 02111 Boston, Massachusetts 02110-2624 Registrant's telephone number, including area code: (617) 662-3909 Date of fiscal year end: December 31 Date of reporting period: June 30, 2006 STATE STREET EQUITY 500 INDEX PORTFOLIO SEMI-ANNUAL REPORT JUNE 30, 2006 (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, 2006 to June 30, 2006. 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, 2006 <Table> <Caption> - ------------------------------------------------------------------------------------------------ BEGINNING ENDING ACCOUNT VALUE ACCOUNT VALUE EXPENSES PAID JANUARY 1, 2006 JUNE 30, 2006 DURING PERIOD* - ------------------------------------------------------------------------------------------------ BASED ON ACTUAL PORTFOLIO RETURN $1,000.00 $1,026.90 $0.23 - ------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------ BASED ON HYPOTHETICAL (5% RETURN BEFORE EXPENSES) $1,000.00 $1,024.57 $0.23 - ------------------------------------------------------------------------------------------------ </Table> * 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, 2006 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. 17 STATE STREET EQUITY 500 INDEX PORTFOLIO PORTFOLIO STATISTICS (UNAUDITED) <Table> <Caption> PORTFOLIO COMPOSITION* JUNE 30, 2006 - ---------------------------------------------------------------------------- Common Stocks 98.2% - ---------------------------------------------------------------------------- Money Market Funds 0.9 - ---------------------------------------------------------------------------- U.S. Government Securities 0.2 - ---------------------------------------------------------------------------- Liabilities less cash and other assets 0.7 - ---------------------------------------------------------------------------- Total 100.0% - ---------------------------------------------------------------------------- </Table> <Table> <Caption> TOP FIVE SECTORS (EXCLUDING SHORT-TERM INVESTMENTS)* JUNE 30, 2006 - ---------------------------------------------------------------------------- Financials 21.0% - ---------------------------------------------------------------------------- Information Technology 14.4 - ---------------------------------------------------------------------------- Health Care 12.0 - ---------------------------------------------------------------------------- Industrials 11.5 - ---------------------------------------------------------------------------- Consumer Discretionary 10.3 - ---------------------------------------------------------------------------- Total 69.2% - ---------------------------------------------------------------------------- </Table> * As a percentage of net assets as of the date indicated. The Portfolio's composition will vary over time. 18 STATE STREET EQUITY 500 INDEX PORTFOLIO PORTFOLIO OF INVESTMENTS JUNE 30, 2006 (UNAUDITED) <Table> <Caption> MARKET VALUE SHARES (000) ---------- ------------ COMMON STOCKS -- 98.2% CONSUMER DISCRETIONARY -- 10.3% Amazon.Com, Inc.(a) 64,300 $ 2,487 Apollo Group, Inc.(a) 29,475 1,523 AutoNation, Inc.(a) 30,136 646 AutoZone, Inc.(a) 11,387 1,004 Bed Bath & Beyond, Inc.(a) 59,014 1,958 Best Buy Co., Inc. 84,281 4,622 Big Lots, Inc.(a) 24,438 417 Black & Decker Corp. 16,033 1,354 Brunswick Corp. 19,929 663 Carnival Corp. 90,619 3,782 CBS Corp. 161,898 4,379 Centex Corp. 25,776 1,297 Circuit City Stores, Inc. 31,439 856 Clear Channel Communications, Inc. 104,465 3,233 Coach, Inc.(a) 80,700 2,413 Comcast Corp.(a) 439,767 14,398 Cooper Tire & Rubber Co. 12,537 140 D.R. Horton, Inc. 56,700 1,351 Darden Restaurants, Inc. 27,410 1,080 Dillard's, Inc. Class A 13,653 435 Dollar General Corp. 64,115 896 Dow Jones & Co., Inc. 12,526 439 Eastman Kodak Co. 60,837 1,447 eBay, Inc.(a) 240,520 7,045 EW Scripps Co. 18,000 777 Family Dollar Stores, Inc. 33,068 808 Federated Department Stores, Inc. 115,880 4,241 Ford Motor Co. 388,655 2,693 Fortune Brands, Inc. 30,466 2,163 Gannett Co., Inc. 49,938 2,793 Gap, Inc. 113,930 1,982 General Motors Corp. 117,773 3,508 Genuine Parts Co. 35,493 1,479 Goodyear Tire & Rubber Co.(a) 37,942 421 H&R Block, Inc. 68,820 1,642 Harley-Davidson, Inc. 55,738 3,059 Harman International Industries, Inc. 13,900 1,187 Harrah's Entertainment, Inc. 38,433 2,736 Hasbro, Inc. 36,787 666 </Table> <Table> <Caption> MARKET VALUE SHARES (000) ---------- ------------ Hilton Hotels Corp. 68,543 $ 1,938 Home Depot, Inc. 430,257 15,399 International Game Technology 70,352 2,669 Interpublic Group of Cos., Inc.(a) 88,477 739 JC Penney & Co., Inc. 49,188 3,321 Johnson Controls, Inc. 40,396 3,321 Jones Apparel Group, Inc. 23,979 762 KB HOME 15,862 727 Kohl's Corp.(a) 70,710 4,180 Leggett & Platt, Inc. 38,254 956 Lennar Corp. Class A 28,700 1,273 Limited Brands 70,969 1,816 Liz Claiborne, Inc. 22,041 817 Lowe's Cos., Inc. 161,423 9,794 Marriot International, Inc. Class A 67,678 2,580 Mattel, Inc. 81,445 1,345 McDonald's Corp. 259,253 8,711 McGraw-Hill, Inc. 74,326 3,733 Meredith Corp. 8,947 443 New York Times Co. Class A 30,745 755 Newell Rubbermaid, Inc. 57,721 1,491 News Corp. Class A 492,200 9,440 NIKE, Inc. Class B 39,513 3,201 Nordstrom, Inc. 44,576 1,627 Office Depot, Inc.(a) 59,670 2,267 OfficeMax, Inc. 14,319 584 Omnicom Group, Inc. 35,617 3,173 Pulte Homes, Inc. 44,872 1,292 Radioshack Corp. 28,653 401 Sears Holdings Corp.(a) 20,152 3,120 Sherwin-Williams Co. 23,570 1,119 Snap-On, Inc. 12,548 507 Stanley Works 14,432 682 Staples, Inc. 152,125 3,700 Starbucks Corp.(a) 159,552 6,025 Starwood Hotels & Resorts Worldwide, Inc. Class B 45,212 2,728 Target Corp. 179,657 8,780 Tiffany & Co. 30,068 993 Time Warner, Inc. 891,447 15,422 TJX Cos., Inc. 94,713 2,165 Tribune Co. 54,955 1,782 </Table> 19 STATE STREET EQUITY 500 INDEX PORTFOLIO PORTFOLIO OF INVESTMENTS -- (CONTINUED) JUNE 30, 2006 (UNAUDITED) <Table> <Caption> MARKET VALUE SHARES (000) ---------- ------------ CONSUMER DISCRETIONARY -- (CONTINUED) Univision Communications, Inc. Class A(a) 46,818 $ 1,568 V.F. Corp. 18,488 1,256 Viacom, Inc.(a) 150,698 5,401 Walt Disney Co. 456,873 13,706 Wendy's International, Inc. 23,967 1,397 Whirlpool Corp. 16,262 1,344 Yum! Brands, Inc. 56,422 2,836 ------------ 251,306 ------------ CONSUMER STAPLES -- 9.4% Alberto Culver Co. Class B 16,058 782 Altria Group, Inc. 434,864 31,932 Anheuser-Busch Cos., Inc. 161,167 7,348 Archer-Daniels-Midland Co. 136,567 5,637 Avon Products, Inc. 94,448 2,928 Brown-Forman Corp. Class B 17,182 1,228 Campbell Soup Co. 38,183 1,417 Clorox Co. 31,310 1,909 Coca-Cola Co. 426,735 18,358 Coca-Cola Enterprises, Inc. 64,300 1,310 Colgate-Palmolive Co. 107,035 6,411 ConAgra Foods, Inc. 108,046 2,389 Constellation Brands, Inc. Class A(a) 40,600 1,015 Costco Wholesale Corp. 97,951 5,596 CVS Corp. 170,484 5,234 Dean Foods Co.(a) 28,400 1,056 Estee Lauder Cos, Inc. 25,400 982 General Mills, Inc. 74,364 3,842 H.J. Heinz Co. 70,320 2,899 Hershey Foods Corp. 37,308 2,055 Kellogg Co. 50,529 2,447 Kimberly-Clark Corp. 95,564 5,896 Kroger Co. 152,022 3,323 McCormick & Co., Inc. 27,400 919 Molson Coors Brewing Co., Class B 12,244 831 Pepsi Bottling Group, Inc. 28,353 911 PepsiCo, Inc. 344,110 20,660 Procter & Gamble Co. 683,457 38,000 Reynolds American, Inc. 17,840 2,057 Safeway, Inc. 93,693 2,436 </Table> <Table> <Caption> MARKET VALUE SHARES (000) ---------- ------------ Sara Lee Corp. 158,717 $ 2,543 SuperValu, Inc. 43,003 1,320 Sysco Corp. 129,281 3,951 Tyson Foods, Inc., Class A 53,800 799 UST Corp. 33,547 1,516 Wal-Mart Stores, Inc. 520,628 25,079 Walgreen Co. 210,210 9,426 Whole Foods Market, Inc. 29,000 1,875 Wrigley Wm., Jr. Co. 45,670 2,072 ------------ 230,389 ------------ ENERGY -- 9.9% Anadarko Petroleum Corp. 96,108 4,583 Apache Corp. 69,030 4,711 Baker Hughes, Inc. 70,880 5,802 BJ Services Co. 67,510 2,515 Chesapeake Energy Corp. 80,900 2,447 ChevronTexaco Corp. 461,588 28,646 ConocoPhillips 343,696 22,522 Devon Energy Corp. 91,422 5,523 El Paso Corp. 145,394 2,181 EOG Resources, Inc. 50,568 3,506 ExxonMobil Corp. 1,260,302 77,320 Halliburton Co. 107,386 7,969 Hess Corp. 50,106 2,648 Kerr-McGee Corp. 47,142 3,269 Kinder Morgan, Inc. 21,938 2,191 Marathon Oil Corp. 75,357 6,277 Murphy Oil Corp. 34,800 1,944 Nabors Industries, Ltd.(a) 64,330 2,174 National Oilwell Varco, Inc.(a) 36,300 2,299 Noble Corp. 28,523 2,123 Occidental Petroleum Corp. 89,123 9,140 Rowan Cos., Inc. 23,239 827 Schlumberger, Ltd. 245,614 15,992 Sunoco, Inc. 27,956 1,937 Transocean, Inc.(a) 67,495 5,421 Valero Energy Corp. 128,000 8,515 Weatherford International Ltd.(a) 72,800 3,612 Williams Cos., Inc. 123,737 2,891 XTO Energy, Inc. 75,800 3,356 ------------ 242,341 ------------ </Table> 20 STATE STREET EQUITY 500 INDEX PORTFOLIO PORTFOLIO OF INVESTMENTS -- (CONTINUED) JUNE 30, 2006 (UNAUDITED) <Table> <Caption> MARKET VALUE SHARES (000) ---------- ------------ ENERGY -- (CONTINUED) FINANCIALS -- 21.0% ACE, Ltd. 68,155 $ 3,448 AFLAC, Inc. 103,616 4,803 Allstate Corp. 132,107 7,230 Ambac Financial Group, Inc. 22,047 1,788 American Express Co. 256,773 13,665 American International Group, Inc. 540,983 31,945 Ameriprise Financial, Inc. 50,594 2,260 AmSouth Bancorp 72,519 1,918 AON Corp. 66,023 2,299 Apartment Investment & Management Co. Class A 20,500 891 Archstone-Smith Trust 44,300 2,254 Bank of America Corp. 950,428 45,716 Bank of New York Co., Inc. 161,179 5,190 BB&T Corp. 115,018 4,784 Bear Stearns Cos., Inc. 25,299 3,544 Boston Properties, Inc. 19,100 1,727 Capital One Financial Corp. 63,015 5,385 Charles Schwab Corp. 214,993 3,436 Chubb Corp. 86,778 4,330 Cincinnati Financial Corp. 36,505 1,716 CIT Group, Inc. 42,000 2,196 Citigroup, Inc. 1,035,371 49,946 Comerica, Inc. 33,832 1,759 Commerce Bancorp, Inc. 38,300 1,366 Compass Bancshares, Inc. 27,100 1,507 Countrywide Financial Corp. 127,286 4,847 E*Trade Financial Corp.(a) 89,400 2,040 Equity Office Properties Trust 75,941 2,773 Equity Residential 60,907 2,724 Fannie Mae 201,429 9,689 Federal Home Loan Mortgage Corp. 143,746 8,195 Federated Investors, Inc. Class B 18,100 570 Fifth Third Bancorp 116,000 4,286 First Horizon National Corp. 26,117 1,050 Franklin Resources, Inc. 31,744 2,756 Genworth Financial, Inc. 75,700 2,637 Golden West Financial Corp. 53,622 3,979 Goldman Sachs Group, Inc. 89,900 13,524 </Table> <Table> <Caption> MARKET VALUE SHARES (000) ---------- ------------ Hartford Financial Services Group, Inc. 63,088 $ 5,337 Huntington Bancshares, Inc. 50,554 1,192 J.P. Morgan Chase & Co. 723,619 30,392 Janus Capital Group, Inc. 44,919 804 KeyCorp 83,709 2,987 Kimco Realty Corp. 44,300 1,616 Legg Mason, Inc. 27,600 2,747 Lehman Brothers Holdings, Inc. 111,336 7,253 Lincoln National Corp. 59,492 3,358 Loews Corp. 84,942 3,011 M & T Bank Corp. 16,300 1,922 Marsh & McLennan Cos., Inc. 113,936 3,064 Marshall & Ilsley Corp. 47,192 2,159 MBIA, Inc. 27,758 1,625 Mellon Financial Corp. 86,323 2,972 Merrill Lynch & Co., Inc. 192,327 13,378 MetLife, Inc. 157,807 8,081 MGIC Investment Corp. 18,362 1,193 Moody's Corp. 51,030 2,779 Morgan Stanley 222,943 14,092 National City Corp. 112,691 4,078 North Fork Bancorp, Inc. 96,535 2,912 Northern Trust Corp. 38,840 2,148 Plum Creek Timber Co., Inc. 38,580 1,370 PNC Financial Services Group, Inc. 61,847 4,340 Principal Financial Group, Inc. 58,150 3,236 Progressive Corp. 162,588 4,180 ProLogis 51,200 2,669 Prudential Financial, Inc. 102,800 7,988 Public Storage, Inc. 17,200 1,305 Regions Financial Corp. 95,609 3,167 SAFECO Corp. 24,664 1,390 Simon Property Group, Inc. 38,363 3,182 SLM Corp. 85,342 4,516 Sovereign Bancorp, Inc. 77,805 1,580 St. Paul Travelers Cos., Inc. 145,225 6,474 State Street Corp.(b) 69,525 4,039 SunTrust Banks, Inc. 75,572 5,763 Synovus Financial Corp. 67,604 1,810 T. Rowe Price Group, Inc. 55,580 2,101 Torchmark Corp. 20,676 1,255 </Table> 21 STATE STREET EQUITY 500 INDEX PORTFOLIO PORTFOLIO OF INVESTMENTS -- (CONTINUED) JUNE 30, 2006 (UNAUDITED) <Table> <Caption> MARKET VALUE SHARES (000) ---------- ------------ FINANCIALS -- (CONTINUED) U.S. Bancorp 370,461 $ 11,440 UnumProvident Corp. 62,935 1,141 Vornado Realty Trust 24,700 2,409 Wachovia Corp. 334,886 18,111 Washington Mutual, Inc. 199,913 9,112 Wells Fargo Co. 349,811 23,466 XL Capital, Ltd. Class A 37,732 2,313 Zions Bancorp 22,219 1,732 ------------ 513,362 ------------ HEALTH CARE -- 12.0% Abbott Laboratories 317,667 13,853 Aetna, Inc. 118,528 4,733 Allergan, Inc. 31,991 3,431 AmerisourceBergen Corp. 43,432 1,821 Amgen, Inc.(a) 245,475 16,012 Applera Corp. -- Applied Biosystems Group 38,367 1,241 Barr Pharmaceuticals, Inc.(a) 22,400 1,068 Bausch & Lomb, Inc. 11,325 555 Baxter International, Inc. 136,126 5,004 Becton, Dickinson & Co. 51,829 3,168 Biogen Idec, Inc.(a) 71,673 3,321 Biomet, Inc. 51,841 1,622 Boston Scientific Corp.(a) 254,012 4,278 Bristol-Myers Squibb Co. 409,217 10,582 C.R. Bard, Inc. 21,594 1,582 Cardinal Health, Inc. 86,866 5,588 Caremark Rx, Inc. 91,908 4,583 CIGNA Corp. 24,989 2,462 Coventry Health Care, Inc.(a) 33,600 1,846 Eli Lilly & Co. 235,197 12,999 Express Scripts, Inc.(a) 30,600 2,195 Fisher Scientific International, Inc.(a) 25,900 1,892 Forest Laboratories, Inc.(a) 68,306 2,643 Genzyme Corp.(a) 54,105 3,303 Gilead Sciences, Inc.(a) 94,600 5,597 HCA, Inc. 85,459 3,688 Health Management Associates, Inc. Class A 50,398 993 Hospira, Inc.(a) 32,236 1,384 </Table> <Table> <Caption> MARKET VALUE SHARES (000) ---------- ------------ Humana, Inc.(a) 34,425 $ 1,849 IMS Health, Inc. 41,881 1,125 Johnson & Johnson 616,646 36,949 King Pharmaceuticals, Inc.(a) 49,932 849 Laboratory Corp. of America Holdings(a) 26,300 1,637 Manor Care, Inc. 16,651 781 McKesson Corp. 63,831 3,018 Medco Health Solutions, Inc.(a) 62,672 3,590 MedImmune, Inc.(a) 52,465 1,422 Medtronic, Inc. 251,202 11,786 Merck & Co., Inc. 454,303 16,550 Millipore Corp.(a) 10,728 676 Mylan Laboratories Inc. 43,200 864 Patterson Cos., Inc.(a) 29,500 1,030 Pfizer, Inc. 1,525,974 35,815 Quest Diagnostics Inc. 33,800 2,025 Schering-Plough Corp. 309,224 5,885 St. Jude Medical, Inc.(a) 74,794 2,425 Stryker Corp. 60,908 2,565 Tenet Healthcare Corp.(a) 99,009 691 Thermo Electron Corp.(a) 33,929 1,230 UnitedHealth Group, Inc. 280,368 12,555 Watson Pharmaceuticals, Inc.(a) 22,003 512 Wellpoint, Inc.(a) 132,678 9,655 Wyeth 280,131 12,441 Zimmer Holdings, Inc.(a) 51,620 2,928 ------------ 292,297 ------------ INDUSTRIALS -- 11.5% 3M Co. 156,884 12,672 Allied Waste Industries, Inc.(a) 50,667 576 American Power Conversion Corp. 36,667 715 American Standard Cos., Inc. 37,321 1,615 Avery Dennison Corp. 22,970 1,334 Boeing Co. 166,445 13,634 Burlington Northern Santa Fe Corp. 76,250 6,043 Caterpillar, Inc. 139,370 10,380 Cendant Corp. 207,622 3,382 Cintas Corp. 28,482 1,132 Cooper Industries, Ltd. 19,121 1,777 CSX Corp. 45,824 3,228 </Table> 22 STATE STREET EQUITY 500 INDEX PORTFOLIO PORTFOLIO OF INVESTMENTS -- (CONTINUED) JUNE 30, 2006 (UNAUDITED) <Table> <Caption> MARKET VALUE SHARES (000) ---------- ------------ INDUSTRIALS -- (CONTINUED) Cummins, Inc. 9,573 $ 1,170 Danaher Corp. 49,426 3,179 Deere & Co. 48,741 4,069 Dover Corp. 42,713 2,111 Eaton Corp. 30,978 2,336 Emerson Electric Co. 85,335 7,152 Equifax, Inc. 26,769 919 FedEx Corp. 63,446 7,414 Fluor Corp. 18,106 1,683 General Dynamics Corp. 83,912 5,493 General Electric Co. 2,165,923 71,389 Goodrich Co. 25,755 1,038 Honeywell International, Inc. 172,142 6,937 Illinois Tool Works, Inc. 86,828 4,124 Ingersoll-Rand Co. Class A 68,600 2,935 ITT Industries, Inc. 38,404 1,901 L-3 Communications Holdings, Inc. 25,200 1,901 Lockheed Martin Corp. 73,571 5,278 Masco Corp. 83,074 2,462 Monster Worldwide, Inc.(a) 26,192 1,117 Navistar International Corp.(a) 13,180 324 Norfolk Southern Corp. 86,861 4,623 Northrop Grumman Corp. 71,478 4,579 PACCAR, Inc. 34,570 2,848 Pall Corp. 26,774 750 Parker-Hannifin Corp. 25,223 1,957 Pitney Bowes, Inc. 45,939 1,897 R.R. Donnelley & Sons Co. 45,660 1,459 Raytheon Co. 93,114 4,150 Robert Half International, Inc. 36,214 1,521 Rockwell Automation, Inc. 37,120 2,673 Rockwell Collins, Inc. 35,419 1,979 Ryder Systems, Inc. 12,780 747 Southwest Airlines Co. 147,740 2,418 Textron, Inc. 26,975 2,487 Tyco International, Ltd. 423,848 11,656 Union Pacific Corp. 56,340 5,237 United Parcel Service, Inc. Class B 225,800 18,590 United Technologies Corp. 210,414 13,344 </Table> <Table> <Caption> MARKET VALUE SHARES (000) ---------- ------------ W.W. Grainger, Inc. 16,109 $ 1,212 Waste Management, Inc. 113,279 4,064 ------------ 279,611 ------------ INFORMATION TECHNOLOGY -- 14.4% ADC Telecommunications, Inc.(a) 25,018 422 Adobe Systems, Inc. 125,242 3,802 Advanced Micro Devices, Inc.(a) 100,184 2,447 Affiliated Computer Services, Inc.(a) 24,600 1,270 Agilent Technologies, Inc.(a) 89,297 2,818 Altera Corp.(a) 75,978 1,333 Analog Devices, Inc. 74,861 2,406 Andrew Corp.(a) 34,827 309 Apple Computer, Inc.(a) 176,992 10,110 Applied Materials, Inc. 325,061 5,292 Autodesk, Inc. 48,430 1,669 Automatic Data Processing, Inc. 120,238 5,453 Avaya, Inc.(a) 87,415 998 BMC Software, Inc.(a) 44,636 1,067 Broadcom Corp.(a) 95,769 2,878 CA, Inc. 95,129 1,955 CIENA Corp.(a) 126,088 607 Cisco Systems, Inc.(a) 1,271,159 24,826 Citrix Systems, Inc.(a) 38,153 1,531 Computer Sciences Corp.(a) 39,182 1,898 Compuware Corp.(a) 78,557 526 Comverse Technology, Inc.(a) 42,838 847 Convergys Corp.(a) 28,605 558 Corning, Inc.(a) 325,585 7,876 Dell, Inc.(a) 472,791 11,541 Electronic Arts, Inc.(a) 63,400 2,729 Electronic Data Systems Corp. 107,786 2,593 EMC Corp.(a) 491,541 5,392 First Data Corp. 159,204 7,171 Fiserv, Inc.(a) 36,347 1,649 Freescale Semiconductor, Inc.(a) 84,108 2,473 Gateway, Inc.(a) 65,065 124 Google, Inc.(a) 42,910 17,993 Hewlett-Packard Co. 580,819 18,400 Intel Corp. 1,211,203 22,952 International Business Machines Corp. 322,818 24,799 </Table> 23 STATE STREET EQUITY 500 INDEX PORTFOLIO PORTFOLIO OF INVESTMENTS -- (CONTINUED) JUNE 30, 2006 (UNAUDITED) <Table> <Caption> MARKET VALUE SHARES (000) ---------- ------------ INFORMATION TECHNOLOGY -- (CONTINUED) Intuit, Inc.(a) 35,351 $ 2,135 Jabil Circuit, Inc. 36,613 937 JDS Uniphase Corp.(a) 352,519 892 Juniper Networks, Inc.(a) 117,100 1,872 KLA-Tencor Corp. 41,864 1,740 Lexmark International Group, Inc. Class A(a) 21,702 1,212 Linear Technology Corp. 63,675 2,132 LSI Logic Corp.(a) 81,935 733 Lucent Technologies, Inc.(a) 931,672 2,255 Maxim Integrated Products, Inc. 67,156 2,156 Micron Technology, Inc.(a) 151,532 2,282 Microsoft Corp. 1,827,204 42,574 Molex, Inc. 29,510 991 Motorola, Inc. 513,998 10,357 National Semiconductor Corp. 70,318 1,677 NCR Corp.(a) 38,184 1,399 Network Appliance, Inc.(a) 78,067 2,756 Novell, Inc.(a) 68,842 456 Novellus Systems, Inc.(a) 27,369 676 NVIDIA Corp.(a) 73,902 1,573 Oracle Corp.(a) 810,519 11,744 Parametric Technology Corp. New(a) 23,296 296 Paychex, Inc. 69,527 2,710 PerkinElmer, Inc. 27,257 570 PMC-Sierra, Inc.(a) 43,224 406 QLogic Corp.(a) 34,290 591 QUALCOMM, Inc. 348,878 13,980 Sabre Holdings Corp. Class A 28,424 625 SanDisk Corp.(a) 40,800 2,080 Sanmina-SCI Corp.(a) 112,858 519 Solectron Corp.(a) 187,214 640 Sun Microsystems, Inc.(a) 732,888 3,042 Symantec Corp.(a) 214,834 3,339 Symbol Technologies, Inc. 52,185 563 Tektronix, Inc. 16,729 492 Tellabs, Inc.(a) 93,575 1,245 Teradyne, Inc.(a) 41,392 577 Texas Instruments, Inc. 324,203 9,820 Unisys Corp.(a) 72,779 457 VeriSign, Inc.(a) 51,300 1,189 </Table> <Table> <Caption> MARKET VALUE SHARES (000) ---------- ------------ Waters Corp.(a) 21,857 $ 970 Xerox Corp.(a) 190,442 2,649 Xilinx, Inc. 72,204 1,635 Yahoo!, Inc.(a) 262,080 8,649 ---------- 350,307 ---------- MATERIALS -- 3.1% Air Products & Chemicals, Inc. 46,489 2,972 Alcoa, Inc. 180,846 5,852 Allegheny Technologies, Inc. 18,029 1,248 Ashland, Inc. 14,980 999 Ball Corp. 21,670 803 Bemis Co., Inc. 21,628 662 Consol Energy, Inc. 38,300 1,789 Dow Chemical Co. 200,999 7,845 E.I. Du Pont de Nemours & Co. 191,639 7,972 Eastman Chemical Co. 16,862 911 Ecolab, Inc. 38,226 1,551 Freeport-McMoRan Copper & Gold, Inc. Class B 39,514 2,189 Hercules, Inc.(a) 24,698 377 International Flavors & Fragrances, Inc. 16,204 571 International Paper Co. 102,856 3,322 Louisiana-Pacific Corp. 21,959 481 MeadWestvaco Corp. 37,588 1,050 Monsanto Co. 56,246 4,735 Newmont Mining Corp. 94,042 4,978 Nucor Corp. 64,808 3,516 Pactiv Corp.(a) 29,764 737 Phelps Dodge Corp. 42,510 3,493 PPG Industries, Inc. 34,490 2,276 Praxair, Inc. 67,420 3,641 Rohm & Haas Co. 29,896 1,498 Sealed Air Corp. 17,036 887 Sigma-Aldrich Corp. 13,793 1,002 Temple-Inland, Inc. 22,928 983 United States Steel Corp. 22,802 1,599 Vulcan Materials Co. 20,996 1,638 Weyerhaeuser Co. 51,624 3,214 ---------- 74,791 ---------- </Table> 24 STATE STREET EQUITY 500 INDEX PORTFOLIO PORTFOLIO OF INVESTMENTS -- (CONTINUED) JUNE 30, 2006 (UNAUDITED) <Table> <Caption> MARKET VALUE SHARES (000) ---------- ------------ MATERIALS -- (CONTINUED) TELECOMMUNICATION SERVICES -- 3.3% ALLTEL Corp. 80,898 $ 5,164 AT&T, Inc. 809,553 22,578 BellSouth Corp. 376,528 13,630 CenturyTel, Inc. 23,808 884 Citizens Communications Co. 68,877 899 Embarq Corp.(a) 31,045 1,273 Qwest Communications International, Inc.(a) 325,122 2,630 Sprint Corp. (Fon Group) 620,000 12,394 Verizon Communications, Inc. 607,410 20,342 ---------- 79,794 ---------- UTILITIES -- 3.3% AES Corp.(a) 137,914 2,545 Allegheny Energy, Inc.(a) 33,899 1,257 Ameren Corp. 42,542 2,148 American Electric Power Co., Inc. 82,254 2,817 CenterPoint Energy, Inc. 63,893 799 CMS Energy Corp.(a) 46,605 603 Consolidated Edison, Inc. 51,122 2,272 Constellation Energy Group, Inc. 37,103 2,023 Dominion Resources, Inc. 72,587 5,429 DTE Energy Co. 36,946 1,505 Duke Energy Corp. 256,899 7,545 Dynegy Inc. Class A(a) 77,330 423 Edison International 67,762 2,643 Entergy Corp. 43,243 3,059 Exelon Corp. 139,078 7,904 FirstEnergy Corp. 68,812 3,730 FPL Group, Inc. 84,078 3,479 KeySpan Corp. 35,806 1,447 Nicor, Inc. 9,313 386 NiSource, Inc. 57,867 1,264 Peoples Energy Corp. 8,131 292 PG&E Corp. 72,023 2,829 Pinnacle West Capital Corp. 20,581 821 PPL Corp. 79,236 2,559 </Table> <Table> <Caption> MARKET VALUE SHARES (000) ---------- ------------ Progress Energy, Inc. 52,408 $ 2,247 Public Service Enterprise Group, Inc. 52,422 3,466 Sempra Energy 53,789 2,446 Southern Co. 154,958 4,966 TECO Energy, Inc. 43,276 647 TXU Corp. 96,496 5,770 Xcel Energy, Inc. 83,797 1,607 ---------- 80,928 ---------- TOTAL COMMON STOCKS (Cost $1,666,913,046) 2,395,126 ---------- <Caption> PAR AMOUNT (000) ---------- U.S. GOVERNMENT SECURITIES -- 0.2% United States Treasury Bill 4.70% due 09/07/06(c)(d) $ 4,299 4,261 ---------- TOTAL U.S. GOVERNMENT SECURITIES (Cost $4,260,834) 4,261 ---------- <Caption> SHARES (000) ---------- MONEY MARKET FUNDS -- 0.9% AIM Short Term Investment Prime Portfolio 21,566 $ 21,566 Federated Money Market Obligations Trust 513 513 ---------- TOTAL MONEY MARKET FUNDS (Cost $22,078,843) 22,079 ---------- TOTAL INVESTMENTS -- 99.3% (identified cost $1,693,252,723) 2,421,466 OTHER ASSETS IN EXCESS OF LIABILITIES -- 0.7% 16,265 ---------- NET ASSETS -- 100.0% $2,437,731 ========== </Table> 25 STATE STREET EQUITY 500 INDEX PORTFOLIO PORTFOLIO OF INVESTMENTS -- (CONTINUED) JUNE 30, 2006 (UNAUDITED) <Table> <Caption> NUMBER UNREALIZED OF APPRECIATION CONTRACTS (000) ---------- ------------ SCHEDULE OF FUTURES CONTRACTS S&P 500 Financial Futures Contracts (long) Expiration Date 09/2006 666 $ 1,041 ---------- Total unrealized appreciation on open futures contracts purchased $ 1,041 ========== </Table> - --------------- (a) Non-income producing security. (b) Affiliated issuer. (c) Security held as collateral in relation to initial margin requirements on futures contracts. (d) Rate represents annualized yield at date of purchase. AFFILIATE TABLE <Table> <Caption> NUMBER OF INCOME EARNED SHARES HELD SHARES PURCHASED SHARES SOLD FOR NUMBER OF FOR THE 6 REALIZED GAIN AT FOR THE 6 MONTHS THE 6 MONTHS SHARES HELD AT MONTHS ENDED ON SHARES SOLD SECURITY DESCRIPTION 12/31/2005 ENDED 6/30/06 ENDED 6/30/06 6/30/06 6/30/06 (000) (000) - -------------------- ----------- ---------------- --------------- --------------- -------------- -------------- State Street Corp. 70,325 1,200 2,000 69,525 $27 $42 </Table> See Notes to Financial Statements 26 STATE STREET EQUITY 500 INDEX PORTFOLIO STATEMENT OF ASSETS AND LIABILITIES JUNE 30, 2006 (UNAUDITED) (Amounts in thousands) <Table> ASSETS Investments in unaffiliated issuers at market (identified cost $1,690,939) $2,417,427 Investments in non-controlled affiliates at market (identified cost $2,314) (Note 4) 4,039 ---------- 2,421,466 Receivables: Investment securities sold 13,639 Dividends and interest 2,921 ---------- Total assets 2,438,026 LIABILITIES Payables: Daily variation margin on futures contracts 110 Management fees (Note 4) 185 ---------- Total liabilities 295 ---------- NET ASSETS $2,437,731 ========== </Table> See Notes to Financial Statements. 27 STATE STREET EQUITY 500 INDEX PORTFOLIO STATEMENT OF OPERATIONS FOR THE SIX MONTHS ENDED JUNE 30, 2006 (UNAUDITED) (Amounts in thousands) <Table> INVESTMENT INCOME Dividend income -- unaffiliated issuers $22,997 Dividend income -- non-controlled affiliated issuer 27 Interest 1,312 ------- Total Investment Income 24,336 ------- EXPENSES Management fees (Note 4) $ 557 ------- Total Expenses 557 ------- NET INVESTMENT INCOME 23,779 ------- REALIZED AND UNREALIZED GAIN (LOSS) Net realized gain (loss) on: Investments -- unaffiliated issuers (4,121) Investments -- non-controlled affiliated issuer 42 Futures contracts (1,439) ------- (5,518) Net change in net unrealized appreciation (depreciation) on: Investments 45,905 Futures contracts 1,807 ------- 47,712 ------- Net realized and unrealized gain 42,194 ------- NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS $65,973 ======= </Table> See Notes to Financial Statements. 28 STATE STREET EQUITY 500 INDEX PORTFOLIO STATEMENT OF CHANGES IN NET ASSETS (Amounts in thousands) <Table> <Caption> For the Six Months Ended For the June 30, 2006 Year Ended (Unaudited) December 31, 2005 ---------------- ------------------ INCREASE (DECREASE) IN NET ASSETS FROM: OPERATIONS Net Investment Income................................ $ 23,779 $ 45,936 Net realized loss on investments and futures contracts......................................... (5,518) (7,186) Net change in net unrealized appreciation (depreciation).................................... 47,712 63,727 ---------- ---------- Net increase in net assets resulting from operations...................................... 65,973 102,477 ---------- ---------- CAPITAL TRANSACTIONS Proceeds from contributions.......................... 117,084 278,352 Fair value of withdrawals............................ (198,435) (457,339) Withdrawals in-kind.................................. -- (237,848) ---------- ---------- Net decrease in net assets from capital transactions.................................... (81,351) (416,835) ---------- ---------- TOTAL NET DECREASE IN NET ASSETS....................... (15,378) (314,358) NET ASSETS Beginning of period.................................... 2,453,109 2,767,467 ---------- ---------- End of period.......................................... $2,437,731 $2,453,109 ========== ========== </Table> See Notes to Financial Statements. 29 STATE STREET EQUITY 500 INDEX PORTFOLIO FINANCIAL HIGHLIGHTS The following table includes selected supplemental data and ratios to average net assets: <Table> <Caption> For the Six Months Ended Year Year Year Year Year 6/30/06 Ended Ended Ended Ended Ended (Unaudited) 12/31/05 12/31/04 12/31/03 12/31/02 12/31/01 ----------- -------- -------- -------- -------- -------- SUPPLEMENTAL DATA AND RATIOS: Net assets, end of period (in thousands) $2,437,731 $2,453,109 $2,767,467 $2,714,672 $1,992,548 $2,692,298 Ratios to average net assets: Operating expenses 0.045%+ 0.045% 0.045% 0.045% 0.045% 0.045% Net investment income 1.92%+ 1.84% 1.97% 1.74% 1.57% 1.34% Portfolio turnover rate* 4%++ 8% 9% 12% 13% 14% Total return(a) 2.69%++ 4.87% 10.86% 28.62% (22.16)% (11.94)% </Table> - --------------- * 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. 30 STATE STREET EQUITY 500 INDEX PORTFOLIO NOTES TO FINANCIAL STATEMENTS JUNE 30, 2006 (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 six 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, 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, 2006, only the Portfolio and State Street 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. SECURITIES TRANSACTIONS, INVESTMENT INCOME AND EXPENSES: Securities transactions are recorded on a trade date basis. Dividend income is recorded on the ex-dividend date. Interest income is recorded daily 31 STATE STREET EQUITY 500 INDEX PORTFOLIO NOTES TO FINANCIAL STATEMENTS (CONTINUED) JUNE 30, 2006 (UNAUDITED) 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. 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 (the "SEC") 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. 3. SECURITIES TRANSACTIONS For the six months ended June 30, 2006, purchases and sales of investment securities, excluding short-term investments, futures contracts, and in-kind withdrawals, aggregated to $94,209,892 and $139,808,353, respectively. The aggregate value of in-kind withdrawals was $0. At June 30, 2006, the book cost of investments was $1,693,252,723 which approximates cost computed on a federal tax basis. The aggregate gross unrealized appreciation and gross unrealized depreciation was 32 STATE STREET EQUITY 500 INDEX PORTFOLIO NOTES TO FINANCIAL STATEMENTS (CONTINUED) JUNE 30, 2006 (UNAUDITED) $821,744,395 and $93,531,438, respectively, resulting in net appreciation of $728,212,957 for all securities as computed on a federal income tax basis. 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, 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), 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, 2006 is listed in the Portfolio of Investments. 5. INDEMNIFICATIONS Like many other companies, 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 33 STATE STREET EQUITY 500 INDEX PORTFOLIO GENERAL INFORMATION (UNAUDITED) JUNE 30, 2006 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. 34 TRUSTEES Michael F. Holland William L. Boyan Rina K. Spence Douglas T. Williams 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 ACCOUNTANTS Ernst & Young LLP 200 Clarendon Street Boston, MA 02116 LEGAL COUNSEL Ropes & Gray LLP One International Place Boston, MA 02109 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 35 STATE STREET MONEY MARKET PORTFOLIO SEMI-ANNUAL REPORT JUNE 30, 2006 (UNAUDITED) STATE STREET MONEY MARKET PORTFOLIO EXPENSE EXAMPLE As a shareholder of the State Street Money Market 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, 2006 to June 30, 2006. 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, 2006 BEGINNING ENDING EXPENSES ACCOUNT ACCOUNT PAID VALUE VALUE DURING 1/1/06 6/30/06 PERIOD * --------- --------- -------- BASED ON ACTUAL PORTFOLIO RETURN $1,000.00 $1,018.90 $0.50 BASED ON HYPOTHETICAL (5% RETURN BEFORE EXPENSES) $1,000.00 $1,024.30 $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, 2006 was 0.100%. 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. 13 STATE STREET MONEY MARKET PORTFOLIO PORTFOLIO STATISTICS (UNAUDITED) PORTFOLIO COMPOSITION* JUNE 30, 2006 - ---------------------- ------------- Repurchase Agreements 39.4% Yankee Certificate of Deposit 20.6 Commercial Paper 18.8 Bank Note 10.3 Certificate of Deposit 4.4 Euro Certificate of Deposit 2.4 Time Deposits 1.9 Medium Term Note 1.5 Promissory Note 0.5 Other assets less liabilities 0.2 ------ Total 100.00% ====== MATURITY LADDER* JUNE 30, 2006 - ---------------- ------------- 3 Days 41.4% 4-90 Days 27.6 90+ Days 31.0 ----- Total 100.0% ===== Average maturity 33 Days * As a percentage of net assets as of the date indicated. The Portfolio's composition will vary over time. 14 STATE STREET MONEY MARKET PORTFOLIO PORTFOLIO OF INVESTMENTS JUNE 30, 2006 (UNAUDITED) NAME OF ISSUER INTEREST MATURITY PRINCIPAL AMORTIZED AND TITLE OF ISSUE RATE DATE AMOUNT COST + - ------------------ -------- ---------- ------------ ------------ COMMERCIAL PAPER -- 18.77% ABCP CDO -- 3.93% Davis Square Funding IV 5.280% 07/27/2006 $124,350,000 $123,875,812 Klio III Funding Corp. 5.280% 07/20/2006 65,778,000 65,594,698 ------------ 189,470,510 ------------ ABCP CREDIT ARBITRAGE -- 1.52% Grampian Funding Ltd. 5.100% 10/31/2006 25,000,000 24,567,917 Grampian Funding Ltd. 5.380% 12/18/2006 50,000,000 48,729,722 ------------ 73,297,639 ------------ ABCP HYBRID -- 1.55% Giro Balanced Funding Corp. 5.240% 07/17/2006 75,000,000 74,825,333 ------------ ABCP RECEIVABLES AND SECURITIES -- 4.21% Amstel Funding Corp. 4.635% 07/27/2006 25,000,000 24,916,313 Bavaria TRR Corporation 5.300% 07/25/2006 75,000,000 74,735,000 Bavaria TRR Corporation 5.320% 07/28/2006 75,200,000 74,899,952 Sheffield Receivables Corp. 5.270% 08/03/2006 28,062,000 27,926,437 ------------ 202,477,702 ------------ BANK FOREIGN -- 5.19% Danske Corp. 4.565% 10/13/2006 70,000,000 69,076,856 Macquarie Bank Ltd. (a) 5.048% 07/18/2006 12,000,000 11,999,944 Nordea North America, Inc. 5.330% 09/22/2006 75,000,000 74,078,354 San Paolo IMI Financial Co. 5.295% 08/02/2006 45,000,000 44,788,200 Santander Finance 4.940% 07/18/2006 50,000,000 49,885,250 ------------ 249,828,604 ------------ FINANCE CAPTIVE CONSUMER -- 2.37% General Electric Capital Corp. 5.230% 08/08/2006 75,000,000 74,585,958 General Electric Capital Corp. 4.540% 10/13/2006 40,000,000 39,475,378 ------------ 114,061,336 ------------ TOTAL COMMERCIAL PAPER 903,961,124 ------------ CERTIFICATES OF DEPOSIT -- 4.36% BANK DOMESTIC -- 4.36% Bank of America NA (b) 5.315% 02/28/2007 50,000,000 50,000,000 Washington Mutual Bank (b) 5.303% 04/20/2007 10,000,000 10,000,000 Wells Fargo Bank NA 5.310% 07/31/2006 150,000,000 149,998,756 ------------ TOTAL CERTIFICATES OF DEPOSIT 209,998,756 ------------ YANKEE CERTIFICATES OF DEPOSIT -- 20.65% BANK FOREIGN -- 20.65% Banco Bilbao Vizcaya NY 5.135% 08/21/2006 30,000,000 29,996,896 Barclays Bk PLC 5.010% 11/27/2006 25,000,000 25,000,000 BNP Paribas NT Branch 5.340% 05/07/2007 75,000,000 75,000,000 Calyon NY (b) 5.320% 11/27/2006 125,000,000 125,000,000 Credit Suisse First Boston 5.320% 08/04/2006 100,000,000 100,000,000 Fortis Bank 4.730% 10/13/2006 70,000,000 70,000,000 HBOS Treasury Services NY 5.212% 06/19/2007 100,000,000 100,000,000 Landesbank Baden- Wurtt NY 5.455% 09/22/2006 100,000,000 100,000,000 See Notes to Financial Statements 15 STATE STREET MONEY MARKET PORTFOLIO PORTFOLIO OF INVESTMENTS JUNE 30, 2006 (UNAUDITED) NAME OF ISSUER INTEREST MATURITY PRINCIPAL AMORTIZED AND TITLE OF ISSUE RATE DATE AMOUNT COST + - ------------------ -------- ---------- ------------ ------------ BANK FOREIGN -- (CONTINUED) Royal Bank of Scotland 5.197% 11/20/2006 $ 75,000,000 $ 74,995,071 Societe Generale NY 5.204% 06/20/2007 95,000,000 94,977,406 Svenska Handelsbanken AB 5.110% 02/12/2007 50,000,000 49,993,859 UBS AG 5.315% 08/08/2006 150,000,000 150,000,000 ------------ TOTAL YANKEE CERTIFICATES OF DEPOSIT 994,963,232 ------------ EURO CERTIFICATES OF DEPOSIT -- 2.39% BANK FOREIGN -- 2.39% Societe Generale 5.310% 04/19/2007 20,000,000 20,000,000 ABN - AMRO London 5.335% 08/08/2006 75,000,000 75,000,394 HSBC Bank PLC 5.240% 11/08/2006 20,000,000 20,000,703 ------------ TOTAL EURO CERTIFICATES OF DEPOSIT 115,001,097 ------------ BANK NOTES -- 10.28% BANK DOMESTIC -- 7.48% American Express Bank FSB (b) 5.169% 03/15/2007 40,000,000 40,000,000 American Express Co. (b) 5.302% 07/20/2007 20,000,000 20,000,000 American Express Credit Corp. (b) 5.110% 01/09/2007 75,000,000 74,997,908 Bank of America NA (b) 5.315% 04/18/2007 50,000,000 50,000,000 JPMorgan Chase & Co. (b) 5.115% 08/02/2007 50,000,000 50,000,000 Marshall & Ilsley Bank (b) 5.070% 03/07/2007 75,000,000 74,989,888 National City Bank of Indiana (b) 5.109% 04/04/2007 50,000,000 50,007,208 ------------ 359,995,004 ------------ BANK FOREIGN -- 2.80% Alliance & Leicester PLC (a) (b) 5.330% 06/17/2007 35,000,000 35,000,000 BNP Paribas (a) (b) 5.144% 05/18/2007 25,000,000 25,000,000 HBOS Treasury Services PLC (a) (b) 5.120% 08/09/2007 25,000,000 25,000,000 National Australia Bank Ltd. (a) (b) 5.100% 08/07/2007 20,000,000 20,000,000 Unicredito Italiano Bank Ireland (a) (b) 5.209% 07/13/2007 15,000,000 15,000,000 Westpac Banking Corp. (a) (b) 5.178% 07/16/2007 15,000,000 15,000,000 ------------ 135,000,000 ------------ TOTAL BANK NOTES 494,995,004 ------------ MEDIUM TERM NOTE -- 1.56% FINANCE CAPTIVE CONSUMER -- 1.56% Toyota Motor Credit Corp. (b) 4.945% 07/02/2007 75,000,000 74,994,220 ------------ Total MEDIUM TERM NOTES 74,994,220 ------------ TIME DEPOSITS -- 1.88% Suntrust Bank 5.188% 07/03/2006 90,809,000 90,809,000 ------------ TOTAL TIME DEPOSITS 90,809,000 ------------ PROMISSORY NOTE -- 0.52% Goldman Sachs Group, Inc. (a) (c) 5.180% 12/18/2006 25,000,000 25,000,000 ------------ TOTAL PROMISSORY NOTE 25,000,000 ------------ REPURCHASE AGREEMENTS -- 39.44% ABN AMRO Inc. Tri Party Repo, dated 06/30/06 (collateralized by Corporate Notes, 5.800% - 6.875% due 06/15/09 - 05/01/14 valued at $78,750,001); proceeds $75,033,516 5.363% 07/03/2006 75,000,000 75,000,000 See Notes to Financial Statements 16 STATE STREET MONEY MARKET PORTFOLIO PORTFOLIO OF INVESTMENTS JUNE 30, 2006 (UNAUDITED) INTEREST MATURITY PRINCIPAL AMORTIZED NAME OF ISSUER AND TITLE OF ISSUE RATE DATE AMOUNT COST + - --------------------------------- -------- ---------- ------------ -------------- Bank of America Tri Party Repo, dated 06/30/06 (collateralized by Federal National Mortgage Association, 4.500% - 6.500% due 04/01/18 - 06/01/36, Government National Mortgage Association, 5.000% - 5.500% due 07/20/34 - 04/20/35, and Federal Home Loan Mortgage Corporation, 4.500% - 6.000% due 03/01/19 - 04/01/36 valued at $765,000,001); proceeds $750,331,250 5.300% 07/03/2006 $750,000,000 $ 750,000,000 Bear Stearns Tri Party Repo, dated 06/30/06 (collateralized by Asset- Backed Securities, 0.010% - 5.370% due 04/30/31 -09/25/45 valued at $51,001,254); proceeds $50,022,385 5.373% 07/03/2006 50,000,000 50,000,000 BNP Paribas Tri Party Repo, dated 06/30/06 (collateralized by Federal Home Loan Mortgage Corporation, 3.000%-6.175% due 01/15/15 - 05/15/36, Federal National Mortgage Association, 1.000%-7.500% due 06/25/10-06/25/36 valued at $719,100,000); proceeds $705,309,613 5.270% 07/03/2006 705,000,000 705,000,000 Credit Suisse First Boston Tri Party Repo, dated 06/30/06 (collateralized by Corporate Notes, 4.000% - 6.150% due 05/01/07 - 03/01/09 valued at $51,003,860); proceeds $50,022,344 5.363% 07/03/2006 50,000,000 50,000,000 Lehman Brothers Tri Party Repo, dated 06/30/06 (collateralized by Corporate Notes, 4.625% - 7.500% due 07/15/11 - 08/03/35 valued at $71,401,780); proceeds $70,031,223 5.353% 07/03/2006 70,000,000 70,000,000 UBS Warburg LLC Tri Party Repo, dated 06/30/06 (collateralized by Federal National Mortgage Association, 4.500% - 6.500% due 07/01/08 - 06/01/36 valued at $204,002,340); proceeds $200,090,000 5.400% 07/03/2006 200,000,000 200,000,000 -------------- TOTAL REPURCHASE AGREEMENTS 1,900,000,000 -------------- TOTAL INVESTMENTS -- 99.85% 4,809,722,433 OTHER ASSETS IN EXCESS OF LIABILITIES -- 0.15% 7,384,844 -------------- NET ASSETS -- 100.00% $4,817,107,277 ============== (a) 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. (b) Floating Rate Note- Interest rate shown is rate in effect at June 30, 2006. (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, 2006, this security represents 0.51% of net assets. + See Note 2 to the Notes to Financial Statements. See Notes to Financial Statements 17 STATE STREET MONEY MARKET PORTFOLIO STATEMENT OF ASSETS AND LIABILITIES JUNE 30, 2006 (UNAUDITED) ASSETS Investments in unaffiliated issuers, at amortized cost (Note 2) $2,909,722,433 Repurchase agreements (cost $1,900,000,000) (Note 2) 1,900,000,000 Cash 680 -------------- 4,809,723,113 Receivables: Interest receivable 7,734,132 Receivable from adviser (Note 3) 169,405 Prepaid expenses 32,340 -------------- Total assets 4,817,658,990 LIABILITIES Payables: Administration, custody and transfer agent fees (Note 3) 153,452 Investment advisory fee (Note 3) 374,150 Professional fees 19,730 Accrued expenses and other liabilities 4,381 -------------- Total Liabilities 551,713 -------------- NET ASSETS $4,817,107,277 ============== See Notes to Financial Statements. 18 STATE STREET MONEY MARKET PORTFOLIO STATEMENT OF OPERATIONS FOR THE SIX MONTHS ENDED JUNE 30, 2006 (UNAUDITED) INVESTMENT INCOME Interest $87,589,275 ----------- EXPENSES Management fees (Note 3) 1,812,192 Administration, custody and transfer agent fees (Note 3) 391,987 Professional fees 21,298 Trustees' fees 12,478 Printing fees 10,240 Other expenses 21,846 ----------- Total Expenses 2,270,041 Less: Fee waivers/reimbursements by investment adviser (Note 3) (457,849) ----------- Total Net Expenses 1,812,192 ----------- NET INVESTMENT INCOME 85,777,083 ----------- See Notes to Financial Statements. 19 STATE STREET MONEY MARKET PORTFOLIO STATEMENT OF CHANGES IN NET ASSETS For the Six Months Ended For the Year June 30, 2006 Ended (Unaudited) December 31, 2005 --------------- ----------------- INCREASE IN NET ASSETS FROM: OPERATIONS Net investment income $ 85,777,083 $ 26,739,971 Net realized gain on investments -- 2,656 --------------- --------------- Net increase in net assets resulting from operations 85,777,083 26,742,627 --------------- --------------- CAPITAL TRANSACTIONS Proceeds from contributions 10,516,059,887 8,537,558,832 Fair value of withdrawals (7,424,600,960) (7,306,145,697) --------------- --------------- Net increase in net assets from capital transactions 3,091,458,927 1,231,413,135 --------------- --------------- TOTAL NET INCREASE IN NET ASSETS 3,177,236,010 1,258,155,762 NET ASSETS Beginning of period 1,639,871,267 381,715,505 --------------- --------------- End of period $ 4,817,107,277 $ 1,639,871,267 =============== =============== See Notes to Financial Statements. 20 STATE STREET MONEY MARKET PORTFOLIO FINANCIAL HIGHLIGHTS The following table includes selected supplemental data and ratios to average net assets: FOR THE SIX MONTHS ENDED 6/30/2006 YEAR ENDED PERIOD ENDED (UNAUDITED) 12/31/2005 12/31/2004* ---------------- ---------- ------------ SUPPLEMENTAL DATA AND RATIOS: Net assets, end of period (in thousands) $4,817,107 $1,639,871 $381,716 Ratios to average net assets: Gross operating expenses 0.13%** 0.14% 0.18%** Net operating expenses 0.10%** 0.10% 0.10%** Net investment income 4.79%** 3.33% 1.71%** Total return (a) 2.37% 3.31% 0.68% - ---------- * The Portfolio commenced operations on August 12, 2004. ** 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. 21 STATE STREET MONEY MARKET PORTFOLIO NOTES TO FINANCIAL STATEMENTS JUNE 30, 2006 (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 six 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, and the State Street U.S. Government Money Market Portfolio. Information presented in these financial statements pertains only to the State Street Money Market Portfolio (the "Portfolio"). At June 30, 2006, only the Portfolio and State Street Equity 500 Index Portfolio were in operation. The Portfolio commenced operations on August 12, 2004. The Portfolio is authorized to issue an unlimited number of non-transferable beneficial interests. The Portfolio's investment objective is to maximize current income to the extent consistent with the preservation of capital and liquidity by investing in dollar denominated securities. 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: As permitted under Rule 2a-7 of the 1940 Act and certain conditions therein, securities are valued initially at cost and thereafter assume a constant amortization to maturity of any discount or premium. SECURITIES TRANSACTIONS, INVESTMENT INCOME AND EXPENSES: Securities transactions are recorded on a trade date basis. 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 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, 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. At June 30, 2006, the cost of investments for federal income tax purposes was the same as the cost for financial reporting purposes. 22 STATE STREET MONEY MARKET PORTFOLIO NOTES TO FINANCIAL STATEMENTS JUNE 30, 2006 (UNAUDITED) REPURCHASE AGREEMENTS: A repurchase agreement customarily obligates the seller at the time it sells securities to the Portfolio to repurchase the securities at a mutually agreed upon price and time which, in the case of the Portfolio's transactions, is within seven days. The total amount received by the Portfolio on repurchase is calculated to exceed the price paid by the Portfolio, reflecting an agreed-upon market rate of 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 the 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. The 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 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. 3. 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, 2007. For the period ended June 30, 2006, SSgA FM reimbursed the Portfolio $442,045 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 Portfolio pays State Street an annual fee, accrued daily at the rate of 1/365th of the applicable fee rate described below and payable monthly, of the following annual percentages of the Portfolio's average daily net assets during the month as follows: 23 STATE STREET MONEY MARKET PORTFOLIO NOTES TO FINANCIAL STATEMENTS JUNE 30, 2006 (UNAUDITED) Annual percentage of Asset Levels average daily net assets - ------------ -------------------------- First $200 Million 0.04% Next $200 Million 0.03 Thereafter 0.02 Minimum annual fee: Assets of $500 million and less $150,000 Assets of $500 million - $2 billion $200,000 with 0.01% waiver State Street has contractually agreed to waive 0.01% of its fees on an annual basis when the Portfolio's assets are between $500 million and $2 billion. For the period ended June 30, 2006, State Street waived $15,804 under this agreement. 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 $20,000. Each trustee is reimbursed for out-of-pocket and travel expenses. 5. INDEMNIFICATIONS Like many other companies, 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. 24 STATE STREET MONEY MARKET PORTFOLIO JUNE 30, 2006 (UNAUDITED) 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 is 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 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. 25 TRUSTEES Michael F. Holland William L. Boyan Rina K. Spence Douglas T. Williams 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 ACCOUNTANTS Ernst & Young LLP 200 Clarendon Street Boston, MA 02116 LEGAL COUNSEL Ropes & Gray LLP One International Place Boston, MA 02109 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 MONEY MARKET PORTFOLIO State Street Bank and Trust Company P.O. Box 5049 Boston, MA 02206 26 ITEM 2. CODE OF ETHICS. Disclosure required in Registrant's annual Form N-CSR ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. Disclosure required in Registrant's annual Form N-CSR ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. Disclosure required in Registrant's annual Form N-CSR 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 (Principal Executive Officer) By: /s/ Gary L. French --------------------------------- Gary L. French Treasurer (Principal Financial Officer) Date: August 24, 2006 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated. By: /s/ James E. Ross --------------------------------- James E. Ross President (Principal Executive Officer) By: /s/ Gary L. French --------------------------------- Gary L. French (Principal Financial Officer) Treasurer Date: August 24, 2006