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 811-07885 Name of Fund: Master Mid Cap Index Series of Quantitative Master Series Trust Fund Address: P.O. Box 9011 Princeton, NJ 08543-9011 Name and address of agent for service: Robert C. Doll, Jr., Chief Executive Officer, Master Mid Cap Index Series of Quantitative Master Series Trust, 800 Scudders Mill Road, Plainsboro, NJ 08536. Mailing address: P.O. Box 9011, Princeton, NJ 08543-9011 Registrant's telephone number, including area code: (609) 282-2800 Date of fiscal year end: 12/31/06 Date of reporting period: 01/01/06 - 12/31/06 Item 1 - Report to Stockholders Master Mid Cap Index Series of Quantitative Master Series Trust Annual Report, December 31, 2006 A Discussion With Your Fund's Portfolio Managers During the annual period, Master Mid Cap Index Series of Quantitative Master Series Trust met its objective of closely tracking the returns of its benchmark, the Standard & Poor's (S&P) MidCap 400 Index. How did the portfolio perform during the fiscal year in light of the existing market conditions? For the 12-month period ended December 31, 2006, Master Mid Cap Index Series had a net total return of +10.30%. For the same period, the benchmark S&P MidCap 400 Index returned +10.32%. As the returns indicate, the Series met its objective of closely tracking the performance of the S&P MidCap 400 Index, a market-weighted index composed of 400 common stocks issued by mid-capitalization companies in a wide range of businesses. As the value of the S&P MidCap 400 fluctuated during the past 12 months, the portfolio's performance generally tracked that of the Index. Following decent, but uninspiring, results in 2004 and 2005, U.S. equities surged forward in 2006, with the S&P 500 Index advancing 15.79% to close at 1,418. Small-cap stocks posted even stronger gains, with the Russell 2000 Index registering an 18.37% increase, thanks to exceptionally strong performance in the first few months of the year. 1 Key highlights of the 12-month period included weaker economic growth triggered by a slowdown in the U.S. housing market; a long-awaited pause in the Federal Reserve Board's (the Fed) interest rate-hiking campaign; threats of higher inflation; and robust corporate earnings, which rose by double-digit percentages for an unprecedented fifth consecutive year. Amid these crosscurrents, financial markets were left to weather a high degree of volatility. At the outset, a burgeoning corporate sector, ample liquidity and record levels of merger-and-acquisition (M&A) activity provided a solid backdrop for equity markets. During the first few months of 2006, U.S. stocks were solidly on an upward trajectory, posting the best first quarter gains in several years. Of note, the S&P 500 Index advanced 4.21% in the quarter, marking its largest gain since the fourth quarter of 2004 (+9.23%) and its best first quarter since 1999 (+4.98%). Growth continued outside of the housing and auto sectors (capital spending in particular expanded at a brisk pace); private equity deals, M&A action and corporate buy-backs abounded in high volumes; and corporate cash flows held steady. Notwithstanding such broad-based strength, evidence of an economic slowdown mounted. By May, we saw a striking shift in investor sentiment, triggered by a deceleration in consumer spending, rising energy prices, a slump in housing activity and uncertainty around the Fed policy and the sustainability of economic growth. Stock market volatility took on a more negative spin and eventually resulted in the first double-digit correction for U.S. equity markets in nearly four years. The average U.S. stock fell by about 12% and stocks outside the United States were hit even harder. The pullback could be attributed to several factors, not the least of which was that the lagged effects of higher interest rates and oil prices finally took their toll on both the 2 economy and stock prices. Further, a resurgence of inflation fears prompted the Fed to continue its interest rate tightening campaign. Under the auspices of new Chairman Ben Bernanke, the central bank ended the second quarter with its 17th consecutive 25 basis point interest rate hike since June 2004, bringing the target federal funds rate to 5.25%. As the second half of 2006 got underway, positive momentum returned to the market. The Fed made big news in August by finally ending its streak of interest rate increases. At the same time, commodity prices collapsed. After reaching an all-time high near $78 per barrel in July, crude oil ended the year at $61 per barrel. Stocks generally climbed back above the levels they reached prior to the market's earlier retrenchment. Most equity markets experienced one of their best third-quarter periods in several years, though there was a broad-based changing of the guard that favored larger-cap, higher-quality and more predictable stocks over smaller-cap, lower-quality and more cyclical securities (as was the trend early in the year). Macroeconomic uncertainty persisted in the third quarter. Investors struggled with moderating economic activity - real gross domestic product growth was estimated at 2%, compared to 2.6% in the second quarter and 5.6% in the first quarter. The magnitude of the housing downturn and its effect on the consumer sector was a significant wildcard. Weakness in the U.S. dollar was challenging the stability of currency markets. Moreover, tensions in the Middle East were heating up, and economic data offered a mixed outlook for inflation. Still, strong momentum continued in the equity markets during the year's final quarter. Key to investors' optimism were: a strong labor market, where the unemployment rate reached a post-9/11 low and year-on-year average hourly salaries reached a post-9/11 high; receding risks of 3 higher inflation and high oil prices; and finally, the pervasive strength in corporate fundamentals that included reasonably good investment levels, healthy balance sheets and profit margins. 2006 ended and the new year began with the world awash in liquidity, global economic growth still quite strong despite the U.S. slowdown, record-high corporate profitability, fairly low inflation and interest rates, and relatively strong investor confidence. For the 12-month period, mid cap stocks, as measured by the S&P MidCap 400 Index, underperformed both small and large cap stocks. The S&P MidCap 400 Index returned +10.32%, while the S&P SmallCap 600 Index returned +15.12% and the large-cap S&P 500 Index returned +15.79%. In terms of sector performance, with the exception of health care, each of the 10 S&P MidCap 400 sectors posted positive returns for the 12-month period. The top performer was telecommunication services, which was up +46.98%, followed by utilities and materials, with respective returns of +18.12% and +14.23%. At the bottom was health care, which posted a return of -1.16%, followed by the consumer discretionary and energy sectors, with respective returns of +1.69% and +1.94%. What changes were made to the portfolio during the period? Throughout the year, as changes were made to the composition of the S&P MidCap 400 Index, the portfolio purchased and sold securities to maintain its objective of replicating the risks and return of the benchmark. How would you characterize the portfolio's position at the close of the period? Heading into 2007, we believe continued moderation in economic growth will put pressure on corporate earnings, which have been on a record run with five consecutive 4 years of double-digit growth. Solid corporate fundamentals and balance sheet strength, alongside strong non-U.S. economic growth, should help corporate profits remain positive, but the rate of gain will likely slow noticeably, as record-high profit margins will be difficult to sustain. Against this backdrop, the portfolio remains positioned to match the risk characteristics of its benchmark, whatever direction the market takes. Debra L. Jelilian Vice President and Co-Portfolio Manager Jeffrey L. Russo, CFA Vice President and Co-Portfolio Manager January 22, 2007 5 Master Mid Cap Index Series Portfolio Information as of December 31, 2006 Sector Representation Percent of Total Investments - -------------------------------------------------------------------------------- Financials 17.0% Industrials 14.5 Consumer Discretionary 14.0 Information Technology 13.8 Health Care 10.0 Utilities 7.4 Energy 6.9 Materials 5.2 Consumer Staples 2.1 Telecommunication Services 0.5 Other* 8.6 - -------------------------------------------------------------------------------- * Includes portfolio holdings in short-term investments. For Series compliance purposes, the Series' sector classifications refer to any one or more of the industry sub-classifications used by one or more widely recognized market indexes or ratings group indexes, and/or as defined by Series management. This definition may not apply for purposes of this report, which may combine sector sub-classifications for reporting ease. 6 Master Mid Cap Index Series Schedule of Investments as of December 31, 2006 Shares Industry Held Common Stocks Value - --------------------------------------------------------------------------------------------------------------------------------- Aerospace & Defense - 1.3% 3,599 Alliant Techsystems, Inc. (a) $ 281,406 4,200 DRS Technologies, Inc. 221,256 13,684 Precision Castparts Corp. 1,071,184 ------------ 1,573,846 - --------------------------------------------------------------------------------------------------------------------------------- Air Freight & Logistics - 1.3% 17,296 CH Robinson Worldwide, Inc. (e) 707,233 21,314 Expeditors International Washington, Inc. 863,217 ------------ 1,570,450 - --------------------------------------------------------------------------------------------------------------------------------- Airlines - 0.4% 8,400 AirTran Holdings, Inc. (a) 98,616 4,224 Alaska Air Group, Inc. (a) 166,848 17,762 JetBlue Airways Corp. (a)(b) 252,220 ------------ 517,684 - --------------------------------------------------------------------------------------------------------------------------------- Auto Components - 0.9% 7,045 ArvinMeritor, Inc. 128,430 1,040 Bandag, Inc. 52,447 5,905 BorgWarner, Inc. 348,513 14,127 Gentex Corp. 219,816 7,001 Lear Corp. 206,740 2,921 Modine Manufacturing Co. 73,113 ------------ 1,029,059 - --------------------------------------------------------------------------------------------------------------------------------- Automobiles - 0.1% 3,362 Thor Industries, Inc. 147,894 - --------------------------------------------------------------------------------------------------------------------------------- Beverages - 0.3% 5,700 Hansen Natural Corp. (a) 191,691 5,507 PepsiAmericas, Inc. 115,537 ------------ 307,228 - --------------------------------------------------------------------------------------------------------------------------------- Biotechnology - 1.3% 6,180 Cephalon, Inc. (a) 435,134 3,475 Martek Biosciences Corp. (a) 81,107 30,752 Millennium Pharmaceuticals, Inc. (a) 335,197 11,788 PDL BioPharma, Inc. (a) 237,410 11,454 Vertex Pharmaceuticals, Inc. (a) 428,609 ------------ 1,517,457 - --------------------------------------------------------------------------------------------------------------------------------- Capital Markets - 2.2% 7,392 AG Edwards, Inc. 467,840 12,385 Eaton Vance Corp. 408,829 6,351 Investors Financial Services Corp. 270,997 9,972 Jefferies Group, Inc. New Shares 267,449 7,380 Nuveen Investments, Inc. Class A 382,874 8,654 Raymond James Financial, Inc. 262,303 6,526 SEI Investments Co. 388,689 8,951 Waddell & Reed Financial, Inc. Class A 244,899 ------------ 2,693,880 - --------------------------------------------------------------------------------------------------------------------------------- Chemicals - 3.1% 7,486 Airgas, Inc. 303,333 4,181 Albemarle Corp. 300,196 6,611 Cabot Corp. 288,041 23,193 Chemtura Corp. 223,349 3,989 Cytec Industries, Inc. 225,418 4,062 FMC Corp. 310,946 3,681 Ferro Corp. 76,160 6,549 Lubrizol Corp. 328,301 21,048 Lyondell Chemical Co. 538,197 1,987 Minerals Technologies, Inc. 116,816 7,848 Olin Corp. 129,649 11,224 RPM International, Inc. 234,469 4,866 The Scotts Miracle-Gro Co. 251,329 4,124 Sensient Technologies Corp. 101,450 10,136 Valspar Corp. 280,159 ------------ 3,707,813 - --------------------------------------------------------------------------------------------------------------------------------- 7 Master Mid Cap Index Series Schedule of Investments as of December 31, 2006 Shares Industry Held Common Stocks Value - --------------------------------------------------------------------------------------------------------------------------------- Commercial Banks - 3.1% 12,826 Associated Banc-Corp. 447,371 4,831 Bank of Hawaii Corp. $ 260,632 4,800 Cathay General Bancorp 165,648 4,187 City National Corp. 298,114 16,000 The Colonial BancGroup, Inc. 411,840 5,762 Cullen/Frost Bankers, Inc. 321,635 8,129 FirstMerit Corp. 196,234 5,208 Greater Bay Bancorp 137,127 12,232 Mercantile Bankshares Corp. 572,335 3,750 SVB Financial Group (a) 174,825 11,265 TCF Financial Corp. 308,886 3,264 Westamerica Bancorp. 165,256 6,583 Wilmington Trust Corp. 277,605 ------------ 3,737,508 - --------------------------------------------------------------------------------------------------------------------------------- Commercial Services & Supplies 8,575 Adesa, Inc. 237,956 - - 3.7% 2,546 Banta Corp. 92,674 4,861 The Brink's Co. 310,715 8,170 ChoicePoint, Inc. (a) 321,735 6,688 Copart, Inc. (a) 200,640 4,125 Corporate Executive Board Co. 361,762 5,214 Deluxe Corp. 131,393 6,364 Dun & Bradstreet Corp. (a) 526,876 4,718 HNI Corp. 209,526 6,242 Herman Miller, Inc. 226,959 1,781 Kelly Services, Inc. Class A 51,542 4,039 Korn/Ferry International (a) 92,735 8,798 Manpower, Inc. 659,234 2,800 Mine Safety Appliances Co. 102,620 4,900 Navigant Consulting, Inc. (a) 96,824 11,744 Republic Services, Inc. Class A 477,628 2,606 Rollins, Inc. 57,619 4,355 Stericycle, Inc. (a) 328,803 ------------ 4,487,241 - --------------------------------------------------------------------------------------------------------------------------------- Communications Equipment - 2.0% 40,981 3Com Corp. (a) 168,432 6,757 Adtran, Inc. 153,384 15,100 Andrew Corp. (a) 154,473 5,383 Avocent Corp. (a) 182,215 6,100 CommScope, Inc. (a) 185,928 3,702 Dycom Industries, Inc. (a) 78,186 4,175 F5 Networks, Inc. (a) 309,827 13,339 Harris Corp. 611,727 4,318 Plantronics, Inc. 91,542 8,582 Polycom, Inc. (a) 265,270 12,093 Powerwave Technologies, Inc. (a) 78,000 11,388 UTstarcom, Inc. (a)(b) 99,645 ------------ 2,378,629 - --------------------------------------------------------------------------------------------------------------------------------- Computers & Peripherals - 1.0% 6,824 Diebold, Inc. 317,998 3,599 Imation Corp. 167,102 14,563 McData Corp. (a) 80,825 10,800 Palm, Inc. (a) 152,172 21,600 Western Digital Corp. (a) 441,936 ------------ 1,160,033 - --------------------------------------------------------------------------------------------------------------------------------- Construction & Engineering 3,281 Granite Construction, Inc. 165,100 - - 0.7% 5,861 Jacobs Engineering Group, Inc. (a) 477,906 11,483 Quanta Services, Inc. (a) 225,871 ------------ 868,877 - --------------------------------------------------------------------------------------------------------------------------------- 8 Master Mid Cap Index Series Schedule of Investments as of December 31, 2006 Shares Industry Held Common Stocks Value - --------------------------------------------------------------------------------------------------------------------------------- Construction Materials - 0.6% 4,700 Florida Rock Industries, Inc. $ 202,335 4,683 Martin Marietta Materials, Inc. 486,611 ------------ 688,946 - --------------------------------------------------------------------------------------------------------------------------------- Consumer Finance - 0.5% 11,306 AmeriCredit Corp. (a) 284,572 8,200 MoneyGram International, Inc. 257,152 ------------ 541,724 - --------------------------------------------------------------------------------------------------------------------------------- Containers & Packaging - 0.4% 7,588 Packaging Corp. of America 167,695 9,520 Sonoco Products Co. 362,331 ------------ 530,026 - --------------------------------------------------------------------------------------------------------------------------------- Diversified Consumer Services 9,548 Career Education Corp. (a) 236,599 - - 1.2% 8,638 Corinthian Colleges, Inc. (a) 117,736 5,874 DeVry, Inc. 164,472 3,424 ITT Educational Services, Inc. (a) 227,251 4,964 Laureate Education, Inc. (a) 241,399 4,762 Regis Corp. 188,289 5,775 Sotheby's Holdings, Inc. Class A 179,141 1,350 Strayer Education, Inc. 143,168 ------------ 1,498,055 - --------------------------------------------------------------------------------------------------------------------------------- Diversified Financial Services 15,834 Leucadia National Corp. 446,519 - - 0.4% - --------------------------------------------------------------------------------------------------------------------------------- Diversified Telecommunication 23,339 Cincinnati Bell, Inc. (a) 106,659 Services - 0.1% - --------------------------------------------------------------------------------------------------------------------------------- Electric Utilities - 2.2% 11,899 DPL, Inc. 330,554 8,104 Duquesne Light Holdings, Inc. 160,864 8,386 Great Plains Energy, Inc. 266,675 7,676 Hawaiian Electric Industries, Inc. 208,403 4,618 IDACORP, Inc. 178,486 15,216 Northeast Utilities 428,483 18,558 Pepco Holdings, Inc. 482,694 21,218 Sierra Pacific Resources (a) 357,099 8,823 Westar Energy, Inc. 229,045 ------------ 2,642,303 - --------------------------------------------------------------------------------------------------------------------------------- Electrical Equipment - 1.0% 10,077 Ametek, Inc. 320,852 5,780 Hubbell, Inc. Class B 261,314 8,400 Roper Industries, Inc. 422,016 5,027 Thomas & Betts Corp. (a) 237,677 ------------ 1,241,859 - --------------------------------------------------------------------------------------------------------------------------------- Electronic Equipment & Instruments 8,900 Amphenol Corp. Class A 552,512 - - 2.3% 11,813 Arrow Electronics, Inc. (a) 372,700 13,213 Avnet, Inc. (a) 337,328 6,157 CDW Corp. 432,960 13,300 Ingram Micro, Inc. Class A (a) 271,453 7,783 Kemet Corp. (a) 56,816 5,286 National Instruments Corp. 143,991 3,781 Newport Corp. (a) 79,212 4,446 Plexus Corp. (a) 106,170 5,770 Tech Data Corp. (a) 218,510 17,810 Vishay Intertechnology, Inc. (a) 241,147 ------------ 2,812,799 - --------------------------------------------------------------------------------------------------------------------------------- Energy Equipment & Services - 3.3% 11,448 Cameron International Corp. (a) 607,316 15,572 ENSCO International, Inc. 779,534 7,038 FMC Technologies, Inc. (a) 433,752 12,985 Grant Prideco, Inc. (a) 516,413 9,846 Hanover Compressor Co. (a) 185,991 10,222 Helmerich & Payne, Inc. 250,132 9 Master Mid Cap Index Series Schedule of Investments as of December 31, 2006 Shares Industry Held Common Stocks Value - --------------------------------------------------------------------------------------------------------------------------------- 16,187 Patterson-UTI Energy, Inc. $ 376,024 15,967 Pride International, Inc. (a) 479,170 6,101 Tidewater, Inc. 295,044 ------------ 3,923,376 - --------------------------------------------------------------------------------------------------------------------------------- Food & Staples Retailing - 0.2% 6,745 BJ's Wholesale Club, Inc. (a) 209,837 3,140 Ruddick Corp. 87,135 ------------ 296,972 - --------------------------------------------------------------------------------------------------------------------------------- Food Products - 0.8% 6,979 Hormel Foods Corp. 260,596 6,020 The J.M. Smucker Co. 291,789 2,661 Lancaster Colony Corp. 117,909 10,300 Smithfield Foods, Inc. (a) 264,298 2,268 Tootsie Roll Industries, Inc. 74,164 ------------ 1,008,756 - --------------------------------------------------------------------------------------------------------------------------------- Gas Utilities - 1.5% 7,818 AGL Resources, Inc. 304,198 12,415 Equitable Resources, Inc. 518,326 8,408 National Fuel Gas Co. 324,044 11,282 Oneok, Inc. 486,480 5,248 WGL Holdings, Inc. 170,980 ------------ 1,804,028 - --------------------------------------------------------------------------------------------------------------------------------- Health Care Equipment & Supplies 6,069 Advanced Medical Optics, Inc. (a) 213,629 - - 3.1% 6,433 Beckman Coulter, Inc. 384,693 10,894 Cytyc Corp. (a) 308,300 15,710 Dentsply International, Inc. 468,943 5,895 Edwards Lifesciences Corp. (a) 277,301 5,075 Gen-Probe, Inc. (a) 265,778 6,355 Hillenbrand Industries, Inc. 361,790 3,725 Intuitive Surgical, Inc. (a) 357,228 7,100 Resmed, Inc. (a) 349,462 6,094 Steris Corp. 153,386 13,103 Varian Medical Systems, Inc. (a) 623,310 ------------ 3,763,820 - --------------------------------------------------------------------------------------------------------------------------------- Health Care Providers & Services 4,542 Apria Healthcare Group, Inc. (a) 121,044 - - 3.0% 9,606 Community Health Systems, Inc. (a) 350,811 11,763 Health Net, Inc. (a) 572,388 8,578 Henry Schein, Inc. (a) 420,150 5,733 LifePoint Hospitals, Inc. (a) 193,202 9,613 Lincare Holdings, Inc. (a) 382,982 12,350 Omnicare, Inc. 477,081 5,300 Psychiatric Solutions, Inc. (a) 198,856 8,545 Triad Hospitals, Inc. (a) 357,437 5,877 Universal Health Services, Inc. Class B 325,762 8,050 VCA Antech, Inc. (a) 259,130 ------------ 3,658,843 - --------------------------------------------------------------------------------------------------------------------------------- Hotels, Restaurants & Leisure 7,601 Applebee's International, Inc. 187,517 - - 1.7% 3,755 Bob Evans Farms, Inc. 128,496 4,520 Boyd Gaming Corp. 204,801 12,835 Brinker International, Inc. 387,104 3,304 CBRL Group, Inc. 147,887 8,232 The Cheesecake Factory, Inc. (a) 202,507 3,364 International Speedway Corp. Class A 171,699 7,149 OSI Restaurant Partners, Inc. 280,241 5,743 Ruby Tuesday, Inc. 157,588 6,900 Scientific Games Corp. Class A (a) 208,587 ------------ 2,076,427 - --------------------------------------------------------------------------------------------------------------------------------- 10 Master Mid Cap Index Series Schedule of Investments as of December 31, 2006 Shares Industry Held Common Stocks Value - --------------------------------------------------------------------------------------------------------------------------------- Household Durables - 1.6% 6,082 American Greetings Class A $ 145,177 4,050 Beazer Homes USA, Inc. 190,390 2,124 Blyth, Inc. 44,073 5,301 Furniture Brands International, Inc. 86,035 3,433 Hovnanian Enterprises, Inc. Class A (a) 116,379 3,600 MDC Holdings, Inc. 205,380 5,230 Mohawk Industries, Inc. (a) 391,518 4,517 Ryland Group, Inc. 246,719 12,277 Toll Brothers, Inc. (a) 395,688 5,645 Tupperware Corp. 127,633 ------------ 1,948,992 - --------------------------------------------------------------------------------------------------------------------------------- Household Products - 0.6% 6,443 Church & Dwight Co., Inc. 274,794 5,870 Energizer Holdings, Inc. (a) 416,711 ------------ 691,505 - --------------------------------------------------------------------------------------------------------------------------------- IT Services - 2.0% 7,199 Acxiom Corp. 184,654 6,481 Alliance Data Systems Corp. (a) 404,868 12,591 The BISYS Group, Inc. (a) 162,550 5,158 CSG Systems International, Inc. (a) 137,873 13,425 Ceridian Corp. (a)(e) 375,631 9,054 CheckFree Corp. (a) 363,609 6,057 DST Systems, Inc. (a) 379,350 5,227 Gartner, Inc. Class A (a) 103,442 9,788 MPS Group, Inc. (a) 138,794 3,800 SRA International, Inc. Class A (a) 101,612 ------------ 2,352,383 - --------------------------------------------------------------------------------------------------------------------------------- Independent Power Producers & 3,474 Black Hills Corp. 128,330 Energy Traders - 0.1% - --------------------------------------------------------------------------------------------------------------------------------- Industrial Conglomerates - 0.5% 2,921 Carlisle Cos., Inc. 229,298 581 Sequa Corp. Class A (a) 66,850 4,152 Teleflex, Inc. 268,053 ------------ 564,201 - --------------------------------------------------------------------------------------------------------------------------------- Insurance - 4.4% 6,574 American Financial Group, Inc. 236,072 9,561 Arthur J. Gallagher & Co. 282,528 11,110 Brown & Brown, Inc. (e) 313,413 6,630 Everest Re Group Ltd. 650,469 21,168 Fidelity National Title Group, Inc. Class A 505,492 9,729 First American Corp. 395,776 10,699 HCC Insurance Holdings, Inc. 343,331 4,930 The Hanover Insurance Group, Inc. 240,584 3,700 Horace Mann Educators Corp. 74,740 3,250 Mercury General Corp. 171,373 6,462 Ohio Casualty Corp. 192,632 23,001 Old Republic International Corp. 535,463 6,670 Protective Life Corp. 316,825 5,162 Stancorp Financial Group, Inc. 232,548 4,064 Unitrin, Inc. 203,647 16,766 W.R. Berkley Corp. 578,595 ------------ 5,273,488 - --------------------------------------------------------------------------------------------------------------------------------- Internet & Catalog Retail - 0.1% 6,100 Coldwater Creek, Inc. (a) 149,572 - --------------------------------------------------------------------------------------------------------------------------------- Internet Software & Services - 9,270 ValueClick, Inc. (a) 219,050 0.2% - --------------------------------------------------------------------------------------------------------------------------------- Leisure Equipment & Products - 6,110 Callaway Golf Co. 88,045 0.1% - --------------------------------------------------------------------------------------------------------------------------------- 11 Master Mid Cap Index Series Schedule of Investments as of December 31, 2006 Shares Industry Held Common Stocks Value - --------------------------------------------------------------------------------------------------------------------------------- Life Sciences Tools & Services - 7,100 Affymetrix, Inc. (a) $ 163,726 1.6% 7,074 Charles River Laboratories International, Inc. (a) 305,950 6,318 Covance, Inc. (a) 372,193 5,075 Invitrogen Corp. (a) 287,194 10,000 Pharmaceutical Product Development, Inc. 322,200 3,725 Techne Corp. (a) 206,551 3,321 Varian, Inc. (a) 148,748 3,060 Ventana Medical Systems, Inc. (a) 131,672 ------------ 1,938,234 - --------------------------------------------------------------------------------------------------------------------------------- Machinery - 3.7% 9,005 AGCO Corp. (a) 278,615 4,791 Crane Co. 175,542 6,805 Donaldson Co., Inc. 236,202 4,200 Federal Signal Corp. 67,368 5,514 Flowserve Corp. (a) 278,292 6,483 Graco, Inc. 256,856 4,062 Harsco Corp. 309,118 11,762 Joy Global, Inc. 568,575 4,100 Kennametal, Inc. 241,285 4,300 Lincoln Electric Holdings, Inc. 259,806 3,599 Nordson Corp. 179,338 7,200 Oshkosh Truck Corp. 348,624 9,754 Pentair, Inc. 306,276 5,980 SPX Corp. 365,737 9,075 Timken Co. 264,809 7,703 Trinity Industries, Inc. 271,146 ------------ 4,407,589 - --------------------------------------------------------------------------------------------------------------------------------- Marine - 0.2% 4,421 Alexander & Baldwin, Inc. 196,027 - --------------------------------------------------------------------------------------------------------------------------------- Media - 1.4% 8,126 Belo Corp. Class A 149,275 3,943 Catalina Marketing Corp. 108,432 3,245 Entercom Communications Corp. 91,444 4,917 Harte-Hanks, Inc. 136,250 4,050 John Wiley & Sons, Inc. Class A 155,804 4,162 Lee Enterprises, Inc. 129,272 2,131 Media General, Inc. Class A 79,209 8,855 The Reader's Digest Association, Inc. Class A 147,879 2,905 Scholastic Corp. (a) 104,115 4,767 Valassis Communications, Inc. (a) 69,122 565 The Washington Post Class B 421,264 5,907 Westwood One, Inc. 41,703 ------------ 1,633,769 - --------------------------------------------------------------------------------------------------------------------------------- Metals & Mining - 0.8% 12,300 Commercial Metals Co. 317,340 6,600 Reliance Steel & Aluminum Co. 259,908 9,400 Steel Dynamics, Inc. 305,030 6,827 Worthington Industries, Inc. 120,974 ------------ 1,003,252 - --------------------------------------------------------------------------------------------------------------------------------- Multi-Utilities - 3.5% 12,113 Alliant Energy Corp. 457,508 35,335 Aquila, Inc. (a) 166,074 14,181 Energy East Corp. 351,689 17,428 MDU Resources Group, Inc. 446,854 10,679 NSTAR 366,930 9,419 OGE Energy Corp. 376,760 7,374 PNM Resources, Inc. 229,331 11,605 Puget Energy, Inc. 294,303 11,316 SCANA Corp. 459,656 12 Master Mid Cap Index Series Schedule of Investments as of December 31, 2006 Shares Industry Held Common Stocks Value - --------------------------------------------------------------------------------------------------------------------------------- 7,126 Vectren Corp. $ 201,523 4,543 WPS Resources Corp. 245,458 11,729 Wisconsin Energy Corp. 556,658 ------------ 4,152,744 - --------------------------------------------------------------------------------------------------------------------------------- Multiline Retail - 0.5% 4,976 99 Cents Only Stores (a) 60,558 10,513 Dollar Tree Stores, Inc. (a) 316,441 14,171 Saks, Inc. 252,527 ------------ 629,526 - --------------------------------------------------------------------------------------------------------------------------------- Office Electronics - 0.2% 6,896 Zebra Technologies Corp. Class A (a) 239,912 - --------------------------------------------------------------------------------------------------------------------------------- Oil, Gas & Consumable Fuels - 3.7% 14,110 Arch Coal, Inc. 423,723 11,550 Denbury Resources, Inc. (a) 320,975 5,857 Forest Oil Corp. (a) 191,407 13,015 Newfield Exploration Co. (a) 598,039 17,665 Noble Energy, Inc. 866,822 3,024 Overseas Shipholding Group 170,251 12,454 Pioneer Natural Resources Co. 494,299 7,754 Plains Exploration & Production Co. (a) 368,548 5,739 Pogo Producing Co. 277,997 5,800 Quicksilver Resources, Inc. (a) 212,222 16,800 Southwestern Energy Co. (a) 588,840 ------------ 4,513,123 - --------------------------------------------------------------------------------------------------------------------------------- Paper & Forest Products - 0.3% 5,930 Bowater, Inc. 133,425 9,810 Louisiana-Pacific Corp. 211,209 4,125 P.H. Glatfelter Co. 63,938 ------------ 408,572 - --------------------------------------------------------------------------------------------------------------------------------- Personal Products - 0.1% 7,200 Alberto-Culver Co. 154,440 - --------------------------------------------------------------------------------------------------------------------------------- Pharmaceuticals - 1.0% 5,700 Medicis Pharmaceutical Corp. Class A 200,241 3,883 Par Pharmaceutical Cos., Inc. (a) 86,863 7,283 Perrigo Co. 125,996 11,070 Sepracor, Inc. (a) 681,691 8,973 Valeant Pharmaceuticals International 154,695 ------------ 1,249,486 - --------------------------------------------------------------------------------------------------------------------------------- Real Estate Investment Trusts 8,786 AMB Property Corp. 514,947 (REITs) - 4.6% 11,025 Developers Diversified Realty Corp. (b) 694,024 5,764 Highwoods Properties, Inc. 234,941 8,210 Hospitality Properties Trust 390,221 9,298 Liberty Property Trust 456,904 7,086 Longview Fibre Co. 155,538 7,200 The Macerich Co. 623,304 6,505 Mack-Cali Realty Corp. 331,755 10,380 New Plan Excel Realty Trust 285,242 4,163 Potlatch Corp. 182,423 7,316 Rayonier, Inc. 300,322 6,725 Regency Centers Corp. 525,693 13,875 United Dominion Realty Trust, Inc. 441,086 7,575 Weingarten Realty Investors 349,283 ------------ 5,485,683 - --------------------------------------------------------------------------------------------------------------------------------- Road & Rail - 0.9% 10,360 Avis Budget Group, Inc. 224,708 4,595 Con-way, Inc. 202,364 11,096 JB Hunt Transport Services, Inc. 230,464 5,498 Swift Transportation Co., Inc. (a) 144,432 13 Master Mid Cap Index Series Schedule of Investments as of December 31, 2006 Shares Industry Held Common Stocks Value - --------------------------------------------------------------------------------------------------------------------------------- 5,433 Werner Enterprises, Inc. $ 94,969 5,906 YRC Worldwide, Inc. (a) 222,833 ------------ 1,119,770 - --------------------------------------------------------------------------------------------------------------------------------- Semiconductors & Semiconductor 41,670 Atmel Corp. (a) 252,103 Equipment - 3.7% 7,543 Cree, Inc. (a)(b) 130,645 13,587 Cypress Semiconductor Corp. (a) 229,213 12,007 Fairchild Semiconductor International, Inc. (a) 201,838 19,420 Integrated Device Technology, Inc. (a) 300,622 7,324 International Rectifier Corp. (a) 282,194 14,463 Intersil Corp. Class A 345,955 14,379 Lam Research Corp. (a) 727,865 10,523 Lattice Semiconductor Corp. (a) 68,189 16,650 MEMC Electronic Materials, Inc. (a) 651,681 5,567 Micrel, Inc. (a) 60,012 21,796 Microchip Technology, Inc. 712,729 20,071 RF Micro Devices, Inc. (a) 136,282 7,407 Semtech Corp. (a) 96,809 5,764 Silicon Laboratories, Inc. (a) 199,723 12,645 TriQuint Semiconductor, Inc. (a) 56,903 ------------ 4,452,763 - --------------------------------------------------------------------------------------------------------------------------------- Software - 2.6% 25,621 Activision, Inc. (a)(e) 441,706 1,800 Advent Software, Inc. (a) 63,522 27,929 Cadence Design Systems, Inc. (a) 500,208 5,936 Fair Isaac Corp. 241,298 7,617 Jack Henry & Associates, Inc. 163,004 5,602 Macrovision Corp. (a) 158,313 15,637 McAfee, Inc. (a) 443,778 7,643 Mentor Graphics Corp. (a) 137,803 10,800 Parametric Technology Corp. (a) 194,616 9,339 Sybase, Inc. (a) 230,673 13,569 Synopsys, Inc. (a) 362,699 3,521 Transaction Systems Architects, Inc. Class A (a) 114,679 7,583 Wind River Systems, Inc. (a) 77,726 ------------ 3,130,025 - --------------------------------------------------------------------------------------------------------------------------------- Specialty Retail - 5.9% 8,748 Abercrombie & Fitch Co. Class A 609,123 10,275 Advance Auto Parts 365,379 5,500 Aeropostale, Inc. (a) 169,785 19,927 American Eagle Outfitters, Inc. 621,922 7,420 AnnTaylor Stores Corp. (a) 243,673 5,276 Barnes & Noble, Inc. 209,510 6,583 Borders Group, Inc. 147,130 10,461 Carmax, Inc. (a)(e) 561,023 12,700 Charming Shoppes, Inc. (a) 171,831 17,284 Chico's FAS, Inc. (a) 357,606 9,701 Claire's Stores, Inc. 321,491 3,420 Dick's Sporting Goods, Inc. (a) 167,546 15,225 Foot Locker, Inc. 333,884 7,300 GameStop Corp. Class A (a) 402,303 10,923 O'Reilly Automotive, Inc. (a) 350,191 14,341 PetSmart, Inc. 413,881 7,373 Pacific Sunwear of California, Inc. (a) 144,363 6,845 Payless Shoesource, Inc. (a) 224,653 6,982 Rent-A-Center, Inc. (a) 206,039 14 Master Mid Cap Index Series Schedule of Investments as of December 31, 2006 Shares Industry Held Common Stocks Value - --------------------------------------------------------------------------------------------------------------------------------- 14,481 Ross Stores, Inc. $ 424,293 10,775 Urban Outfitters, Inc. (a) 248,148 11,169 Williams-Sonoma, Inc. 351,153 ------------ 7,044,927 - --------------------------------------------------------------------------------------------------------------------------------- Textiles, Apparel & Luxury 9,900 Hanesbrands, Inc. (a) 233,838 Goods - 0.7% 5,950 Polo Ralph Lauren Corp. 462,077 4,986 Timberland Co. Class A (a) 157,458 ------------ 853,373 - --------------------------------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance 8,229 Astoria Financial Corp. 248,187 - - 2.1% 11,500 First Niagara Financial Group, Inc. 170,890 7,051 IndyMac Bancorp, Inc. 318,423 25,138 New York Community Bancorp, Inc. 404,722 8,929 The PMI Group, Inc. 421,181 8,361 Radian Group, Inc. 450,742 8,213 Washington Federal, Inc. 193,252 5,364 Webster Financial Corp. 261,334 ------------ 2,468,731 - --------------------------------------------------------------------------------------------------------------------------------- Tobacco - 0.1% 2,852 Universal Corp. 139,777 - --------------------------------------------------------------------------------------------------------------------------------- Trading Companies & 12,502 Fastenal Co. 448,572 Distributors - 0.9% 5,395 GATX Corp. 233,765 5,200 MSC Industrial Direct Co. Class A 203,580 6,599 United Rentals, Inc. (a) 167,813 ------------ 1,053,730 - --------------------------------------------------------------------------------------------------------------------------------- Water Utilities - 0.2% 12,601 Aqua America, Inc. (b) 287,051 - --------------------------------------------------------------------------------------------------------------------------------- Wireless Telecommunication 4,558 Telephone & Data Systems, Inc. 247,636 Services - 0.4% 5,583 Telephone & Data Systems, Inc. (Special Shares) 276,917 ------------ 524,553 - --------------------------------------------------------------------------------------------------------------------------------- Total Common Stocks (Cost - $78,584,159) - 92.4% 111,241,334 - --------------------------------------------------------------------------------------------------------------------------------- Beneficial Interest Short-Term Securities - --------------------------------------------------------------------------------------------------------------------------------- $ 9,005,937 BlackRock Liquidity Series, LLC Cash Sweep Series, 5.26% (c)(d) 9,005,937 1,428,500 BlackRock Liquidity Series, LLC Money Market Series, 5.29% (c)(d)(f) 1,428,500 - --------------------------------------------------------------------------------------------------------------------------------- Total Short-Term Securities (Cost - $10,434,437) - 8.7% 10,434,437 - --------------------------------------------------------------------------------------------------------------------------------- Total Investments (Cost - $89,018,596*) - 101.1% 121,675,771 Liabilities in Excess of Other Assets - (1.1%) (1,311,249) ------------ Net Assets - 100.0% $120,364,522 ============ * The cost and unrealized appreciation (depreciation) of investments as of December 31, 2006, as computed for federal income tax purposes, were as follows: Aggregate cost $ 90,013,481 ============ Gross unrealized appreciation $ 33,584,324 Gross unrealized deprecation (1,922,034) ------------ Net unrealized appreciation $ 31,662,290 ============ (a) Non-income producing security. (b) Security, or a portion of security, is on loan. (c) Investments in companies considered to be an affiliate of the Fund, for purposes of Section 2(a)(3) of the Investment Company Act of 1940, were as follows: ------------------------------------------------------------------------------------ Net Interest Affiliate Activity Income ------------------------------------------------------------------------------------ BlackRock Liquidity Series, LLC Cash Sweep Series $(14,836,561) $ 646,091 BlackRock Liquidity Series, LLC Money Market Series $ (358,600) $ 7,662 ------------------------------------------------------------------------------------ 15 Master Mid Cap Index Series Schedule of Investments as of December 31, 2006 (d) Represents the current yield as of December 31, 2006. (e) All or a portion of security held as collateral in connection with financial futures contracts. (f) Security was purchased with the cash proceeds from securities loans. o For Series compliance purposes, the Series' industry classifications refer to any one or more of the industry sub-classifications used by one or more widely recognized market indexes or ratings group indexes, and/or as defined by Series management. This definition may not apply for purposes of this report, which may combine industry sub-classifications for reporting ease. Industries are shown as a percent of net assets. These industry classifications are unaudited. o Financial futures contracts purchased as of December 31, 2006 were as follows: --------------------------------------------------------------------------------------------- Number of Expiration Unrealized Contracts Issue Date Face Value Depreciation --------------------------------------------------------------------------------------------- 22 S&P 400 Midcap Index March 2007 $9,057,619 ($133,319) --------------------------------------------------------------------------------------------- See Notes to Financial Statements. 16 Master Mid Cap Index Series STATEMENT OF ASSETS AND LIABILITIES As of December 31, 2006 - ------------------------------------------------------------------------------------------------------------------------------------ Assets: Investments in unaffiliated securities, at value (including securities loaned of $1,367,900) (identified cost - $78,584,159) ............. $111,241,334 Investments in affiliated securities, at value ............................... 10,434,437 (identified cost - $10,434,437) Receivables: Contributions ....................................................... $ 487,347 Dividends ........................................................... 76,073 Securities sold ..................................................... 54,840 Securities lending .................................................. 357 618,617 ------------ Prepaid expenses and other assets ............................................ 5,251 ------------ Total assets ................................................................. 122,299,639 ------------ - ------------------------------------------------------------------------------------------------------------------------------------ Liabilities: Collateral on securities loaned, at value .................................... 1,428,500 Payables: Withdrawals ......................................................... 238,026 Securities purchased ................................................ 194,616 Variation margin .................................................... 60,604 Other affiliates .................................................... 1,133 Investment adviser .................................................. 958 495,337 ------------ Accrued expenses ............................................................. 11,280 ------------ Total liabilities ............................................................ 1,935,117 ------------ - ------------------------------------------------------------------------------------------------------------------------------------ Net Assets: Net assets ................................................................... $120,364,522 ============ - ------------------------------------------------------------------------------------------------------------------------------------ Net Assets Investors' capital ........................................................... $ 87,840,666 Consist of: Unrealized appreciation-net .................................................. 32,523,856 ------------ Net assets ................................................................... $120,364,522 ============ See Notes to Financial Statements. 17 Master Mid Cap Index Series STATEMENT OF OPERATIONS For the Year Ended December 31, 2006 - ----------------------------------------------------------------------------------------------------------------------------------- Investment Dividends ............................................................... $ 1,487,307 Income: Interest from affiliates ................................................ 646,091 Securities lending-net .................................................. 7,662 ------------ Total income ............................................................ 2,141,060 ------------ - ----------------------------------------------------------------------------------------------------------------------------------- Expenses: Professional fees ....................................................... $ 40,788 Accounting services ..................................................... 24,227 Custodian fees .......................................................... 13,746 Investment advisory fees ................................................ 12,598 Licensing fees .......................................................... 10,000 Printing and shareholder reports ........................................ 4,800 Trustees' fees and expenses ............................................. 2,632 Other ................................................................... 6,993 ------------ Total expenses .......................................................... 115,784 ------------ Investment income-net ................................................... 2,025,276 ------------ - ----------------------------------------------------------------------------------------------------------------------------------- Realized & Unrealized Realized gain on: Gain (Loss) - Net: Investments-net .................................................... 15,624,199 Financial futures contracts-net .................................... 642,761 16,266,960 ------------ Change in unrealized appreciation/depreciation on: Investments-net .................................................... (4,815,277) Financial futures contracts-net .................................... 44,620 (4,770,657) ------------ ------------ Total realized and unrealized gain-net .................................. 11,496,303 ------------ Net Increase in Net Assets Resulting from Operations .................... $ 13,521,579 ============ See Notes to Financial Statements. 18 Master Mid Cap Index Series STATEMENTS OF CHANGES IN NET ASSETS For the Year Ended December 31, ----------------------------- Increase (Decrease) in Net Assets: 2006 2005 - ----------------------------------------------------------------------------------------------------------------------------------- Operations: Investment income-net ......................................................... $ 2,025,276 $ 2,460,156 Realized gain-net ............................................................. 16,266,960 12,714,786 Change in unrealized appreciation/depreciation-net ............................ (4,770,657) 4,173,899 ------------- ------------- Net increase in net assets resulting from operations .......................... 13,521,579 19,348,841 ------------- ------------- - ----------------------------------------------------------------------------------------------------------------------------------- Capital Proceeds from contributions ................................................... 114,776,687 56,288,460 Transactions: Fair value of withdrawals ..................................................... (158,466,451) (104,393,473) ------------- ------------- Net decrease in net assets derived from capital transactions .................. (43,689,764) (48,105,013) ------------- ------------- - ----------------------------------------------------------------------------------------------------------------------------------- Net Assets: Total decrease in net assets .................................................. (30,168,185) (28,756,172) Beginning of year ............................................................. 150,532,707 179,288,879 ------------- ------------- End of year ................................................................... $ 120,364,522 $ 150,532,707 ============= ============= See Notes to Financial Statements. 19 Master Mid Cap Index Series FINANCIAL HIGHLIGHTS The following ratios have For the Year Ended December 31, been derived from information provided ------------------------------------------------------------- in the financial statements. 2006 2005 2004 2003 2002 - ------------------------------------------------------------------------------------------- ----------------------------------- Total Investment 10.30% 12.56% 16.41% 35.53% (14.80%) Return: ======== ======== ======== ======== ======== - ------------------------------------------------------------------------------------------- ----------------------------------- Ratios to Expenses, net of reimbursement ................ .09% .08% .09% .17% .08% Average Net ======== ======== ======== ======== ======== Assets: Expenses ...................................... .09% .08% .09% .17% .38% ======== ======== ======== ======== ======== Investment income-net ......................... 1.61% 1.50% 1.12% 1.06% 1.06% ======== ======== ======== ======== ======== - ------------------------------------------------------------------------------------------- ----------------------------------- Supplemental Net assets, end of year (in thousands) ........ $120,365 $150,533 $179,289 $ 83,858 $ 35,981 Data: ======== ======== ======== ======== ======== Portfolio turnover ............................ 27.54% 23.06% 17.25% 8.25% 42.18% ======== ======== ======== ======== ======== See Notes to Financial Statements. 20 Master Mid Cap Index Series NOTES TO FINANCIAL STATEMENTS 1. Significant Accounting Policies: Master Mid Cap Index Series (the "Series"), a non-diversified investment company, is part of Quantitative Master Series Trust (the "Trust"). The Trust is registered under the Investment Company Act of 1940, as amended, and is organized as a Delaware statutory trust. The Declaration of Trust permits the Trustees to issue nontransferable interests in the Series, subject to certain limitations. The Series' financial statements are prepared in conformity with U.S. generally accepted accounting principles, which may require the use of management accruals and estimates. Actual results may differ from these estimates. The following is a summary of significant accounting policies followed by the Series. (a) Valuation of investments - Equity securities held by the Series that are traded on stock exchanges or the NASDAQ Global Market are valued at the last sale price or official close price on the exchange, as of the close of business on the day the securities are being valued or, lacking any sales, at the last available bid price for long positions, and at the last available asked price for short positions. In cases where equity securities are traded on more than one exchange, the securities are valued on the exchange designated as the primary market by or under the authority of the Board of Trustees of the Trust. Long positions traded in the over-the-counter ("OTC") markets, NASDAQ Capital Market or Bulletin Board are valued at the last available bid price or yield equivalent obtained from one or more dealers or pricing services approved by the Board of Trustees of the Trust. Short positions traded in the OTC markets are valued at the last available asked price. Series securities that are traded both in the OTC markets and on a stock exchange are valued according to the broadest and most representative market. Options written or purchased are valued at the last sale price in the case of exchange-traded options. Options traded in the OTC market are valued at the last asked price (options written) or the last bid price (options purchased). Swap agreements are valued based upon quoted fair valuations received daily by the Series from a pricing service or counterparty. Financial futures contracts and options thereon, which are traded on exchanges, are valued at their last sale price as of the close of such exchanges. Obligations with remaining maturities of 60 days or less are valued at amortized cost unless BlackRock Advisors, LLC (the "Manager"), an indirect, wholly owned subsidiary of BlackRock, Inc., believes that this method no longer produces fair valuations. Valuation of other short-term investment vehicles is generally based on the net asset value of the underlying investment vehicle or amortized cost. Repurchase agreements are valued at cost plus accrued interest. The Series employs pricing services to provide certain securities prices for the Series. Securities and assets for which market quotations are not readily available are valued at fair value as determined in good faith by or under the direction of the Board of Trustees of the Trust, including valuations furnished by the pricing services retained by the Series, which may use a matrix system for valuations. The procedures of a pricing service and its valuations are reviewed by the officers of the Trust under the general supervision of the Board of Trustees. Such valuations and procedures will be reviewed periodically by the Board of Trustees of the Trust. Generally, trading in foreign securities, as well as U.S. government securities, money market instruments and certain fixed income securities is substantially completed each day at various times prior to the close of business on the New York Stock Exchange ("NYSE"). The values of such securities used in computing the net assets of the Series are determined as of such times. Foreign currency exchange rates will generally be determined as of the close of business on the NYSE. Occasionally, events affecting the values of such securities and such 21 exchange rates may occur between the times at which they are determined and the close of business on the NYSE that may not be reflected in the computation of the Series' net assets. If events (for example, a company announcement, market volatility or a natural disaster) occur during such periods that are expected to materially affect the value of such securities, those securities will be valued at their fair value as determined in good faith by the Board of Trustees or by the Manager using a pricing service and/or procedures approved by the Board of Trustees. (b) Derivative financial instruments - The Series may engage in various portfolio investment strategies both to increase the return of the Series and to hedge, or protect, its exposure to interest rate movements and movements in the securities markets. Losses may arise due to changes in the value of the contract or if the counterparty does not perform under the contract. o Financial futures contracts - The Series may purchase or sell financial futures contracts and options on such financial futures contracts. Financial futures contracts are contracts for delayed delivery of securities at a specific future date and at a specific price or yield. Upon entering into a contract, the Series deposits and maintains as collateral such initial margin as required by the exchange on which the transaction is effected. Pursuant to the contract, the Series agrees to receive from or pay to the broker an amount of cash equal to the daily fluctuation in value of the contract. Such receipts or payments are known as variation margin and are recorded by the Series as unrealized gains or losses. When the contract is closed, the Series records a realized gain or loss equal to the difference between the value of the contract at the time it was opened and the value at the time it was closed. o Options - The Series may purchase and write call and put options. When the Series writes an option, an amount equal to the premium received by the Series is reflected as an asset and an equivalent liability. The amount of the liability is subsequently marked-to-market to reflect the current market value of the option written. When a security is purchased or sold through an exercise of an option, the related premium paid (or received) is added to (or deducted from) the basis of the security acquired or deducted from (or added to) the proceeds of the security sold. When an option expires (or the Series enters into a closing transaction), the Series realizes a gain or loss on the option to the extent of the premiums received or paid (or a gain or loss to the extent that the cost of the closing transaction exceeds the premium paid or received). Written and purchased options are non-income producing investments. (c) Income taxes - The Series is classified as a partnership for federal income tax purposes. As such, each investor in the Series is treated as owner of its proportionate share of the net assets, income, expenses and realized and unrealized gains and losses of the Series. Therefore, no federal income tax provision is required. It is intended that the Series' assets will be managed so an investor in the Series can satisfy the requirements of Subchapter M of the Internal Revenue Code. (d) Security transactions and investment income - Security transactions are accounted for on the date the securities are purchased or sold (the trade dates). Realized gains and losses on security transactions are determined on the identified cost basis. Dividend income is recorded on the ex-dividend dates. Interest income is recognized on the accrual basis. (e) Securities lending - The Series may lend securities to financial institutions that provide cash or securities issued or guaranteed by the U.S. government as collateral, which will be maintained at all times in an amount equal to at least 100% of the current market value of the loaned securities. The market value of the loaned securities is determined at the close of business of the Series and any additional required collateral is delivered to the Series on the next business day. Where the Series receives securities as collateral for the loaned 22 securities, it collects a fee from the borrower. The Series typically receives the income on the loaned securities but does not receive the income on the collateral. Where the Series receives cash collateral, it may invest such collateral and retain the amount earned on such investment, net of any amount rebated to the borrower. Loans of securities are terminable at any time and the borrower, after notice, is required to return borrowed securities within five business days. The Series may pay reasonable finder's, lending agent, administrative and custodial fees in connection with its loans. In the event that the borrower defaults on its obligation to return borrowed securities because of insolvency or for any other reason, the Series could experience delays and costs in gaining access to the collateral. The Series also could suffer a loss where the value of the collateral falls below the market value of the borrowed securities, in the event of borrower default or in the event of losses on investments made with cash collateral. (f) Recent accounting pronouncements - In July 2006, the Financial Accounting Standards Board ("FASB") issued Interpretation No. 48 ("FIN 48"), "Accounting for Uncertainty in Income Taxes - an interpretation of FASB Statement No. 109." FIN 48 prescribes the minimum recognition threshold a tax position must meet in connection with accounting for uncertainties in income tax positions taken or expected to be taken by an entity including mutual funds before being measured and recognized in the financial statements. Adoption of FIN 48 is required for the last net asset value calculation in the first required financial statement reporting period for fiscal years beginning after December 15, 2006. The impact on the Series' financial statements, if any, is currently being assessed. In addition, in September 2006, Statement of Financial Accounting Standards No. 157, "Fair Value Measurements" ("FAS 157"), was issued and is effective for fiscal years beginning after November 15, 2007. FAS 157 defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. Management is currently evaluating the implications of FAS 157. At this time, its impact on the Series' financial statements has not been determined. 2. Investment Advisory Agreement and Transactions with Affiliates: On September 29, 2006, BlackRock, Inc. and Merrill Lynch & Co., Inc. ("Merrill Lynch") combined Merrill Lynch's investment management business, Merrill Lynch Investment Managers, L.P.("MLIM"),and its affiliates, including Fund Asset Management, L.P. ("FAM"), with BlackRock, Inc. to create a new independent company. Merrill Lynch has a 49.8% economic interest and a 45% voting interest in the combined company and The PNC Financial Services Group, Inc., has approximately a 34% economic and voting interest. The new company operates under the BlackRock name and is governed by a board of directors with a majority of independent members. On September 29, 2006, the investors in the Series approved a new Investment Advisory Agreement for the Series with the Manager. BlackRock Advisors, Inc. was recently reorganized into a limited liability company and renamed BlackRock Advisors, LLC. The new Investment Advisory Agreement between the Series and the Manager became effective on September 29, 2006. Prior to September 29, 2006, FAM was the Series' Manager. The general partner of MLIM is Princeton Services, Inc. ("PSI"), an indirect, wholly owned subsidiary of Merrill Lynch, which is the limited partner. The Manager is responsible for the management of the Series' portfolio and provides the necessary personnel, facilities, equipment and certain other services necessary to the operations of the Series. For such services, the Series pays a monthly fee at an annual rate of .01% of the Series' average daily net assets. In addition, the Manager has entered into a sub-advisory agreement with BlackRock Investment Management, LLC ("BIM"), an affiliate of the Manager, under which the Manager pays the Sub-Adviser for services it provides a monthly fee that is a percentage of the management fee paid by the Series to the Manager. The Series has received an exemptive order from the Securities and Exchange Commission permitting it to lend portfolio securities to Merrill Lynch, Pierce, Fenner & Smith Incorporated ("MLPF&S"), an affiliate of Merrill Lynch, or its affiliates. Pursuant to that order, the Series also has retained BIM as the securities lending agent for a fee based on a share of the returns on investment of cash collateral. Prior to September 29, 2006, BIM was organized as Merrill Lynch Investment Managers, LLC ("MLIM, LLC"), an 23 affiliate of Merrill Lynch, and MLIM, LLC was the securities lending agent. BIM may, on behalf of the Series, invest cash collateral received by the Series for such loans, among other things, in a private investment company managed by the Manager or in registered money market funds advised by the Manager or its affiliates. For the year ended December 31, 2006, BIM received $3,254 in securities lending agent fees. In addition, MLPF&S received $2,406 in commissions on the execution of portfolio security transactions for the year ended December 31, 2006. For the year ended December 31, 2006, the Series reimbursed FAM and the Manager $2,089 and $552, respectively for certain accounting services. Prior to September 29, 2006, certain officers and/or trustees of the Series were officers and/or directors of FAM, PSI, ML & Co., Merrill Lynch, and/or MLIM, LLC. Commencing September 29, 2006, certain officers and/or trustees of the Series are officers and/or directors of BlackRock, Inc. or its affiliates. 3. Investments: Purchases and sales of investments, excluding short-term securities, for the year ended December 31, 2006 were $31,525,070 and $56,340,983, respectively. 4. Short-Term Borrowings: The Trust, on behalf of the Series, along with certain other Funds managed by FAM and its affiliates, is a party to a $500,000,000 credit agreement with a group of lenders. The Series may borrow under the credit agreement to fund Series shareholder redemptions and for other lawful purposes other than for leverage. The Series may borrow up to the maximum amount allowable under the Series' current prospectus and statement of additional information, subject to various other legal, regulatory or contractual limits. On November 22, 2006 the credit agreement was renewed for one year under substantially the same terms. The Series pays a commitment fee of .06% per annum based on the Series' pro rata share of the unused portion of the credit agreement. Amounts borrowed under the credit agreement bear interest at a rate equal to, at each Series' election, the federal funds rate plus .35% or a base rate as defined in the credit agreement. The Series did not borrow under the credit agreement during the year ended December 31, 2006. 24 REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM To the Investors and Board of Trustees of Quantitative Master Series Trust: We have audited the accompanying statement of assets and liabilities, including the schedule of investments, of Master Mid Cap Index Series, one of the portfolios constituting the Quantitative Master Series Trust (the "Trust"), as of December 31, 2006, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, and the financial highlights for each of the five years in the period then ended. These financial statements and financial highlights are the responsibility of the Trust's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. The Trust is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Trust's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of December 31, 2006, by correspondence with the custodian and brokers; where replies were not received from brokers, we performed other auditing procedures. We believe that our audits provide a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of Master Mid Cap Index Series of the Quantitative Master Series Trust as of December 31, 2006, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and its financial highlights for each of the five years in the period then ended, in conformity with accounting principles generally accepted in the United States of America. Deloitte & Touche LLP Princeton, New Jersey February 26, 2007 25 QUANTITATIVE MASTER SERIES TRUST Master MidCap Index Series BlackRock Investment Advisory Agreement - Matters Considered by the Board The following disclosure appeared in the June 30, 2006 Semi-Annual Report of the Series and is the discussion referred to in "New BlackRock Sub-Advisory Agreement - Matters Considered by the Board" below. The term "Investment Adviser" as used herein refers to Fund Asset Management, L.P. Disclosure of Investment Advisory Agreement Activities and Composition of the Board of Trustees All but one member of the Board of Trustees is an independent trustee whose only affiliation with Fund Asset Management, L.P. (the "Investment Adviser") or other Merrill Lynch affiliates is as a trustee of the Trust and as a trustee or director of certain other funds advised by the Investment Adviser or its affiliates. The Chairman is an independent trustee. New trustee nominees are chosen by a Nominating Committee comprised entirely of independent trustees. All independent trustees also are members of the Board's Audit Committee, and the independent trustees meet in executive session at each in-person Board meeting. The Board and the Audit Committee meet in person for at least two days each quarter and conduct other in-person and telephone meetings throughout the year, some of which are formal Board meetings and some of which are informational meetings. Independent counsel to the independent trustees attends all in-person Board and Audit Committee meetings and other meetings at the independent trustees' request. Investment Advisory Agreements - Matters Considered by the Board Every year, the Board considers approval of the Trust's investment advisory agreement on behalf of the Series (the "Investment Advisory Agreement"). The Board assesses the nature, scope and quality of the services provided to the Series and the Trust by the personnel of the Investment Adviser and its affiliates, including administrative services, shareholder services, oversight of fund accounting, marketing services and assistance in meeting legal and regulatory requirements. The Board also receives and assesses information regarding the services provided to the Series and the Trust by certain unaffiliated service providers. At various times throughout the year, the Board also considers a range of information in connection with its oversight of the services provided by the Investment Adviser and its affiliates. Among the matters considered are: (a) fees (in addition to management fees) paid to the Investment Adviser and its affiliates by the Series and/or the Trust, such as transfer agency fees and fees for marketing and distribution; (b) Series/Trust operating expenses paid to third parties; (c) the resources devoted to and compliance reports relating to the Series' investment objective, policies and restrictions, and the Series'/Trust's compliance with its Code of Ethics and compliance policies and procedures; and (d) the nature, cost and character of non-investment management services provided by the Investment Adviser and its affiliates. The Board believes that the Investment Adviser is one of the most experienced global asset management firms and considers the overall services provided by the Investment Adviser to be of high quality. The Board also believes that the Investment Adviser is financially sound and well managed and notes that the Investment Adviser is affiliated with one of America's largest financial firms. The Board works closely with the Investment Adviser in overseeing the Investment Adviser's efforts to achieve good performance. As part of this effort, the Board discusses portfolio manager effectiveness and, when performance is not satisfactory, discusses with the Investment Adviser taking steps such as changing investment personnel. Annual Consideration of Approval by the Boards In the period prior to the Board meeting to consider renewal of the Investment Advisory Agreement, the Board requests and receives materials specifically relating to the Investment Advisory Agreement. These materials include (a) information on the fees and expenses and the investment performance of the Series; (b) sales and redemption data for the Series; (c) a discussion by the Series' 26 portfolio management team of investment strategies used by the Series during its most recent fiscal year; (d) information on the profitability to the Investment Adviser and its affiliates of the Investment Advisory Agreement and other relationships with the Series and the Trust; and (e) information provided by the Investment Adviser concerning investment advisory fees charged to other clients, such as collective investment trusts, under similar investment mandates. The Board noted that the Investment Adviser had informed the Board that no information compiled by Lipper Inc. ("Lipper") was provided in connection with the Series because retail data provided by Lipper is not comparable to the Series, which is sold only in private placements. The Board also considers other matters it deems important to the approval process, such as payments made to the Investment Adviser or its affiliates relating to the distribution of Series shares, services related to the valuation and pricing of Series portfolio holdings, the Series' portfolio turnover statistics, and direct and indirect benefits to the Investment Adviser and its affiliates from their relationship with the Series and the Trust. The Board did not identify any particular information as controlling, and each member of the Board attributed different weights to the various items considered. Certain Specific Renewal Data In connection with the most recent renewal of the Trust's Investment Advisory Agreement on behalf of the Series in June 2006, the independent trustees' and Board's review included the following: Services Provided by the Investment Adviser. The Board reviewed the nature, extent and quality of services provided by the Investment Adviser, including the investment advisory services and the resulting performance of the Series. The Board focused primarily on the Investment Adviser's investment advisory services and the Series' investment performance. The Board compared Series performance - both including and excluding the effects of the Series' fees and expenses - to the performance of a relevant index. While the Board reviews performance data at least quarterly, consistent with the Investment Adviser's investment goals, the Board attaches more importance to performance over relatively long periods of time, typically three to five years. The Board concluded that the Series' performance was consistent with the Series' investment objective and its benchmark index. Considering these factors, the Board concluded that the nature and quality of the services provided and the Series' performance supported the continuation of the Investment Advisory Agreement. The Investment Adviser's Personnel and Investment Process. The Board reviews at least annually the Series' investment objectives and strategies. The Board discusses with senior management of the Investment Adviser responsible for investment operations and the senior management of the Investment Adviser's equity investing group the strategies being used to achieve the stated objectives. Among other things, the Board considers the size, education and experience of the Investment Adviser's investment staff, its use of technology, and the Investment Adviser's approach to training and retaining portfolio managers and other research, advisory and management personnel. The Board also reviews the Investment Adviser's compensation policies and practices with respect to the Series' portfolio managers. The Board also considered the experience of the Series' investment management team and noted that each of the Series' co-portfolio managers, Messrs. Leon Roisenberg and Jeffrey Russo, has extensive experience in analyzing and managing the types of investments used by the Series. The Board concluded that the Series benefits from that expertise. Management Fees and Other Expenses. The Board reviewed the Series' management fee rate and total expenses. The Board noted that the Series' fees reflect that the shares are available only to a limited number of institutional investors, including investment companies, common or commingled trust Series, and certain other "accredited investors," and that as such, the fees are lower than fees charged to retail mutual funds. The Board concluded that the Series' management fee rate and overall expense ratio are reasonable. Profitability. The Board considers the cost of the services provided to the Series by the Investment Adviser and the Investment Adviser's and its affiliates' profits relating to the management and distribution of the Series and the MLIM/FAM-advised funds. As part of its analysis, the Board reviewed the Investment Adviser's methodology in allocating its costs to the management of the Series and concluded that there was a reasonable basis for the allocation. The Board concluded that the profits of the Investment Adviser and its 27 affiliates are reasonable in relation to the nature and quality of services provided and given the level of fees and expenses overall. Economies of Scale. The Board noted that although the assets of the Trust and the Series have not increased sufficiently to provide economies of scale, the management fee rate reflects the economies of scale realized based on the institutional nature of the Trust's shareholder base. The Board determined that the management fee structure was reasonable and that no changes were currently necessary. Conclusion After the independent trustees deliberated in executive session, the entire Board, including all of the independent trustees, approved the renewal of the existing Investment Advisory Agreement, concluding that the advisory fees were reasonable in relation to the services provided and that a contract renewal was in the best interests of the shareholders New BlackRock Sub-Advisory Agreement - Matters Considered by the Board At an in-person meeting held on August 16-17, 2006, the Board of Trustees, including the independent trustees, discussed and approved the sub-advisory agreement with respect to the Series between BlackRock Advisors, LLC (previously organized as BlackRock Advisors, Inc.) ("BlackRock Advisors") and BlackRock Investment Management, LLC (the "Sub-Adviser") (the "BlackRock Sub-Advisory Agreement"). The BlackRock Sub-Advisory Agreement became effective on September 29, 2006, at the same time the New Investment Advisory Agreement with BlackRock Advisors (which had been approved by the Series' shareholders) became effective. Pursuant to the BlackRock Sub-Advisory Agreement, the Sub-Adviser receives a monthly fee from BlackRock Advisors at an annual rate equal to 74% of the advisory fee received by BlackRock Advisors from the Series. BlackRock Advisors pays the Sub-Adviser out of its own resources, and there is no increase in Series expenses as a result of the BlackRock Sub-Advisory Agreement. In approving the BlackRock Sub-Advisory Agreement at the August in-person meeting, the Board reviewed its considerations in connection with its approval of the New Investment Advisory Agreement in May 2006. The Board relied on the same information and considered the same factors as those discussed above in connection with the approval of the New Investment Advisory Agreement, and came to the same conclusions. In reviewing the sub-advisory fee rate provided for in the BlackRock Sub-Advisory Agreement, the Board noted the fact that both BlackRock Advisors and the Sub-Adviser have significant responsibilities under their respective advisory agreements. Under the New Investment Advisory Agreement, BlackRock Advisors remains responsible for the overall management of the Series and for oversight of the Series' operations and administration. Under the BlackRock Sub-Advisory Agreement, the Sub-Adviser provides advisory services to the Series and is responsible for the day-to-day management of the Series' portfolio. The Board also took into account the fact that there is no increase in total advisory fees paid by the Series as a result of the BlackRock Sub-Advisory Agreement. Based on its considerations, the Board concluded that it was a reasonable allocation of fees for the Sub-Adviser to receive a fee at an annual rate equal to 74% of the advisory fee paid by the Series to BlackRock Advisors. After the independent trustees deliberated in executive session, the entire Board, including the independent trustees, approved the BlackRock Sub-Advisory Agreement, concluding that the sub-advisory fee was reasonable in relation to the services provided and that the BlackRock Sub-Advisory Agreement was in the best interests of the Series' shareholders. 28 Officers and Trustees Number of Funds and Portfolios in Other Public Position(s) Length Fund Complex Directorships Held with Of Time Overseen by Held by Name Address & Age Trust Served Principal Occupation(s) During Past 5 Years Trustee Trustee ==================================================================================================================================== Interested Trustees - ------------------------------------------------------------------------------------------------------------------------------------ Robert C. P.O. Box 9011 President 2005 to Vice Chairman and Director of BlackRock, Inc., 122 Funds None Doll, Jr.* Princeton, NJ and present Global Chief Investment Officer for Equities, 168 Portfolios 08543-9011 Trustee Chairman of the BlackRock Retail Operating Age: 52 Committee, and member of the BlackRock Executive Committee since 2006; President of the funds advised by Merrill Lynch Investment Managers, L.P. ("MLIM") and its affiliates ("MLIM/FAM-advised funds") from 2005 to 2006 and Chief Investment Officer thereof from 2001 to 2006; President of MLIM and Fund Asset Management, L.P. ("FAM") from 2001 to 2006; Co-Head (Americas Region) thereof from 2000 to 2001 and Senior Vice President from 1999 to 2001; President and Director of Princeton Services, Inc. ("Princeton Services") and President of Princeton Administrators, L.P. ("Princeton Administrators") from 2001 to 2006; Chief Investment Officer of OppenheimerFunds, Inc. in 1999 and Executive Vice President thereof from 1991 to 1999. ------------------------------------------------------------------------------------------------------------------------ * Mr. Doll is a director, trustee or member of an advisory board of certain other investment companies for which BlackRock Advisors, LLC and its affiliates act as an investment adviser. Mr. Doll is an "interested person," as described in the Investment Company Act, of the Fund based on his positions with BlackRock, Inc. and its affiliates. Trustees serve until their resignation, removal or death, or until December 31 of the year in which they turn 72. As Trust President, Mr. Doll serves at the pleasure of the Board of Trustees. ==================================================================================================================================== Independent Trustees* - ------------------------------------------------------------------------------------------------------------------------------------ Donald W. P.O. Box 9095 Trustee 2002 to General Partner of The Burton Partnership, 21 Funds Knology, Burton Princeton, NJ present Limited partnership (an investment partnership) 38 Portfolios Inc., (tele- 08543-9095 since 1979; Managing General Partner of The South communica- Age: 62 Atlantic Venture Funds since 1983; Member of the tions); Investment Advisory Council of the Florida State Symbion, Inc. Board of Administration since 2001. (healthcare); Capital Southwest (financial) - ------------------------------------------------------------------------------------------------------------------------------------ John P.O. Box 9095 Trustee 2005 to President and Chief Executive Officer of 21 Funds Cabot Corpor- Francis Princeton, NJ present Allmerica Financial Corporation (financial 38 Portfolios ation O'Brien 08543-9095 services holding company) from 1995 to 2002 and (chemicals); Age: 63 Director from 1995 to 2003; President of LKQ Corpora- Allmerica Investment Management Co., Inc. tion (auto (investment adviser) from 1989 to 2002; Director parts manufa- from 1989 to 2002 and Chairman of the Board from cturing); TJX 1989 to 1990; President, Chief Executive Officer Companies, and Director of First Allmerica Financial Life Inc. Insurance Company from 1989 to 2002 and Director (retailer) of various other Allmerica Financial companies until 2002; Director from 1989 to 2006, Member of the Governance Nominating Committee from 2004 to 2006, Member of the Compensation Committee from 1989 to 2006 and Member of the Audit Committee from 1990 to 2004 of ABIOMED; Director, Member of the Governance and Nomination Committee and Member of the Audit Committee of Cabot Corporation since 1990; Director and Member of the Audit Committee and Compensation Committee of LKQ Corporation since 2003; Lead Director of TJX Companies, Inc. since 1996; Trustee of the Woods Hole Oceanographic Institute since 2003; Director, Ameresco, Inc. since 2006; Director, Boston Lyric Opera since 2002. - ------------------------------------------------------------------------------------------------------------------------------------ 29 Officers and Trustees (continued) Number of Funds and Portfolios in Other Public Position(s) Length Fund Complex Directorships Held with Of Time Overseen by Held by Name Address & Age Trust Served Principal Occupation(s) During Past 5 Years Trustee Trustee ==================================================================================================================================== Independent Trustees (concluded) - ------------------------------------------------------------------------------------------------------------------------------------ David H. P.O. Box 9095 Trustee 2003 to Director, Ruckleshaus Institute and Haub School 21 Funds None Walsh Princeton, NJ present of Natural Resources at the University of Wyoming 38 Portfolios 08543-9095 since 2006; Consultant with Putnam Investments Age: 65 from 1993 to 2003 and employed in various capacities therewith from 1973 to 1992; Director, Massachusetts Audubon Society from 1990 to 1997; Director, The National Audubon Society from 1998 to 2005; Director, The American Museum of Fly Fishing since 1997. - ------------------------------------------------------------------------------------------------------------------------------------ Fred G. P.O. Box 9095 Trustee 2000 to Managing Director of FGW Associates since 1997; 21 Funds Watson Weiss** Princeton, NJ present Vice President, Planning, Investment and 38 Portfolios Pharmaceu- 08543-9095 Development of Warner Lambert Co. from 1979 to ticals, Inc. Age: 65 1997; Director of the Michael J. Fox Foundation (pharmace- for Parkinson's Research since 2000; Director of utical BTG International, Plc (a global technology company) commercialization company) since 2001. - ------------------------------------------------------------------------------------------------------------------------------------ * Trustees serve until their resignation, removal or death, or until December 31 of the year in which they turn 72. ** Chairman of the Board of Trustees and the Audit Committee. ==================================================================================================================================== Trust Officers - ------------------------------------------------------------------------------------------------------------------------------------ Donald C. P.O. Box 9011 Vice 1997 to Managing Director of BlackRock, Inc. Burke Princeton, NJ President present since 2006; Managing Director of 08543-9011 and and 1999 Merrill Lynch Investment Managers, L.P. Age: 46 Treasurer to and Fund Asset Management, L.P. in present 2006; First Vice President of MLIM and FAM from 1997 to 2005 and Treasurer thereof from 1999 to 2006; Vice President of MLIM and FAM from 1990 to 1997. - ------------------------------------------------------------------------------------------------------------------------------------ Debra L. P.O. Box 9011 Vice 2005 to Director of BlackRock, Inc. since 2006; Jelilian Princeton, NJ President present Director of MLIM from 1999 to 2006. 08543-9011 Age: 39 - ------------------------------------------------------------------------------------------------------------------------------------ Jeffrey L. P.O. Box 9011 Vice 2005 to Director of BlackRock, Inc. since 2006; Russo Princeton, NJ President present Director of MLIM from 2004 to 2006; 08543-9011 Vice President of MLIM from 1994 to 2004. Age: 39 - ------------------------------------------------------------------------------------------------------------------------------------ Jeffrey P.O Box 9011 Fund Chief 2004 to Managing Director of BlackRock, Inc. and Fund Hiller Princeton, NJ Compliance present Chief Compliance Officer since 2006; Chief 08534 Officer Compliance Officer of the MLIM/FAM-advised funds Age: 55 and First Vice President and Chief Compliance Officer of MLIM (Americas Region) from 2004 to 2006; Chief Compliance Officer of the IQ Funds since 2004; Global Director of Compliance at Morgan Stanley Investment Management from 2002 to 2004; Managing Director and Global Director of Compliance at Citigroup Asset Management from 2000 to 2002; Chief Compliance Officer at Soros Fund Management in 2000; Chief Compliance Officer at Prudential Financial from 1995 to 2000; Senior Counsel in the Securities and Exchange Commission's Division of Enforcement in Washington, D.C. from 1990 to 1995. - ------------------------------------------------------------------------------------------------------------------------------------ 30 Officers and Trustees (concluded) Position(s) Length Held with Of Time Name Address & Age Trust Served Principal Occupation(s) During Past 5 Years ==================================================================================================================================== Trust Officers (concluded) - ------------------------------------------------------------------------------------------------------------------------------------ Alice A. P.O. Box 9011 Secretary 2004 to Director of BlackRock, Inc. since 2006; Director Pellegrino Princeton, NJ present (Legal Advisory) of MLIM from 2002 to 2006; Vice 08543-9011 President of MLIM from 1999 to 2002; Attorney Age: 46 associated with MLIM from 1997 to 2006; Secretary of MLIM, FAM, FAM Distributors, Inc. and Princeton Services from 2004 to 2006. - ------------------------------------------------------------------------------------------------------------------------------------ * Officers of the Trust serve at the pleasure of the Board of Trustees. Further information about the Trust's Officers and Trustees is available in the Trust's Statement of Additional Information, which can be obtained without charge by calling 1-800-441-7762. - ------------------------------------------------------------------------------------------------------------------------------------ Custodian JPMorgan Chase Bank 3 Chase MetroTech Center Brooklyn, NY 11245 Transfer Agent PFPC Inc. Wilmington, DE 19809 Availability of Quarterly Schedule of Investments The Series files its complete schedule of portfolio holdings with the Securities and Exchange Commission ("SEC") for the first and third quarters of each fiscal year on Form N-Q. The Series' Forms N-Q are available on the SEC's Web site at http://www.sec.gov. The Series' Forms N-Q may also be reviewed and copied at the SEC's Public Reference Room in Washington, DC. Information on the operation of the Public Reference Room may be obtained by calling 1-800-SEC-0330. - -------------------------------------------------------------------------------- A description of the policies and procedures that the Series uses to determine how to vote proxies relating to portfolio securities is available (1) without charge, upon request, by calling toll-free 1-800-441-7762; (2) at www.blackrock.com; and (3) on the Securities and Exchange Commission's Web site at http://www.sec.gov. Information about how the Series voted proxies relating to securities held in the Series' portfolio during the most recent 12-month period ended December 31st is available (1) at www.blackrock.com; and (2) on the Securities and Exchange Commission's Web site at http://www.sec.gov. - -------------------------------------------------------------------------------- 31 Proxy Results During the six-month period ended December 31, 2006, Master Mid Cap Index Series of Quantitative Master Series Trust's interest holders voted on the following proposals, which were approved at a special interest holders' meeting on September 29, 2006. A description of the proposals and number of units of interest voted are as follows: - ------------------------------------------------------------------------------------------------------------------------------ Units of Interest Units of Interest Units of Interest Voted For Voted Against Voted Abstain - ------------------------------------------------------------------------------------------------------------------------------ To approve a new investment advisory agreement with BlackRock Advisors, Inc. 116,764,404 72,599 40,657 - ------------------------------------------------------------------------------------------------------------------------------ To approve a contingent sub-advisory agreement with BlackRock Advisors, Inc. 116,759,028 78,345 40,288 - ------------------------------------------------------------------------------------------------------------------------------ 32 Item 2 - Code of Ethics - The registrant has adopted a code of ethics, as of the end of the period covered by this report, that applies to the registrant's principal executive officer, principal financial officer and principal accounting officer, or persons performing similar functions. A copy of the code of ethics is available without charge at www.blackrock.com. Item 3 - Audit Committee Financial Expert - The registrant's board of directors has determined that (i) the registrant has the following audit committee financial experts serving on its audit committee and (ii) each audit committee financial expert is independent: (1) Donald W. Burton, (2) Laurie Simon Hodrick (resigned as of May 1, 2006), (3) John F. O'Brien, (4) David H. Walsh and (5) Fred G. Weiss. The registrant's board of directors has determined that Laurie Simon Hodrick qualifies as a financial expert pursuant to Item 3(c)(4) of Form N-CSR. Ms. Hodrick has a thorough understanding of generally accepted accounting principals, financial statements, and internal controls and procedures for financial reporting. Ms. Hodrick earned a Ph.D. in economics and has taught courses in finance for over 15 years. Her M.B.A.-level course centers around the evaluation and analysis of firms' corporate financial statements. She has also taught in financial analysts' training programs. Ms. Hodrick has also worked with several prominent corporations in connection with the analysis of financial forecasts and projections and analysis of the financial statements of those companies, serving on the Financial Advisory Council of one of these major corporations. She has also served as the Treasurer and Finance Chair of a 501(c)(3) organization. Ms. Hodrick has published a number of articles in leading economic and financial journals and is the associate editor of two leading finance journals. Item 4 - Principal Accountant Fees and Services (a) Audit Fees - Fiscal Year Ending December 31, 2006 - $27,300 Fiscal Year Ending December 31, 2005 - $27,000 (b) Audit-Related Fees - Fiscal Year Ending December 31, 2006 - $0 Fiscal Year Ending December 31, 2005 - $0 (c) Tax Fees - Fiscal Year Ending December 31, 2006 - $9,200 Fiscal Year Ending December 31, 2005 - $8,700 The nature of the services include tax compliance, tax advice and tax planning. (d) All Other Fees - Fiscal Year Ending December 31, 2006 - $0 Fiscal Year Ending December 31, 2005 - $0 (e)(1) The registrant's audit committee (the "Committee") has adopted policies and procedures with regard to the pre-approval of services. Audit, audit-related and tax compliance services provided to the registrant on an annual basis require specific pre-approval by the Committee. The Committee also must approve other non-audit services provided to the registrant and those non-audit services provided to the registrant's affiliated service providers that relate directly to the operations and the financial reporting of the registrant. Certain of these non-audit services that the Committee believes are a) consistent with the SEC's auditor independence rules and b) routine and recurring services that will not impair the independence of the independent accountants may be approved by the Committee without consideration on a specific case-by-case basis ("general pre-approval"). However, such services will only be deemed pre-approved provided that any individual project does not exceed $5,000 attributable to the registrant or $50,000 for all of the registrants the Committee oversees. Any proposed services exceeding the pre-approved cost levels will require specific pre-approval by the Committee, as will any other services not subject to general pre-approval (e.g., unanticipated but permissible services). The Committee is informed of each service approved subject to general pre-approval at the next regularly scheduled in-person board meeting. (e)(2) 0% (f) Not Applicable (g) Fiscal Year Ending December 31, 2006 - $3,071,450 Fiscal Year Ending December 31, 2005 - $5,577,771 (h) The registrant's audit committee has considered and determined that the provision of non-audit services that were rendered to the registrant's investment adviser and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant that were not pre-approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. Regulation S-X Rule 2-01(c)(7)(ii) - $1,739,500, 0% Item 5 - Audit Committee of Listed Registrants - Not Applicable Item 6 - Schedule of Investments - Not Applicable Item 7 - Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies - Not Applicable Item 8 - Portfolio Managers of Closed-End Management Investment Companies - Not Applicable Item 9 - Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers - Not Applicable Item 10 - Submission of Matters to a Vote of Security Holders - Not Applicable Item 11 - Controls and Procedures 11(a) - The registrant's certifying officers have reasonably designed such disclosure controls and procedures to ensure material information relating to the registrant is made known to us by others particularly during the period in which this report is being prepared. The registrant's certifying officers have determined that the registrant's disclosure controls and procedures are effective based on our evaluation of these controls and procedures as of a date within 90 days prior to the filing date of this report. 11(b) - As of September 29, 2006, with the conclusion of the combination of Merrill Lynch's asset management business with BlackRock, the registrant was migrated to BlackRock's trading and compliance monitoring systems, and various personnel changes occurred. In conjunction with these business improvements, there were no changes in the registrants internal control over financial reporting (as defined in Rule 30a-3(d) under Act (17 CFR 270.30a-3(d)) that occurred during the last fiscal half-year of the period covered by this report that has materially affected, or is reasonably likely to affect, the registrant's internal control over financial reporting. Item 12 - Exhibits attached hereto 12(a)(1) - Code of Ethics - See Item 2 12(a)(2) - Certifications - Attached hereto 12(a)(3) - Not Applicable 12(b) - Certifications - Attached hereto Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. Master Mid Cap Index Series of Quantitative Master Series Trust By: /s/ Robert C. Doll, Jr. ------------------------------- Robert C. Doll, Jr., Chief Executive Officer of Master Mid Cap Index Series of Quantitative Master Series Trust Date: February 20, 2007 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By: /s/ Robert C. Doll, Jr. ------------------------------- Robert C. Doll, Jr., Chief Executive Officer of Master Mid Cap Index Series of Quantitative Master Series Trust Date: February 20, 2007 By: /s/ Donald C. Burke ------------------------------- Donald C. Burke, Chief Financial Officer of Master Mid Cap Index Series of Quantitative Master Series Trust Date: February 20, 2007