<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0001025836
<NAME> QUANTITATIVE MASTER SERIES TRUST
<SERIES>
<NUMBER> 010
<NAME> MASTER S&P 500 INDEX SERIES
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> JUN-30-2000
<INVESTMENTS-AT-COST> 1288828887
<INVESTMENTS-AT-VALUE> 1761299330
<RECEIVABLES> 19870447
<ASSETS-OTHER> 1566617
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1782736394
<PAYABLE-FOR-SECURITIES> 9959521
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 12872460
<TOTAL-LIABILITIES> 22831981
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1287515620
<SHARES-COMMON-STOCK> 0
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 472388793
<NET-ASSETS> 1759904413
<DIVIDEND-INCOME> 9631310
<INTEREST-INCOME> 890182
<OTHER-INCOME> 37044
<EXPENSES-NET> (353659)
<NET-INVESTMENT-INCOME> 10204877
<REALIZED-GAINS-CURRENT> (14313621)
<APPREC-INCREASE-CURRENT> (1141629)
<NET-CHANGE-FROM-OPS> (5250373)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 0
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 69568675
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 42504
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 353659
<AVERAGE-NET-ASSETS> 1709739918
<PER-SHARE-NAV-BEGIN> 0
<PER-SHARE-NII> 0
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 0
<EXPENSE-RATIO> .04
</TABLE>
