<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000772034
<NAME> MASRKET STREET FUND, INC.
<SERIES>
<NUMBER> 05
<NAME> AGGRESSIVE GROWTH PORTFOLIO
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> JUN-30-2000
<INVESTMENTS-AT-COST> 67223932
<INVESTMENTS-AT-VALUE> 77535795
<RECEIVABLES> 1105365
<ASSETS-OTHER> 1
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 78641161
<PAYABLE-FOR-SECURITIES> 959620
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 220219
<TOTAL-LIABILITIES> 1176838
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 54891916
<SHARES-COMMON-STOCK> 3199873
<SHARES-COMMON-PRIOR> 2845165
<ACCUMULATED-NII-CURRENT> 204044
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 12056500
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 10311863
<NET-ASSETS> 77464323
<DIVIDEND-INCOME> 217386
<INTEREST-INCOME> 172315
<OTHER-INCOME> 0
<EXPENSES-NET> (186657)
<NET-INVESTMENT-INCOME> 204044
<REALIZED-GAINS-CURRENT> 12056500
<APPREC-INCREASE-CURRENT> 770022
<NET-CHANGE-FROM-OPS> 13030566
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (325505)
<DISTRIBUTIONS-OF-GAINS> (5142813)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 8874569
<NUMBER-OF-SHARES-REDEEMED> (6953158)
<SHARES-REINVESTED> 5468318
<NET-CHANGE-IN-ASSETS> 14951977
<ACCUMULATED-NII-PRIOR> 325505
<ACCUMULATED-GAINS-PRIOR> 5142814
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 132776
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 185657
<AVERAGE-NET-ASSETS> 69003786
<PER-SHARE-NAV-BEGIN> 21.97
<PER-SHARE-NII> .06
<PER-SHARE-GAIN-APPREC> 4.10
<PER-SHARE-DIVIDEND> (.11)
<PER-SHARE-DISTRIBUTIONS> (1.81)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 24.21
<EXPENSE-RATIO> .54
</TABLE>
