<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL TRUST
<SERIES>
<NUMBER> 021
<NAME> STATE STREET RESEARCH EMERGING GROWTH FUND CLASS A
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> SEP-30-2000
<PERIOD-END> MAR-31-2000
<INVESTMENTS-AT-COST> 143,348,931
<INVESTMENTS-AT-VALUE> 179,895,217
<RECEIVABLES> 3,850,262
<ASSETS-OTHER> 28,260
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 183,773,739
<PAYABLE-FOR-SECURITIES> 1,654,656
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 8,296,502
<TOTAL-LIABILITIES> 9,951,158
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 108,626,575
<SHARES-COMMON-STOCK> 3,189,846
<SHARES-COMMON-PRIOR> 2,849,374
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 28,649,720
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 36,546,286
<NET-ASSETS> 173,822,581
<DIVIDEND-INCOME> 71,262
<INTEREST-INCOME> 88,417
<OTHER-INCOME> 0
<EXPENSES-NET> 1,195,448
<NET-INVESTMENT-INCOME> (1,035,769)
<REALIZED-GAINS-CURRENT> 39,700,297
<APPREC-INCREASE-CURRENT> 20,897,654
<NET-CHANGE-FROM-OPS> 59,562,182
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,278,530
<NUMBER-OF-SHARES-REDEEMED> (1,938,058)
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 81,317,584
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 11,050,577
<GROSS-ADVISORY-FEES> 504,933
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,374,582
<AVERAGE-NET-ASSETS> 134,648,800
<PER-SHARE-NAV-BEGIN> 11.01
<PER-SHARE-NII> (0.09)
<PER-SHARE-GAIN-APPREC> 7.35
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 18.27
<EXPENSE-RATIO> 1.36
</TABLE>