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SIGNATURE DOUGLAS A. ROMICH
TITLE ASSISTANT TREASURER
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
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[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000918572
<NAME> STATE STREET RESEARCH SECURITIES TRUST
<SERIES>
<NUMBER> 022
<NAME> STATE STREET RESEARCH STRATEGIC INCOME FUND CLASS B
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[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000918572
<NAME> STATE STREET RESEARCH SECURITIES TRUST
<SERIES>
<NUMBER> 023
<NAME> STATE STREET RESEARCH STRATEGIC INCOME FUND CLASS S
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[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000918572
<NAME> STATE STREET RESEARCH SECURITIES TRUST
<SERIES>
<NUMBER> 024
<NAME> STATE STREET RESEARCH STRATEGIC INCOME FUND CLASS C
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[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000918572
<NAME> STATE STREET RESEARCH SECURITIES TRUST
<SERIES>
<NUMBER> 025
<NAME> STATE STREET RESEARCH STRATEGIC INCOME FUND CLASS B(1)
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[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000918572
<NAME> STATE STREET RESEARCH SECURITIES TRUST
<SERIES>
<NUMBER> 031
<NAME> STATE STREET RESEARCH GALILEO FUND CLASS A
<S> <C>
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[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000918572
<NAME> STATE STREET RESEARCH SECURITIES TRUST
<SERIES>
<NUMBER> 032
<NAME> STATE STREET RESEARCH GALILEO FUND CLASS B
<S> <C>
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<NET-CHANGE-IN-ASSETS> 29,671,551
<ACCUMULATED-NII-PRIOR> 9,454
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[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000918572
<NAME> STATE STREET RESEARCH SECURITIES TRUST
<SERIES>
<NUMBER> 033
<NAME> STATE STREET RESEARCH GALILEO FUND CLASS S
<S> <C>
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<EXPENSE-RATIO> 1.02
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000918572
<NAME> STATE STREET RESEARCH SECURITIES TRUST
<SERIES>
<NUMBER> 034
<NAME> STATE STREET RESEARCH GALILEO FUND CLASS C
<S> <C>
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<FISCAL-YEAR-END> APR-30-1999
<PERIOD-END> APR-30-1999
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<NUMBER-OF-SHARES-SOLD> 251,953
<NUMBER-OF-SHARES-REDEEMED> (43,795)
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<NET-CHANGE-IN-ASSETS> 29,671,551
<ACCUMULATED-NII-PRIOR> 9,454
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<GROSS-ADVISORY-FEES> 229,514
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 835,661
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<PER-SHARE-NAV-BEGIN> 9.91
<PER-SHARE-NII> (0.09)
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<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.63
<EXPENSE-RATIO> 2.02
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000918572
<NAME> STATE STREET RESEARCH SECURITIES TRUST
<SERIES>
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<NAME> STATE STREET RESEARCH GALILEO FUND CLASS B(1)
<S> <C>
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<NUMBER-OF-SHARES-REDEEMED> (2,833)
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<ACCUMULATED-NII-PRIOR> 9,454
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<PER-SHARE-NAV-BEGIN> 10.63
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<PER-SHARE-NAV-END> 11.63
<EXPENSE-RATIO> 2.02
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000918572
<NAME> STATE STREET RESEARCH SECURITIES TRUST
<SERIES>
<NUMBER> 041
<NAME> STATE STREET RESEARCH LEGACY FUND CLASS A
<S> <C>
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[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000918572
<NAME> STATE STREET RESEARCH SECURITIES TRUST
<SERIES>
<NUMBER> 042
<NAME> STATE STREET RESEARCH LEGACY FUND CLASS B
<S> <C>
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[AVG-DEBT-OUTSTANDING] 0
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</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000918572
<NAME> STATE STREET RESEARCH SECURITIES TRUST
<SERIES>
<NUMBER> 043
<NAME> STATE STREET RESEARCH LEGACY FUND CLASS S
<S> <C>
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<FISCAL-YEAR-END> APR-30-1999
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<INVESTMENTS-AT-COST> 170,590,529
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[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000918572
<NAME> STATE STREET RESEARCH SECURITIES TRUST
<SERIES>
<NUMBER> 044
<NAME> STATE STREET RESEARCH LEGACY FUND CLASS C
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> APR-30-1999
<PERIOD-END> APR-30-1999
<INVESTMENTS-AT-COST> 170,590,529
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<EXPENSE-RATIO> 1.95
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000918572
<NAME> STATE STREET RESEARCH SECURITIES TRUST
<SERIES>
<NUMBER> 045
<NAME> STATE STREET RESEARCH LEGACY FUND CLASS B1
<S> <C>
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<FISCAL-YEAR-END> APR-30-1999
<PERIOD-END> APR-30-1999
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<DIVIDEND-INCOME> 869,863
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<EXPENSES-NET> 1,751,463
<NET-INVESTMENT-INCOME> (665,565)
<REALIZED-GAINS-CURRENT> (353,576)
<APPREC-INCREASE-CURRENT> 28,621,415
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<NUMBER-OF-SHARES-SOLD> 1,782,571
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<NET-CHANGE-IN-ASSETS> 163,469,170
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 57,450
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<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 675,883
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,794,561
<AVERAGE-NET-ASSETS> 103,982,000
<PER-SHARE-NAV-BEGIN> 13.08
<PER-SHARE-NII> (0.04)
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<PER-SHARE-NAV-END> 14.28
<EXPENSE-RATIO> 1.88
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>
