STATE STREET RESEARCH CAPITAL TRUST
NSAR-A, 1998-05-29
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<PAGE>      PAGE  1
000 A000000 03/31/98
000 C000000 0000727101
000 D000000 N
000 E000000 F
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0
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001 A000000 STATE STREET RESEARCH CAPITAL TRUST
001 B000000 811-3838
001 C000000 6173571200
002 A000000 ONE FINANCIAL CENTER
002 B000000 BOSTON
002 C000000 MA
002 D010000 02111
002 D020000 2690
003  000000 N
004  000000 N
005  000000 N
006  000000 N
007 A000000 Y
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007 C020100 STATE STREET RESEARCH CAPITAL FUND
007 C030100 N
007 C010200  2
007 C020200 STATE STREET RESEARCH EMERGING GROWTH FUND
007 C030200 N
007 C010300  3
007 C020300 STATE STREET RESEARCH AURORA FUND
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020 A000001 CS FIRST BOSTON CORP.
020 B000001 13-5659485
020 C000001    109
020 A000002 LEWCO SECURITIES CORP.
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020 C000002    100
020 A000003 BEAR STEARNS & CO. INC.
020 B000003 13-3299429
<PAGE>      PAGE  2
020 C000003     96
020 A000004 GOLDMAN SACHS & CO.
020 B000004 13-5108880
020 C000004     89
020 A000005 MERRILL LYNCH PIERCE, FENNER & SMITH INC
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020 C000005     87
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020 A000007 SANFORD C. BERNSTEIN & CO.
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020 C000007     71
020 A000008 MORGAN STANLEY & CO.
020 B000008 13-2655998
020 C000008     68
020 A000009 MONTGOMERY SECURITIES
020 B000009 94-1701676
020 C000009     49
020 A000010 BT ALEX BROWN INC.
020 B000010 52-1319768
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021  000000     1725
022 A000001 FORD MOTOR CREDIT CO.
022 C000001    505416
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022 C000002    372136
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022 A000005 CHEVRON OIL FINANCE CO.
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022 A000006 HOUSEHOLD FINANCE CORP.
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<PAGE>      PAGE  3
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SIGNATURE   DOUGLAS A. ROMICH                            
TITLE       TREASURER           
 


<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL TRUST
<SERIES>
   <NUMBER> 011
   <NAME> STATE STREET RESEARCH CAPITAL FUND CLASS A
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
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<PERIOD-END>                               MAR-31-1998
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</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL TRUST
<SERIES>
   <NUMBER> 012
   <NAME> STATE STREET RESEARCH CAPITAL FUND CLASS B
       
<S>                             <C>
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</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL TRUST
<SERIES>
   <NUMBER> 013
   <NAME> STATE STREET RESEARCH CAPITAL FUND CLASS S
       
<S>                             <C>
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<FISCAL-YEAR-END>                          SEP-30-1998
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<OTHER-ITEMS-LIABILITIES>                    5,258,379
<TOTAL-LIABILITIES>                         24,088,029
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   808,367,785
<SHARES-COMMON-STOCK>                       10,785,026
<SHARES-COMMON-PRIOR>                       12,682,096
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                     35,014,750
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   367,354,258
<NET-ASSETS>                             1,210,736,793
<DIVIDEND-INCOME>                            1,808,160
<INTEREST-INCOME>                            1,144,912
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               9,948,838
<NET-INVESTMENT-INCOME>                    (6,995,766)
<REALIZED-GAINS-CURRENT>                    44,494,418
<APPREC-INCREASE-CURRENT>                   18,016,916
<NET-CHANGE-FROM-OPS>                       55,515,568
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                   (1,541,241)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      1,955,543
<NUMBER-OF-SHARES-REDEEMED>                (3,968,374)
<SHARES-REINVESTED>                            115,761
<NET-CHANGE-IN-ASSETS>                   (132,460,847)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    8,511,656
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        4,432,844
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              9,948,838
<AVERAGE-NET-ASSETS>                     1,182,091,733
<PER-SHARE-NAV-BEGIN>                            14.96
<PER-SHARE-NII>                                 (0.04)
<PER-SHARE-GAIN-APPREC>                           0.93
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                       (0.13)
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              15.72
<EXPENSE-RATIO>                                   1.09
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL TRUST
<SERIES>
   <NUMBER> 014
   <NAME> STATE STREET RESEARCH CAPITAL FUND CLASS C
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          SEP-30-1998
<PERIOD-END>                               MAR-31-1998
<INVESTMENTS-AT-COST>                      845,065,083
<INVESTMENTS-AT-VALUE>                   1,212,419,341
<RECEIVABLES>                               21,967,747
<ASSETS-OTHER>                                 437,734
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                           1,234,824,822
<PAYABLE-FOR-SECURITIES>                    18,829,650
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    5,258,379
<TOTAL-LIABILITIES>                         24,088,029
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   808,367,785
<SHARES-COMMON-STOCK>                        5,663,710
<SHARES-COMMON-PRIOR>                        8,418,494
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                     35,014,750
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   367,354,258
<NET-ASSETS>                             1,210,736,793
<DIVIDEND-INCOME>                            1,808,160
<INTEREST-INCOME>                            1,144,912
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               9,948,838
<NET-INVESTMENT-INCOME>                    (6,995,766)
<REALIZED-GAINS-CURRENT>                    44,494,418
<APPREC-INCREASE-CURRENT>                   18,016,916
<NET-CHANGE-FROM-OPS>                       55,515,568
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                     (889,094)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        665,064
<NUMBER-OF-SHARES-REDEEMED>                (3,484,975)
<SHARES-REINVESTED>                             65,127
<NET-CHANGE-IN-ASSETS>                   (132,460,847)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    8,511,656
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        4,432,844
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              9,948,838
<AVERAGE-NET-ASSETS>                     1,182,091,733
<PER-SHARE-NAV-BEGIN>                            14.26
<PER-SHARE-NII>                                 (0.11)
<PER-SHARE-GAIN-APPREC>                           0.88
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                       (0.13)
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              14.90
<EXPENSE-RATIO>                                   2.08
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<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-30-1998
<PERIOD-END>                               MAR-31-1998
<INVESTMENTS-AT-COST>                       97,737,734
<INVESTMENTS-AT-VALUE>                     121,710,103
<RECEIVABLES>                                1,522,777
<ASSETS-OTHER>                                 627,503
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             123,860,383
<PAYABLE-FOR-SECURITIES>                        43,500
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      501,216
<TOTAL-LIABILITIES>                            544,716
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    96,340,875
<SHARES-COMMON-STOCK>                        3,225,300
<SHARES-COMMON-PRIOR>                        2,218,121
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      3,002,423
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                    23,972,369
<NET-ASSETS>                               123,315,667
<DIVIDEND-INCOME>                              105,495
<INTEREST-INCOME>                              367,388
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 841,106
<NET-INVESTMENT-INCOME>                      (368,223)
<REALIZED-GAINS-CURRENT>                     6,040,071
<APPREC-INCREASE-CURRENT>                    2,341,296
<NET-CHANGE-FROM-OPS>                        8,013,144
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                   (5,928,768)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      1,140,623
<NUMBER-OF-SHARES-REDEEMED>                  (595,557)
<SHARES-REINVESTED>                            462,113
<NET-CHANGE-IN-ASSETS>                      33,890,503
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                   13,593,174
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          359,237
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                899,974
<AVERAGE-NET-ASSETS>                        95,796,533
<PER-SHARE-NAV-BEGIN>                            15.53
<PER-SHARE-NII>                                 (0.02)
<PER-SHARE-GAIN-APPREC>                           0.46
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                       (2.61)
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              13.36
<EXPENSE-RATIO>                                   1.35
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL TRUST
<SERIES>
   <NUMBER> 022
   <NAME> STATE STREET RESEARCH EMERGING GROWTH FUND CLASS B
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          SEP-30-1998
<PERIOD-END>                               MAR-31-1998
<INVESTMENTS-AT-COST>                       97,737,734
<INVESTMENTS-AT-VALUE>                     121,710,103
<RECEIVABLES>                                1,522,777
<ASSETS-OTHER>                                 627,503
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             123,860,383
<PAYABLE-FOR-SECURITIES>                        43,500
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      501,216
<TOTAL-LIABILITIES>                            544,716
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    96,340,875
<SHARES-COMMON-STOCK>                        4,871,336
<SHARES-COMMON-PRIOR>                        2,684,484
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      3,002,423
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                    23,972,369
<NET-ASSETS>                               123,315,667
<DIVIDEND-INCOME>                              105,495
<INTEREST-INCOME>                              367,388
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 841,106
<NET-INVESTMENT-INCOME>                      (368,223)
<REALIZED-GAINS-CURRENT>                     6,040,071
<APPREC-INCREASE-CURRENT>                    2,341,296
<NET-CHANGE-FROM-OPS>                        8,013,144
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                   (7,729,363)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      1,990,256
<NUMBER-OF-SHARES-REDEEMED>                  (326,400)
<SHARES-REINVESTED>                            522,996
<NET-CHANGE-IN-ASSETS>                      33,890,503
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                   13,593,174
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          359,237
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                899,974
<AVERAGE-NET-ASSETS>                        95,796,533
<PER-SHARE-NAV-BEGIN>                            15.09
<PER-SHARE-NII>                                 (0.07)
<PER-SHARE-GAIN-APPREC>                           0.43
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                       (2.61)
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              12.84
<EXPENSE-RATIO>                                   2.10
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL TRUST
<SERIES>
   <NUMBER> 023
   <NAME> STATE STREET RESEARCH EMERGING GROWTH FUND CLASS S
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          SEP-30-1998
<PERIOD-END>                               MAR-31-1998
<INVESTMENTS-AT-COST>                       97,737,734
<INVESTMENTS-AT-VALUE>                     121,710,103
<RECEIVABLES>                                1,522,777
<ASSETS-OTHER>                                 627,503
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             123,860,383
<PAYABLE-FOR-SECURITIES>                        43,500
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      501,216
<TOTAL-LIABILITIES>                            544,716
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    96,340,875
<SHARES-COMMON-STOCK>                          585,390
<SHARES-COMMON-PRIOR>                          445,503
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      3,002,423
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                    23,972,369
<NET-ASSETS>                               123,315,667
<DIVIDEND-INCOME>                              105,495
<INTEREST-INCOME>                              367,388
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 841,106
<NET-INVESTMENT-INCOME>                      (368,223)
<REALIZED-GAINS-CURRENT>                     6,040,071
<APPREC-INCREASE-CURRENT>                    2,341,296
<NET-CHANGE-FROM-OPS>                        8,013,144
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                   (1,185,620)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        152,697
<NUMBER-OF-SHARES-REDEEMED>                  (111,798)
<SHARES-REINVESTED>                             98,988
<NET-CHANGE-IN-ASSETS>                      33,890,503
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                   13,593,174
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          359,237
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                899,974
<AVERAGE-NET-ASSETS>                        95,796,533
<PER-SHARE-NAV-BEGIN>                            15.73
<PER-SHARE-NII>                                 (0.01)
<PER-SHARE-GAIN-APPREC>                           0.48
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                       (2.61)
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              13.59
<EXPENSE-RATIO>                                   1.10
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL TRUST
<SERIES>
   <NUMBER> 024
   <NAME> STATE STREET RESEARCH EMERGING GROWTH FUND CLASS C
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          SEP-30-1998
<PERIOD-END>                               MAR-31-1998
<INVESTMENTS-AT-COST>                       97,737,734
<INVESTMENTS-AT-VALUE>                     121,710,103
<RECEIVABLES>                                1,522,777
<ASSETS-OTHER>                                 627,503
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             123,860,383
<PAYABLE-FOR-SECURITIES>                        43,500
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      501,216
<TOTAL-LIABILITIES>                            544,716
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    96,340,875
<SHARES-COMMON-STOCK>                          756,054
<SHARES-COMMON-PRIOR>                          494,177
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      3,002,423
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                    23,972,369
<NET-ASSETS>                               123,315,667
<DIVIDEND-INCOME>                              105,495
<INTEREST-INCOME>                              367,388
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 841,106
<NET-INVESTMENT-INCOME>                      (368,223)
<REALIZED-GAINS-CURRENT>                     6,040,071
<APPREC-INCREASE-CURRENT>                    2,341,296
<NET-CHANGE-FROM-OPS>                        8,013,144
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                   (1,418,848)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        268,459
<NUMBER-OF-SHARES-REDEEMED>                   (81,091)
<SHARES-REINVESTED>                             74,509
<NET-CHANGE-IN-ASSETS>                      33,890,503
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                   13,593,174
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          359,237
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                899,974
<AVERAGE-NET-ASSETS>                        95,796,533
<PER-SHARE-NAV-BEGIN>                            15.10
<PER-SHARE-NII>                                 (0.07)
<PER-SHARE-GAIN-APPREC>                           0.43
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                       (2.61)
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              12.85
<EXPENSE-RATIO>                                   2.10
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL TRUST
<SERIES>
   <NUMBER> 031
   <NAME> STATE STREET RESEARCH AURORA FUND CLASS A
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          SEP-30-1998
<PERIOD-END>                               MAR-31-1998
<INVESTMENTS-AT-COST>                      586,505,856
<INVESTMENTS-AT-VALUE>                     660,800,154
<RECEIVABLES>                                3,444,376
<ASSETS-OTHER>                                  85,623
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             664,330,153
<PAYABLE-FOR-SECURITIES>                     2,830,654
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    2,900,881
<TOTAL-LIABILITIES>                          5,731,535
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   565,963,278
<SHARES-COMMON-STOCK>                        9,957,436
<SHARES-COMMON-PRIOR>                        7,621,324
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                     18,341,042
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                    74,294,298
<NET-ASSETS>                               658,598,618
<DIVIDEND-INCOME>                            1,962,423
<INTEREST-INCOME>                            3,089,062
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               5,336,525
<NET-INVESTMENT-INCOME>                      (285,040)
<REALIZED-GAINS-CURRENT>                    21,321,671
<APPREC-INCREASE-CURRENT>                   15,004,155
<NET-CHANGE-FROM-OPS>                       36,040,786
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                   (2,253,302)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      4,526,095
<NUMBER-OF-SHARES-REDEEMED>                (2,287,337)
<SHARES-REINVESTED>                             97,354
<NET-CHANGE-IN-ASSETS>                     183,144,006
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    4,156,803
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        2,517,266
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              5,336,525
<AVERAGE-NET-ASSETS>                       592,297,882
<PER-SHARE-NAV-BEGIN>                            20.71
<PER-SHARE-NII>                                   0.04
<PER-SHARE-GAIN-APPREC>                           1.26
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                       (0.23)
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              21.78
<EXPENSE-RATIO>                                   1.31
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL TRUST
<SERIES>
   <NUMBER> 032
   <NAME> STATE STREET RESEARCH AURORA FUND CLASS B
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          SEP-30-1998
<PERIOD-END>                               MAR-31-1998
<INVESTMENTS-AT-COST>                      586,505,856
<INVESTMENTS-AT-VALUE>                     660,800,154
<RECEIVABLES>                                3,444,376
<ASSETS-OTHER>                                  85,623
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             664,330,153
<PAYABLE-FOR-SECURITIES>                     2,830,654
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    2,900,881
<TOTAL-LIABILITIES>                          5,731,535
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   565,963,278
<SHARES-COMMON-STOCK>                       15,933,224
<SHARES-COMMON-PRIOR>                       11,606,420
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                     18,341,042
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                    74,294,298
<NET-ASSETS>                               658,598,618
<DIVIDEND-INCOME>                            1,962,423
<INTEREST-INCOME>                            3,089,062
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               5,336,525
<NET-INVESTMENT-INCOME>                      (285,040)
<REALIZED-GAINS-CURRENT>                    21,321,671
<APPREC-INCREASE-CURRENT>                   15,004,155
<NET-CHANGE-FROM-OPS>                       36,040,786
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                   (3,455,053)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      5,156,229
<NUMBER-OF-SHARES-REDEEMED>                  (948,508)
<SHARES-REINVESTED>                            119,083
<NET-CHANGE-IN-ASSETS>                     183,144,006
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    4,156,803
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
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<PER-SHARE-NAV-BEGIN>                            20.33
<PER-SHARE-NII>                                 (0.04)
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<RETURNS-OF-CAPITAL>                                 0
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<EXPENSE-RATIO>                                   2.06
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</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL TRUST
<SERIES>
   <NUMBER> 033
   <NAME> STATE STREET RESEARCH AURORA FUND CLASS S
       
<S>                             <C>
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<PERIOD-END>                               MAR-31-1998
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<RECEIVABLES>                                3,444,376
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<PAYABLE-FOR-SECURITIES>                     2,830,654
<SENIOR-LONG-TERM-DEBT>                              0
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<SHARES-COMMON-PRIOR>                          697,968
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<APPREC-INCREASE-CURRENT>                   15,004,155
<NET-CHANGE-FROM-OPS>                       36,040,786
<EQUALIZATION>                                       0
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<DISTRIBUTIONS-OF-GAINS>                     (107,482)
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</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL TRUST
<SERIES>
   <NUMBER> 034
   <NAME> STATE STREET RESEARCH AURORA FUND CLASS C
       
<S>                             <C>
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<OTHER-ITEMS-LIABILITIES>                    2,900,881
<TOTAL-LIABILITIES>                          5,731,535
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<PER-SHARE-NAV-BEGIN>                            20.32
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</TABLE>


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