STATE STREET RESEARCH CAPITAL TRUST
NSAR-A, 1999-05-28
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<PAGE>      PAGE  1
000 A000000 03/31/99
000 C000000 0000727101
000 D000000 N
000 E000000 F
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0
000 J000000 A
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
007 B000000  3
007 C010100  1
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
007 C030300 N
007 C010400  4
007 C010500  5
007 C010600  6
007 C010700  7
007 C010800  8
007 C010900  9
007 C011000 10
013 A00AA01 PRICEWATERHOUSECOOPERS LLP
013 B01AA01 BOSTON
013 B02AA01 MA
013 B03AA01 02110
014 A00AA01 STATE STREET RESEARCH INVESTMENT SERVICES INC
014 B00AA01 8-35442
014 A00AA02 METROPOLITAN LIFE INSURANCE COMPANY
014 B00AA02 8-14901
018  00AA00 Y
019 A00AA00 Y
019 B00AA00   24
019 C00AA00 STATESTRES
<PAGE>      PAGE  2
020 A000001 SALOMON SMITH BARNEY
020 B000001 11-2418191
020 C000001     78
020 A000002 ABEL\NOSER CORP.
020 B000002 13-2833083
020 C000002     72
020 A000003 MORGAN STANLEY & CO.
020 B000003 13-2655998
020 C000003     71
020 A000004 MERRILL LYNCH PIERCE FENNER & SMITH, INC.
020 B000004 13-5674085
020 C000004     69
020 A000005 CS FIRST BOSTON CORP.
020 B000005 13-5659485
020 C000005     56
020 A000006 GOLDMAN SACHS & CO.
020 B000006 13-5108880
020 C000006     54
020 A000007 SANFORD C. BERNSTEIN & CO.
020 B000007 13-2625874
020 C000007     43
020 A000008 LEHMAN BROTHERS INC.
020 B000008 13-2518466
020 C000008     43
020 A000009 DONALDSON, LUFKIN & JENRETTE SECURITIES CORP.
020 B000009 13-2741729
020 C000009     41
020 A000010 MONTGOMERY SECURITIES
020 B000010 94-1701676
020 C000010     39
021  000000     1373
022 A000001 FORD MOTOR CREDIT CO.
022 C000001    417065
022 D000001         0
022 A000002 AMERICAN EXPRESS CREDIT CO.
022 C000002    364620
022 D000002         0
022 A000003 HOUSEHOLD FINANCE CORP.
022 C000003    285808
022 D000003         0
022 A000004 GENERAL ELECTRIC CAPITAL CORP
022 C000004    255476
022 D000004         0
022 A000005 DEERE & CO.
022 C000005    128446
022 D000005         0
022 A000006 ASSOCIATES CORP. OF NORTH AMERICA
022 C000006     85855
022 D000006         0
022 A000007 GOLDMAN SACHS & CO.
022 B000007 13-5108880
<PAGE>      PAGE  3
022 C000007     75081
022 D000007         0
022 A000008 EXXON
022 C000008     69300
022 D000008         0
022 A000009 STATE STREET BANK & TRUST CO.
022 C000009     54878
022 D000009         0
022 A000010 CS FIRST BOSTON CORP
022 B000010 13-5659485
022 C000010     51884
022 D000010         0
023 C000000    2058637
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070 E01AA00 Y
070 E02AA00 N
070 F01AA00 Y
070 F02AA00 N
070 G01AA00 Y
070 G02AA00 N
070 H01AA00 Y
070 H02AA00 N
070 I01AA00 N
070 I02AA00 N
070 J01AA00 Y
070 J02AA00 Y
070 K01AA00 Y
070 K02AA00 N
070 L01AA00 Y
070 L02AA00 N
<PAGE>      PAGE  4
070 M01AA00 Y
070 M02AA00 N
070 N01AA00 Y
070 N02AA00 Y
070 O01AA00 Y
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070 P01AA00 N
070 P02AA00 N
070 Q01AA00 N
070 Q02AA00 N
070 R01AA00 N
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077 P000000 N
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080 A00AA00 FEDERAL INSURANCE COMPANY
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<PAGE>      PAGE  5
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<PAGE>      PAGE  6
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<PAGE>      PAGE  7
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066 A000100 Y
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<PAGE>      PAGE  8
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<PAGE>      PAGE  9
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030 B000200  5.75
030 C000200  0.00
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031 B000200      0
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033  000200    369
034  000200 Y
035  000200    121
036 A000200 N
036 B000200      0
037  000200 N
038  000200      0
039  000200 N
040  000200 Y
041  000200 Y
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042 C000200   0
042 D000200  95
042 E000200   2
042 F000200   0
042 G000200   2
042 H000200   0
043  000200    327
044  000200    244
055 A000200 N
055 B000200 N
056  000200 Y
057  000200 N
<PAGE>      PAGE  10
061  000200     2500
062 A000200 N
062 B000200   0.0
062 C000200   0.0
062 D000200   0.0
062 E000200   0.0
062 F000200   0.0
062 G000200   0.0
062 H000200   0.0
062 I000200   0.0
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062 M000200   0.0
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062 O000200   0.0
062 P000200   0.0
062 Q000200   0.0
062 R000200   0.0
066 A000200 Y
066 B000200 Y
066 C000200 N
066 D000200 N
066 E000200 N
066 F000200 N
066 G000200 N
067  000200 N
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072 C000200       80
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<PAGE>      PAGE  11
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<PAGE>      PAGE  12
075 B000200    95685
076  000200     0.00
028 A010300     17841
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033  000300     88
034  000300 Y
035  000300    799
036 A000300 N
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037  000300 N
038  000300      0
039  000300 N
040  000300 Y
041  000300 Y
042 A000300   0
042 B000300   0
042 C000300   0
<PAGE>      PAGE  13
042 D000300 100
042 E000300   0
042 F000300   0
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042 H000300   0
043  000300   1535
044  000300    816
055 A000300 N
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056  000300 Y
057  000300 N
061  000300    25000
062 A000300 N
062 B000300   0.0
062 C000300   0.0
062 D000300   0.0
062 E000300   0.0
062 F000300   0.0
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066 A000300 Y
066 B000300 Y
066 C000300 N
066 D000300 N
066 E000300 N
066 F000300 N
067  000300 N
068 A000300 N
068 B000300 N
069  000300 N
071 A000300    118952
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<PAGE>      PAGE  14
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<PAGE>      PAGE  15
074 S000300        0
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076  000300     0.00
SIGNATURE   DOUGLAS A. ROMICH
TITLE       TREASURER


WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<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
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-END>                               MAR-31-1999
<INVESTMENTS-AT-COST>                      701,616,856
<INVESTMENTS-AT-VALUE>                     928,911,878
<RECEIVABLES>                               10,302,653
<ASSETS-OTHER>                                  93,974
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             939,308,505
<PAYABLE-FOR-SECURITIES>                     8,932,372
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                   32,035,362
<TOTAL-LIABILITIES>                         40,967,734
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   646,687,980
<SHARES-COMMON-STOCK>                       26,395,995
<SHARES-COMMON-PRIOR>                       26,700,533
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                     24,357,769
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   227,295,022
<NET-ASSETS>                               898,340,711
<DIVIDEND-INCOME>                            1,076,608
<INTEREST-INCOME>                              759,363
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               7,819,896
<NET-INVESTMENT-INCOME>                    (5,983,925)
<REALIZED-GAINS-CURRENT>                    24,439,156
<APPREC-INCREASE-CURRENT>                  180,762,743
<NET-CHANGE-FROM-OPS>                      199,217,974
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                  (34,950,690)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                     20,037,016
<NUMBER-OF-SHARES-REDEEMED>               (23,178,901)
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<ACCUMULATED-NII-PRIOR>                              0
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<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
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<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              7,926,705
<AVERAGE-NET-ASSETS>                       907,018,063
<PER-SHARE-NAV-BEGIN>                            11.95
<PER-SHARE-NII>                                 (0.06)
<PER-SHARE-GAIN-APPREC>                           2.87
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                       (1.32)
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              13.44
<EXPENSE-RATIO>                                   1.42
[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> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL TRUST
<SERIES>
   <NUMBER> 012
   <NAME> STATE STREET RESEARCH CAPITAL FUND CLASS B

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-END>                               MAR-31-1999
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<INVESTMENTS-AT-VALUE>                     928,911,878
<RECEIVABLES>                               10,302,653
<ASSETS-OTHER>                                  93,974
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             939,308,505
<PAYABLE-FOR-SECURITIES>                     8,932,372
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                   32,035,362
<TOTAL-LIABILITIES>                         40,967,734
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   646,687,980
<SHARES-COMMON-STOCK>                       29,540,611
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<ACCUMULATED-NET-GAINS>                     24,357,769
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   227,295,022
<NET-ASSETS>                               898,340,771
<DIVIDEND-INCOME>                            1,076,608
<INTEREST-INCOME>                              759,363
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               7,819,896
<NET-INVESTMENT-INCOME>                    (5,983,925)
<REALIZED-GAINS-CURRENT>                    24,439,156
<APPREC-INCREASE-CURRENT>                  180,762,743
<NET-CHANGE-FROM-OPS>                      199,217,974
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                  (41,134,345)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      1,075,280
<NUMBER-OF-SHARES-REDEEMED>                (6,872,301)
<SHARES-REINVESTED>                          3,398,217
<NET-CHANGE-IN-ASSETS>                      45,454,744
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                   93,139,266
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        3,282,019
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              7,926,705
<AVERAGE-NET-ASSETS>                       907,018,063
<PER-SHARE-NAV-BEGIN>                            11.45
<PER-SHARE-NII>                                 (0.11)
<PER-SHARE-GAIN-APPREC>                           2.74
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                       (1.32)
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              12.76
<EXPENSE-RATIO>                                   2.17
[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> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL TRUST
<SERIES>
   <NUMBER> 015
   <NAME> STATE STREET RESEARCH CAPITAL FUND CLASS B1

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-END>                               MAR-31-1999
<INVESTMENTS-AT-COST>                      701,616,856
<INVESTMENTS-AT-VALUE>                     928,911,878
<RECEIVABLES>                               10,302,653
<ASSETS-OTHER>                                  93,974
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             939,308,505
<PAYABLE-FOR-SECURITIES>                     8,932,372
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                   32,035,362
<TOTAL-LIABILITIES>                         40,967,734
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   646,687,980
<SHARES-COMMON-STOCK>                          295,761
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                     24,357,769
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   227,295,022
<NET-ASSETS>                               898,340,771
<DIVIDEND-INCOME>                            1,076,608
<INTEREST-INCOME>                              759,363
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               7,819,896
<NET-INVESTMENT-INCOME>                    (5,983,925)
<REALIZED-GAINS-CURRENT>                    24,439,156
<APPREC-INCREASE-CURRENT>                  180,762,743
<NET-CHANGE-FROM-OPS>                      199,217,974
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        302,993
<NUMBER-OF-SHARES-REDEEMED>                    (7,232)
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                      45,454,744
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                   93,139,266
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        3,282,019
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              7,926,705
<AVERAGE-NET-ASSETS>                       907,018,063
<PER-SHARE-NAV-BEGIN>                            13.17
<PER-SHARE-NII>                                  (.04)
<PER-SHARE-GAIN-APPREC>                          (.37)
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              12.76
<EXPENSE-RATIO>                                   2.20
[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> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL TRUST
<SERIES>
   <NUMBER> 013
   <NAME> STATE STREET RESEARCH CAPITAL FUND CLASS S

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-END>                               MAR-31-1999
<INVESTMENTS-AT-COST>                      701,616,856
<INVESTMENTS-AT-VALUE>                     928,911,878
<RECEIVABLES>                               10,302,653
<ASSETS-OTHER>                                  93,974
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             939,308,505
<PAYABLE-FOR-SECURITIES>                     8,932,372
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                   32,035,362
<TOTAL-LIABILITIES>                         40,967,734
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   646,687,980
<SHARES-COMMON-STOCK>                        8,166,389
<SHARES-COMMON-PRIOR>                        9,304,490
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                     24,357,769
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   227,295,022
<NET-ASSETS>                               898,340,771
<DIVIDEND-INCOME>                            1,076,608
<INTEREST-INCOME>                              759,363
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               7,819,896
<NET-INVESTMENT-INCOME>                    (5,983,925)
<REALIZED-GAINS-CURRENT>                    24,439,156
<APPREC-INCREASE-CURRENT>                  180,762,743
<NET-CHANGE-FROM-OPS>                      199,217,974
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                  (11,198,920)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      1,651,893
<NUMBER-OF-SHARES-REDEEMED>                (3,687,310)
<SHARES-REINVESTED>                            897,316
<NET-CHANGE-IN-ASSETS>                      45,454,744
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                   93,139,266
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        3,282,019
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              7,926,705
<AVERAGE-NET-ASSETS>                       907,018,063
<PER-SHARE-NAV-BEGIN>                            12.16
<PER-SHARE-NII>                                 (0.05)
<PER-SHARE-GAIN-APPREC>                           2.93
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                       (1.32)
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              13.72
<EXPENSE-RATIO>                                   1.17
[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> 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-30-1999
<PERIOD-END>                               MAR-31-1999
<INVESTMENTS-AT-COST>                      701,616,856
<INVESTMENTS-AT-VALUE>                     928,911,878
<RECEIVABLES>                               10,302,653
<ASSETS-OTHER>                                  93,974
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             939,308,505
<PAYABLE-FOR-SECURITIES>                     8,932,372
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                   32,035,362
<TOTAL-LIABILITIES>                         40,967,734
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   646,687,980
<SHARES-COMMON-STOCK>                        3,961,374
<SHARES-COMMON-PRIOR>                        4,814,806
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                     24,357,769
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   227,295,022
<NET-ASSETS>                               898,340,771
<DIVIDEND-INCOME>                            1,076,608
<INTEREST-INCOME>                              759,363
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               7,819,896
<NET-INVESTMENT-INCOME>                    (5,983,925)
<REALIZED-GAINS-CURRENT>                    24,439,156
<APPREC-INCREASE-CURRENT>                  180,762,743
<NET-CHANGE-FROM-OPS>                      199,217,974
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                   (5,936,698)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        612,393
<NUMBER-OF-SHARES-REDEEMED>                (1,937,192)
<SHARES-REINVESTED>                            471,367
<NET-CHANGE-IN-ASSETS>                      45,454,744
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                   93,139,266
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        3,282,019
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              7,926,705
<AVERAGE-NET-ASSETS>                       907,018,063
<PER-SHARE-NAV-BEGIN>                            11.47
<PER-SHARE-NII>                                 (0.11)
<PER-SHARE-GAIN-APPREC>                           2.75
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                       (1.32)
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              12.79
<EXPENSE-RATIO>                                   2.17
[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> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL FUND
<SERIES>
   <NUMBER> 021
   <NAME> STATE STREET RESEARCH EMERGING GROWTH FUND CLASS A

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-END>                               MAR-31-1999
<INVESTMENTS-AT-COST>                       91,297,826
<INVESTMENTS-AT-VALUE>                      98,089,257
<RECEIVABLES>                                1,272,959
<ASSETS-OTHER>                                  67,828
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              99,430,044
<PAYABLE-FOR-SECURITIES>                     1,362,771
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    3,909,152
<TOTAL-LIABILITIES>                          5,271,923
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    96,951,571
<SHARES-COMMON-STOCK>                        3,072,126
<SHARES-COMMON-PRIOR>                        3,484,170
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                    (9,584,881)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     6,791,431
<NET-ASSETS>                                94,158,121
<DIVIDEND-INCOME>                               79,876
<INTEREST-INCOME>                              243,668
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 853,258
<NET-INVESTMENT-INCOME>                      (529,714)
<REALIZED-GAINS-CURRENT>                   (9,346,421)
<APPREC-INCREASE-CURRENT>                   27,606,628
<NET-CHANGE-FROM-OPS>                       17,730,493
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                   (1,253,717)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      4,197,036
<NUMBER-OF-SHARES-REDEEMED>                (4,736,906)
<SHARES-REINVESTED>                            127,826
<NET-CHANGE-IN-ASSETS>                       5,013,789
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    3,515,228
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          358,820
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              1,052,106
<AVERAGE-NET-ASSETS>                        95,685,333
<PER-SHARE-NAV-BEGIN>                             8.86
<PER-SHARE-NII>                                 (0.03)
<PER-SHARE-GAIN-APPREC>                           1.80
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                       (0.37)
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              10.26
<EXPENSE-RATIO>                                   1.39
[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> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL FUND
<SERIES>
   <NUMBER> 022
   <NAME> STATE STREET RESEARCH EMERGING GROWTH FUND CLASS B

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-END>                               MAR-31-1999
<INVESTMENTS-AT-COST>                       91,297,826
<INVESTMENTS-AT-VALUE>                      98,089,257
<RECEIVABLES>                                1,272,959
<ASSETS-OTHER>                                  67,828
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              99,430,044
<PAYABLE-FOR-SECURITIES>                     1,362,771
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    3,909,152
<TOTAL-LIABILITIES>                          5,271,923
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    96,951,571
<SHARES-COMMON-STOCK>                        4,876,302
<SHARES-COMMON-PRIOR>                        5,459,771
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                    (9,584,881)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     6,791,431
<NET-ASSETS>                                94,158,121
<DIVIDEND-INCOME>                               79,876
<INTEREST-INCOME>                              243,668
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 853,258
<NET-INVESTMENT-INCOME>                      (529,714)
<REALIZED-GAINS-CURRENT>                   (9,346,421)
<APPREC-INCREASE-CURRENT>                   27,606,628
<NET-CHANGE-FROM-OPS>                       17,730,493
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                   (1,968,138)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        509,432
<NUMBER-OF-SHARES-REDEEMED>                (1,296,516)
<SHARES-REINVESTED>                            203,615
<NET-CHANGE-IN-ASSETS>                       5,013,789
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    3,515,228
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          358,820
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              1,052,106
<AVERAGE-NET-ASSETS>                        95,685,333
<PER-SHARE-NAV-BEGIN>                             8.48
<PER-SHARE-NII>                                 (0.07)
<PER-SHARE-GAIN-APPREC>                           1.74
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                       (0.37)
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               9.78
<EXPENSE-RATIO>                                   2.14
[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> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL FUND
<SERIES>
   <NUMBER> 023
   <NAME> STATE STREET RESEARCH EMERGING GROWTH FUND CLASS S

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-END>                               MAR-31-1999
<INVESTMENTS-AT-COST>                       91,297,826
<INVESTMENTS-AT-VALUE>                      98,089,257
<RECEIVABLES>                                1,272,959
<ASSETS-OTHER>                                  67,828
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              99,430,044
<PAYABLE-FOR-SECURITIES>                     1,362,771
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    3,909,152
<TOTAL-LIABILITIES>                          5,271,923
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    96,951,571
<SHARES-COMMON-STOCK>                          569,348
<SHARES-COMMON-PRIOR>                          549,656
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                    (9,584,881)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     6,791,431
<NET-ASSETS>                                94,158,121
<DIVIDEND-INCOME>                               79,876
<INTEREST-INCOME>                              243,668
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 853,258
<NET-INVESTMENT-INCOME>                      (529,714)
<REALIZED-GAINS-CURRENT>                   (9,346,421)
<APPREC-INCREASE-CURRENT>                   27,606,628
<NET-CHANGE-FROM-OPS>                       17,730,493
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                     (221,009)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        168,994
<NUMBER-OF-SHARES-REDEEMED>                  (171,854)
<SHARES-REINVESTED>                             22,552
<NET-CHANGE-IN-ASSETS>                       5,013,789
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    3,515,228
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          358,820
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              1,052,106
<AVERAGE-NET-ASSETS>                        95,685,333
<PER-SHARE-NAV-BEGIN>                             9.02
<PER-SHARE-NII>                                 (0.02)
<PER-SHARE-GAIN-APPREC>                           1.85
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                       (0.37)
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              10.48
<EXPENSE-RATIO>                                   1.14
[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> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL FUND
<SERIES>
   <NUMBER> 024
   <NAME> STATE STREET RESEARCH EMERGING GROWTH FUND CLASS C

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-END>                               MAR-31-1999
<INVESTMENTS-AT-COST>                       91,297,826
<INVESTMENTS-AT-VALUE>                      98,089,257
<RECEIVABLES>                                1,272,959
<ASSETS-OTHER>                                  67,828
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              99,430,044
<PAYABLE-FOR-SECURITIES>                     1,362,771
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    3,909,152
<TOTAL-LIABILITIES>                          5,271,923
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    96,951,571
<SHARES-COMMON-STOCK>                          744,888
<SHARES-COMMON-PRIOR>                          826,278
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                    (9,584,881)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     6,791,431
<NET-ASSETS>                                94,158,121
<DIVIDEND-INCOME>                               79,876
<INTEREST-INCOME>                              243,668
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 853,258
<NET-INVESTMENT-INCOME>                      (529,714)
<REALIZED-GAINS-CURRENT>                   (9,346,421)
<APPREC-INCREASE-CURRENT>                   27,606,628
<NET-CHANGE-FROM-OPS>                       17,730,493
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                     (310,824)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      1,069,761
<NUMBER-OF-SHARES-REDEEMED>                (1,182,813)
<SHARES-REINVESTED>                             31,662
<NET-CHANGE-IN-ASSETS>                       5,013,789
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    3,515,228
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          358,820
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              1,052,106
<AVERAGE-NET-ASSETS>                        95,685,333
<PER-SHARE-NAV-BEGIN>                             8.49
<PER-SHARE-NII>                                 (0.07)
<PER-SHARE-GAIN-APPREC>                           1.74
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                       (0.37)
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               9.79
<EXPENSE-RATIO>                                   2.14
[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> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL FUND
<SERIES>
   <NUMBER> 025
   <NAME> STATE STREET RESEARCH EMERGING GROWTH FUND CLASS B1

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-END>                               MAR-31-1999
<INVESTMENTS-AT-COST>                       91,297,826
<INVESTMENTS-AT-VALUE>                      98,089,257
<RECEIVABLES>                                1,272,959
<ASSETS-OTHER>                                  67,828
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              99,430,044
<PAYABLE-FOR-SECURITIES>                     1,362,771
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    3,909,152
<TOTAL-LIABILITIES>                          5,271,923
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    96,951,571
<SHARES-COMMON-STOCK>                          171,502
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                    (9,584,881)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     6,791,431
<NET-ASSETS>                                94,158,121
<DIVIDEND-INCOME>                               79,876
<INTEREST-INCOME>                              243,668
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 853,258
<NET-INVESTMENT-INCOME>                      (529,714)
<REALIZED-GAINS-CURRENT>                   (9,346,421)
<APPREC-INCREASE-CURRENT>                   27,606,628
<NET-CHANGE-FROM-OPS>                       17,730,493
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        175,083
<NUMBER-OF-SHARES-REDEEMED>                    (3,581)
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                       5,013,789
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    3,515,228
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          358,820
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              1,052,106
<AVERAGE-NET-ASSETS>                        95,685,333
<PER-SHARE-NAV-BEGIN>                            10.22
<PER-SHARE-NII>                                 (0.03)
<PER-SHARE-GAIN-APPREC>                         (0.40)
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               9.79
<EXPENSE-RATIO>                                   1.60
[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> 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-30-1999
<PERIOD-END>                               MAR-31-1999
<INVESTMENTS-AT-COST>                      438,054,452
<INVESTMENTS-AT-VALUE>                     372,975,253
<RECEIVABLES>                               11,848,400
<ASSETS-OTHER>                                  33,740
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             384,857,393
<PAYABLE-FOR-SECURITIES>                     3,819,060
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                   15,109,474
<TOTAL-LIABILITIES>                         18,928,534
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   439,194,080
<SHARES-COMMON-STOCK>                        7,374,643
<SHARES-COMMON-PRIOR>                        7,494,241
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                     8,186,022
<ACCUM-APPREC-OR-DEPREC>                  (65,079,199)
<NET-ASSETS>                               365,928,859
<DIVIDEND-INCOME>                            1,839,437
<INTEREST-INCOME>                            1,574,435
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               4,111,661
<NET-INVESTMENT-INCOME>                      (697,789)
<REALIZED-GAINS-CURRENT>                   (6,123,430)
<APPREC-INCREASE-CURRENT>                   15,770,490
<NET-CHANGE-FROM-OPS>                        8,949,271
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      2,730,664
<NUMBER-OF-SHARES-REDEEMED>                (2,850,262)
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                    (22,706,714)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                 (2,062,592)
<GROSS-ADVISORY-FEES>                        1,703,576
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              4,145,037
<AVERAGE-NET-ASSETS>                       400,841,412
<PER-SHARE-NAV-BEGIN>                            15.47
<PER-SHARE-NII>                                   0.01
<PER-SHARE-GAIN-APPREC>                           0.36
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              15.84
<EXPENSE-RATIO>                                   1.55
[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> 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-30-1999
<PERIOD-END>                               MAR-31-1999
<INVESTMENTS-AT-COST>                      438,054,452
<INVESTMENTS-AT-VALUE>                     372,975,253
<RECEIVABLES>                               11,848,400
<ASSETS-OTHER>                                  33,740
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             384,857,393
<PAYABLE-FOR-SECURITIES>                     3,819,060
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                   15,109,474
<TOTAL-LIABILITIES>                         18,928,534
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   439,194,080
<SHARES-COMMON-STOCK>                       12,089,247
<SHARES-COMMON-PRIOR>                       13,959,855
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                     8,186,022
<ACCUM-APPREC-OR-DEPREC>                  (65,079,199)
<NET-ASSETS>                               365,928,859
<DIVIDEND-INCOME>                            1,839,437
<INTEREST-INCOME>                            1,574,435
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               4,111,661
<NET-INVESTMENT-INCOME>                      (697,789)
<REALIZED-GAINS-CURRENT>                   (6,123,430)
<APPREC-INCREASE-CURRENT>                   15,770,490
<NET-CHANGE-FROM-OPS>                        8,949,271
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      1,861,161
<NUMBER-OF-SHARES-REDEEMED>                (3,731,769)
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                    (22,706,714)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                 (2,062,592)
<GROSS-ADVISORY-FEES>                        1,703,576
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              4,145,037
<AVERAGE-NET-ASSETS>                       400,841,412
<PER-SHARE-NAV-BEGIN>                            15.07
<PER-SHARE-NII>                                 (0.05)
<PER-SHARE-GAIN-APPREC>                           0.35
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              15.37
<EXPENSE-RATIO>                                   2.30
[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> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL TRUST
<SERIES>
   <NUMBER> 033
   <NAME> STATE STREET RESEARCH AURORA FUND CLASS S

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-END>                               MAR-31-1999
<INVESTMENTS-AT-COST>                      438,054,452
<INVESTMENTS-AT-VALUE>                     372,975,253
<RECEIVABLES>                               11,848,400
<ASSETS-OTHER>                                  33,740
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             384,857,393
<PAYABLE-FOR-SECURITIES>                     3,819,060
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                   15,109,474
<TOTAL-LIABILITIES>                         18,928,534
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   439,194,080
<SHARES-COMMON-STOCK>                           90,424
<SHARES-COMMON-PRIOR>                           48,090
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                     8,186,022
<ACCUM-APPREC-OR-DEPREC>                  (65,079,199)
<NET-ASSETS>                               365,928,859
<DIVIDEND-INCOME>                            1,839,437
<INTEREST-INCOME>                            1,574,435
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               4,111,661
<NET-INVESTMENT-INCOME>                      (697,789)
<REALIZED-GAINS-CURRENT>                   (6,123,430)
<APPREC-INCREASE-CURRENT>                   15,770,490
<NET-CHANGE-FROM-OPS>                        8,949,271
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                         49,613
<NUMBER-OF-SHARES-REDEEMED>                    (7,279)
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                    (22,706,714)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                 (2,062,592)
<GROSS-ADVISORY-FEES>                        1,703,576
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              4,145,037
<AVERAGE-NET-ASSETS>                       400,841,412
<PER-SHARE-NAV-BEGIN>                            15.60
<PER-SHARE-NII>                                   0.04
<PER-SHARE-GAIN-APPREC>                           0.35
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              15.99
<EXPENSE-RATIO>                                   1.30
[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> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL TRUST
<SERIES>
   <NUMBER> 034
   <NAME> STATE STREET RESEARCH AURORA FUND CLASS C

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-END>                               MAR-31-1999
<INVESTMENTS-AT-COST>                      438,054,452
<INVESTMENTS-AT-VALUE>                     372,975,253
<RECEIVABLES>                               11,848,400
<ASSETS-OTHER>                                  33,740
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             384,857,393
<PAYABLE-FOR-SECURITIES>                     3,819,060
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                   15,109,474
<TOTAL-LIABILITIES>                         18,928,534
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   439,194,080
<SHARES-COMMON-STOCK>                        3,700,929
<SHARES-COMMON-PRIOR>                        4,082,629
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                     8,186,022
<ACCUM-APPREC-OR-DEPREC>                  (65,079,199)
<NET-ASSETS>                               365,928,859
<DIVIDEND-INCOME>                            1,839,437
<INTEREST-INCOME>                            1,574,435
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               4,111,661
<NET-INVESTMENT-INCOME>                      (697,789)
<REALIZED-GAINS-CURRENT>                   (6,123,430)
<APPREC-INCREASE-CURRENT>                   15,770,490
<NET-CHANGE-FROM-OPS>                       8,949,271
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      1,103,036
<NUMBER-OF-SHARES-REDEEMED>                  1,484,736
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                    (22,706,714)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                 (2,062,592)
<GROSS-ADVISORY-FEES>                        1,703,576
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              4,145,037
<AVERAGE-NET-ASSETS>                       400,841,412
<PER-SHARE-NAV-BEGIN>                            15.06
<PER-SHARE-NII>                                 (0.05)
<PER-SHARE-GAIN-APPREC>                           0.36
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              15.37
<EXPENSE-RATIO>                                   2.30
[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> 0000727101
<NAME> STATE STREET RESEARCH CAPITAL TRUST
<SERIES>
   <NUMBER> 035
   <NAME> STATE STREET RESEARCH AURORA FUND CLASS B1

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-END>                               MAR-31-1999
<INVESTMENTS-AT-COST>                      438,054,452
<INVESTMENTS-AT-VALUE>                     372,975,253
<RECEIVABLES>                               11,848,400
<ASSETS-OTHER>                                  33,740
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             384,857,393
<PAYABLE-FOR-SECURITIES>                     3,819,060
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                   15,109,474
<TOTAL-LIABILITIES>                         18,928,534
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   439,194,080
<SHARES-COMMON-STOCK>                          326,852
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                     8,186,022
<ACCUM-APPREC-OR-DEPREC>                  (65,079,199)
<NET-ASSETS>                               365,928,859
<DIVIDEND-INCOME>                            1,839,437
<INTEREST-INCOME>                            1,574,435
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               4,111,661
<NET-INVESTMENT-INCOME>                      (697,789)
<REALIZED-GAINS-CURRENT>                   (6,123,430)
<APPREC-INCREASE-CURRENT>                   15,770,490
<NET-CHANGE-FROM-OPS>                       8,949,271
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        336,345
<NUMBER-OF-SHARES-REDEEMED>                    (9,493)
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                    (22,706,714)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                 (2,062,592)
<GROSS-ADVISORY-FEES>                        1,703,576
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              4,145,037
<AVERAGE-NET-ASSETS>                       400,841,412
<PER-SHARE-NAV-BEGIN>                            16.17
<PER-SHARE-NII>                                 (0.02)
<PER-SHARE-GAIN-APPREC>                           0.78
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              15.37
<EXPENSE-RATIO>                                   2.33
[AVG-DEBT-OUTSTANDING]                               0
[AVG-DEBT-PER-SHARE]                                 0


</TABLE>


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