<PAGE> PAGE 1
000 B000000 09/30/98
000 C000000 0000727101
000 D000000 N
000 E000000 F
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0
000 J000000 U
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
018 00AA00 Y
019 A00AA00 Y
019 B00AA00 22
019 C00AA00 STATESTRES
020 A000001 LEHMAN BROTHERS, INC.
020 B000001 13-2518466
020 C000001 224
020 A000002 CS FIRST BOSTON CORP.
020 B000002 13-5659485
020 C000002 211
020 A000003 MORGAN STANLEY & CO.
020 B000003 13-2655998
<PAGE> PAGE 2
020 C000003 175
020 A000004 MERRILL LYNCH PIERCE FENNER & SMITH, INC.
020 B000004 13-5674085
020 C000004 167
020 A000005 BEAR, STEARNS SECURITIES
020 B000005 13-3299429
020 C000005 145
020 A000006 GOLDMAN SACHS & CO.
020 B000006 13-5108880
020 C000006 126
020 A000007 SMITH BARNEY, INC.
020 B000007 13-1912900
020 C000007 125
020 A000008 DONALDSON, LUFKIN & JENRETTE SECURITIES CORP
020 B000008 13-2741729
020 C000008 122
020 A000009 SANFORD C. BERNSTEIN & CO
020 B000009 13-2625874
020 C000009 122
020 A000010 PAINE WEBBER INC.
020 B000010 13-2638166
020 C000010 120
021 000000 3406
022 A000001 FORD MOTOR CREDIT CO.
022 C000001 848910
022 D000001 0
022 A000002 AMERICAN EXPRESS CREDIT CO
022 C000002 802386
022 D000002 0
022 A000003 MERRILL LYNCH PIERCE FENNER & SMITH INC.
022 B000003 13-5674082
022 C000003 612607
022 D000003 0
022 A000004 GENERAL ELECTRIC CAPITAL CORP
022 C000004 558182
022 D000004 0
022 A000005 HOUSEHOLD FINANCE CORP.
022 C000005 364555
022 D000005 0
022 A000006 CHEVRON OIL FINANCE CO.
022 C000006 297337
022 D000006 0
022 A000007 STATE STREET BANK & TRUST CO
022 C000007 170997
022 D000007 0
022 A000008 BENEFICIAL CORP.
022 C000008 161948
022 D000008 0
022 A000009 ASSOCIATES CORP. OF NORTH AMERICA
022 C000009 156994
022 D000009 0
<PAGE> PAGE 3
022 A000010 DEERE & CO.
022 C000010 144562
022 D000010 0
023 C000000 4724859
023 D000000 0
024 00AA00 Y
025 A00AA01 LEHMAN BROTHERS, INC.
025 B00AA01 13-2518466
025 C00AA01 D
025 D00AA01 18442
025 D00AA02 0
025 D00AA03 0
025 D00AA04 0
025 D00AA05 0
025 D00AA06 0
025 D00AA07 0
025 D00AA08 0
027 000000 Y
077 A000000 Y
077 B000000 Y
077 C000000 N
077 D000000 N
077 E000000 N
077 F000000 N
077 G000000 N
077 H000000 N
077 I000000 N
077 J000000 N
077 K000000 N
077 L000000 N
077 M000000 N
077 N000000 N
077 O000000 N
077 P000000 N
077 Q010000 N
077 Q020000 N
077 Q030000 N
078 000000 N
080 A00AA00 FEDERAL INSURANCE COMPANY
080 C00AA00 25000
081 A00AA00 Y
081 B00AA00 25
082 A00AA00 N
082 B00AA00 0
083 A00AA00 N
083 B00AA00 0
084 A00AA00 N
084 B00AA00 0
085 A00AA00 Y
085 B00AA00 N
086 A010000 0
<PAGE> PAGE 4
086 A020000 0
086 B010000 0
086 B020000 0
086 C010000 0
086 C020000 0
086 D010000 0
086 D020000 0
086 E010000 0
086 E020000 0
086 F010000 0
086 F020000 0
028 A010100 21527
028 A020100 0
028 A030100 0
028 A040100 38329
028 B010100 11684
028 B020100 0
028 B030100 0
028 B040100 26878
028 C010100 11880
028 C020100 0
028 C030100 0
028 C040100 21937
028 D010100 16449
028 D020100 0
028 D030100 0
028 D040100 32446
028 E010100 17520
028 E020100 0
028 E030100 0
028 E040100 35626
028 F010100 16678
028 F020100 0
028 F030100 0
028 F040100 35667
028 G010100 95738
028 G020100 0
028 G030100 0
028 G040100 190883
028 H000100 28654
029 000100 Y
030 A000100 760
030 B000100 4.50
030 C000100 0.00
031 A000100 89
031 B000100 0
032 000100 104
033 000100 567
034 000100 Y
035 000100 999
036 A000100 N
<PAGE> PAGE 5
036 B000100 0
037 000100 N
038 000100 0
039 000100 N
040 000100 Y
041 000100 Y
042 A000100 0
042 B000100 0
042 C000100 0
042 D000100 97
042 E000100 2
042 F000100 0
042 G000100 1
042 H000100 0
043 000100 6676
044 000100 1287
045 000100 Y
046 000100 N
047 000100 Y
048 000100 0.000
048 A010100 500000
048 A020100 0.750
048 B010100 500000
048 B020100 0.700
048 C010100 0
048 C020100 0.700
048 D010100 0
048 D020100 0.700
048 E010100 0
048 E020100 0.700
048 F010100 0
048 F020100 0.700
048 G010100 0
048 G020100 0.700
048 H010100 0
048 H020100 0.700
048 I010100 0
048 I020100 0.700
048 J010100 0
048 J020100 0.700
048 K010100 0
048 K020100 0.650
062 A000100 N
062 B000100 0.0
062 C000100 0.0
062 D000100 0.0
062 E000100 0.0
062 F000100 0.0
062 G000100 0.0
062 H000100 0.0
062 I000100 0.0
<PAGE> PAGE 6
062 J000100 0.0
062 K000100 0.0
062 L000100 0.0
062 M000100 0.0
062 N000100 0.0
062 O000100 0.0
062 P000100 0.0
062 Q000100 0.0
062 R000100 0.0
066 A000100 Y
066 B000100 Y
066 C000100 N
066 D000100 N
066 E000100 N
066 F000100 N
066 G000100 N
067 000100 N
068 A000100 N
068 B000100 N
069 000100 N
071 A000100 940372
071 B000100 1280973
071 C000100 1089207
071 D000100 86
072 A000100 12
072 B000100 2246
072 C000100 3466
072 D000100 0
072 E000100 0
072 F000100 8487
072 G000100 0
072 H000100 0
072 I000100 3528
072 J000100 240
072 K000100 0
072 L000100 261
072 M000100 39
072 N000100 250
072 O000100 0
072 P000100 0
072 Q000100 0
072 R000100 46
072 S000100 3
072 T000100 6675
072 U000100 0
072 V000100 0
072 W000100 40
072 X000100 19569
072 Y000100 0
072 Z000100 -13857
072AA000100 109471
<PAGE> PAGE 7
072BB000100 0
072CC010100 0
072CC020100 302805
072DD010100 0
072DD020100 0
072EE000100 10996
073 A010100 0.0000
073 A020100 0.0000
073 B000100 0.1300
073 C000100 0.0000
074 A000100 1
074 B000100 0
074 C000100 41998
074 D000100 0
074 E000100 0
074 F000100 802349
074 G000100 0
074 H000100 0
074 I000100 37504
074 J000100 14303
074 K000100 0
074 L000100 504
074 M000100 47
074 N000100 896706
074 O000100 2462
074 P000100 2035
074 Q000100 0
074 R010100 0
074 R020100 0
074 R030100 0
074 R040100 39323
074 S000100 0
074 T000100 852886
074 U010100 72759
074 U020100 0
074 V010100 12.16
074 V020100 11.47
074 W000100 0.0000
074 X000100 75840
074 Y000100 0
075 A000100 0
075 B000100 1135730
076 000100 0.00
028 A010200 7430
028 A020200 0
028 A030200 0
028 A040200 2715
028 B010200 6510
028 B020200 0
028 B030200 0
028 B040200 2161
<PAGE> PAGE 8
028 C010200 4825
028 C020200 0
028 C030200 0
028 C040200 2158
028 D010200 4050
028 D020200 0
028 D030200 0
028 D040200 3906
028 E010200 3827
028 E020200 0
028 E030200 0
028 E040200 4648
028 F010200 5436
028 F020200 0
028 F030200 0
028 F040200 5584
028 G010200 32078
028 G020200 0
028 G030200 0
028 G040200 21172
028 H000200 6793
029 000200 Y
030 A000200 381
030 B000200 4.50
030 C000200 0.00
031 A000200 45
031 B000200 0
032 000200 109
033 000200 227
034 000200 Y
035 000200 83
036 A000200 N
036 B000200 0
037 000200 N
038 000200 0
039 000200 N
040 000200 Y
041 000200 Y
042 A000200 1
042 B000200 0
042 C000200 0
042 D000200 92
042 E000200 4
042 F000200 0
042 G000200 3
042 H000200 0
043 000200 701
044 000200 476
062 A000200 N
062 B000200 0.0
062 C000200 0.0
<PAGE> PAGE 9
062 D000200 0.0
062 E000200 0.0
062 F000200 0.0
062 G000200 0.0
062 H000200 0.0
062 I000200 0.0
062 J000200 0.0
062 K000200 0.0
062 L000200 0.0
062 M000200 0.0
062 N000200 0.0
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
068 A000200 N
068 B000200 N
069 000200 N
071 A000200 127023
071 B000200 94632
071 C000200 96273
071 D000200 98
072 A000200 12
072 B000200 745
072 C000200 195
072 D000200 0
072 E000200 0
072 F000200 784
072 G000200 0
072 H000200 0
072 I000200 247
072 J000200 122
072 K000200 0
072 L000200 50
072 M000200 19
072 N000200 56
072 O000200 0
072 P000200 0
072 Q000200 0
072 R000200 25
072 S000200 2
072 T000200 701
072 U000200 6
<PAGE> PAGE 10
072 V000200 0
072 W000200 3
072 X000200 2015
072 Y000200 164
072 Z000200 -911
072AA000200 6291
072BB000200 0
072CC010200 0
072CC020200 42446
072DD010200 0
072DD020200 0
072EE000200 16263
073 A010200 0.0000
073 A020200 0.0000
073 B000200 2.6100
073 C000200 0.0000
074 A000200 39
074 B000200 0
074 C000200 6965
074 D000200 0
074 E000200 0
074 F000200 79281
074 G000200 0
074 H000200 0
074 I000200 3643
074 J000200 3300
074 K000200 59
074 L000200 170
074 M000200 14
074 N000200 93471
074 O000200 185
074 P000200 159
074 Q000200 0
074 R010200 0
074 R020200 0
074 R030200 0
074 R040200 3983
074 S000200 0
074 T000200 89144
074 U010200 10320
074 U020200 0
074 V010200 9.02
074 V020200 8.48
074 W000200 0.0000
074 X000200 12054
074 Y000200 0
075 A000200 0
075 B000200 104572
076 000200 0.00
028 A010300 9339
028 A020300 0
<PAGE> PAGE 11
028 A030300 0
028 A040300 12607
028 B010300 6596
028 B020300 0
028 B030300 0
028 B040300 10113
028 C010300 4831
028 C020300 0
028 C030300 0
028 C040300 20331
028 D010300 4159
028 D020300 0
028 D030300 0
028 D040300 34906
028 E010300 2914
028 E020300 0
028 E030300 0
028 E040300 30084
028 F010300 3990
028 F020300 0
028 F030300 0
028 F040300 18203
028 G010300 31829
028 G020300 0
028 G030300 0
028 G040300 126244
028 H000300 13558
029 000300 Y
030 A000300 1421
030 B000300 4.50
030 C000300 0.00
031 A000300 174
031 B000300 0
032 000300 1026
033 000300 221
034 000300 Y
035 000300 742
036 A000300 N
036 B000300 0
037 000300 N
038 000300 0
039 000300 N
040 000300 Y
041 000300 Y
042 A000300 3
042 B000300 1
042 C000300 0
042 D000300 85
042 E000300 6
042 F000300 0
042 G000300 5
<PAGE> PAGE 12
042 H000300 0
043 000300 4344
044 000300 339
062 A000300 N
062 B000300 0.0
062 C000300 0.0
062 D000300 0.0
062 E000300 0.0
062 F000300 0.0
062 G000300 0.0
062 H000300 0.0
062 I000300 0.0
062 J000300 0.0
062 K000300 0.0
062 L000300 0.0
062 M000300 0.0
062 N000300 0.0
062 O000300 0.0
062 P000300 0.0
062 Q000300 0.0
062 R000300 0.0
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 463220
071 B000300 340361
071 C000300 501995
071 D000300 68
072 A000300 12
072 B000300 3935
072 C000300 4606
072 D000300 0
072 E000300 0
072 F000300 4919
072 G000300 0
072 H000300 0
072 I000300 1100
072 J000300 277
072 K000300 0
072 L000300 62
072 M000300 41
072 N000300 193
072 O000300 0
072 P000300 0
<PAGE> PAGE 13
072 Q000300 0
072 R000300 22
072 S000300 2
072 T000300 4344
072 U000300 15
072 V000300 0
072 W000300 4
072 X000300 10979
072 Y000300 0
072 Z000300 -2438
072AA000300 3061
072BB000300 0
072CC010300 0
072CC020300 140140
072DD010300 0
072DD020300 0
072EE000300 6843
073 A010300 0.0000
073 A020300 0.0000
073 B000300 0.2300
073 C000300 0.0000
074 A000300 1
074 B000300 0
074 C000300 54702
074 D000300 0
074 E000300 0
074 F000300 335749
074 G000300 0
074 H000300 0
074 I000300 13893
074 J000300 146
074 K000300 0
074 L000300 934
074 M000300 22
074 N000300 405447
074 O000300 613
074 P000300 848
074 Q000300 0
074 R010300 0
074 R020300 0
074 R030300 0
074 R040300 15350
074 S000300 0
074 T000300 388636
074 U010300 25585
074 U020300 0
074 V010300 15.60
074 V020300 15.06
074 W000300 0.0000
074 X000300 21415
074 Y000300 0
<PAGE> PAGE 14
075 A000300 0
075 B000300 578719
076 000300 0.00
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> YEAR
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 835,318,523
<INVESTMENTS-AT-VALUE> 881,850,802
<RECEIVABLES> 14,807,379
<ASSETS-OTHER> 47,735
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 896,705,916
<PAYABLE-FOR-SECURITIES> 2,462,183
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 41,357,706
<TOTAL-LIABILITIES> 43,819,889
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 713,214,482
<SHARES-COMMON-STOCK> 26,700,533
<SHARES-COMMON-PRIOR> 31,944,062
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 93,139,266
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 46,532,279
<NET-ASSETS> 852,886,027
<DIVIDEND-INCOME> 3,465,656
<INTEREST-INCOME> 2,246,324
<OTHER-INCOME> 0
<EXPENSES-NET> 19,569,441
<NET-INVESTMENT-INCOME> (13,857,461)
<REALIZED-GAINS-CURRENT> 109,471,374
<APPREC-INCREASE-CURRENT> (302,805,063)
<NET-CHANGE-FROM-OPS> (207,191,150)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (3,841,210)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 3,863,891
<NUMBER-OF-SHARES-REDEEMED> (9,397,620)
<SHARES-REINVESTED> 290,200
<NET-CHANGE-IN-ASSETS> (490,311,613)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 8,511,656
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 8,487,275
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 19,569,441
<AVERAGE-NET-ASSETS> 1,135,730,294
<PER-SHARE-NAV-BEGIN> 14.74
<PER-SHARE-NII> (0.12)
<PER-SHARE-GAIN-APPREC> (2.54)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (0.13)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.95
<EXPENSE-RATIO> 1.39
<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> 012
<NAME> STATE STREET RESEARCH CAPITAL FUND CLASS B
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 835,318,523
<INVESTMENTS-AT-VALUE> 881,850,802
<RECEIVABLES> 14,807,379
<ASSETS-OTHER> 47,735
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 896,705,916
<PAYABLE-FOR-SECURITIES> 2,462,183
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 41,357,706
<TOTAL-LIABILITIES> 43,819,889
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 713,214,482
<SHARES-COMMON-STOCK> 31,939,415
<SHARES-COMMON-PRIOR> 39,506,904
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 93,139,266
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 46,532,279
<NET-ASSETS> 852,886,027
<DIVIDEND-INCOME> 3,465,656
<INTEREST-INCOME> 2,246,324
<OTHER-INCOME> 0
<EXPENSES-NET> 19,569,441
<NET-INVESTMENT-INCOME> (13,857,461)
<REALIZED-GAINS-CURRENT> 109,471,374
<APPREC-INCREASE-CURRENT> (302,805,063)
<NET-CHANGE-FROM-OPS> (207,191,150)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (4,724,072)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 3,798,453
<NUMBER-OF-SHARES-REDEEMED> (11,729,199)
<SHARES-REINVESTED> 363,257
<NET-CHANGE-IN-ASSETS> (490,311,613)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 8,511,656
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 8,487,275
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 19,569,441
<AVERAGE-NET-ASSETS> 1,135,730,294
<PER-SHARE-NAV-BEGIN> 14.24
<PER-SHARE-NII> (0.22)
<PER-SHARE-GAIN-APPREC> (2.44)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (0.13)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.45
<EXPENSE-RATIO> 2.13
<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> 013
<NAME> STATE STREET RESEARCH CAPITAL FUND CLASS S
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 835,318,523
<INVESTMENTS-AT-VALUE> 881,850,802
<RECEIVABLES> 14,807,379
<ASSETS-OTHER> 47,735
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 896,705,916
<PAYABLE-FOR-SECURITIES> 2,462,183
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 41,357,706
<TOTAL-LIABILITIES> 43,819,889
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 713,214,482
<SHARES-COMMON-STOCK> 9,304,490
<SHARES-COMMON-PRIOR> 12,682,096
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 93,139,266
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 46,532,279
<NET-ASSETS> 852,886,027
<DIVIDEND-INCOME> 3,465,656
<INTEREST-INCOME> 2,246,324
<OTHER-INCOME> 0
<EXPENSES-NET> 19,569,441
<NET-INVESTMENT-INCOME> (13,857,461)
<REALIZED-GAINS-CURRENT> 109,471,374
<APPREC-INCREASE-CURRENT> (302,805,063)
<NET-CHANGE-FROM-OPS> (207,191,150)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (1,541,241)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 4,001,288
<NUMBER-OF-SHARES-REDEEMED> (7,494,655)
<SHARES-REINVESTED> 115,761
<NET-CHANGE-IN-ASSETS> (490,311,613)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 8,511,656
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 8,487,275
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 19,569,441
<AVERAGE-NET-ASSETS> 1,135,730,294
<PER-SHARE-NAV-BEGIN> 14.96
<PER-SHARE-NII> (0.09)
<PER-SHARE-GAIN-APPREC> (2.58)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (0.13)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.16
<EXPENSE-RATIO> 1.14
<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> YEAR
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 835,318,523
<INVESTMENTS-AT-VALUE> 881,850,802
<RECEIVABLES> 14,807,379
<ASSETS-OTHER> 47,735
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 896,705,916
<PAYABLE-FOR-SECURITIES> 2,462,183
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 41,357,706
<TOTAL-LIABILITIES> 43,819,889
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 713,214,482
<SHARES-COMMON-STOCK> 4,814,806
<SHARES-COMMON-PRIOR> 8,418,494
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 93,139,266
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 46,532,279
<NET-ASSETS> 852,886,027
<DIVIDEND-INCOME> 3,465,656
<INTEREST-INCOME> 2,246,324
<OTHER-INCOME> 0
<EXPENSES-NET> 19,569,441
<NET-INVESTMENT-INCOME> (13,857,461)
<REALIZED-GAINS-CURRENT> 109,471,374
<APPREC-INCREASE-CURRENT> (302,805,063)
<NET-CHANGE-FROM-OPS> (207,191,150)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (889,094)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,281,510
<NUMBER-OF-SHARES-REDEEMED> (4,950,325)
<SHARES-REINVESTED> 65,127
<NET-CHANGE-IN-ASSETS> (490,311,613)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 8,511,656
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 8,487,275
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 19,569,441
<AVERAGE-NET-ASSETS> 1,135,730,294
<PER-SHARE-NAV-BEGIN> 14.26
<PER-SHARE-NII> (0.22)
<PER-SHARE-GAIN-APPREC> (2.44)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (0.13)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.47
<EXPENSE-RATIO> 2.13
<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> YEAR
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 110,703,146
<INVESTMENTS-AT-VALUE> 89,887,949
<RECEIVABLES> 3,529,282
<ASSETS-OTHER> 53,846
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 93,471,077
<PAYABLE-FOR-SECURITIES> 184,812
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 88,959,520
<TOTAL-LIABILITIES> 89,144,332
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 106,444,301
<SHARES-COMMON-STOCK> 3,484,170
<SHARES-COMMON-PRIOR> 2,218,121
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 3,515,228
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (20,815,197)
<NET-ASSETS> 89,144,332
<DIVIDEND-INCOME> 194,678
<INTEREST-INCOME> 745,382
<OTHER-INCOME> 0
<EXPENSES-NET> 1,850,846
<NET-INVESTMENT-INCOME> (910,786)
<REALIZED-GAINS-CURRENT> 6,291,426
<APPREC-INCREASE-CURRENT> (42,446,270)
<NET-CHANGE-FROM-OPS> (37,065,630)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (5,928,823)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,172,979
<NUMBER-OF-SHARES-REDEEMED> (1,369,043)
<SHARES-REINVESTED> 462,113
<NET-CHANGE-IN-ASSETS> (280,832)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 13,593,174
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 784,289
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,015,330
<AVERAGE-NET-ASSETS> 104,571,867
<PER-SHARE-NAV-BEGIN> 15.53
<PER-SHARE-NII> (0.05)
<PER-SHARE-GAIN-APPREC> (4.01)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (2.61)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.86
<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> YEAR
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 110,703,146
<INVESTMENTS-AT-VALUE> 89,887,949
<RECEIVABLES> 3,529,282
<ASSETS-OTHER> 53,846
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 93,471,077
<PAYABLE-FOR-SECURITIES> 184,812
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 88,959,520
<TOTAL-LIABILITIES> 89,144,332
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 106,444,301
<SHARES-COMMON-STOCK> 5,459,771
<SHARES-COMMON-PRIOR> 2,684,484
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 3,515,228
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (20,815,197)
<NET-ASSETS> 89,144,332
<DIVIDEND-INCOME> 194,678
<INTEREST-INCOME> 745,382
<OTHER-INCOME> 0
<EXPENSES-NET> 1,850,846
<NET-INVESTMENT-INCOME> (910,786)
<REALIZED-GAINS-CURRENT> 6,291,426
<APPREC-INCREASE-CURRENT> (42,446,270)
<NET-CHANGE-FROM-OPS> (37,065,630)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (7,729,321)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 3,332,103
<NUMBER-OF-SHARES-REDEEMED> (1,079,812)
<SHARES-REINVESTED> 522,996
<NET-CHANGE-IN-ASSETS> (280,832)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 13,593,174
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 784,289
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,015,330
<AVERAGE-NET-ASSETS> 104,571,867
<PER-SHARE-NAV-BEGIN> 15.09
<PER-SHARE-NII> (0.14)
<PER-SHARE-GAIN-APPREC> (3.86)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (2.61)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.48
<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> YEAR
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 110,703,146
<INVESTMENTS-AT-VALUE> 89,887,949
<RECEIVABLES> 3,529,282
<ASSETS-OTHER> 53,846
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 93,471,077
<PAYABLE-FOR-SECURITIES> 184,812
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 88,959,520
<TOTAL-LIABILITIES> 89,144,332
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 106,444,301
<SHARES-COMMON-STOCK> 549,656
<SHARES-COMMON-PRIOR> 445,503
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 3,515,228
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (20,815,197)
<NET-ASSETS> 89,144,332
<DIVIDEND-INCOME> 194,678
<INTEREST-INCOME> 745,382
<OTHER-INCOME> 0
<EXPENSES-NET> 1,850,846
<NET-INVESTMENT-INCOME> (910,786)
<REALIZED-GAINS-CURRENT> 6,291,426
<APPREC-INCREASE-CURRENT> (42,446,270)
<NET-CHANGE-FROM-OPS> (37,065,630)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (1,185,510)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 254,611
<NUMBER-OF-SHARES-REDEEMED> (249,446)
<SHARES-REINVESTED> 98,988
<NET-CHANGE-IN-ASSETS> (280,832)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 13,593,174
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 784,289
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,015,330
<AVERAGE-NET-ASSETS> 104,571,867
<PER-SHARE-NAV-BEGIN> 15.73
<PER-SHARE-NII> (0.02)
<PER-SHARE-GAIN-APPREC> (4.08)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (2.61)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.02
<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> YEAR
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 110,703,146
<INVESTMENTS-AT-VALUE> 89,887,949
<RECEIVABLES> 3,529,282
<ASSETS-OTHER> 53,846
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 93,471,077
<PAYABLE-FOR-SECURITIES> 184,812
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 88,959,520
<TOTAL-LIABILITIES> 89,144,332
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 106,444,301
<SHARES-COMMON-STOCK> 826,278
<SHARES-COMMON-PRIOR> 494,177
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 3,515,228
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (20,815,197)
<NET-ASSETS> 89,144,332
<DIVIDEND-INCOME> 194,678
<INTEREST-INCOME> 745,382
<OTHER-INCOME> 0
<EXPENSES-NET> 1,850,846
<NET-INVESTMENT-INCOME> (910,786)
<REALIZED-GAINS-CURRENT> 6,291,426
<APPREC-INCREASE-CURRENT> (42,446,270)
<NET-CHANGE-FROM-OPS> (37,065,630)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (1,418,848)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 712,013
<NUMBER-OF-SHARES-REDEEMED> (454,421)
<SHARES-REINVESTED> 74,509
<NET-CHANGE-IN-ASSETS> (280,832)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 13,593,174
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 784,289
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,015,330
<AVERAGE-NET-ASSETS> 104,571,867
<PER-SHARE-NAV-BEGIN> 15.10
<PER-SHARE-NII> (0.14)
<PER-SHARE-GAIN-APPREC> (3.86)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (2.61)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.49
<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> YEAR
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 485,194,206
<INVESTMENTS-AT-VALUE> 404,344,517
<RECEIVABLES> 1,079,885
<ASSETS-OTHER> 22,870
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 405,447,272
<PAYABLE-FOR-SECURITIES> 613,068
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 16,198,631
<TOTAL-LIABILITIES> 16,811,699
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 471,547,854
<SHARES-COMMON-STOCK> 7,494,241
<SHARES-COMMON-PRIOR> 7,621,324
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (2,062,592)
<ACCUM-APPREC-OR-DEPREC> (80,849,689)
<NET-ASSETS> 388,635,573
<DIVIDEND-INCOME> 4,606,325
<INTEREST-INCOME> 3,934,750
<OTHER-INCOME> 0
<EXPENSES-NET> 10,978,939
<NET-INVESTMENT-INCOME> (2,437,864)
<REALIZED-GAINS-CURRENT> 3,061,152
<APPREC-INCREASE-CURRENT> (140,139,832)
<NET-CHANGE-FROM-OPS> (139,516,544)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (2,244,173)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 5,381,653
<NUMBER-OF-SHARES-REDEEMED> (5,606,090)
<SHARES-REINVESTED> 97,354
<NET-CHANGE-IN-ASSETS> (86,819,039)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 4,156,803
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4,919,113
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 10,978,939
<AVERAGE-NET-ASSETS> 578,719,176
<PER-SHARE-NAV-BEGIN> 20.71
<PER-SHARE-NII> 0.02
<PER-SHARE-GAIN-APPREC> (5.03)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (0.23)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 15.47
<EXPENSE-RATIO> 1.39
<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> YEAR
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 485,194,206
<INVESTMENTS-AT-VALUE> 404,344,517
<RECEIVABLES> 1,079,885
<ASSETS-OTHER> 22,870
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 405,447,272
<PAYABLE-FOR-SECURITIES> 613,068
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 16,198,631
<TOTAL-LIABILITIES> 16,811,699
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 471,547,854
<SHARES-COMMON-STOCK> 13,959,855
<SHARES-COMMON-PRIOR> 11,606,420
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (2,062,592)
<ACCUM-APPREC-OR-DEPREC> (80,849,689)
<NET-ASSETS> 388,635,573
<DIVIDEND-INCOME> 4,606,325
<INTEREST-INCOME> 3,934,750
<OTHER-INCOME> 0
<EXPENSES-NET> 10,978,939
<NET-INVESTMENT-INCOME> (2,437,864)
<REALIZED-GAINS-CURRENT> 3,061,152
<APPREC-INCREASE-CURRENT> (140,139,832)
<NET-CHANGE-FROM-OPS> (139,516,544)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (3,454,508)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 5,637,518
<NUMBER-OF-SHARES-REDEEMED> (3,403,166)
<SHARES-REINVESTED> 119,083
<NET-CHANGE-IN-ASSETS> (86,819,039)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 4,156,803
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4,919,113
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 10,978,939
<AVERAGE-NET-ASSETS> 578,719,176
<PER-SHARE-NAV-BEGIN> 20.33
<PER-SHARE-NII> (0.13)
<PER-SHARE-GAIN-APPREC> (4.90)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (0.23)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 15.07
<EXPENSE-RATIO> 2.15
<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> 033
<NAME> STATE STREET RESEARCH AURORA FUND CLASS S
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 485,194,206
<INVESTMENTS-AT-VALUE> 404,344,517
<RECEIVABLES> 1,079,885
<ASSETS-OTHER> 22,870
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 405,447,272
<PAYABLE-FOR-SECURITIES> 613,068
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 16,198,631
<TOTAL-LIABILITIES> 16,811,699
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 471,547,854
<SHARES-COMMON-STOCK> 48,090
<SHARES-COMMON-PRIOR> 697,968
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (2,062,592)
<ACCUM-APPREC-OR-DEPREC> (80,849,689)
<NET-ASSETS> 388,635,573
<DIVIDEND-INCOME> 4,606,325
<INTEREST-INCOME> 3,934,750
<OTHER-INCOME> 0
<EXPENSES-NET> 10,978,939
<NET-INVESTMENT-INCOME> (2,437,864)
<REALIZED-GAINS-CURRENT> 3,061,152
<APPREC-INCREASE-CURRENT> (140,139,832)
<NET-CHANGE-FROM-OPS> (139,516,544)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (107,482)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 9,023
<NUMBER-OF-SHARES-REDEEMED> (664,232)
<SHARES-REINVESTED> 5,331
<NET-CHANGE-IN-ASSETS> (86,819,039)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 4,156,803
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4,919,113
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 10,978,939
<AVERAGE-NET-ASSETS> 578,719,176
<PER-SHARE-NAV-BEGIN> 20.83
<PER-SHARE-NII> 0.10
<PER-SHARE-GAIN-APPREC> (5.10)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (0.23)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 15.60
<EXPENSE-RATIO> 1.04
<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> 034
<NAME> STATE STREET RESEARCH AURORA FUND CLASS C
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 485,194,206
<INVESTMENTS-AT-VALUE> 404,344,517
<RECEIVABLES> 1,079,885
<ASSETS-OTHER> 22,870
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 405,447,272
<PAYABLE-FOR-SECURITIES> 613,068
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 16,198,631
<TOTAL-LIABILITIES> 16,811,699
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 471,547,854
<SHARES-COMMON-STOCK> 4,082,629
<SHARES-COMMON-PRIOR> 3,302,603
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (2,062,592)
<ACCUM-APPREC-OR-DEPREC> (80,849,689)
<NET-ASSETS> 388,635,573
<DIVIDEND-INCOME> 4,606,325
<INTEREST-INCOME> 3,934,750
<OTHER-INCOME> 0
<EXPENSES-NET> 10,978,939
<NET-INVESTMENT-INCOME> (2,437,864)
<REALIZED-GAINS-CURRENT> 3,061,152
<APPREC-INCREASE-CURRENT> (140,139,832)
<NET-CHANGE-FROM-OPS> (139,516,544)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (1,036,520)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,088,859
<NUMBER-OF-SHARES-REDEEMED> (1,340,390)
<SHARES-REINVESTED> 31,557
<NET-CHANGE-IN-ASSETS> (86,819,039)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 4,156,803
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4,919,113
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 10,978,939
<AVERAGE-NET-ASSETS> 578,719,176
<PER-SHARE-NAV-BEGIN> 20.32
<PER-SHARE-NII> (0.13)
<PER-SHARE-GAIN-APPREC> (4.90)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (0.23)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 15.06
<EXPENSE-RATIO> 2.15
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
