<PAGE> PAGE 1
000 A000000 06/30/1999
000 C000000 0000049975
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 CIGNA INVESTMENT SECURITIES, INC.
001 B000000 811-2299
001 C000000 8607263700
002 A000000 P. O. BOX 13856
002 B000000 PHILADELPHIA
002 C000000 PA
002 D010000 19192
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
007 C010100 1
007 C010200 2
007 C010300 3
007 C010400 4
007 C010500 5
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
008 A000001 CIGNA INVESTMENTS,INC
008 B000001 A
008 C000001 801-18094
008 D010001 HARTFORD
008 D020001 CT
008 D030001 06152
008 D040001 2217
012 A000001 STATE STREET BANK & TRUST COMPANY
012 B000001 84-00896
012 C010001 BOSTON
012 C020001 MA
012 C030001 02266
013 A000001 PRICE WATERHOUSECOOPERS
013 B010001 BOSTON
013 B020001 MA
013 B030001 02110
015 A000001 STATE STREET BANK AND TRUST COMPANY
015 B000001 C
015 C010001 BOSTON
<PAGE> PAGE 2
015 C020001 MA
015 C030001 02266
015 E010001 X
018 000000 Y
019 A000000 N
019 B000000 0
020 C000001 0
020 C000002 0
020 C000003 0
020 C000004 0
020 C000005 0
020 C000006 0
020 C000007 0
020 C000008 0
020 C000009 0
020 C000010 0
021 000000 0
022 A000001 EXXON CORP.
022 B000001 13-5409005
022 C000001 76966
022 D000001 0
022 A000002 HOUSEHOLD FINANCE CORP.
022 B000002 36-1239445
022 C000002 47517
022 D000002 0
022 A000003 ASSOC. CORP. OF N.A.
022 B000003 74-1494554
022 C000003 27310
022 D000003 0
022 A000004 SALOMON SMITH BARNEY
022 B000004 11-2418191
022 C000004 8924
022 D000004 8355
022 A000005 CIT GROUP HOLDING, INC.
022 B000005 13-2994534
022 C000005 16195
022 D000005 0
022 A000006 BEAR STERNS CO.
022 B000006 13-3299429
022 C000006 6356
022 D000006 7055
022 A000007 GENERAL ELECTRIC CAPITAL CORP.
022 B000007 13-1500700
022 C000007 8520
022 D000007 0
022 A000008 AMERICAN EXPRESS CREDIT CORP.
022 B000008 11-1988350
022 C000008 6114
022 D000008 0
022 A000009 GENERAL MOTORS ACCEPT. CORP.
022 B000009 38-0572512
<PAGE> PAGE 3
022 C000009 5672
022 D000009 0
022 A000010 DONALDSON LUFKIN JENRETT
022 B000010 13-2741729
022 C000010 3060
022 D000010 0
023 C000000 206634
023 D000000 15410
024 000000 Y
025 A000001 MERRILL LYNCH, PIERCE, FENNER & SMITH
025 B000001 13-5674085
025 C000001 D
025 D000001 818
025 A000002 DELETE
025 D000002 0
025 D000003 0
025 D000004 0
025 D000005 0
025 D000006 0
025 D000007 0
025 D000008 0
026 A000000 N
026 B000000 Y
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 N
028 A010000 0
028 A020000 0
028 A030000 0
028 A040000 0
028 B010000 0
028 B020000 0
028 B030000 0
028 B040000 0
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028 C030000 0
028 C040000 0
028 D010000 0
028 D020000 0
028 D030000 0
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028 E010000 0
028 E020000 0
028 E030000 0
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<PAGE> PAGE 4
028 F010000 0
028 F020000 0
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028 G020000 0
028 G030000 0
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045 000000 Y
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048 A010000 75000
048 A020000 0.550
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048 I010000 0
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048 J020000 0.000
048 K010000 75000
048 K020000 0.400
049 000000 N
050 000000 N
051 000000 N
052 000000 N
053 A000000 N
054 A000000 Y
054 B000000 Y
054 C000000 N
054 D000000 N
054 E000000 N
054 F000000 N
054 G000000 Y
054 H000000 Y
054 I000000 N
054 J000000 Y
054 K000000 N
<PAGE> PAGE 5
054 L000000 N
054 M000000 Y
054 N000000 N
054 O000000 N
055 A000000 N
055 B000000 N
056 000000 Y
057 000000 N
058 A000000 N
059 000000 Y
060 A000000 Y
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062 M000000 11.7
062 N000000 3.1
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062 Q000000 0.0
062 R000000 0.0
063 A000000 0
063 B000000 12.3
064 A000000 N
064 B000000 N
066 A000000 N
067 000000 N
068 A000000 N
068 B000000 N
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070 A010000 Y
070 A020000 N
070 B010000 N
070 B020000 N
070 C010000 N
070 C020000 N
070 D010000 N
070 D020000 N
070 E010000 N
070 E020000 N
070 F010000 N
<PAGE> PAGE 6
070 F020000 N
070 G010000 N
070 G020000 N
070 H010000 N
070 H020000 N
070 I010000 N
070 I020000 N
070 J010000 Y
070 J020000 Y
070 K010000 Y
070 K020000 Y
070 L010000 Y
070 L020000 Y
070 M010000 N
070 M020000 N
070 N010000 Y
070 N020000 N
070 O010000 Y
070 O020000 N
070 P010000 N
070 P020000 N
070 Q010000 N
070 Q020000 N
070 R010000 N
070 R020000 N
071 A000000 25396
071 B000000 25843
071 C000000 87854
071 D000000 29
072 A000000 6
072 B000000 3242
072 C000000 0
072 D000000 0
072 E000000 0
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072 H000000 0
072 I000000 40
072 J000000 43
072 K000000 0
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072 M000000 14
072 N000000 0
072 O000000 12
072 P000000 0
072 Q000000 0
072 R000000 19
072 S000000 1
072 T000000 0
072 U000000 0
072 V000000 0
<PAGE> PAGE 7
072 W000000 38
072 X000000 402
072 Y000000 0
072 Z000000 2840
072AA000000 319
072BB000000 319
072CC010000 0
072CC020000 4165
072DD010000 2681
072DD020000 0
072EE000000 0
073 A010000 0.5600
073 A020000 0.0000
073 B000000 0.0000
073 C000000 0.0000
074 A000000 0
074 B000000 0
074 C000000 2107
074 D000000 84527
074 E000000 0
074 F000000 0
074 G000000 0
074 H000000 0
074 I000000 0
074 J000000 0
074 K000000 0
074 L000000 1895
074 M000000 0
074 N000000 88529
074 O000000 0
074 P000000 253
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 0
074 R040000 80
074 S000000 0
074 T000000 88196
074 U010000 4792
074 U020000 0
074 V010000 18.40
074 V020000 0.00
074 W000000 0.0000
074 X000000 11217
074 Y000000 0
075 A000000 0
075 B000000 90435
076 000000 15.63
077 A000000 N
078 000000 N
080 A000000 LLOYDS OF LONDON
<PAGE> PAGE 8
080 C000000 10000
081 A000000 Y
081 B000000 8
082 A000000 N
082 B000000 0
083 A000000 N
083 B000000 0
084 A000000 N
084 B000000 0
085 A000000 Y
085 B000000 N
086 A010000 0
086 A020000 0
086 B010000 0
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086 C010000 0
086 C020000 0
086 D010000 0
086 D020000 0
086 E010000 0
086 E020000 0
086 F010000 0
086 F020000 0
087 A010000 COMMON STOCK
087 A020000 449764109
087 A030000 IIS
088 A000000 N
088 B000000 N
088 C000000 N
088 D000000 N
SIGNATURE ALFRED A. BINGHAM III
TITLE TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
SEMI-ANNUAL REPORT FOR THE PERIOD ENDED JUNE 30, 1999 AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1999
<PERIOD-END> JUN-30-1999
<INVESTMENTS-AT-COST> 88,550
<INVESTMENTS-AT-VALUE> 86,634
<RECEIVABLES> 1,703
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 192
<TOTAL-ASSETS> 88,529
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 333
<TOTAL-LIABILITIES> 333
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 89,877
<SHARES-COMMON-STOCK> 4,792
<SHARES-COMMON-PRIOR> 4,792
<ACCUMULATED-NII-CURRENT> 104
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 131
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (1,916)
<NET-ASSETS> 88,196
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 3,242
<OTHER-INCOME> 0
<EXPENSES-NET> 402
<NET-INVESTMENT-INCOME> 2,840
<REALIZED-GAINS-CURRENT> 0
<APPREC-INCREASE-CURRENT> (4,165)
<NET-CHANGE-FROM-OPS> (1,325)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 2,681
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 0
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> (4,006)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 131
<OVERDISTRIB-NII-PRIOR> 54
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 235
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 402
<AVERAGE-NET-ASSETS> 90,435
<PER-SHARE-NAV-BEGIN> 19.24
<PER-SHARE-NII> 0.59
<PER-SHARE-GAIN-APPREC> (0.87)
<PER-SHARE-DIVIDEND> 0.56
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 18.40
<EXPENSE-RATIO> 0.88
</TABLE>
