SALOMON BROTHERS SERIES FUNDS INC
NSAR-B, 2000-03-14
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<PAGE>      PAGE  1
000 B000000 12/31/1999
000 C000000 0000862502
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 SALOMON BROTHERS SERIES FUNDS INC
001 B000000 811-06087
001 C000000 8007256666
002 A000000 7 WORLD TRADE CENTER
002 B000000 NEW YORK
002 C000000 NY
002 D010000 10048
003  000000 N
004  000000 N
005  000000 N
006  000000 N
007 A000000 Y
007 B000000 12
007 C010100  1
007 C020100 SALOMON BROTHERS CASH MANAGEMENT FUND
007 C030100 N
007 C010200  2
007 C020200 SALOMON BROTHERS NY MUNICIPAL MONEY MARKET FD
007 C030200 N
007 C010300  3
007 C020300 SALOMON BROTHERS INSTITUTIONAL MONEY MARKET
007 C030300 N
007 C010400  4
007 C010500  5
007 C020500 SALOMON BROTHERS NATL INTERMEDIATE MUNI FUND
007 C030500 N
007 C010600  6
007 C020600 SALOMON BROTHERS U.S. GOVERNMENT INCOME FUND
007 C030600 N
007 C010700  7
007 C020700 SALOMON BROTHERS HIGH YIELD BOND FUND
007 C030700 N
007 C010800  8
007 C020800 SALOMON BROTHERS STRATEGIC BOND FUND
007 C030800 N
007 C010900  9
007 C020900 SALOMON BROTHERS TOTAL RETURN FUND
007 C030900 N
007 C011000 10
007 C021000 SALOMON BROTHERS ASIA GROWTH FUND
007 C031000 N
007 C011100 11
<PAGE>      PAGE  2
007 C021100 SALOMON BROTHERS SMALL CAP GROWTH FUND
007 C031100 N
007 C011200 12
007 C021200 SALOMON BROTHERS LARGE CAP GROWTH FUND
007 C031200 N
007 C011300 13
007 C021300 SALOMON BROTHERS INTERNATIONAL EQUITY FUND
007 C031300 N
007 C011400 14
007 C011500 15
007 C011600 16
007 C011700 17
007 C011800 18
007 C011900 19
007 C012000 20
007 C012100 21
007 C012200 22
007 C012300 23
007 C012400 24
007 C012500 25
007 C012600 26
007 C012700 27
007 C012800 28
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007 C013200 32
007 C013300 33
007 C013400 34
007 C013500 35
007 C013600 36
007 C013700 37
007 C013800 38
007 C013900 39
007 C014000 40
010 A00AA01 SSBC FUND MANAGEMENT INC.
010 B00AA01 85-0000000
010 C01AA01 NEW YORK
010 C02AA01 NY
010 C03AA01 10013
011 A00AA01 SALOMON SMITH BARNEY INC.
011 B00AA01 8-00000000
011 C01AA01 NEW YORK
011 C02AA01 NY
011 C03AA01 10013
012 A00AA01 FIRST DATA INVESTOR SERVICES GROUP, INC.
012 B00AA01 84-01761
012 C01AA01 WESTBOROUGH
012 C02AA01 MA
012 C03AA01 01581
012 C04AA01 5127
<PAGE>      PAGE  3
013 A00AA01 PRICEWATERHOUSECOOPERS LLP
013 B01AA01 NEW YORK
013 B02AA01 NY
013 B03AA01 10036
014 A00AA01 SALOMON SMITH BARNEY INC.
014 B00AA01 8-00000000
014 A00AA02 ROBINSON HUMPHREY
014 B00AA02 8-0000000
014 A00AA03 DELETE
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020 B000001 13-2518466
020 C000001    101
020 A000002 JARDINE FLEMING
020 B000002 N/A
020 C000002     74
020 A000003 LEHMAN BROTHERS
020 B000003 13-2518466
020 C000003     64
020 A000004 NOMURA
020 B000004 13-2642206
020 C000004     47
020 A000005 MORGAN STANLEY
020 B000005 13-2655998
020 C000005     43
020 A000006 DONALDSON
020 B000006 13-2741729
020 C000006     34
020 A000007 INSTINET
020 B000007 13-3443395
020 C000007     29
020 A000008 CREDIT LYONNAIS
020 B000008 N/A
020 C000008     27
020 A000009 WI CARR
020 B000009 13-2638166
020 C000009     26
020 A000010 HOENIG
020 B000010 N/A
020 C000010     17
021  000000      462
022 A000001 STATE STREET BANK AND TRUST COMPANY
022 B000001 04-1867445
022 C000001  13510750
022 D000001         0
022 A000002 UBS AG WARBURG DILLION READ
022 B000002 N/A
022 C000002   1579052
022 D000002     25653
022 A000003 JP MORGAN SECURITIES
022 B000003 13-3224016
022 C000003    676484
<PAGE>      PAGE  4
022 D000003    138654
022 A000004 GOLDMAN SACHS
022 B000004 13-5108880
022 C000004    332806
022 D000004    104161
022 A000005 BEAR STEARNS
022 B000005 13-3299429
022 C000005    199247
022 D000005    176047
022 A000006 DONALDSON LUFKIN JENRETTE
022 B000006 13-2741729
022 C000006    116391
022 D000006    130201
022 A000007 NOMURA SECURITIES INTERNATIONAL INC.
022 B000007 13-2642206
022 C000007    126124
022 D000007    118588
022 A000008 LEHMAN BROTHERS
022 B000008 13-2518466
022 C000008    112998
022 D000008     84082
022 A000009 CHASE SECURITIES
022 B000009 13-3112953
022 C000009     80042
022 D000009     68263
022 A000010 MORGAN STANLEY & CO.
022 B000010 13-2655998
022 C000010     93190
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<PAGE>      PAGE  5
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008 A000101 SALOMON BROTHERS ASSET MANAGEMENT
008 B000101 A
008 C000101 801-32046
008 D010101 NEW YORK
008 D020101 NY
008 D030101 10048
015 A000101 INVESTORS BANK & TRUST COMPANY
015 B000101 C
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015 C020101 MA
015 C030101 02116
015 E010101 X
<PAGE>      PAGE  6
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<PAGE>      PAGE  7
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<PAGE>      PAGE  8
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<PAGE>      PAGE  9
070 M020100 N
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<PAGE>      PAGE  10
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008 A000201 SALOMON BROTHERS ASSET MANAGEMENT INC
008 B000201 A
008 C000201 801-32046
008 D010201 NEW YORK
008 D020201 NY
008 D030201 10048
015 A000201 INVESTORS BANK & TRUST COMPANY
015 B000201 C
015 C010201 BOSTON
015 C020201 MA
015 C030201 02116
015 E010201 X
018  000200 Y
019 A000200 Y
019 B000200   11
019 C000200 SALOMONFDS
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<PAGE>      PAGE  11
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<PAGE>      PAGE  12
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<PAGE>      PAGE  13
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<PAGE>      PAGE  14
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<PAGE>      PAGE  15
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008 A000301 SALOMON BROTHERS ASSET MANAGEMENT INC
008 B000301 A
008 C000301 801-32046
008 D010301 NEW YORK
008 D020301 NY
008 D030301 10048
015 A000301 INVESTORS BANK & TRUST COMPANY
015 B000301 C
015 C010301 BOSTON
015 C020301 MA
015 C030301 02116
015 E010301 X
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<PAGE>      PAGE  16
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<PAGE>      PAGE  17
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<PAGE>      PAGE  18
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<PAGE>      PAGE  19
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<PAGE>      PAGE  20
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<PAGE>      PAGE  21
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<PAGE>      PAGE  23
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<PAGE>      PAGE  25
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<PAGE>      PAGE  26
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<PAGE>      PAGE  27
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<PAGE>      PAGE  28
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<PAGE>      PAGE  32
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<PAGE>      PAGE  33
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<PAGE>      PAGE  35
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<PAGE>      PAGE  36
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<PAGE>      PAGE  37
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<PAGE>      PAGE  38
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<PAGE>      PAGE  39
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<PAGE>      PAGE  40
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<PAGE>      PAGE  41
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<PAGE>      PAGE  42
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<PAGE>      PAGE  43
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070 G020800 N
070 H010800 N
070 H020800 N
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<PAGE>      PAGE  44
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<PAGE>      PAGE  45
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<PAGE>      PAGE  46
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<PAGE>      PAGE  47
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<PAGE>      PAGE  48
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<PAGE>      PAGE  49
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<PAGE>      PAGE  50
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<PAGE>      PAGE  51
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<PAGE>      PAGE  52
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<PAGE>      PAGE  53
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<PAGE>      PAGE  54
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<PAGE>      PAGE  55
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008 A001101 SALOMON BROTHERS ASSET MANAGEMENT
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<PAGE>      PAGE  56
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015 A001101 PNC BANK
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028 D011100      9414
028 D021100         0
028 D031100         0
028 D041100      9627
028 E011100     15724
028 E021100     14807
028 E031100         0
028 E041100     20173
028 F011100      8487
028 F021100         0
028 F031100         0
028 F041100     10562
028 G011100    293556
028 G021100     14807
028 G031100         0
028 G041100     71348
028 H001100     56022
029  001100 Y
030 A001100    168
030 B001100  5.75
030 C001100  0.00
031 A001100    168
031 B001100      0
032  001100      0
033  001100      0
034  001100 Y
035  001100   1525
<PAGE>      PAGE  57
036 A001100 N
036 B001100      0
037  001100 Y
038  001100      0
039  001100 N
040  001100 Y
041  001100 N
042 A001100   0
042 B001100   0
042 C001100   0
042 D001100   0
042 E001100   0
042 F001100   0
042 G001100   0
042 H001100   0
043  001100      0
044  001100    723
045  001100 Y
046  001100 N
047  001100 Y
048  001100  0.800
048 A011100        0
048 A021100 0.000
048 B011100        0
048 B021100 0.000
048 C011100        0
048 C021100 0.000
048 D011100        0
048 D021100 0.000
048 E011100        0
048 E021100 0.000
048 F011100        0
048 F021100 0.000
048 G011100        0
048 G021100 0.000
048 H011100        0
048 H021100 0.000
048 I011100        0
048 I021100 0.000
048 J011100        0
048 J021100 0.000
048 K011100        0
048 K021100 0.000
049  001100 N
050  001100 N
051  001100 N
052  001100 N
053 A001100 Y
053 B001100 Y
055 A001100 N
055 B001100 N
<PAGE>      PAGE  58
056  001100 Y
057  001100 N
058 A001100 N
059  001100 Y
060 A001100 Y
060 B001100 Y
061  001100      500
062 A001100 N
062 B001100   0.0
062 C001100   0.0
062 D001100   0.0
062 E001100   0.0
062 F001100   0.0
062 G001100   0.0
062 H001100   0.0
062 I001100   0.0
062 J001100   0.0
062 K001100   0.0
062 L001100   0.0
062 M001100   0.0
062 N001100   0.0
062 O001100   0.0
062 P001100   0.0
062 Q001100   0.0
062 R001100   0.0
063 A001100   0
063 B001100  0.0
066 A001100 Y
066 B001100 N
066 C001100 Y
066 D001100 N
066 E001100 N
066 F001100 N
066 G001100 N
067  001100 N
068 A001100 N
068 B001100 N
069  001100 N
070 A011100 Y
070 A021100 Y
070 B011100 Y
070 B021100 N
070 C011100 Y
070 C021100 N
070 D011100 Y
070 D021100 N
070 E011100 N
070 E021100 N
070 F011100 Y
070 F021100 N
070 G011100 Y
<PAGE>      PAGE  59
070 G021100 N
070 H011100 Y
070 H021100 N
070 I011100 N
070 I021100 N
070 J011100 Y
070 J021100 N
070 K011100 Y
070 K021100 Y
070 L011100 Y
070 L021100 N
070 M011100 Y
070 M021100 N
070 N011100 Y
070 N021100 N
070 O011100 Y
070 O021100 N
070 P011100 N
070 P021100 N
070 Q011100 Y
070 Q021100 N
070 R011100 N
070 R021100 N
071 A001100    168092
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071 C001100    118636
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072 A001100 12
072 B001100      828
072 C001100      229
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072 F001100      975
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072 H001100        0
072 I001100      193
072 J001100        7
072 K001100        0
072 L001100       64
072 M001100        3
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072 P001100        0
072 Q001100        0
072 R001100       51
072 S001100        0
072 T001100      723
072 U001100        0
072 V001100        0
072 W001100        7
072 X001100     2130
<PAGE>      PAGE  60
072 Y001100       42
072 Z001100    -1031
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072CC011100    11271
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073 A011100   0.0000
073 A021100   0.0000
073 B001100   0.9200
073 C001100   0.0000
074 A001100        0
074 B001100    41277
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074 D001100        0
074 E001100        0
074 F001100   270144
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074 O001100     3009
074 P001100      257
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074 R011100        0
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074 U021100     8164
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074 V021100    51.34
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074 X001100    28319
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008 A001201 CITIBANK, N.A.
008 B001201 S
008 C001201 801-000000
008 D011201 NEW YORK
008 D021201 NY
<PAGE>      PAGE  61
008 D031201 10005
008 A001202 SALOMON SMITH ARNEY
008 B001202 A
008 C001202 801-000000
008 D011202 NEW YORK
008 D021202 NY
008 D031202 10048
015 A001201 PNC BANK
015 B001201 C
015 C011201 LESTER
015 C021201 PA
015 C031201 19113
015 E011201 X
018  001200 Y
019 A001200 Y
019 B001200   13
019 C001200 SALOMONFDS
028 A011200         0
028 A021200         0
028 A031200         0
028 A041200         0
028 B011200         0
028 B021200         0
028 B031200         0
028 B041200         0
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028 C021200         0
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028 E031200         0
028 E041200        28
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028 F031200         0
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028 G011200     10678
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028 G041200        35
028 H001200      8964
029  001200 Y
030 A001200      2
030 B001200  5.75
030 C001200  0.00
031 A001200      2
<PAGE>      PAGE  62
031 B001200      0
032  001200      0
033  001200      0
034  001200 Y
035  001200      0
036 A001200 Y
036 B001200      0
037  001200 N
038  001200      0
039  001200 N
040  001200 Y
041  001200 Y
042 A001200   0
042 B001200   0
042 C001200   0
042 D001200 100
042 E001200   0
042 F001200   0
042 G001200   0
042 H001200   0
043  001200      8
044  001200      0
045  001200 Y
046  001200 N
047  001200 Y
048  001200  0.750
048 A011200        0
048 A021200 0.000
048 B011200        0
048 B021200 0.000
048 C011200        0
048 C021200 0.000
048 D011200        0
048 D021200 0.000
048 E011200        0
048 E021200 0.000
048 F011200        0
048 F021200 0.000
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048 G021200 0.000
048 H011200        0
048 H021200 0.000
048 I011200        0
048 I021200 0.000
048 J011200        0
048 J021200 0.000
048 K011200        0
048 K021200 0.000
061  001200        0
062 A001200 N
062 B001200   0.0
<PAGE>      PAGE  63
062 C001200   0.0
062 D001200   0.0
062 E001200   0.0
062 F001200   0.0
062 G001200   0.0
062 H001200   0.0
062 I001200   0.0
062 J001200   0.0
062 K001200   0.0
062 L001200   0.0
062 M001200   0.0
062 N001200   0.0
062 O001200   0.0
062 P001200   0.0
062 Q001200   0.0
062 R001200   0.0
063 A001200   0
063 B001200  0.0
066 A001200 Y
066 D001200 Y
067  001200 N
068 A001200 N
068 B001200 N
069  001200 N
070 A011200 Y
070 A021200 N
070 B011200 Y
070 B021200 N
070 C011200 Y
070 C021200 N
070 D011200 Y
070 D021200 N
070 E011200 Y
070 E021200 N
070 F011200 Y
070 F021200 N
070 G011200 Y
070 G021200 N
070 H011200 Y
070 H021200 N
070 I011200 Y
070 I021200 N
070 J011200 Y
070 J021200 N
070 K011200 Y
070 K021200 N
070 L011200 Y
070 L021200 N
070 M011200 Y
070 M021200 N
070 N011200 Y
<PAGE>      PAGE  64
070 N021200 N
070 O011200 Y
070 O021200 N
070 P011200 N
070 P021200 N
070 Q011200 Y
070 Q021200 N
070 R011200 N
070 R021200 N
071 A001200     10838
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071 C001200      7499
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072 B001200        5
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072 E001200        0
072 F001200       10
072 G001200        1
072 H001200        0
072 I001200        4
072 J001200        3
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072 L001200        0
072 M001200        0
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072 P001200        0
072 Q001200        0
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072 T001200        8
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072 V001200        8
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072 Y001200       35
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072AA001200       32
072BB001200        0
072CC011200      799
072CC021200        0
072DD011200        0
072DD021200        0
072EE001200        0
073 A011200   0.0000
073 A021200   0.0000
073 B001200   0.0000
073 C001200   0.0000
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<PAGE>      PAGE  65
074 B001200        0
074 C001200        0
074 D001200        0
074 E001200        0
074 F001200    10921
074 G001200        0
074 H001200        0
074 I001200        0
074 J001200        0
074 K001200       35
074 L001200      422
074 M001200        0
074 N001200    11518
074 O001200        0
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074 Q001200        0
074 R011200        0
074 R021200        0
074 R031200        0
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074 V021200    33.51
074 W001200   0.0000
074 X001200        1
074 Y001200        0
075 A001200    11435
075 B001200        0
076  001200     0.00
008 A001301 SALOMON BROTHERS ASSET MANAGEMENT INC.
008 B001301 A
008 C001301 801-000000
008 D011301 NEW YORK
008 D021301 NY
008 D031301 10048
015 A001301 PNC BANK
015 B001301 C
015 C011301 LESTER
015 C021301 PA
015 C031301 19113
015 E011301 X
018  001300 Y
019 A001300 Y
019 B001300   13
019 C001300 SALOMONFDS
028 A011300         0
028 A021300         0
028 A031300         0
<PAGE>      PAGE  66
028 A041300         0
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028 C021300         0
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028 H001300      7562
029  001300 Y
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030 B001300  5.75
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031 A001300      0
031 B001300      0
032  001300      0
033  001300      0
037  001300 N
038  001300      0
039  001300 N
040  001300 Y
041  001300 Y
042 A001300   0
042 B001300   0
042 C001300   0
042 D001300   0
042 E001300   0
042 F001300   0
042 G001300   0
042 H001300   0
043  001300      0
044  001300      0
045  001300 Y
046  001300 N
<PAGE>      PAGE  67
047  001300 Y
048  001300  0.900
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048 I021300 0.000
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061  001300        0
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062 P001300   0.0
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063 B001300  0.0
066 A001300 Y
066 B001300 N
066 C001300 Y
066 D001300 N
066 E001300 N
066 F001300 N
<PAGE>      PAGE  68
066 G001300 N
067  001300 N
068 A001300 N
068 B001300 Y
069  001300 N
070 A011300 Y
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070 C021300 N
070 D011300 Y
070 D021300 N
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070 E021300 N
070 F011300 Y
070 F021300 N
070 G011300 Y
070 G021300 N
070 H011300 Y
070 H021300 N
070 I011300 Y
070 I021300 N
070 J011300 Y
070 J021300 N
070 K011300 Y
070 K021300 N
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070 L021300 Y
070 M011300 Y
070 M021300 Y
070 N011300 Y
070 N021300 N
070 O011300 Y
070 O021300 N
070 P011300 Y
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070 Q011300 Y
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<PAGE>      PAGE  69
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073 A021300   0.0000
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074 D001300        0
074 E001300        0
074 F001300     8329
074 G001300        0
074 H001300        0
074 I001300        0
074 J001300        0
074 K001300       22
074 L001300      170
074 M001300        0
074 N001300    10147
074 O001300        0
074 P001300        1
074 Q001300        0
074 R011300        0
074 R021300        0
074 R031300        0
<PAGE>      PAGE  70
074 R041300       42
074 S001300        0
074 T001300    10104
074 U011300      303
074 U021300      607
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074 V021300    37.42
074 W001300   0.0000
074 X001300      693
074 Y001300        0
075 A001300        0
075 B001300     6856
076  001300     0.00
062 A002100 N
062 B002100   0.0
062 C002100   0.0
062 D002100   0.0
062 E002100   0.0
062 F002100   0.0
062 G002100   0.0
062 H002100   0.0
062 I002100   0.0
062 J002100   0.0
062 K002100   0.0
062 L002100   0.0
062 M002100   0.0
062 N002100   0.0
062 O002100   0.0
062 P002100   0.0
062 Q002100   0.0
062 R002100   0.0
SIGNATURE   ANTHONY PACE
TITLE       CONTROLLER


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

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS ASIA GROWTH FUND - CLASS 2
<SERIES>
   <NUMBER> 010
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
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<INVESTMENTS-AT-VALUE>                      23,273,537
<RECEIVABLES>                                   45,794
<ASSETS-OTHER>                                 224,576
<OTHER-ITEMS-ASSETS>                                 0
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<OTHER-ITEMS-LIABILITIES>                      207,732
<TOTAL-LIABILITIES>                            207,732
<SENIOR-EQUITY>                                      0
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<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                    (4,718,355)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     7,195,277
<NET-ASSETS>                                 2,333,175
<DIVIDEND-INCOME>                              196,652
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<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 273,019
<NET-INVESTMENT-INCOME>                       (71,025)
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<APPREC-INCREASE-CURRENT>                    6,484,841
<NET-CHANGE-FROM-OPS>                       11,541,461
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        147,895
<NUMBER-OF-SHARES-REDEEMED>                    164,067
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                      10,050,820
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<ACCUMULATED-GAINS-PRIOR>                  (9,858,211)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
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<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                498,660
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<PER-SHARE-NAV-BEGIN>                             6.42
<PER-SHARE-NII>                                 (0.06)
<PER-SHARE-GAIN-APPREC>                           6.05
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<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              12.41
<EXPENSE-RATIO>                                   1.99


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS ASIA GROWTH FUND - CLASS A
<SERIES>
   <NUMBER> 010
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                       15,995,792
<INVESTMENTS-AT-VALUE>                      23,273,537
<RECEIVABLES>                                   45,794
<ASSETS-OTHER>                                 224,576
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              23,543,907
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      207,732
<TOTAL-LIABILITIES>                            207,732
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    20,859,253
<SHARES-COMMON-STOCK>                          561,134
<SHARES-COMMON-PRIOR>                          674,096
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                    (4,718,355)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     7,195,277
<NET-ASSETS>                                 2,333,175
<DIVIDEND-INCOME>                              196,652
<INTEREST-INCOME>                                5,042
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<NET-INVESTMENT-INCOME>                       (71,025)
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<APPREC-INCREASE-CURRENT>                    6,484,841
<NET-CHANGE-FROM-OPS>                       11,541,461
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        820,575
<NUMBER-OF-SHARES-REDEEMED>                    933,537
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                      10,050,820
<ACCUMULATED-NII-PRIOR>                       (48,614)
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<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          141,638
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                498,660
<AVERAGE-NET-ASSETS>                         5,157,698
<PER-SHARE-NAV-BEGIN>                             6.50
<PER-SHARE-NII>                                   0.00
<PER-SHARE-GAIN-APPREC>                           6.17
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              12.67
<EXPENSE-RATIO>                                   1.24


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS ASIA GROWTH FUND - CLASS B
<SERIES>
   <NUMBER> 010
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                       15,995,792
<INVESTMENTS-AT-VALUE>                      23,273,537
<RECEIVABLES>                                   45,794
<ASSETS-OTHER>                                 224,576
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              23,543,907
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      207,732
<TOTAL-LIABILITIES>                            207,732
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    20,859,253
<SHARES-COMMON-STOCK>                          858,781
<SHARES-COMMON-PRIOR>                          818,688
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                    (4,718,355)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     7,195,277
<NET-ASSETS>                                 2,333,175
<DIVIDEND-INCOME>                              196,652
<INTEREST-INCOME>                                5,042
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 273,019
<NET-INVESTMENT-INCOME>                       (71,025)
<REALIZED-GAINS-CURRENT>                     5,127,645
<APPREC-INCREASE-CURRENT>                    6,484,841
<NET-CHANGE-FROM-OPS>                       11,541,461
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        248,887
<NUMBER-OF-SHARES-REDEEMED>                    208,794
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                      10,050,820
<ACCUMULATED-NII-PRIOR>                       (48,614)
<ACCUMULATED-GAINS-PRIOR>                  (9,858,211)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          141,638
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                498,660
<AVERAGE-NET-ASSETS>                         6,935,536
<PER-SHARE-NAV-BEGIN>                             6.42
<PER-SHARE-NII>                                 (0.06)
<PER-SHARE-GAIN-APPREC>                           6.05
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              12.41
<EXPENSE-RATIO>                                   1.99


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS ASIA GROWTH FUND - CLASS O
<SERIES>
   <NUMBER> 010
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                       15,995,792
<INVESTMENTS-AT-VALUE>                      23,273,537
<RECEIVABLES>                                   45,794
<ASSETS-OTHER>                                 224,576
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              23,543,907
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      207,732
<TOTAL-LIABILITIES>                            207,732
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    20,859,253
<SHARES-COMMON-STOCK>                          105,260
<SHARES-COMMON-PRIOR>                          206,929
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                    (4,718,355)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     7,195,277
<NET-ASSETS>                                 2,333,175
<DIVIDEND-INCOME>                              196,652
<INTEREST-INCOME>                                5,042
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 273,019
<NET-INVESTMENT-INCOME>                       (71,025)
<REALIZED-GAINS-CURRENT>                     5,127,645
<APPREC-INCREASE-CURRENT>                    6,484,841
<NET-CHANGE-FROM-OPS>                       11,541,461
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          5,260
<NUMBER-OF-SHARES-REDEEMED>                    106,292
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                      10,050,820
<ACCUMULATED-NII-PRIOR>                       (48,614)
<ACCUMULATED-GAINS-PRIOR>                  (9,858,211)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          141,638
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                498,660
<AVERAGE-NET-ASSETS>                         1,279,043
<PER-SHARE-NAV-BEGIN>                             6.54
<PER-SHARE-NII>                                   0.02
<PER-SHARE-GAIN-APPREC>                           6.20
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              12.76
<EXPENSE-RATIO>                                   0.97


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS BALANCED FUND - CLASS 2
<SERIES>
   <NUMBER> 009
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUND INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                      158,739,157
<INVESTMENTS-AT-VALUE>                     164,119,458
<RECEIVABLES>                               10,449,053
<ASSETS-OTHER>                                  15,177
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             174,583,688
<PAYABLE-FOR-SECURITIES>                    11,564,674
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    7,486,833
<TOTAL-LIABILITIES>                         19,051,507
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   147,528,017
<SHARES-COMMON-STOCK>                        1,643,858
<SHARES-COMMON-PRIOR>                        2,246,860
<ACCUMULATED-NII-CURRENT>                      179,672
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      2,444,191
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     5,380,301
<NET-ASSETS>                               155,532,181
<DIVIDEND-INCOME>                            3,007,469
<INTEREST-INCOME>                            5,748,314
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               2,810,391
<NET-INVESTMENT-INCOME>                      5,945,392
<REALIZED-GAINS-CURRENT>                     5,686,848
<APPREC-INCREASE-CURRENT>                  (6,394,670)
<NET-CHANGE-FROM-OPS>                        5,237,570
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      800,640
<DISTRIBUTIONS-OF-GAINS>                       432,059
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        292,789
<NUMBER-OF-SHARES-REDEEMED>                    971,905
<SHARES-REINVESTED>                             76,114
<NET-CHANGE-IN-ASSETS>                    (47,707,652)
<ACCUMULATED-NII-PRIOR>                        150,615
<ACCUMULATED-GAINS-PRIOR>                    (195,011)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        1,109,398
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              3,217,294
<AVERAGE-NET-ASSETS>                        26,398,618
<PER-SHARE-NAV-BEGIN>                            13.11
<PER-SHARE-NII>                                   0.41
<PER-SHARE-GAIN-APPREC>                         (0.09)
<PER-SHARE-DIVIDEND>                              0.42
<PER-SHARE-DISTRIBUTIONS>                         0.22
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              12.79
<EXPENSE-RATIO>                                   1.70


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS BALANCED FUND - CLASS A
<SERIES>
   <NUMBER> 009
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUND INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                      158,739,157
<INVESTMENTS-AT-VALUE>                     164,119,458
<RECEIVABLES>                               10,449,053
<ASSETS-OTHER>                                  15,177
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             174,583,688
<PAYABLE-FOR-SECURITIES>                    11,564,674
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    7,486,833
<TOTAL-LIABILITIES>                         19,051,507
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   147,528,017
<SHARES-COMMON-STOCK>                        2,762,723
<SHARES-COMMON-PRIOR>                        3,925,358
<ACCUMULATED-NII-CURRENT>                      179,672
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      2,444,191
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     5,380,301
<NET-ASSETS>                               155,532,181
<DIVIDEND-INCOME>                            3,007,469
<INTEREST-INCOME>                            5,748,314
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               2,810,391
<NET-INVESTMENT-INCOME>                      5,945,392
<REALIZED-GAINS-CURRENT>                     5,686,848
<APPREC-INCREASE-CURRENT>                  (6,394,670)
<NET-CHANGE-FROM-OPS>                        5,237,570
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                    1,550,143
<DISTRIBUTIONS-OF-GAINS>                       680,529
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        399,441
<NUMBER-OF-SHARES-REDEEMED>                  1,705,708
<SHARES-REINVESTED>                            143,632
<NET-CHANGE-IN-ASSETS>                    (47,707,652)
<ACCUMULATED-NII-PRIOR>                        150,615
<ACCUMULATED-GAINS-PRIOR>                    (195,011)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        1,109,398
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              3,217,294
<AVERAGE-NET-ASSETS>                        42,344,046
<PER-SHARE-NAV-BEGIN>                            13.11
<PER-SHARE-NII>                                   0.50
<PER-SHARE-GAIN-APPREC>                         (0.08)
<PER-SHARE-DIVIDEND>                              0.50
<PER-SHARE-DISTRIBUTIONS>                         0.22
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              12.81
<EXPENSE-RATIO>                                   0.95


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS BALANCED FUND - CLASS B
<SERIES>
   <NUMBER> 009
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUND INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                      158,739,157
<INVESTMENTS-AT-VALUE>                     164,119,458
<RECEIVABLES>                               10,449,053
<ASSETS-OTHER>                                  15,177
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             174,583,688
<PAYABLE-FOR-SECURITIES>                    11,564,674
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    7,486,833
<TOTAL-LIABILITIES>                         19,051,507
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   147,528,017
<SHARES-COMMON-STOCK>                        7,651,075
<SHARES-COMMON-PRIOR>                        9,239,410
<ACCUMULATED-NII-CURRENT>                      179,672
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      2,444,191
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     5,380,301
<NET-ASSETS>                               155,532,181
<DIVIDEND-INCOME>                            3,007,469
<INTEREST-INCOME>                            5,748,314
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               2,810,391
<NET-INVESTMENT-INCOME>                      5,945,392
<REALIZED-GAINS-CURRENT>                     5,686,848
<APPREC-INCREASE-CURRENT>                  (6,394,670)
<NET-CHANGE-FROM-OPS>                        5,237,570
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                    3,475,675
<DISTRIBUTIONS-OF-GAINS>                     1,939,663
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        953,569
<NUMBER-OF-SHARES-REDEEMED>                  2,884,560
<SHARES-REINVESTED>                            342,656
<NET-CHANGE-IN-ASSETS>                    (47,707,652)
<ACCUMULATED-NII-PRIOR>                        150,615
<ACCUMULATED-GAINS-PRIOR>                    (195,011)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        1,109,398
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              3,217,294
<AVERAGE-NET-ASSETS>                       114,625,040
<PER-SHARE-NAV-BEGIN>                            13.08
<PER-SHARE-NII>                                   0.40
<PER-SHARE-GAIN-APPREC>                         (0.08)
<PER-SHARE-DIVIDEND>                              0.42
<PER-SHARE-DISTRIBUTIONS>                         0.22
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              12.76
<EXPENSE-RATIO>                                   1.70


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS BALANCED FUND - CLASS O
<SERIES>
   <NUMBER> 009
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUND INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                      158,739,157
<INVESTMENTS-AT-VALUE>                     164,119,458
<RECEIVABLES>                               10,449,053
<ASSETS-OTHER>                                  15,177
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             174,583,688
<PAYABLE-FOR-SECURITIES>                    11,564,674
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    7,486,833
<TOTAL-LIABILITIES>                         19,051,507
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   147,528,017
<SHARES-COMMON-STOCK>                          113,393
<SHARES-COMMON-PRIOR>                          115,566
<ACCUMULATED-NII-CURRENT>                      179,672
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      2,444,191
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     5,380,301
<NET-ASSETS>                               155,532,181
<DIVIDEND-INCOME>                            3,007,469
<INTEREST-INCOME>                            5,748,314
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               2,810,391
<NET-INVESTMENT-INCOME>                      5,945,392
<REALIZED-GAINS-CURRENT>                     5,686,848
<APPREC-INCREASE-CURRENT>                  (6,394,670)
<NET-CHANGE-FROM-OPS>                        5,237,570
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                       58,854
<DISTRIBUTIONS-OF-GAINS>                        26,418
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          4,263
<NUMBER-OF-SHARES-REDEEMED>                     12,693
<SHARES-REINVESTED>                              6,257
<NET-CHANGE-IN-ASSETS>                    (47,707,652)
<ACCUMULATED-NII-PRIOR>                        150,615
<ACCUMULATED-GAINS-PRIOR>                    (195,011)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        1,109,398
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              3,217,294
<AVERAGE-NET-ASSETS>                         1,532,000
<PER-SHARE-NAV-BEGIN>                            13.18
<PER-SHARE-NII>                                   0.54
<PER-SHARE-GAIN-APPREC>                         (0.09)
<PER-SHARE-DIVIDEND>                              0.53
<PER-SHARE-DISTRIBUTIONS>                         0.22
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              12.88
<EXPENSE-RATIO>                                   0.70


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS CASH MANAGEMENT FUND - CLASS 2
<SERIES>
   <NUMBER> 001
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                       52,169,488
<INVESTMENTS-AT-VALUE>                      52,169,488
<RECEIVABLES>                                  385,235
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              52,554,723
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      410,297
<TOTAL-LIABILITIES>                            410,297
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    52,146,613
<SHARES-COMMON-STOCK>                        1,932,524
<SHARES-COMMON-PRIOR>                        2,740,572
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                        (2,187)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                52,144,426
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                            2,633,347
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 266,879
<NET-INVESTMENT-INCOME>                      2,366,468
<REALIZED-GAINS-CURRENT>                         (349)
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                        2,366,119
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      114,602
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                     13,158,778
<NUMBER-OF-SHARES-REDEEMED>                 13,993,462
<SHARES-REINVESTED>                             26,636
<NET-CHANGE-IN-ASSETS>                     (2,828,863)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                      (2,732)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          126,538
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                266,879
<AVERAGE-NET-ASSETS>                         2,453,069
<PER-SHARE-NAV-BEGIN>                             1.00
<PER-SHARE-NII>                                   0.05
<PER-SHARE-GAIN-APPREC>                           0.00
<PER-SHARE-DIVIDEND>                              0.05
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               1.00
<EXPENSE-RATIO>                                   0.53


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS CASH MANAGEMENT FUND - CLASS A
<SERIES>
   <NUMBER> 001
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                       52,169,488
<INVESTMENTS-AT-VALUE>                      52,169,488
<RECEIVABLES>                                  385,235
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              52,554,723
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      410,297
<TOTAL-LIABILITIES>                            410,297
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    52,146,613
<SHARES-COMMON-STOCK>                       20,702,969
<SHARES-COMMON-PRIOR>                       26,792,976
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                        (2,187)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                52,144,426
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                            2,633,347
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 266,879
<NET-INVESTMENT-INCOME>                      2,366,468
<REALIZED-GAINS-CURRENT>                         (349)
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                        2,366,119
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                    1,042,216
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                    405,754,940
<NUMBER-OF-SHARES-REDEEMED>                412,102,761
<SHARES-REINVESTED>                            257,814
<NET-CHANGE-IN-ASSETS>                     (2,828,863)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                      (2,732)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          126,538
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                266,879
<AVERAGE-NET-ASSETS>                        22,430,080
<PER-SHARE-NAV-BEGIN>                             1.00
<PER-SHARE-NII>                                   0.05
<PER-SHARE-GAIN-APPREC>                           0.00
<PER-SHARE-DIVIDEND>                              0.05
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               1.00
<EXPENSE-RATIO>                                   0.53


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS CASH MANAGEMENT FUND - CLASS B
<SERIES>
   <NUMBER> 001
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                       52,169,488
<INVESTMENTS-AT-VALUE>                      52,169,488
<RECEIVABLES>                                  385,235
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              52,554,723
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      410,297
<TOTAL-LIABILITIES>                            410,297
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    52,146,613
<SHARES-COMMON-STOCK>                       20,477,014
<SHARES-COMMON-PRIOR>                       17,373,626
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                        (2,187)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                52,144,426
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                            2,633,347
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 266,879
<NET-INVESTMENT-INCOME>                      2,366,468
<REALIZED-GAINS-CURRENT>                         (349)
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                        2,366,119
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      751,814
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                     25,772,175
<NUMBER-OF-SHARES-REDEEMED>                 22,853,280
<SHARES-REINVESTED>                            184,493
<NET-CHANGE-IN-ASSETS>                     (2,828,863)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                      (2,732)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          126,538
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                266,879
<AVERAGE-NET-ASSETS>                        15,932,544
<PER-SHARE-NAV-BEGIN>                             1.00
<PER-SHARE-NII>                                   0.05
<PER-SHARE-GAIN-APPREC>                           0.00
<PER-SHARE-DIVIDEND>                              0.05
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               1.00
<EXPENSE-RATIO>                                   0.53


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS CASH MANAGEMENT FUND - CLASS O
<SERIES>
   <NUMBER> 001
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                       52,169,488
<INVESTMENTS-AT-VALUE>                      52,169,488
<RECEIVABLES>                                  385,235
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              52,554,723
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      410,297
<TOTAL-LIABILITIES>                            410,297
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    52,146,613
<SHARES-COMMON-STOCK>                        9,035,000
<SHARES-COMMON-PRIOR>                        8,068,847
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                        (2,187)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                52,144,426
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                            2,633,347
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 266,879
<NET-INVESTMENT-INCOME>                      2,366,468
<REALIZED-GAINS-CURRENT>                         (349)
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                        2,366,119
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      457,836
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                     45,102,031
<NUMBER-OF-SHARES-REDEEMED>                 44,304,048
<SHARES-REINVESTED>                            168,170
<NET-CHANGE-IN-ASSETS>                     (2,828,863)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                      (2,732)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          126,538
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                266,879
<AVERAGE-NET-ASSETS>                         9,799,410
<PER-SHARE-NAV-BEGIN>                             1.00
<PER-SHARE-NII>                                   0.05
<PER-SHARE-GAIN-APPREC>                           0.00
<PER-SHARE-DIVIDEND>                              0.05
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               1.00
<EXPENSE-RATIO>                                   0.53


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALMON BROTHERS HIGH YIELD BOND FUND - CLASS A
<SERIES>
   <NUMBER> 007
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUND INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                      573,640,079
<INVESTMENTS-AT-VALUE>                     527,255,579
<RECEIVABLES>                               16,033,796
<ASSETS-OTHER>                                  12,311
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             543,301,704
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    7,837,465
<TOTAL-LIABILITIES>                          7,837,465
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   659,487,756
<SHARES-COMMON-STOCK>                       13,244,504
<SHARES-COMMON-PRIOR>                       14,739,278
<ACCUMULATED-NII-CURRENT>                  (3,044,863)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                   (74,594,172)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                  (46,384,482)
<NET-ASSETS>                               535,464,239
<DIVIDEND-INCOME>                              235,250
<INTEREST-INCOME>                           65,978,076
<OTHER-INCOME>                                       0
<EXPENSES-NET>                              10,028,139
<NET-INVESTMENT-INCOME>                     56,185,187
<REALIZED-GAINS-CURRENT>                  (39,684,862)
<APPREC-INCREASE-CURRENT>                   18,634,076
<NET-CHANGE-FROM-OPS>                       35,134,401
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                 (15,339,365)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      7,527,657
<NUMBER-OF-SHARES-REDEEMED>                  9,682,595
<SHARES-REINVESTED>                            660,164
<NET-CHANGE-IN-ASSETS>                    (33,456,729)
<ACCUMULATED-NII-PRIOR>                      (813,886)
<ACCUMULATED-GAINS-PRIOR>                 (34,909,310)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        4,506,911
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                             10,099,003
<AVERAGE-NET-ASSETS>                       138,769,396
<PER-SHARE-NAV-BEGIN>                             9.89
<PER-SHARE-NII>                                   1.01
<PER-SHARE-GAIN-APPREC>                         (0.36)
<PER-SHARE-DIVIDEND>                              1.06
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               9.48
<EXPENSE-RATIO>                                   1.27


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALMON BROTHERS HIGH YIELD BOND FUND - CLASS B
<SERIES>
   <NUMBER> 007
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUND INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                      573,640,079
<INVESTMENTS-AT-VALUE>                     527,255,579
<RECEIVABLES>                               16,033,796
<ASSETS-OTHER>                                  12,311
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             543,301,704
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    7,837,465
<TOTAL-LIABILITIES>                          7,837,465
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   659,487,756
<SHARES-COMMON-STOCK>                       32,882,811
<SHARES-COMMON-PRIOR>                       33,212,397
<ACCUMULATED-NII-CURRENT>                  (3,044,863)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                   (74,594,172)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                  (46,384,482)
<NET-ASSETS>                               535,464,239
<DIVIDEND-INCOME>                              235,250
<INTEREST-INCOME>                           65,978,076
<OTHER-INCOME>                                       0
<EXPENSES-NET>                              10,028,139
<NET-INVESTMENT-INCOME>                     56,185,187
<REALIZED-GAINS-CURRENT>                  (39,684,862)
<APPREC-INCREASE-CURRENT>                   18,634,076
<NET-CHANGE-FROM-OPS>                       35,134,401
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                 (32,771,477)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      6,383,669
<NUMBER-OF-SHARES-REDEEMED>                  7,821,057
<SHARES-REINVESTED>                          1,107,772
<NET-CHANGE-IN-ASSETS>                    (33,456,729)
<ACCUMULATED-NII-PRIOR>                      (813,886)
<ACCUMULATED-GAINS-PRIOR>                 (34,909,310)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        4,506,911
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                             10,099,003
<AVERAGE-NET-ASSETS>                       324,068,951
<PER-SHARE-NAV-BEGIN>                             9.87
<PER-SHARE-NII>                                   0.94
<PER-SHARE-GAIN-APPREC>                         (0.36)
<PER-SHARE-DIVIDEND>                              0.97
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               9.48
<EXPENSE-RATIO>                                   2.02


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALMON BROTHERS HIGH YIELD BOND FUND - CLASS L
<SERIES>
   <NUMBER> 007
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUND INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                      573,640,079
<INVESTMENTS-AT-VALUE>                     527,255,579
<RECEIVABLES>                               16,033,796
<ASSETS-OTHER>                                  12,311
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             543,301,704
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    7,837,465
<TOTAL-LIABILITIES>                          7,837,465
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   659,487,756
<SHARES-COMMON-STOCK>                        8,900,778
<SHARES-COMMON-PRIOR>                        8,781,482
<ACCUMULATED-NII-CURRENT>                  (3,044,863)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                   (74,594,172)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                  (46,384,482)
<NET-ASSETS>                               535,464,239
<DIVIDEND-INCOME>                              235,250
<INTEREST-INCOME>                           65,978,076
<OTHER-INCOME>                                       0
<EXPENSES-NET>                              10,028,139
<NET-INVESTMENT-INCOME>                     56,185,187
<REALIZED-GAINS-CURRENT>                  (39,684,862)
<APPREC-INCREASE-CURRENT>                   18,634,076
<NET-CHANGE-FROM-OPS>                       35,134,401
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                  (8,956,774)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      2,538,622
<NUMBER-OF-SHARES-REDEEMED>                  2,815,036
<SHARES-REINVESTED>                            395,710
<NET-CHANGE-IN-ASSETS>                    (33,456,729)
<ACCUMULATED-NII-PRIOR>                      (813,886)
<ACCUMULATED-GAINS-PRIOR>                 (34,909,310)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        4,506,911
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                             10,099,003
<AVERAGE-NET-ASSETS>                        88,541,774
<PER-SHARE-NAV-BEGIN>                             9.86
<PER-SHARE-NII>                                   0.96
<PER-SHARE-GAIN-APPREC>                         (0.35)
<PER-SHARE-DIVIDEND>                              0.97
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               9.50
<EXPENSE-RATIO>                                   1.79


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALMON BROTHERS HIGH YIELD BOND FUND - CLASS Y
<SERIES>
   <NUMBER> 007
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUND INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                      573,640,079
<INVESTMENTS-AT-VALUE>                     527,255,579
<RECEIVABLES>                               16,033,796
<ASSETS-OTHER>                                  12,311
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             543,301,704
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    7,837,465
<TOTAL-LIABILITIES>                          7,837,465
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   659,487,756
<SHARES-COMMON-STOCK>                        1,427,280
<SHARES-COMMON-PRIOR>                          903,143
<ACCUMULATED-NII-CURRENT>                  (3,044,863)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                   (74,594,172)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                  (46,384,482)
<NET-ASSETS>                               535,464,239
<DIVIDEND-INCOME>                              235,250
<INTEREST-INCOME>                           65,978,076
<OTHER-INCOME>                                       0
<EXPENSES-NET>                              10,028,139
<NET-INVESTMENT-INCOME>                     56,185,187
<REALIZED-GAINS-CURRENT>                  (39,684,862)
<APPREC-INCREASE-CURRENT>                   18,634,076
<NET-CHANGE-FROM-OPS>                       35,134,401
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                  (1,348,548)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        931,913
<NUMBER-OF-SHARES-REDEEMED>                    540,329
<SHARES-REINVESTED>                            132,553
<NET-CHANGE-IN-ASSETS>                    (33,456,729)
<ACCUMULATED-NII-PRIOR>                      (813,886)
<ACCUMULATED-GAINS-PRIOR>                 (34,909,310)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        4,506,911
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                             10,099,003
<AVERAGE-NET-ASSETS>                        11,880,437
<PER-SHARE-NAV-BEGIN>                             9.89
<PER-SHARE-NII>                                   1.04
<PER-SHARE-GAIN-APPREC>                         (0.36)
<PER-SHARE-DIVIDEND>                              1.09
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               9.48
<EXPENSE-RATIO>                                   1.02


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS INSTITUTIONAL MONEY MARKET FUND
<SERIES>
   <NUMBER> 003
   <NAME> SOLOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                      118,785,603
<INVESTMENTS-AT-VALUE>                     118,785,603
<RECEIVABLES>                                1,022,119
<ASSETS-OTHER>                                  29,691
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             119,837,413
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      606,438
<TOTAL-LIABILITIES>                            606,438
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   119,232,128
<SHARES-COMMON-STOCK>                      119,232,128
<SHARES-COMMON-PRIOR>                      138,942,921
<ACCUMULATED-NII-CURRENT>                          881
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                        (2,034)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                               119,230,975
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                            6,544,437
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 208,433
<NET-INVESTMENT-INCOME>                      6,336,004
<REALIZED-GAINS-CURRENT>                           663
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                        6,336,667
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                    6,336,004
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                     44,681,156
<NUMBER-OF-SHARES-REDEEMED>                 68,683,659
<SHARES-REINVESTED>                          4,291,711
<NET-CHANGE-IN-ASSETS>                    (19,710,129)
<ACCUMULATED-NII-PRIOR>                            881
<ACCUMULATED-GAINS-PRIOR>                      (2,697)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          314,197
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                459,791
<AVERAGE-NET-ASSETS>                       125,678,920
<PER-SHARE-NAV-BEGIN>                             1.00
<PER-SHARE-NII>                                   0.05
<PER-SHARE-GAIN-APPREC>                           0.00
<PER-SHARE-DIVIDEND>                              0.05
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               1.00
<EXPENSE-RATIO>                                   0.17


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS INTERNATIONAL EQUITY FUND
<SERIES>
   <NUMBER> 13
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUND INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                        6,667,641
<INVESTMENTS-AT-VALUE>                       8,329,480
<RECEIVABLES>                                  191,632
<ASSETS-OTHER>                               1,625,529
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              10,146,641
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       42,662
<TOTAL-LIABILITIES>                             42,662
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                     8,507,624
<SHARES-COMMON-STOCK>                          195,862
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                       (65,459)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     1,661,814
<NET-ASSETS>                                10,103,979
<DIVIDEND-INCOME>                                4,568
<INTEREST-INCOME>                                    0
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                  27,615
<NET-INVESTMENT-INCOME>                       (23,047)
<REALIZED-GAINS-CURRENT>                      (52,565)
<APPREC-INCREASE-CURRENT>                    1,661,814
<NET-CHANGE-FROM-OPS>                        1,586,202
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        196,159
<NUMBER-OF-SHARES-REDEEMED>                        297
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                      10,103,979
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                           12,135
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 60,740
<AVERAGE-NET-ASSETS>                         1,764,822
<PER-SHARE-NAV-BEGIN>                            10.00
<PER-SHARE-NII>                                 (0.04)
<PER-SHARE-GAIN-APPREC>                           2.50
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              12.46
<EXPENSE-RATIO>                                   2.50


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS INTERNATIONAL EQUITY FUND
<SERIES>
   <NUMBER> 13
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUND INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                        6,667,641
<INVESTMENTS-AT-VALUE>                       8,329,480
<RECEIVABLES>                                  191,632
<ASSETS-OTHER>                               1,625,529
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              10,146,641
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       42,662
<TOTAL-LIABILITIES>                             42,662
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                     8,507,624
<SHARES-COMMON-STOCK>                          203,157
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                       (65,459)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     1,661,814
<NET-ASSETS>                                10,103,979
<DIVIDEND-INCOME>                                4,568
<INTEREST-INCOME>                                    0
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                  27,615
<NET-INVESTMENT-INCOME>                       (23,047)
<REALIZED-GAINS-CURRENT>                      (52,565)
<APPREC-INCREASE-CURRENT>                    1,661,814
<NET-CHANGE-FROM-OPS>                        1,586,202
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        206,248
<NUMBER-OF-SHARES-REDEEMED>                      3,091
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                      10,103,979
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                           12,135
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 60,740
<AVERAGE-NET-ASSETS>                         1,646,169
<PER-SHARE-NAV-BEGIN>                            10.00
<PER-SHARE-NII>                                 (0.03)
<PER-SHARE-GAIN-APPREC>                           2.52
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              12.49
<EXPENSE-RATIO>                                   1.75


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS INTERNATIONAL EQUITY FUND
<SERIES>
   <NUMBER> 13
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUND INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                        6,667,641
<INVESTMENTS-AT-VALUE>                       8,329,480
<RECEIVABLES>                                  191,632
<ASSETS-OTHER>                               1,625,529
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              10,146,641
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       42,662
<TOTAL-LIABILITIES>                             42,662
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                     8,507,624
<SHARES-COMMON-STOCK>                          309,770
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                       (65,459)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     1,661,814
<NET-ASSETS>                                10,103,979
<DIVIDEND-INCOME>                                4,568
<INTEREST-INCOME>                                    0
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                  27,615
<NET-INVESTMENT-INCOME>                       (23,047)
<REALIZED-GAINS-CURRENT>                      (52,565)
<APPREC-INCREASE-CURRENT>                    1,661,814
<NET-CHANGE-FROM-OPS>                        1,586,202
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        311,181
<NUMBER-OF-SHARES-REDEEMED>                      1,411
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                      10,103,979
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                           12,135
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 60,740
<AVERAGE-NET-ASSETS>                         2,361,735
<PER-SHARE-NAV-BEGIN>                            10.00
<PER-SHARE-NII>                                 (0.04)
<PER-SHARE-GAIN-APPREC>                           2.51
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              12.47
<EXPENSE-RATIO>                                   2.50


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS INTERNATIONAL EQUITY FUND
<SERIES>
   <NUMBER> 13
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUND INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                        6,667,641
<INVESTMENTS-AT-VALUE>                       8,329,480
<RECEIVABLES>                                  191,632
<ASSETS-OTHER>                               1,625,529
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              10,146,641
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       42,662
<TOTAL-LIABILITIES>                             42,662
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                     8,507,624
<SHARES-COMMON-STOCK>                          101,012
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                       (65,459)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     1,661,814
<NET-ASSETS>                                10,103,979
<DIVIDEND-INCOME>                                4,568
<INTEREST-INCOME>                                    0
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                  27,615
<NET-INVESTMENT-INCOME>                       (23,047)
<REALIZED-GAINS-CURRENT>                      (52,565)
<APPREC-INCREASE-CURRENT>                    1,661,814
<NET-CHANGE-FROM-OPS>                        1,586,202
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        101,012
<NUMBER-OF-SHARES-REDEEMED>                          0
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                      10,103,979
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                           12,135
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 60,740
<AVERAGE-NET-ASSETS>                         1,083,253
<PER-SHARE-NAV-BEGIN>                            10.00
<PER-SHARE-NII>                                 (0.02)
<PER-SHARE-GAIN-APPREC>                           2.51
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              12.49
<EXPENSE-RATIO>                                   1.50


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS LARGE CAP GROWTH FUND
<SERIES>
   <NUMBER> 12
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                       10,122,746
<INVESTMENTS-AT-VALUE>                      10,921,441
<RECEIVABLES>                                  446,814
<ASSETS-OTHER>                                 139,759
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              11,508,014
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       43,590
<TOTAL-LIABILITIES>                             43,590
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    10,640,729
<SHARES-COMMON-STOCK>                          110,603
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                         25,000
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       798,695
<NET-ASSETS>                                11,464,424
<DIVIDEND-INCOME>                                9,616
<INTEREST-INCOME>                                4,822
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                  24,294
<NET-INVESTMENT-INCOME>                        (9,856)
<REALIZED-GAINS-CURRENT>                        31,908
<APPREC-INCREASE-CURRENT>                      798,695
<NET-CHANGE-FROM-OPS>                          820,747
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        112,907
<NUMBER-OF-SHARES-REDEEMED>                      2,304
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                      11,464,424
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                           10,872
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 59,108
<AVERAGE-NET-ASSETS>                           947,479
<PER-SHARE-NAV-BEGIN>                            10.00
<PER-SHARE-NII>                                 (0.02)
<PER-SHARE-GAIN-APPREC>                           1.18
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              11.16
<EXPENSE-RATIO>                                   2.19


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS LARGE CAP GROWTH FUND
<SERIES>
   <NUMBER> 12
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                       10,122,746
<INVESTMENTS-AT-VALUE>                      10,921,441
<RECEIVABLES>                                  446,814
<ASSETS-OTHER>                                 139,759
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              11,508,014
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       43,590
<TOTAL-LIABILITIES>                             43,590
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    10,640,729
<SHARES-COMMON-STOCK>                          185,205
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                         25,000
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       798,695
<NET-ASSETS>                                11,464,424
<DIVIDEND-INCOME>                                9,616
<INTEREST-INCOME>                                4,822
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                  24,294
<NET-INVESTMENT-INCOME>                        (9,856)
<REALIZED-GAINS-CURRENT>                        31,908
<APPREC-INCREASE-CURRENT>                      798,695
<NET-CHANGE-FROM-OPS>                          820,747
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        185,594
<NUMBER-OF-SHARES-REDEEMED>                        389
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                      11,464,424
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                           10,872
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 59,108
<AVERAGE-NET-ASSETS>                         1,679,173
<PER-SHARE-NAV-BEGIN>                            10.00
<PER-SHARE-NII>                                 (0.01)
<PER-SHARE-GAIN-APPREC>                           1.19
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              11.18
<EXPENSE-RATIO>                                   1.44


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS LARGE CAP GROWTH FUND
<SERIES>
   <NUMBER> 12
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                       10,122,746
<INVESTMENTS-AT-VALUE>                      10,921,441
<RECEIVABLES>                                  446,814
<ASSETS-OTHER>                                 139,759
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              11,508,014
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       43,590
<TOTAL-LIABILITIES>                             43,590
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    10,640,729
<SHARES-COMMON-STOCK>                          559,048
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                         25,000
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       798,695
<NET-ASSETS>                                11,464,424
<DIVIDEND-INCOME>                                9,616
<INTEREST-INCOME>                                4,822
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                  24,294
<NET-INVESTMENT-INCOME>                        (9,856)
<REALIZED-GAINS-CURRENT>                        31,908
<APPREC-INCREASE-CURRENT>                      798,695
<NET-CHANGE-FROM-OPS>                          820,747
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        559,621
<NUMBER-OF-SHARES-REDEEMED>                        573
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                      11,464,424
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                           10,872
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 59,108
<AVERAGE-NET-ASSETS>                         2,919,071
<PER-SHARE-NAV-BEGIN>                            10.00
<PER-SHARE-NII>                                 (0.02)
<PER-SHARE-GAIN-APPREC>                           1.19
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              11.17
<EXPENSE-RATIO>                                   2.21


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS LARGE CAP GROWTH FUND
<SERIES>
   <NUMBER> 12
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                       10,122,746
<INVESTMENTS-AT-VALUE>                      10,921,441
<RECEIVABLES>                                  446,814
<ASSETS-OTHER>                                 139,759
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              11,508,014
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       43,590
<TOTAL-LIABILITIES>                             43,590
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    10,640,729
<SHARES-COMMON-STOCK>                          171,394
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                         25,000
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       798,695
<NET-ASSETS>                                11,464,424
<DIVIDEND-INCOME>                                9,616
<INTEREST-INCOME>                                4,822
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                  24,294
<NET-INVESTMENT-INCOME>                        (9,856)
<REALIZED-GAINS-CURRENT>                        31,908
<APPREC-INCREASE-CURRENT>                      798,695
<NET-CHANGE-FROM-OPS>                          820,747
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        171,394
<NUMBER-OF-SHARES-REDEEMED>                          0
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                      11,464,424
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                           10,872
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 59,108
<AVERAGE-NET-ASSETS>                         1,776,432
<PER-SHARE-NAV-BEGIN>                            10.00
<PER-SHARE-NII>                                   0.00
<PER-SHARE-GAIN-APPREC>                           1.18
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              11.18
<EXPENSE-RATIO>                                   1.21


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS NATIONAL INTERMEDIATE MUNICIPAL FUND
<SERIES>
   <NUMBER> 005
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                       14,079,837
<INVESTMENTS-AT-VALUE>                      14,198,840
<RECEIVABLES>                                  324,138
<ASSETS-OTHER>                                  84,787
<OTHER-ITEMS-ASSETS>                                 0
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<OTHER-ITEMS-LIABILITIES>                    1,333,286
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<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    13,254,611
<SHARES-COMMON-STOCK>                          215,526
<SHARES-COMMON-PRIOR>                          216,665
<ACCUMULATED-NII-CURRENT>                     (54,031)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                       (45,104)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       119,003
<NET-ASSETS>                                13,274,479
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                              790,193
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 124,381
<NET-INVESTMENT-INCOME>                        665,812
<REALIZED-GAINS-CURRENT>                       (8,467)
<APPREC-INCREASE-CURRENT>                    (658,457)
<NET-CHANGE-FROM-OPS>                          (1,112)
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                       99,215
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        129,309
<NUMBER-OF-SHARES-REDEEMED>                    137,489
<SHARES-REINVESTED>                              7,041
<NET-CHANGE-IN-ASSETS>                     (2,534,109)
<ACCUMULATED-NII-PRIOR>                       (31,431)
<ACCUMULATED-GAINS-PRIOR>                     (36,637)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                           85,376
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                347,884
<AVERAGE-NET-ASSETS>                         2,495,554
<PER-SHARE-NAV-BEGIN>                            10.57
<PER-SHARE-NII>                                   0.41
<PER-SHARE-GAIN-APPREC>                         (0.44)
<PER-SHARE-DIVIDEND>                              0.41
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              10.13
<EXPENSE-RATIO>                                   1.16


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS NATIONAL INTERMEDIATE MUNICIPAL FUND
<SERIES>
   <NUMBER> 005
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                       14,079,837
<INVESTMENTS-AT-VALUE>                      14,198,840
<RECEIVABLES>                                  324,138
<ASSETS-OTHER>                                  84,787
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              14,607,765
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    1,333,286
<TOTAL-LIABILITIES>                          1,333,286
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    13,254,611
<SHARES-COMMON-STOCK>                          439,258
<SHARES-COMMON-PRIOR>                          239,835
<ACCUMULATED-NII-CURRENT>                     (54,031)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                       (45,104)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       119,003
<NET-ASSETS>                                13,274,479
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                              790,193
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 124,381
<NET-INVESTMENT-INCOME>                        665,812
<REALIZED-GAINS-CURRENT>                       (8,467)
<APPREC-INCREASE-CURRENT>                    (658,457)
<NET-CHANGE-FROM-OPS>                          (1,112)
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      205,740
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        268,058
<NUMBER-OF-SHARES-REDEEMED>                     83,003
<SHARES-REINVESTED>                             14,368
<NET-CHANGE-IN-ASSETS>                     (2,534,109)
<ACCUMULATED-NII-PRIOR>                       (31,431)
<ACCUMULATED-GAINS-PRIOR>                     (36,637)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                           85,376
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                347,884
<AVERAGE-NET-ASSETS>                         4,443,449
<PER-SHARE-NAV-BEGIN>                            10.61
<PER-SHARE-NII>                                   0.48
<PER-SHARE-GAIN-APPREC>                         (0.46)
<PER-SHARE-DIVIDEND>                              0.48
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              10.15
<EXPENSE-RATIO>                                   0.63


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS NATIONAL INTERMEDIATE MUNICIPAL FUND
<SERIES>
   <NUMBER> 005
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                       14,079,837
<INVESTMENTS-AT-VALUE>                      14,198,840
<RECEIVABLES>                                  324,138
<ASSETS-OTHER>                                  84,787
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              14,607,765
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    1,333,286
<TOTAL-LIABILITIES>                          1,333,286
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    13,254,611
<SHARES-COMMON-STOCK>                          404,341
<SHARES-COMMON-PRIOR>                          261,355
<ACCUMULATED-NII-CURRENT>                     (54,031)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                       (45,104)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       119,003
<NET-ASSETS>                                13,274,479
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                              790,193
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 124,381
<NET-INVESTMENT-INCOME>                        665,812
<REALIZED-GAINS-CURRENT>                       (8,467)
<APPREC-INCREASE-CURRENT>                    (658,457)
<NET-CHANGE-FROM-OPS>                          (1,112)
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      135,463
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        208,229
<NUMBER-OF-SHARES-REDEEMED>                     70,117
<SHARES-REINVESTED>                              4,874
<NET-CHANGE-IN-ASSETS>                     (2,534,109)
<ACCUMULATED-NII-PRIOR>                       (31,431)
<ACCUMULATED-GAINS-PRIOR>                     (36,637)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                           85,376
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                347,884
<AVERAGE-NET-ASSETS>                         3,441,372
<PER-SHARE-NAV-BEGIN>                            10.57
<PER-SHARE-NII>                                   0.38
<PER-SHARE-GAIN-APPREC>                         (0.43)
<PER-SHARE-DIVIDEND>                              0.41
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              10.11
<EXPENSE-RATIO>                                   1.35


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS NATIONAL INTERMEDIATE MUNICIPAL FUND
<SERIES>
   <NUMBER> 005
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                       14,079,837
<INVESTMENTS-AT-VALUE>                      14,198,840
<RECEIVABLES>                                  324,138
<ASSETS-OTHER>                                  84,787
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              14,607,765
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    1,333,286
<TOTAL-LIABILITIES>                          1,333,286
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    13,254,611
<SHARES-COMMON-STOCK>                          250,634
<SHARES-COMMON-PRIOR>                          774,358
<ACCUMULATED-NII-CURRENT>                     (54,031)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                       (45,104)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       119,003
<NET-ASSETS>                                13,274,479
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                              790,193
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 124,381
<NET-INVESTMENT-INCOME>                        665,812
<REALIZED-GAINS-CURRENT>                       (8,467)
<APPREC-INCREASE-CURRENT>                    (658,457)
<NET-CHANGE-FROM-OPS>                          (1,112)
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      247,994
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          9,954
<NUMBER-OF-SHARES-REDEEMED>                    539,679
<SHARES-REINVESTED>                              6,001
<NET-CHANGE-IN-ASSETS>                     (2,534,109)
<ACCUMULATED-NII-PRIOR>                       (31,431)
<ACCUMULATED-GAINS-PRIOR>                     (36,637)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                           85,376
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                347,884
<AVERAGE-NET-ASSETS>                         5,139,311
<PER-SHARE-NAV-BEGIN>                            10.60
<PER-SHARE-NII>                                   0.49
<PER-SHARE-GAIN-APPREC>                         (0.44)
<PER-SHARE-DIVIDEND>                              0.50
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              10.15
<EXPENSE-RATIO>                                   0.41


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS NEW YORK MUNICIPAL MONEY MARKET FUND
<SERIES>
   <NUMBER> 002
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                      174,402,039
<INVESTMENTS-AT-VALUE>                     174,402,039
<RECEIVABLES>                                  640,017
<ASSETS-OTHER>                                 732,714
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             175,774,770
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      972,367
<TOTAL-LIABILITIES>                            972,367
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   174,976,054
<SHARES-COMMON-STOCK>                           33,000
<SHARES-COMMON-PRIOR>                          152,810
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      (173,651)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                               174,802,403
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                            5,842,945
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 740,587
<NET-INVESTMENT-INCOME>                      5,102,358
<REALIZED-GAINS-CURRENT>                            47
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                        5,102,405
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        1,063
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                         39,204
<NUMBER-OF-SHARES-REDEEMED>                    159,056
<SHARES-REINVESTED>                                 42
<NET-CHANGE-IN-ASSETS>                    (26,331,435)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    (234,644)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          447,769
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                740,587
<AVERAGE-NET-ASSETS>                            39,261
<PER-SHARE-NAV-BEGIN>                             1.00
<PER-SHARE-NII>                                   0.03
<PER-SHARE-GAIN-APPREC>                           0.00
<PER-SHARE-DIVIDEND>                              0.03
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               1.00
<EXPENSE-RATIO>                                   0.40


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS NEW YORK MUNICIPAL MONEY MARKET FUND
<SERIES>
   <NUMBER> 002
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                      174,402,039
<INVESTMENTS-AT-VALUE>                     174,402,039
<RECEIVABLES>                                  640,017
<ASSETS-OTHER>                                 732,714
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             175,774,770
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      972,367
<TOTAL-LIABILITIES>                            972,367
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   174,976,054
<SHARES-COMMON-STOCK>                        5,818,342
<SHARES-COMMON-PRIOR>                        5,371,796
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      (173,651)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                               174,802,403
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                            5,842,945
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 740,587
<NET-INVESTMENT-INCOME>                      5,102,358
<REALIZED-GAINS-CURRENT>                            47
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                        5,102,405
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      143,887
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      3,635,035
<NUMBER-OF-SHARES-REDEEMED>                  3,332,584
<SHARES-REINVESTED>                            114,095
<NET-CHANGE-IN-ASSETS>                    (26,331,435)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    (234,644)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          447,769
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                740,587
<AVERAGE-NET-ASSETS>                         5,048,720
<PER-SHARE-NAV-BEGIN>                             1.00
<PER-SHARE-NII>                                   0.03
<PER-SHARE-GAIN-APPREC>                           0.00
<PER-SHARE-DIVIDEND>                              0.03
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               1.00
<EXPENSE-RATIO>                                   0.41


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS NEW YORK MUNICIPAL MONEY MARKET FUND
<SERIES>
   <NUMBER> 002
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                      174,402,039
<INVESTMENTS-AT-VALUE>                     174,402,039
<RECEIVABLES>                                  640,017
<ASSETS-OTHER>                                 732,714
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             175,774,770
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      972,367
<TOTAL-LIABILITIES>                            972,367
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   174,976,054
<SHARES-COMMON-STOCK>                          258,551
<SHARES-COMMON-PRIOR>                           25,000
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      (173,651)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                               174,802,403
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                            5,842,945
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 740,587
<NET-INVESTMENT-INCOME>                      5,102,358
<REALIZED-GAINS-CURRENT>                            47
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                        5,102,405
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        5,978
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        269,414
<NUMBER-OF-SHARES-REDEEMED>                     40,331
<SHARES-REINVESTED>                              4,468
<NET-CHANGE-IN-ASSETS>                    (26,331,435)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    (234,644)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          447,769
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                740,587
<AVERAGE-NET-ASSETS>                           198,391
<PER-SHARE-NAV-BEGIN>                             1.00
<PER-SHARE-NII>                                   0.03
<PER-SHARE-GAIN-APPREC>                           0.00
<PER-SHARE-DIVIDEND>                              0.03
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               1.00
<EXPENSE-RATIO>                                   0.42


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS NEW YORK MUNICIPAL MONEY MARKET FUND
<SERIES>
   <NUMBER> 002
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                      174,402,039
<INVESTMENTS-AT-VALUE>                     174,402,039
<RECEIVABLES>                                  640,017
<ASSETS-OTHER>                                 732,714
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             175,774,770
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      972,367
<TOTAL-LIABILITIES>                            972,367
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   174,976,054
<SHARES-COMMON-STOCK>                      168,927,964
<SHARES-COMMON-PRIOR>                      195,819,733
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      (173,651)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                               174,802,403
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                            5,842,945
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 740,587
<NET-INVESTMENT-INCOME>                      5,102,358
<REALIZED-GAINS-CURRENT>                            47
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                        5,102,405
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                    4,951,430
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                    101,302,458
<NUMBER-OF-SHARES-REDEEMED>                133,081,632
<SHARES-REINVESTED>                          4,887,405
<NET-CHANGE-IN-ASSETS>                    (26,331,435)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    (234,644)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          447,769
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                740,587
<AVERAGE-NET-ASSETS>                       173,821,183
<PER-SHARE-NAV-BEGIN>                             1.00
<PER-SHARE-NII>                                   0.03
<PER-SHARE-GAIN-APPREC>                           0.00
<PER-SHARE-DIVIDEND>                              0.03
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               1.00
<EXPENSE-RATIO>                                   0.41


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS SMALL CAP GROWTH FUND - CLASS 2
<SERIES>
   <NUMBER> 011
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                      209,094,444
<INVESTMENTS-AT-VALUE>                     311,764,049
<RECEIVABLES>                                  391,984
<ASSETS-OTHER>                                     440
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             312,156,473
<PAYABLE-FOR-SECURITIES>                     3,009,371
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    2,954,391
<TOTAL-LIABILITIES>                          5,963,762
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   162,007,234
<SHARES-COMMON-STOCK>                          838,267
<SHARES-COMMON-PRIOR>                          127,254
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                     42,543,211
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   101,642,266
<NET-ASSETS>                               306,192,711
<DIVIDEND-INCOME>                              229,359
<INTEREST-INCOME>                              828,178
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               2,088,081
<NET-INVESTMENT-INCOME>                    (1,030,544)
<REALIZED-GAINS-CURRENT>                    59,817,958
<APPREC-INCREASE-CURRENT>                   11,271,260
<NET-CHANGE-FROM-OPS>                       70,058,674
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                       719,082
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        197,644
<NUMBER-OF-SHARES-REDEEMED>                     93,401
<SHARES-REINVESTED>                             45,657
<NET-CHANGE-IN-ASSETS>                     297,599,181
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    (319,961)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        1,035,619
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              2,129,592
<AVERAGE-NET-ASSETS>                         6,533,057
<PER-SHARE-NAV-BEGIN>                            11.56
<PER-SHARE-NII>                                 (0.17)
<PER-SHARE-GAIN-APPREC>                           6.57
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.92
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              17.04
<EXPENSE-RATIO>                                   2.14


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS SMALL CAP GROWTH FUND - CLASS A
<SERIES>
   <NUMBER> 011
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                      209,094,444
<INVESTMENTS-AT-VALUE>                     311,764,049
<RECEIVABLES>                                  391,984
<ASSETS-OTHER>                                     440
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             312,156,473
<PAYABLE-FOR-SECURITIES>                     3,009,371
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    2,954,391
<TOTAL-LIABILITIES>                          5,963,762
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   162,007,234
<SHARES-COMMON-STOCK>                        9,708,079
<SHARES-COMMON-PRIOR>                          276,591
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                     42,543,211
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   101,642,266
<NET-ASSETS>                               306,192,711
<DIVIDEND-INCOME>                              229,359
<INTEREST-INCOME>                              828,178
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               2,088,081
<NET-INVESTMENT-INCOME>                    (1,030,544)
<REALIZED-GAINS-CURRENT>                    59,817,958
<APPREC-INCREASE-CURRENT>                   11,271,260
<NET-CHANGE-FROM-OPS>                       70,058,674
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                     8,697,335
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      3,555,893
<NUMBER-OF-SHARES-REDEEMED>                  4,086,563
<SHARES-REINVESTED>                            526,908
<NET-CHANGE-IN-ASSETS>                     297,599,181
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    (319,961)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        1,035,619
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              2,129,592
<AVERAGE-NET-ASSETS>                        66,056,810
<PER-SHARE-NAV-BEGIN>                            11.59
<PER-SHARE-NII>                                 (0.07)
<PER-SHARE-GAIN-APPREC>                           6.63
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.92
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              17.23
<EXPENSE-RATIO>                                   1.37


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS SMALL CAP GROWTH FUND - CLASS B
<SERIES>
   <NUMBER> 011
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                      209,094,444
<INVESTMENTS-AT-VALUE>                     311,764,049
<RECEIVABLES>                                  391,984
<ASSETS-OTHER>                                     440
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             312,156,473
<PAYABLE-FOR-SECURITIES>                     3,009,371
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    2,954,391
<TOTAL-LIABILITIES>                          5,963,762
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   162,007,234
<SHARES-COMMON-STOCK>                        7,321,521
<SHARES-COMMON-PRIOR>                          333,347
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                     42,543,211
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   101,642,266
<NET-ASSETS>                               306,192,711
<DIVIDEND-INCOME>                              229,359
<INTEREST-INCOME>                              828,178
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               2,088,081
<NET-INVESTMENT-INCOME>                    (1,030,544)
<REALIZED-GAINS-CURRENT>                    59,817,958
<APPREC-INCREASE-CURRENT>                   11,271,260
<NET-CHANGE-FROM-OPS>                       70,058,674
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                     6,351,645
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        524,385
<NUMBER-OF-SHARES-REDEEMED>                    903,160
<SHARES-REINVESTED>                            393,936
<NET-CHANGE-IN-ASSETS>                     297,599,181
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    (319,961)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        1,035,619
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              2,129,592
<AVERAGE-NET-ASSETS>                        49,225,538
<PER-SHARE-NAV-BEGIN>                            11.55
<PER-SHARE-NII>                                 (0.17)
<PER-SHARE-GAIN-APPREC>                           6.55
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.92
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              17.01
<EXPENSE-RATIO>                                   2.12


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS SMALL CAP GROWTH FUND - CLASS O
<SERIES>
   <NUMBER> 011
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                      209,094,444
<INVESTMENTS-AT-VALUE>                     311,764,049
<RECEIVABLES>                                  391,984
<ASSETS-OTHER>                                     440
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             312,156,473
<PAYABLE-FOR-SECURITIES>                     3,009,371
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    2,954,391
<TOTAL-LIABILITIES>                          5,963,762
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   162,007,234
<SHARES-COMMON-STOCK>                            3,844
<SHARES-COMMON-PRIOR>                            5,754
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                     42,543,211
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   101,642,266
<NET-ASSETS>                               306,192,711
<DIVIDEND-INCOME>                              229,359
<INTEREST-INCOME>                              828,178
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               2,088,081
<NET-INVESTMENT-INCOME>                    (1,030,544)
<REALIZED-GAINS-CURRENT>                    59,817,958
<APPREC-INCREASE-CURRENT>                   11,271,260
<NET-CHANGE-FROM-OPS>                       70,058,674
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                         1,195
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          3,013
<NUMBER-OF-SHARES-REDEEMED>                      5,000
<SHARES-REINVESTED>                                 76
<NET-CHANGE-IN-ASSETS>                     297,599,181
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                    (319,961)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        1,035,619
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              2,129,592
<AVERAGE-NET-ASSETS>                            34,428
<PER-SHARE-NAV-BEGIN>                            11.60
<PER-SHARE-NII>                                 (0.06)
<PER-SHARE-GAIN-APPREC>                           6.67
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.92
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              17.29
<EXPENSE-RATIO>                                   1.24


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS STRATEGIC BOND FUND - CLASS 2
<SERIES>
   <NUMBER> 008
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                      120,720,383
<INVESTMENTS-AT-VALUE>                     116,079,884
<RECEIVABLES>                                2,819,231
<ASSETS-OTHER>                                   6,213
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             118,905,328
<PAYABLE-FOR-SECURITIES>                     6,165,588
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    1,428,288
<TOTAL-LIABILITIES>                          7,593,876
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   122,103,171
<SHARES-COMMON-STOCK>                        2,323,604
<SHARES-COMMON-PRIOR>                        2,684,036
<ACCUMULATED-NII-CURRENT>                    (701,425)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                    (5,425,039)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   (4,665,255)
<NET-ASSETS>                               111,311,452
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                           11,910,091
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               2,104,046
<NET-INVESTMENT-INCOME>                      9,806,045
<REALIZED-GAINS-CURRENT>                   (3,147,402)
<APPREC-INCREASE-CURRENT>                  (1,822,047)
<NET-CHANGE-FROM-OPS>                        4,836,596
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                  (1,968,767)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        449,804
<NUMBER-OF-SHARES-REDEEMED>                    917,115
<SHARES-REINVESTED>                            106,879
<NET-CHANGE-IN-ASSETS>                     (6,436,154)
<ACCUMULATED-NII-PRIOR>                      (925,830)
<ACCUMULATED-GAINS-PRIOR>                  (2,542,836)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          935,416
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              2,336,888
<AVERAGE-NET-ASSETS>                        25,217,472
<PER-SHARE-NAV-BEGIN>                            10.18
<PER-SHARE-NII>                                   0.83
<PER-SHARE-GAIN-APPREC>                         (0.40)
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.77
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               9.84
<EXPENSE-RATIO>                                   1.76


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS STRATEGIC BOND FUND - CLASS A
<SERIES>
   <NUMBER> 008
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                      120,720,383
<INVESTMENTS-AT-VALUE>                     116,079,884
<RECEIVABLES>                                2,819,231
<ASSETS-OTHER>                                   6,213
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             118,905,328
<PAYABLE-FOR-SECURITIES>                     6,165,588
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    1,428,288
<TOTAL-LIABILITIES>                          7,593,876
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   122,103,171
<SHARES-COMMON-STOCK>                        1,893,584
<SHARES-COMMON-PRIOR>                        2,159,481
<ACCUMULATED-NII-CURRENT>                    (701,425)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                    (5,425,039)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   (4,665,255)
<NET-ASSETS>                               111,311,452
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                           11,910,091
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               2,104,046
<NET-INVESTMENT-INCOME>                      9,806,045
<REALIZED-GAINS-CURRENT>                   (3,147,402)
<APPREC-INCREASE-CURRENT>                  (1,822,047)
<NET-CHANGE-FROM-OPS>                        4,836,596
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                  (1,848,302)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        717,729
<NUMBER-OF-SHARES-REDEEMED>                  1,090,797
<SHARES-REINVESTED>                            107,171
<NET-CHANGE-IN-ASSETS>                     (6,436,154)
<ACCUMULATED-NII-PRIOR>                      (925,830)
<ACCUMULATED-GAINS-PRIOR>                  (2,542,836)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          935,416
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              2,336,888
<AVERAGE-NET-ASSETS>                        21,328,758
<PER-SHARE-NAV-BEGIN>                            10.19
<PER-SHARE-NII>                                   0.88
<PER-SHARE-GAIN-APPREC>                         (0.41)
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.85
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               9.81
<EXPENSE-RATIO>                                   1.24


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS STRATEGIC BOND FUND - CLASS B
<SERIES>
   <NUMBER> 008
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                      120,720,383
<INVESTMENTS-AT-VALUE>                     116,079,884
<RECEIVABLES>                                2,819,231
<ASSETS-OTHER>                                   6,213
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             118,905,328
<PAYABLE-FOR-SECURITIES>                     6,165,588
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    1,428,288
<TOTAL-LIABILITIES>                          7,593,876
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   122,103,171
<SHARES-COMMON-STOCK>                        7,065,838
<SHARES-COMMON-PRIOR>                        6,675,362
<ACCUMULATED-NII-CURRENT>                    (701,425)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                    (5,425,039)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   (4,665,255)
<NET-ASSETS>                               111,311,452
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                           11,910,091
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               2,104,046
<NET-INVESTMENT-INCOME>                      9,806,045
<REALIZED-GAINS-CURRENT>                   (3,147,402)
<APPREC-INCREASE-CURRENT>                  (1,822,047)
<NET-CHANGE-FROM-OPS>                        4,836,596
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                  (5,452,592)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      1,805,183
<NUMBER-OF-SHARES-REDEEMED>                  1,626,669
<SHARES-REINVESTED>                            211,962
<NET-CHANGE-IN-ASSETS>                     (6,436,154)
<ACCUMULATED-NII-PRIOR>                      (925,830)
<ACCUMULATED-GAINS-PRIOR>                  (2,542,836)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          935,416
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              2,336,888
<AVERAGE-NET-ASSETS>                        69,846,866
<PER-SHARE-NAV-BEGIN>                            10.18
<PER-SHARE-NII>                                   0.81
<PER-SHARE-GAIN-APPREC>                         (0.41)
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.77
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               9.81
<EXPENSE-RATIO>                                   1.99


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS STRATEGIC BOND FUND - CLASS O
<SERIES>
   <NUMBER> 008
   <NAME> SALOMON BROTHERS INVESTMENT SERIES FUNDS INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                      120,720,383
<INVESTMENTS-AT-VALUE>                     116,079,884
<RECEIVABLES>                                2,819,231
<ASSETS-OTHER>                                   6,213
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             118,905,328
<PAYABLE-FOR-SECURITIES>                     6,165,588
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    1,428,288
<TOTAL-LIABILITIES>                          7,593,876
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   122,103,171
<SHARES-COMMON-STOCK>                           60,629
<SHARES-COMMON-PRIOR>                           48,945
<ACCUMULATED-NII-CURRENT>                    (701,425)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                    (5,425,039)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   (4,665,255)
<NET-ASSETS>                               111,311,452
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                           11,910,091
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               2,104,046
<NET-INVESTMENT-INCOME>                      9,806,045
<REALIZED-GAINS-CURRENT>                   (3,147,402)
<APPREC-INCREASE-CURRENT>                  (1,822,047)
<NET-CHANGE-FROM-OPS>                        4,836,596
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                     (46,780)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          9,791
<NUMBER-OF-SHARES-REDEEMED>                      1,544
<SHARES-REINVESTED>                              3,437
<NET-CHANGE-IN-ASSETS>                     (6,436,154)
<ACCUMULATED-NII-PRIOR>                      (925,830)
<ACCUMULATED-GAINS-PRIOR>                  (2,542,836)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          935,416
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              2,336,888
<AVERAGE-NET-ASSETS>                           522,178
<PER-SHARE-NAV-BEGIN>                            10.18
<PER-SHARE-NII>                                   0.91
<PER-SHARE-GAIN-APPREC>                         (0.41)
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.88
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               9.80
<EXPENSE-RATIO>                                   0.99


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS U.S. GOVERNMENT INCOME FUND - CLASS 2
<SERIES>
   <NUMBER> 006
   <NAME> SALOMON BROTHERS INVESTMENT SERIES INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                       31,485,963
<INVESTMENTS-AT-VALUE>                      30,891,649
<RECEIVABLES>                                1,449,177
<ASSETS-OTHER>                                   5,207
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              32,346,033
<PAYABLE-FOR-SECURITIES>                     1,471,188
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      349,700
<TOTAL-LIABILITIES>                          1,820,888
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    31,600,759
<SHARES-COMMON-STOCK>                          542,643
<SHARES-COMMON-PRIOR>                          458,725
<ACCUMULATED-NII-CURRENT>                    (106,195)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      (375,105)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     (594,314)
<NET-ASSETS>                                30,525,145
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                            1,960,940
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 398,671
<NET-INVESTMENT-INCOME>                      1,562,269
<REALIZED-GAINS-CURRENT>                     (331,384)
<APPREC-INCREASE-CURRENT>                    (930,757)
<NET-CHANGE-FROM-OPS>                          300,128
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      255,303
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        349,784
<NUMBER-OF-SHARES-REDEEMED>                    281,660
<SHARES-REINVESTED>                             15,794
<NET-CHANGE-IN-ASSETS>                         421,457
<ACCUMULATED-NII-PRIOR>                       (50,677)
<ACCUMULATED-GAINS-PRIOR>                      (1,375)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          200,629
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                652,881
<AVERAGE-NET-ASSETS>                         4,997,822
<PER-SHARE-NAV-BEGIN>                            10.28
<PER-SHARE-NII>                                   0.49
<PER-SHARE-GAIN-APPREC>                         (0.40)
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<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               9.86
<EXPENSE-RATIO>                                   1.37


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS U.S. GOVERNMENT INCOME FUND - CLASS A
<SERIES>
   <NUMBER> 006
   <NAME> SALOMON BROTHERS INVESTMENT SERIES INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                       31,485,963
<INVESTMENTS-AT-VALUE>                      30,891,649
<RECEIVABLES>                                1,449,177
<ASSETS-OTHER>                                   5,207
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              32,346,033
<PAYABLE-FOR-SECURITIES>                     1,471,188
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      349,700
<TOTAL-LIABILITIES>                          1,820,888
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    31,600,759
<SHARES-COMMON-STOCK>                          586,478
<SHARES-COMMON-PRIOR>                          655,867
<ACCUMULATED-NII-CURRENT>                    (106,195)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      (375,105)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     (594,314)
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<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                            1,960,940
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 398,671
<NET-INVESTMENT-INCOME>                      1,562,269
<REALIZED-GAINS-CURRENT>                     (331,384)
<APPREC-INCREASE-CURRENT>                    (930,757)
<NET-CHANGE-FROM-OPS>                          300,128
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      393,854
<DISTRIBUTIONS-OF-GAINS>                             0
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<NUMBER-OF-SHARES-SOLD>                        514,105
<NUMBER-OF-SHARES-REDEEMED>                    606,035
<SHARES-REINVESTED>                             22,541
<NET-CHANGE-IN-ASSETS>                         421,457
<ACCUMULATED-NII-PRIOR>                       (50,677)
<ACCUMULATED-GAINS-PRIOR>                      (1,375)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          200,629
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                652,881
<AVERAGE-NET-ASSETS>                         6,708,565
<PER-SHARE-NAV-BEGIN>                            10.28
<PER-SHARE-NII>                                   0.54
<PER-SHARE-GAIN-APPREC>                         (0.39)
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<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               9.84
<EXPENSE-RATIO>                                   0.85


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS U.S. GOVERNMENT INCOME FUND - CLASS B
<SERIES>
   <NUMBER> 006
   <NAME> SALOMON BROTHERS INVESTMENT SERIES INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                       31,485,963
<INVESTMENTS-AT-VALUE>                      30,891,649
<RECEIVABLES>                                1,449,177
<ASSETS-OTHER>                                   5,207
<OTHER-ITEMS-ASSETS>                                 0
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<PAYABLE-FOR-SECURITIES>                     1,471,188
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      349,700
<TOTAL-LIABILITIES>                          1,820,888
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    31,600,759
<SHARES-COMMON-STOCK>                        1,635,618
<SHARES-COMMON-PRIOR>                        1,488,893
<ACCUMULATED-NII-CURRENT>                    (106,195)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      (375,105)
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<ACCUM-APPREC-OR-DEPREC>                     (594,314)
<NET-ASSETS>                                30,525,145
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                            1,960,940
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 398,671
<NET-INVESTMENT-INCOME>                      1,562,269
<REALIZED-GAINS-CURRENT>                     (331,384)
<APPREC-INCREASE-CURRENT>                    (930,757)
<NET-CHANGE-FROM-OPS>                          300,128
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      806,461
<DISTRIBUTIONS-OF-GAINS>                             0
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<NUMBER-OF-SHARES-SOLD>                        912,987
<NUMBER-OF-SHARES-REDEEMED>                    812,174
<SHARES-REINVESTED>                             45,912
<NET-CHANGE-IN-ASSETS>                         421,457
<ACCUMULATED-NII-PRIOR>                       (50,677)
<ACCUMULATED-GAINS-PRIOR>                      (1,375)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
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<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                652,881
<AVERAGE-NET-ASSETS>                        15,820,133
<PER-SHARE-NAV-BEGIN>                            10.29
<PER-SHARE-NII>                                   0.49
<PER-SHARE-GAIN-APPREC>                         (0.42)
<PER-SHARE-DIVIDEND>                              0.51
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               9.85
<EXPENSE-RATIO>                                   1.60


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> SALOMON BROTHERS U.S. GOVERNMENT INCOME FUND - CLASS 2
<SERIES>
   <NUMBER> 006
   <NAME> SALOMON BROTHERS INVESTMENT SERIES INC.

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                       31,485,963
<INVESTMENTS-AT-VALUE>                      30,891,649
<RECEIVABLES>                                1,449,177
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<OTHER-ITEMS-ASSETS>                                 0
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<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      349,700
<TOTAL-LIABILITIES>                          1,820,888
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    31,600,759
<SHARES-COMMON-STOCK>                          334,629
<SHARES-COMMON-PRIOR>                          323,740
<ACCUMULATED-NII-CURRENT>                    (106,195)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      (375,105)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     (594,314)
<NET-ASSETS>                                30,525,145
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                            1,960,940
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 398,671
<NET-INVESTMENT-INCOME>                      1,562,269
<REALIZED-GAINS-CURRENT>                     (331,384)
<APPREC-INCREASE-CURRENT>                    (930,757)
<NET-CHANGE-FROM-OPS>                          300,128
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      204,515
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<NUMBER-OF-SHARES-SOLD>                         13,145
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<SHARES-REINVESTED>                              1,572
<NET-CHANGE-IN-ASSETS>                         421,457
<ACCUMULATED-NII-PRIOR>                       (50,677)
<ACCUMULATED-GAINS-PRIOR>                      (1,375)
<OVERDISTRIB-NII-PRIOR>                              0
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<GROSS-EXPENSE>                                652,881
<AVERAGE-NET-ASSETS>                         3,340,552
<PER-SHARE-NAV-BEGIN>                            10.29
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<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               9.85
<EXPENSE-RATIO>                                   0.60


</TABLE>


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