MORGAN STANLEY DEAN WITTER VARIABLE INVESTMENT SERIES
NSAR-A, 1999-08-30
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<PAGE>      PAGE  1
000 A000000 06/30/1999
000 C000000 0000716716
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 MSDW VARIABLE INVESTMENT SERIES
001 B000000 811-3692
001 C000000 2123922550
002 A000000 TWO 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 16
007 C010100  1
007 C020100 MONEY MARKET PORTFOLIO
007 C030100 N
007 C010200  2
007 C020200 QUALITY INCOME PLUS PORTFOLIO
007 C030200 N
007 C010300  3
007 C020300 HIGH YIELD PORTFOLIO
007 C030300 N
007 C010400  4
007 C020400 UTILITIES PORTFOLIO
007 C030400 N
007 C010500  5
007 C020500 DIVIDEND GROWTH PORTFOLIO
007 C030500 N
007 C010600  6
007 C020600 CAPITAL GROWTH PORTFOLIO
007 C030600 N
007 C010700  7
007 C020700 EUROPEAN GROWTH PORTFOLIO
007 C030700 N
007 C010800  8
007 C020800 EQUITY PORTFOLIO
007 C030800 N
007 C010900  9
007 C020900 STRATEGIST PORTFOLIO
007 C030900 N
007 C011000 10
007 C021000 GLOBAL DIVIDEND GROWTH PORTFOLIO
<PAGE>      PAGE  2
007 C031000 N
007 C011100 11
007 C021100 PACIFIC GROWTH PORTFOLIO
007 C031100 N
007 C011200 12
007 C021200 SHORT-TERM BOND PORTFOLIO
007 C031200 N
007 C011300 13
007 C021300 INCOME BUILDER PORTFOLIO
007 C031300 N
007 C011400 14
007 C021400 S&P 500 INDEX PORTFOLIO
007 C031400 N
007 C011500 15
007 C021500 COMPETITIVE EDGE "BEST IDEAS" PORTFOLIO
007 C031500 N
007 C011600 16
007 C021600 AGGRESSIVE EQUITY PORTFOLIO
007 C031600 N
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
007 C012900 29
007 C013000 30
007 C013100 31
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
011 A00AA01 MORGAN STANLEY DEAN WITTER DISTRIBUTORS INC.
011 B00AA01 8-45262
011 C01AA01 NEW YORK
011 C02AA01 NY
011 C03AA01 10048
012 A00AA01 MORGAN STANLEY DEAN WITTER TRUST FSB
012 B00AA01 84-1785
012 C01AA01 JERSEY CITY
<PAGE>      PAGE  3
012 C02AA01 NJ
012 C03AA01 07311
013 A00AA01 PRICEWATERHOUSECOOPERS LLP
013 B01AA01 NEW YORK
013 B02AA01 NY
013 B03AA01 10036
014 A00AA01 DEAN WITTER REYNOLDS INC.
014 B00AA01 8-14172
014 A00AA02 MORGAN STANLEY INCORPORATED
014 B00AA02 8-15869000
014 A00AA03 DELETE
014 A00AA04 DELETE
014 A00AA05 DELETE
014 A00AA06 DELETE
014 A00AA07 DELETE
014 A00AA08 DELETE
014 A00AA09 DELETE
014 A00AA10 DELETE
014 A00AA11 DELETE
014 A00AA12 DELETE
014 A00AA13 DELETE
014 A00AA14 DELETE
014 A00AA15 DELETE
014 A00AA16 DELETE
014 A00AA17 DELETE
014 A00AA18 DELETE
014 A00AA19 DELETE
014 A00AA20 DELETE
014 A00AA21 DELETE
014 A00AA22 DELETE
018  00AA00 Y
019 A00AA00 Y
019 B00AA00  119
019 C00AA00 MSDW-FUNDS
020 A000001 MORGAN STANLEY & CO., INC.
020 B000001 13-2655998
020 C000001    737
020 A000002 MERRILL LYNCH, PIERCE, FENNER & SMITH
020 B000002 13-5674085
020 C000002    468
020 A000003 LEHMAN BROTHERS INC.
020 B000003 13-2518466
020 C000003    415
020 A000004 GOLDMAN, SACHS & CO.
020 B000004 13-5108880
020 C000004    403
020 A000005 SALOMON SMITH BARNEY
020 B000005 13-1912900
020 C000005    357
020 A000006 WARBURG DILLION READ LLC
020 B000006 13-3873456
<PAGE>      PAGE  4
020 C000006    331
020 A000007 DONALDSON, LUFKIN & JENRETTE SEC
020 B000007 13-2741729
020 C000007    327
020 A000008 DEAN WITTER REYNOLDS
020 B000008 94-1671384
020 C000008    318
020 A000009 SCHRODER WERTHEIM & CO., INC.
020 B000009 13-2697272
020 C000009    301
020 A000010 MORGAN (J.P.) SEC. INC.
020 B000010 13-3224016
020 C000010    301
021  000000     7816
022 A000001 GOLDMAN, SACHS & CO.
022 B000001 13-5108880
022 C000001  16986864
022 D000001    143920
022 A000002 BANC OF AMERICA SECURITIES LLC
022 B000002 56-2058405
022 C000002   6930126
022 D000002    112498
022 A000003 MERRILL LYNCH, PIERCE, FENNER & SMITH INC.
022 B000003 13-5674085
022 C000003   5805272
022 D000003    142121
022 A000004 BANK OF NEW YORK (THE)
022 B000004 13-5160382
022 C000004   2977933
022 D000004         0
022 A000005 LEHMAN BROTHERS
022 B000005 13-2518466
022 C000005    752819
022 D000005    275529
022 A000006 BANC OF AMERICA NT & SA
022 B000006 94-1687665
022 C000006    550150
022 D000006         0
022 A000007 MORGAN (J.P.) SECURITIES
022 B000007 13-3224016
022 C000007    490039
022 D000007     22675
022 A000008 PAINEWEBBER, INC.
022 B000008 13-2638166
022 C000008    173375
022 D000008    220112
022 A000009 SALOMON SMITH BARNEY
022 B000009 13-1912900
022 C000009    177082
022 D000009    139813
022 A000010 SALOMON BROTHERS, INC.
<PAGE>      PAGE  5
022 B000010 13-3082694
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<PAGE>      PAGE  6
054 L00AA00 Y
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<PAGE>      PAGE  7
086 E020000      0
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008 A000101 MORGAN STANLEY DEAN WITTER ADVISORS INC.
008 B000101 A
008 C000101 801-42061
008 D010101 NEW YORK
008 D020101 NY
008 D030101 10048
015 A000101 THE BANK OF NEW YORK
015 B000101 C
015 C010101 NEW YORK
015 C020101 NY
015 C030101 10286
015 E010101 X
024  000100 N
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<PAGE>      PAGE  8
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<PAGE>      PAGE  9
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068 A000100 N
068 B000100 N
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070 B020100 N
070 C010100 N
070 C020100 N
070 D010100 N
070 D020100 N
070 E010100 N
070 E020100 N
070 F010100 N
070 F020100 N
070 G010100 N
070 G020100 N
070 H010100 N
070 H020100 N
070 I010100 N
070 I020100 N
070 J010100 N
070 J020100 N
070 K010100 N
070 K020100 N
070 L010100 N
070 L020100 N
070 M010100 N
070 M020100 N
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070 N020100 N
070 O010100 N
070 O020100 N
070 P010100 Y
070 P020100 N
070 Q010100 N
070 Q020100 N
070 R010100 N
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<PAGE>      PAGE  10
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<PAGE>      PAGE  11
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008 A000201 MORGAN STANLEY DEAN WITTER ADVISORS INC.
008 B000201 A
008 C000201 801-42061
008 D010201 NEW YORK
008 D020201 NY
008 D030201 10048
015 A000201 THE BANK OF NEW YORK
015 B000201 C
015 C010201 NEW YORK
015 C020201 NY
015 C030201 10286
015 E010201 X
024  000200 Y
025 A000201 DONALD LUFKIN & JENRETTE, INC.
025 B000201 13-2741729
025 C000201 D
025 D000201    4873
025 A000202 GOLDMAN SACHS GROUP
025 B000202 13-5108880
025 C000202 D
025 D000202    4834
025 A000203 LEHMAN BROTHERS
025 B000203 13-2518466
025 C000203 D
025 D000203   11007
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<PAGE>      PAGE  12
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045  000200 Y
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<PAGE>      PAGE  13
048 J010200        0
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070 A010200 Y
070 A020200 Y
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<PAGE>      PAGE  14
070 F020200 N
070 G010200 Y
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070 H020200 N
070 I010200 Y
070 I020200 N
070 J010200 Y
070 J020200 Y
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070 L020200 Y
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<PAGE>      PAGE  15
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008 A000301 MORGAN STANLEY DEAN WITTER ADVISORS INC.
008 B000301 A
008 C000301 801-42061
<PAGE>      PAGE  16
008 D010301 NEW YORK
008 D020301 NY
008 D030301 10048
015 A000301 THE BANK OF NEW YORK
015 B000301 C
015 C010301 NEW YORK
015 C020301 NY
015 C030301 10286
015 E010301 X
024  000300 Y
025 A000301 BANK OF NEW YORK (THE)
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<PAGE>      PAGE  17
046  000300 N
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050  000300 N
051  000300 N
052  000300 N
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<PAGE>      PAGE  18
062 R000300   0.0
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070 E020300 N
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070 F020300 N
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<PAGE>      PAGE  19
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<PAGE>      PAGE  22
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<PAGE>      PAGE  24
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<PAGE>      PAGE  36
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<PAGE>      PAGE  38
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<PAGE>      PAGE  40
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<PAGE>      PAGE  41
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<PAGE>      PAGE  50
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<PAGE>      PAGE  56
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008 B001201 A
008 C001201 801-42061
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008 D031201 10048
015 A001201 THE BANK OF NEW YORK
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<PAGE>      PAGE  57
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050  001200 N
051  001200 N
052  001200 N
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<PAGE>      PAGE  58
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070 B021200 N
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070 Q021200 N
070 R011200 N
070 R021200 N
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<PAGE>      PAGE  59
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<PAGE>      PAGE  60
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008 B001301 A
008 C001301 801-42061
008 D011301 NEW YORK
008 D021301 NY
008 D031301 10048
015 A001301 THE BANK OF NEW YORK
015 B001301 C
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015 C021301 NY
015 C031301 10268
015 E011301 X
024  001300 Y
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025 A001302 DELETE
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<PAGE>      PAGE  61
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045  001300 Y
046  001300 N
047  001300 Y
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048 I021300 0.000
048 J011300        0
048 J021300 0.000
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048 K021300 0.000
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<PAGE>      PAGE  62
050  001300 N
051  001300 N
052  001300 N
053 A001300 N
055 A001300 N
055 B001300 N
056  001300 Y
057  001300 N
062 A001300 N
062 B001300   0.0
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062 P001300   0.0
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062 R001300   0.0
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066 A001300 Y
066 B001300 N
066 C001300 N
066 D001300 N
066 E001300 Y
066 F001300 N
066 G001300 N
067  001300 N
068 A001300 N
068 B001300 N
069  001300 N
070 A011300 Y
070 A021300 Y
070 B011300 N
070 B021300 N
070 C011300 N
070 C021300 N
070 D011300 N
070 D021300 N
070 E011300 N
070 E021300 N
070 F011300 N
070 F021300 N
<PAGE>      PAGE  63
070 G011300 N
070 G021300 N
070 H011300 N
070 H021300 N
070 I011300 N
070 I021300 N
070 J011300 Y
070 J021300 Y
070 K011300 N
070 K021300 N
070 L011300 Y
070 L021300 Y
070 M011300 N
070 M021300 N
070 N011300 Y
070 N021300 N
070 O011300 Y
070 O021300 N
070 P011300 Y
070 P021300 N
070 Q011300 N
070 Q021300 N
070 R011300 N
070 R021300 N
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<PAGE>      PAGE  64
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008 A001401 MORGAN STANLEY DEAN WITTER ADVISORS INC.
008 B001401 A
008 C001401 801-42061
008 D011401 NEW YORK
<PAGE>      PAGE  65
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008 D031401 10048
015 A001401 THE BANK OF NEW YORK
015 B001401 C
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015 C021401 NY
015 C031401 10268
015 E011401 X
024  001400 Y
025 A001401 LEHMAN BROTHERS
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025 A001404 PAINE WEBBER GROUP, INC.
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<PAGE>      PAGE  66
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048 I021400 0.000
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048 J021400 0.000
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048 K021400 0.000
049  001400 N
050  001400 N
051  001400 N
052  001400 N
053 A001400 N
055 A001400 N
055 B001400 N
056  001400 Y
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<PAGE>      PAGE  67
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066 D001400 N
066 E001400 N
066 F001400 N
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068 A001400 N
068 B001400 N
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070 A011400 Y
070 A021400 Y
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070 C011400 N
070 C021400 N
070 D011400 N
070 D021400 N
070 E011400 N
070 E021400 N
070 F011400 Y
070 F021400 Y
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070 G021400 N
070 H011400 N
070 H021400 N
070 I011400 N
070 I021400 N
070 J011400 N
070 J021400 N
070 K011400 Y
070 K021400 N
070 L011400 Y
070 L021400 Y
070 M011400 N
070 M021400 N
070 N011400 Y
070 N021400 N
<PAGE>      PAGE  68
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070 Q021400 N
070 R011400 N
070 R021400 N
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<PAGE>      PAGE  69
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008 A001501 MORGAN STANLEY DEAN WITTER ADVISORS INC.
008 B001501 A
008 C001501 801-42061
008 D011501 NEW YORK
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008 D031501 10048
015 A001501 THE BANK OF NEW YORK
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<PAGE>      PAGE  70
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<PAGE>      PAGE  71
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048 I021500 0.000
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050  001500 N
051  001500 N
052  001500 N
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056  001500 Y
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066 C001500 N
066 D001500 Y
066 E001500 N
066 F001500 N
066 G001500 N
067  001500 N
068 A001500 N
068 B001500 N
069  001500 N
<PAGE>      PAGE  72
070 A011500 Y
070 A021500 Y
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<PAGE>      PAGE  73
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074 U011500     4135
074 U021500        0
<PAGE>      PAGE  74
074 V011500    10.42
074 V021500     0.00
074 W001500   0.0000
074 X001500     2777
074 Y001500        0
075 A001500        0
075 B001500    39229
076  001500     0.00
008 A001601 MORGAN STANLEY DEAN WITTER ADVISORS INC.
008 B001601 A
008 C001601 801-42061
008 D011601 NEW YORK
008 D021601 NY
008 D031601 10048
015 A001601 THE BANK OF NEW YORK
015 B001601 C
015 C011601 NEW YORK
015 C021601 NY
015 C031601 10268
015 E011601 X
024  001600 Y
025 A001601 GOLDMAN SACHS & CO.
025 B001601 13-5108880
025 C001601 E
025 D001601      16
025 D001602       0
025 D001603       0
025 D001604       0
025 D001605       0
025 D001606       0
025 D001607       0
025 D001608       0
028 A011600         0
028 A021600         0
028 A031600         0
028 A041600         0
028 B011600         0
028 B021600         0
028 B031600         0
028 B041600         0
028 C011600         0
028 C021600         0
028 C031600         0
028 C041600         0
028 D011600         0
028 D021600         0
028 D031600         0
028 D041600         0
028 E011600      1950
028 E021600         0
028 E031600         0
<PAGE>      PAGE  75
028 E041600       330
028 F011600      2061
028 F021600         8
028 F031600         0
028 F041600       544
028 G011600      4011
028 G021600         8
028 G031600         0
028 G041600       874
028 H001600         0
045  001600 Y
046  001600 N
047  001600 Y
048  001600  0.075
048 A011600        0
048 A021600 0.000
048 B011600        0
048 B021600 0.000
048 C011600        0
048 C021600 0.000
048 D011600        0
048 D021600 0.000
048 E011600        0
048 E021600 0.000
048 F011600        0
048 F021600 0.000
048 G011600        0
048 G021600 0.000
048 H011600        0
048 H021600 0.000
048 I011600        0
048 I021600 0.000
048 J011600        0
048 J021600 0.000
048 K011600        0
048 K021600 0.000
049  001600 N
050  001600 N
051  001600 N
052  001600 N
053 A001600 N
055 A001600 N
055 B001600 N
062 A001600 N
062 B001600   0.0
062 C001600   0.0
062 D001600   0.0
062 E001600   0.0
062 F001600   0.0
062 G001600   0.0
062 H001600   0.0
<PAGE>      PAGE  76
062 I001600   0.0
062 J001600   0.0
062 K001600   0.0
062 L001600   0.0
062 M001600   0.0
062 N001600   0.0
062 O001600   0.0
062 P001600   0.0
062 Q001600   0.0
062 R001600   0.0
063 A001600   0
063 B001600  0.0
066 A001600 Y
066 D001600 Y
067  001600 N
068 A001600 N
068 B001600 N
069  001600 N
070 A011600 Y
070 A021600 Y
070 B011600 Y
070 B021600 N
070 C011600 Y
070 C021600 N
070 D011600 Y
070 D021600 N
070 E011600 Y
070 E021600 N
070 F011600 Y
070 F021600 Y
070 G011600 Y
070 G021600 N
070 H011600 Y
070 H021600 N
070 I011600 Y
070 I021600 N
070 J011600 Y
070 J021600 N
070 K011600 Y
070 K021600 N
070 L011600 Y
070 L021600 Y
070 M011600 Y
070 M021600 N
070 N011600 Y
070 N021600 N
070 O011600 Y
070 O021600 N
070 P011600 Y
070 P021600 Y
070 Q011600 N
<PAGE>      PAGE  77
070 Q021600 N
070 R011600 N
070 R021600 N
071 A001600      2260
071 B001600       244
071 C001600      1273
071 D001600   19
072 A001600  2
072 B001600        7
072 C001600        1
072 D001600        0
072 E001600        0
072 F001600        0
072 G001600        2
072 H001600        0
072 I001600        0
072 J001600        1
072 K001600        0
072 L001600        0
072 M001600        0
072 N001600        0
072 O001600        0
072 P001600        0
072 Q001600        0
072 R001600        5
072 S001600        0
072 T001600        0
072 U001600        0
072 V001600        0
072 W001600        0
072 X001600        8
072 Y001600        8
072 Z001600        8
072AA001600        3
072BB001600       19
072CC011600      103
072CC021600        0
072DD011600        8
072DD021600        0
072EE001600        0
073 A011600   0.0264
073 A021600   0.0000
073 B001600   0.0000
073 C001600   0.0000
074 A001600       22
074 B001600        0
074 C001600     1650
074 D001600        0
074 E001600        0
074 F001600     2105
074 G001600        0
<PAGE>      PAGE  78
074 H001600        0
074 I001600        0
074 J001600       28
074 K001600       40
074 L001600      104
074 M001600        0
074 N001600     3949
074 O001600      257
074 P001600      442
074 Q001600        0
074 R011600        0
074 R021600        0
074 R031600        0
074 R041600       17
074 S001600        0
074 T001600     3233
074 U011600      317
074 U021600        0
074 V011600    10.20
074 V021600     0.00
074 W001600   0.0000
074 X001600      257
074 Y001600        0
075 A001600        0
075 B001600     1681
076  001600     0.00
SIGNATURE   BARRY FINK
TITLE       VICE PRESIDENT



EXHIBIT 77(0) Morgan Stanley Dean Witter Variable Investment
 Series 10f-3 Transactions TOTAL ISSUED SECURITY DATE PRICE
 SHARES % OF PRINCIPAL PURCHASED PURCHASED SHARES PURCHASED
ASSETS AMOUNT BY FUND BROKER(S) Capital Appreciation Series:
  Perot Systems 2/1/99 $16.00 100 .005% $104,000,000 .002%
     Warburg Dillon Read Capital Growth Series: Brocade
Communications Systems 5/24/99 $19.00 800 .011% $61,750,000
   .025% Friend Co. DLJ Direct 5/25/99 $20.00 1,900 .028%
$320,000,000 .012% DLJ Dycom Industries 5/13/99 $48.50 6,000
   .199% $130,950,000 .222% Bank of American Sec. Lowe's
Companies, Inc.2/24/99 $58.00 4,000 .171% $319,000,000 .073%
Merrill Lynch Marimba 4/29/99 $20.00 1,300 .018% $80,000,000
 .033% Soundview The Goldman Sachs 5/3/99 $53.00 11,600 .422%
   $3,657,000 .017% Goldman Sachs Dividend Growth Series:
   Delphi Automotive Systems Corp. 2/4/99 $17.00 145,000
  .110%$1,700,000,000 .145% Schroder & Co. Equity Series:
Autobytel.com 3/26/99 $23.00 12,700 .022% $103,500,000 .025%
  BT Alex Brown Autoweb.com 3/22/99 $14.00 10,800 .011% $
   70,000,000 .216% Piper Jaffray Brocade Communications
Systems 5/24/99 $19.00 5,200 .007% $61,750,000 .160% Friend
  Co. Copper Mountain Networks, Inc. 5/12/99 $21.00 4,600
 .007% $84,000,000 .115% Raymond James Marimba 4/29/99 $20.00
  9,800 .014% $80,000,000 .245% Soundview MarketWatch.com
 1/15/99 $17.00 3,900 .005% $46,750,000 .098% BT Alex Brown
Media Metrix 5/7/99 $17.00 6,400 .008% $51,000,000 .213 DLJ
 Perot Systems 2/1/99 $16.00 4,400 .006% $104,000,000 .068%
  Warburg Dillon Read Smith-Gardner 1/29/99 $12.00 10,400
  .010% $52,920,000 .236% BT Alex Brown United Pan-Europe
  Communications 2/11/99 $32.78 33,500 .093% $131,120,000
  .838% Goldman Sachs Vignette Corp. 2/18/99 $19.00 6,900
 .011% $76,000,000 .173% Soundview Ziff-Davis Inc. 3/30/99
$19.00 18,100 .026% $19,000,000 1.810% Goldman Sachs Pacific
  Growth Series: Korea Telecom Corp. 3/26/99 $12.00 22,700
  .845% $753,800,000 .074% Ing Baring USD Quality Series:
  Baker Hughes Inc. 6 7/8 1/15/29 1/14/99 $98.50 2,000,000
 .362% $400,000,000 .276% Chase Continental 7.056 3/15/2011
  6/30/99 $100.00 1,000,000 .191% $192,425,000 .520% First
Boston Goldman Sachs 6.65 5//15/09 5/12/99 $99.79 2,000,000
 .363% $1,800,000,000 .111% Goldman Sachs Province De Quebec
       5 3/4 2/15/2009 2/18/99 $99.73 3,000,000 .525%
 $1,000,000,000 .525% CS First Bostom SEARS 6.25 Notes Due
2009 4/29/99 $98.87 3,000,000 .540% $3,000,000 .400% Goldman
   Sachs Strategist Series: American General Corp.2/11/99
  $99.81 1,000,000 .150% $150,000,000 .670% DLJ Utilities
Series: Copper Mountain Networks, Inc. 5/12/99 $21.00 2,500
   .009% $84,000,000 .063% Raymond James RCN Corporation
 5/26/99 $39.00 200,000 1.335% $312,000,000 2.500% Salomon
                        Smith Barney



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

<TABLE> <S> <C>

                           EXHIBIT

    MORGAN STANLEY DEAN WITTER VARIABLE INVESTMENT SERIES


Sub-Item

77P       Information Required to be Filed Pursuant to
          Existing Exemptive Orders

(A)       Statement Pursuant to Exemptive Order (ICA Release
No. 13466)
          Pertaining to Amortized Cost Pricing

          No action was taken during the period pursuant to
          condition 2 (c) of the above-captioned Order.



</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Variable Investment Series - Aggressive Equity
Portfolio
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VAR. INVESTMENT SERIES - AGGRESSIVE EQUITY PORTFOLIO
<SERIES>
   <NUMBER> 16
   <NAME> AGGRESSIVE EQUITY PORTFOLIO

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<INVESTMENTS-AT-COST>                        3,652,009
<INVESTMENTS-AT-VALUE>                       3,755,319
<RECEIVABLES>                                  171,330
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                            22,134
<TOTAL-ASSETS>                               3,948,783
<PAYABLE-FOR-SECURITIES>                     (697,907)
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                     (17,985)
<TOTAL-LIABILITIES>                          (715,892)
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                     3,145,199
<SHARES-COMMON-STOCK>                          316,800
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                       (15,618)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       103,310
<NET-ASSETS>                                 3,232,891
<DIVIDEND-INCOME>                                  701
<INTEREST-INCOME>                                7,396
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                       0
<NET-INVESTMENT-INCOME>                          8,097
<REALIZED-GAINS-CURRENT>                      (15,618)
<APPREC-INCREASE-CURRENT>                      103,310
<NET-CHANGE-FROM-OPS>                           95,789
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      (8,097)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        403,860
<NUMBER-OF-SHARES-REDEEMED>                   (87,854)
<SHARES-REINVESTED>                                794
<NET-CHANGE-IN-ASSETS>                       3,232,881
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          (2,003)
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                (8,291)
<AVERAGE-NET-ASSETS>                         1,680,655
<PER-SHARE-NAV-BEGIN>                            10.00
<PER-SHARE-NII>                                   0.00
<PER-SHARE-GAIN-APPREC>                           0.23
<PER-SHARE-DIVIDEND>                            (0.03)
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              10.20
<EXPENSE-RATIO>                                   0.00


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Variable Investment Series - Competitive Edge Best
Ideas Portfolio
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VAR. INVESTMENT SER. - COMP.EDGE BEST IDEAS PORTFOLIO
<SERIES>
   <NUMBER> 15
   <NAME> COMPETITIVE EDGE BEST IDEAS PORTFOLIO

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<INVESTMENTS-AT-COST>                       38,421,480
<INVESTMENTS-AT-VALUE>                      43,008,376
<RECEIVABLES>                                   38,408
<ASSETS-OTHER>                                 100,797
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              43,147,581
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                     (51,790)
<TOTAL-LIABILITIES>                           (51,790)
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    39,667,273
<SHARES-COMMON-STOCK>                        4,134,682
<SHARES-COMMON-PRIOR>                        3,722,740
<ACCUMULATED-NII-CURRENT>                      228,566
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                    (1,385,798)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     4,585,750
<NET-ASSETS>                                43,095,791
<DIVIDEND-INCOME>                               69,841
<INTEREST-INCOME>                              214,698
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                (55,852)
<NET-INVESTMENT-INCOME>                        228,687
<REALIZED-GAINS-CURRENT>                     (114,422)
<APPREC-INCREASE-CURRENT>                    2,590,226
<NET-CHANGE-FROM-OPS>                        2,704,491
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                    (267,149)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      1,033,213
<NUMBER-OF-SHARES-REDEEMED>                  (646,909)
<SHARES-REINVESTED>                             25,638
<NET-CHANGE-IN-ASSETS>                       6,557,011
<ACCUMULATED-NII-PRIOR>                        267,028
<ACCUMULATED-GAINS-PRIOR>                  (1,271,376)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        (126,446)
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              (148,594)
<AVERAGE-NET-ASSETS>                        39,228,861
<PER-SHARE-NAV-BEGIN>                             9.82
<PER-SHARE-NII>                                   0.05
<PER-SHARE-GAIN-APPREC>                           0.62
<PER-SHARE-DIVIDEND>                            (0.07)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              10.42
<EXPENSE-RATIO>                                   0.29


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Variable Investment Series - Capital Growth Portfolio
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - CAPITAL GROWTH PORTFOLIO
<SERIES>
   <NUMBER> 6
   <NAME> CAPITAL GROWTH PORTFOLIO

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<INVESTMENTS-AT-COST>                      138,918,034
<INVESTMENTS-AT-VALUE>                     148,230,061
<RECEIVABLES>                                7,481,346
<ASSETS-OTHER>                                   4,402
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             155,715,809
<PAYABLE-FOR-SECURITIES>                  (13,944,302)
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    (187,157)
<TOTAL-LIABILITIES>                       (14,131,459)
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   106,819,831
<SHARES-COMMON-STOCK>                        7,397,697
<SHARES-COMMON-PRIOR>                        6,806,997
<ACCUMULATED-NII-CURRENT>                       11,244
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                     25,441,248
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     9,312,027
<NET-ASSETS>                               141,584,350
<DIVIDEND-INCOME>                              416,723
<INTEREST-INCOME>                               93,781
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               (498,836)
<NET-INVESTMENT-INCOME>                         11,668
<REALIZED-GAINS-CURRENT>                    29,165,138
<APPREC-INCREASE-CURRENT>                 (19,178,876)
<NET-CHANGE-FROM-OPS>                        9,997,930
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                  (17,791,828)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        557,574
<NUMBER-OF-SHARES-REDEEMED>                  (896,436)
<SHARES-REINVESTED>                            929,562
<NET-CHANGE-IN-ASSETS>                       2,981,240
<ACCUMULATED-NII-PRIOR>                          (424)
<ACCUMULATED-GAINS-PRIOR>                   14,067,938
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        (451,375)
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              (498,836)
<AVERAGE-NET-ASSETS>                       140,035,691
<PER-SHARE-NAV-BEGIN>                            20.36
<PER-SHARE-NII>                                   0.00
<PER-SHARE-GAIN-APPREC>                           1.53
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                       (2.75)
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              19.14
<EXPENSE-RATIO>                                   0.72


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Variable Investment Series - Dividend Growth
Portfolio
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - DIVIDEND GROWTH PORTFOLIO
<SERIES>
   <NUMBER> 5
   <NAME> DIVIDEND GROWTH PORTFOLIO

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<INVESTMENTS-AT-COST>                    2,039,712,685
<INVESTMENTS-AT-VALUE>                   2,292,981,708
<RECEIVABLES>                              357,469,764
<ASSETS-OTHER>                                  37,534
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                           2,650,489,006
<PAYABLE-FOR-SECURITIES>                 (212,478,578)
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                  (2,068,461)
<TOTAL-LIABILITIES>                      (214,547,039)
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                 1,911,604,061
<SHARES-COMMON-STOCK>                      117,266,537
<SHARES-COMMON-PRIOR>                      101,647,547
<ACCUMULATED-NII-CURRENT>                        1,215
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                    271,067,668
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   253,269,023
<NET-ASSETS>                             2,435,941,967
<DIVIDEND-INCOME>                           26,010,993
<INTEREST-INCOME>                              765,428
<OTHER-INCOME>                                       0
<EXPENSES-NET>                             (6,052,356)
<NET-INVESTMENT-INCOME>                     20,724,065
<REALIZED-GAINS-CURRENT>                   281,058,540
<APPREC-INCREASE-CURRENT>                 (88,237,327)
<NET-CHANGE-FROM-OPS>                      213,545,278
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                 (20,723,004)
<DISTRIBUTIONS-OF-GAINS>                 (329,147,530)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      7,061,859
<NUMBER-OF-SHARES-REDEEMED>                (8,256,321)
<SHARES-REINVESTED>                         16,813,452
<NET-CHANGE-IN-ASSETS>                     186,015,188
<ACCUMULATED-NII-PRIOR>                            154
<ACCUMULATED-GAINS-PRIOR>                  319,156,658
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                      (5,890,919)
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                            (6,052,356)
<AVERAGE-NET-ASSETS>                     2,334,328,495
<PER-SHARE-NAV-BEGIN>                            22.13
<PER-SHARE-NII>                                   0.21
<PER-SHARE-GAIN-APPREC>                           1.90
<PER-SHARE-DIVIDEND>                            (0.21)
<PER-SHARE-DISTRIBUTIONS>                       (3.26)
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              20.77
<EXPENSE-RATIO>                                   0.52


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Variable Investment Series - Equity Portfolio
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - EQUITY PORTFOLIO
<SERIES>
   <NUMBER> 8
   <NAME> EQUITY PORTFOLIO

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<INVESTMENTS-AT-COST>                    1,352,244,739
<INVESTMENTS-AT-VALUE>                   1,488,916,523
<RECEIVABLES>                               26,822,197
<ASSETS-OTHER>                                  21,238
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                           1,515,759,958
<PAYABLE-FOR-SECURITIES>                  (46,053,566)
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                  (1,034,795)
<TOTAL-LIABILITIES>                       (47,088,361)
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                 1,055,687,246
<SHARES-COMMON-STOCK>                       36,748,361
<SHARES-COMMON-PRIOR>                       29,505,782
<ACCUMULATED-NII-CURRENT>                    2,787,610
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                    273,524,957
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   136,671,784
<NET-ASSETS>                             1,468,671,597
<DIVIDEND-INCOME>                            3,880,086
<INTEREST-INCOME>                            3,334,225
<OTHER-INCOME>                                       0
<EXPENSES-NET>                             (3,326,417)
<NET-INVESTMENT-INCOME>                      3,887,894
<REALIZED-GAINS-CURRENT>                   287,670,319
<APPREC-INCREASE-CURRENT>                 (89,998,168)
<NET-CHANGE-FROM-OPS>                      201,560,045
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                  (1,094,802)
<DISTRIBUTIONS-OF-GAINS>                 (168,434,937)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      3,827,022
<NUMBER-OF-SHARES-REDEEMED>                (2,473,008)
<SHARES-REINVESTED>                          5,064,107
<NET-CHANGE-IN-ASSETS>                     330,258,874
<ACCUMULATED-NII-PRIOR>                        (5,165)
<ACCUMULATED-GAINS-PRIOR>                  160,637,236
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                      (3,235,472)
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                            (3,326,417)
<AVERAGE-NET-ASSETS>                     1,320,962,318
<PER-SHARE-NAV-BEGIN>                            38.58
<PER-SHARE-NII>                                   0.11
<PER-SHARE-GAIN-APPREC>                           6.49
<PER-SHARE-DIVIDEND>                            (0.03)
<PER-SHARE-DISTRIBUTIONS>                       (5.18)
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              39.97
<EXPENSE-RATIO>                                   0.51


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Variable Investment Series - European Growth
Portfolio
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - EUROPEAN GROWTH PORTFOLIO
<SERIES>
   <NUMBER> 7
   <NAME> EUROPEAN GROWTH PORTFOLIO

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<INVESTMENTS-AT-COST>                      390,895,231
<INVESTMENTS-AT-VALUE>                     486,828,580
<RECEIVABLES>                                5,466,815
<ASSETS-OTHER>                                 118,081
<OTHER-ITEMS-ASSETS>                           427,511
<TOTAL-ASSETS>                             492,840,987
<PAYABLE-FOR-SECURITIES>                   (2,425,416)
<SENIOR-LONG-TERM-DEBT>                      (722,342)
<OTHER-ITEMS-LIABILITIES>                            0
<TOTAL-LIABILITIES>                        (3,147,758)
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   348,442,164
<SHARES-COMMON-STOCK>                       19,602,324
<SHARES-COMMON-PRIOR>                       18,785,057
<ACCUMULATED-NII-CURRENT>                    3,577,679
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                     41,649,180
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                    96,024,206
<NET-ASSETS>                               489,693,229
<DIVIDEND-INCOME>                            5,997,200
<INTEREST-INCOME>                              288,713
<OTHER-INCOME>                                       0
<EXPENSES-NET>                             (2,648,720)
<NET-INVESTMENT-INCOME>                      3,637,193
<REALIZED-GAINS-CURRENT>                    45,898,482
<APPREC-INCREASE-CURRENT>                 (37,293,284)
<NET-CHANGE-FROM-OPS>                       12,242,391
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                  (3,193,618)
<DISTRIBUTIONS-OF-GAINS>                  (47,361,324)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      3,492,917
<NUMBER-OF-SHARES-REDEEMED>                (4,698,657)
<SHARES-REINVESTED>                          2,023,007
<NET-CHANGE-IN-ASSETS>                    (20,944,368)
<ACCUMULATED-NII-PRIOR>                      3,134,104
<ACCUMULATED-GAINS-PRIOR>                   43,112,022
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                      (2,378,043)
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                            (2,648,720)
<AVERAGE-NET-ASSETS>                       505,212,638
<PER-SHARE-NAV-BEGIN>                            27.18
<PER-SHARE-NII>                                   0.20
<PER-SHARE-GAIN-APPREC>                           0.47
<PER-SHARE-DIVIDEND>                            (0.18)
<PER-SHARE-DISTRIBUTIONS>                       (2.69)
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              24.98
<EXPENSE-RATIO>                                   1.06


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Variable Investment Series - Global Dividend Growth
Portfolio
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VAR. INVESTMENT SERIES - GLOBAL DIV. GROWTH PORTFOLIO
<SERIES>
   <NUMBER> 10
   <NAME> GLOBAL DIVIDEND GROWTH PORTFOLIO

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<INVESTMENTS-AT-COST>                      430,687,000
<INVESTMENTS-AT-VALUE>                     497,977,053
<RECEIVABLES>                                2,367,735
<ASSETS-OTHER>                                  29,783
<OTHER-ITEMS-ASSETS>                           401,445
<TOTAL-ASSETS>                             500,776,016
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    (581,094)
<TOTAL-LIABILITIES>                          (581,094)
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   423,791,318
<SHARES-COMMON-STOCK>                       35,697,820
<SHARES-COMMON-PRIOR>                       35,025,587
<ACCUMULATED-NII-CURRENT>                      500,018
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      8,624,501
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                    67,279,085
<NET-ASSETS>                               500,194,922
<DIVIDEND-INCOME>                            7,178,439
<INTEREST-INCOME>                              268,074
<OTHER-INCOME>                                       0
<EXPENSES-NET>                             (1,985,338)
<NET-INVESTMENT-INCOME>                      5,461,175
<REALIZED-GAINS-CURRENT>                    19,366,393
<APPREC-INCREASE-CURRENT>                   22,629,856
<NET-CHANGE-FROM-OPS>                       47,457,424
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                  (5,481,688)
<DISTRIBUTIONS-OF-GAINS>                  (35,181,150)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      1,450,463
<NUMBER-OF-SHARES-REDEEMED>                (3,682,783)
<SHARES-REINVESTED>                          2,904,553
<NET-CHANGE-IN-ASSETS>                      15,967,358
<ACCUMULATED-NII-PRIOR>                        520,531
<ACCUMULATED-GAINS-PRIOR>                   24,439,258
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                      (1,792,667)
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                            (1,985,338)
<AVERAGE-NET-ASSETS>                       482,006,346
<PER-SHARE-NAV-BEGIN>                            13.82
<PER-SHARE-NII>                                   0.16
<PER-SHARE-GAIN-APPREC>                           1.27
<PER-SHARE-DIVIDEND>                            (0.17)
<PER-SHARE-DISTRIBUTIONS>                       (1.07)
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              14.01
<EXPENSE-RATIO>                                   0.83


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Variable Investment Series - High Yield Portfolio
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - HIGH YIELD PORTFOLIO
<SERIES>
   <NUMBER> 3
   <NAME> HIGH YIELD PORTFOLIO

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<INVESTMENTS-AT-COST>                      417,958,705
<INVESTMENTS-AT-VALUE>                     334,102,795
<RECEIVABLES>                                9,614,081
<ASSETS-OTHER>                                  17,114
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             343,733,990
<PAYABLE-FOR-SECURITIES>                   (2,561,104)
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    (778,909)
<TOTAL-LIABILITIES>                        (3,340,013)
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   471,099,325
<SHARES-COMMON-STOCK>                       68,952,702
<SHARES-COMMON-PRIOR>                       71,785,647
<ACCUMULATED-NII-CURRENT>                       53,582
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                   (46,903,020)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                  (83,855,910)
<NET-ASSETS>                               340,393,977
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                           24,156,365
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               (928,504)
<NET-INVESTMENT-INCOME>                     23,227,861
<REALIZED-GAINS-CURRENT>                   (7,091,487)
<APPREC-INCREASE-CURRENT>                  (2,178,837)
<NET-CHANGE-FROM-OPS>                       13,957,537
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                 (23,326,035)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      5,566,064
<NUMBER-OF-SHARES-REDEEMED>               (13,103,401)
<SHARES-REINVESTED>                          4,704,392
<NET-CHANGE-IN-ASSETS>                    (23,684,927)
<ACCUMULATED-NII-PRIOR>                        151,756
<ACCUMULATED-GAINS-PRIOR>                 (39,811,533)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        (873,980)
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              (928,504)
<AVERAGE-NET-ASSETS>                       352,488,983
<PER-SHARE-NAV-BEGIN>                             5.07
<PER-SHARE-NII>                                   0.33
<PER-SHARE-GAIN-APPREC>                         (0.13)
<PER-SHARE-DIVIDEND>                            (0.33)
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               4.94
<EXPENSE-RATIO>                                   0.53


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Variable Investment Series - Income Builder Portfolio
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - INCOME BUILDER PORTFOLIO
<SERIES>
   <NUMBER> 13
   <NAME> INCOME BUILDER PORTFOLIO

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<INVESTMENTS-AT-COST>                       83,299,163
<INVESTMENTS-AT-VALUE>                      86,777,735
<RECEIVABLES>                                1,388,128
<ASSETS-OTHER>                                  82,815
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              88,248,678
<PAYABLE-FOR-SECURITIES>                     (185,661)
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                     (95,963)
<TOTAL-LIABILITIES>                          (281,624)
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    84,163,768
<SHARES-COMMON-STOCK>                        7,367,372
<SHARES-COMMON-PRIOR>                        7,657,710
<ACCUMULATED-NII-CURRENT>                            2
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                        324,712
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     3,478,572
<NET-ASSETS>                                87,967,054
<DIVIDEND-INCOME>                            1,377,191
<INTEREST-INCOME>                            1,113,473
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               (342,888)
<NET-INVESTMENT-INCOME>                      2,147,776
<REALIZED-GAINS-CURRENT>                     1,068,830
<APPREC-INCREASE-CURRENT>                    4,070,556
<NET-CHANGE-FROM-OPS>                        7,287,162
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                  (2,162,653)
<DISTRIBUTIONS-OF-GAINS>                   (1,674,662)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        670,241
<NUMBER-OF-SHARES-REDEEMED>                (1,288,473)
<SHARES-REINVESTED>                            327,894
<NET-CHANGE-IN-ASSETS>                         197,920
<ACCUMULATED-NII-PRIOR>                         14,879
<ACCUMULATED-GAINS-PRIOR>                      930,544
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        (317,940)
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              (342,888)
<AVERAGE-NET-ASSETS>                        85,486,669
<PER-SHARE-NAV-BEGIN>                            11.46
<PER-SHARE-NII>                                   0.30
<PER-SHARE-GAIN-APPREC>                           0.71
<PER-SHARE-DIVIDEND>                            (0.30)
<PER-SHARE-DISTRIBUTIONS>                       (0.23)
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              11.94
<EXPENSE-RATIO>                                   0.81


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Variable Investment Series - Money Market Portfolio
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - MONEY MARKET PORTFOLIO
<SERIES>
   <NUMBER> 1
   <NAME> MONEY MARKET PORTFOLIO

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<INVESTMENTS-AT-COST>                      423,715,313
<INVESTMENTS-AT-VALUE>                     423,715,313
<RECEIVABLES>                                1,093,308
<ASSETS-OTHER>                                  13,291
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             424,821,912
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                  (3,698,531)
<TOTAL-LIABILITIES>                        (3,698,531)
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   421,123,082
<SHARES-COMMON-STOCK>                      421,123,082
<SHARES-COMMON-PRIOR>                      442,034,462
<ACCUMULATED-NII-CURRENT>                          299
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                               421,123,381
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                           10,717,779
<OTHER-INCOME>                                       0
<EXPENSES-NET>                             (1,110,208)
<NET-INVESTMENT-INCOME>                      9,607,571
<REALIZED-GAINS-CURRENT>                         1,751
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                        9,609,322
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                  (9,607,294)
<DISTRIBUTIONS-OF-GAINS>                       (1,751)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                    283,412,766
<NUMBER-OF-SHARES-REDEEMED>              (313,933,191)
<SHARES-REINVESTED>                          9,609,045
<NET-CHANGE-IN-ASSETS>                    (20,911,380)
<ACCUMULATED-NII-PRIOR>                             22
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                      (1,073,806)
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                            (1,110,208)
<AVERAGE-NET-ASSETS>                       433,082,027
<PER-SHARE-NAV-BEGIN>                             1.00
<PER-SHARE-NII>                                  0.022
<PER-SHARE-GAIN-APPREC>                           0.00
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                      (0.022)
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               1.00
<EXPENSE-RATIO>                                   0.52


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Variable Investment Series - Pacific Growth Portfolio
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - PACIFIC GROWTH PORTFOLIO
<SERIES>
   <NUMBER> 11
   <NAME> PACIFIC GROWTH PORTFOLIO

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<INVESTMENTS-AT-COST>                       74,958,288
<INVESTMENTS-AT-VALUE>                      90,869,621
<RECEIVABLES>                                3,558,514
<ASSETS-OTHER>                                  39,503
<OTHER-ITEMS-ASSETS>                           801,575
<TOTAL-ASSETS>                              95,269,213
<PAYABLE-FOR-SECURITIES>                   (3,391,946)
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                     (98,068)
<TOTAL-LIABILITIES>                        (3,490,014)
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   130,960,175
<SHARES-COMMON-STOCK>                       13,770,258
<SHARES-COMMON-PRIOR>                       10,269,558
<ACCUMULATED-NII-CURRENT>                    (145,755)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                   (54,935,531)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                    15,900,310
<NET-ASSETS>                                91,779,199
<DIVIDEND-INCOME>                              522,066
<INTEREST-INCOME>                              108,964
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               (417,526)
<NET-INVESTMENT-INCOME>                        213,504
<REALIZED-GAINS-CURRENT>                     4,674,784
<APPREC-INCREASE-CURRENT>                   14,125,765
<NET-CHANGE-FROM-OPS>                       19,014,053
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                    (770,896)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                     21,650,469
<NUMBER-OF-SHARES-REDEEMED>               (18,265,519)
<SHARES-REINVESTED>                            115,750
<NET-CHANGE-IN-ASSETS>                      38,937,662
<ACCUMULATED-NII-PRIOR>                        411,637
<ACCUMULATED-GAINS-PRIOR>                 (59,610,315)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        (295,028)
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              (417,526)
<AVERAGE-NET-ASSETS>                        62,625,985
<PER-SHARE-NAV-BEGIN>                             5.15
<PER-SHARE-NII>                                   0.01
<PER-SHARE-GAIN-APPREC>                           1.57
<PER-SHARE-DIVIDEND>                            (0.06)
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               6.67
<EXPENSE-RATIO>                                   1.34


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Variable Investment Series - Quality Income Plus
Portfolio
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VAR. INVESTMENT SERIES - QUALITY INCOME PLUS PORTFOLIO
<SERIES>
   <NUMBER> 2
   <NAME> QUALITY INCOME PLUS PORTFOLIO

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<INVESTMENTS-AT-COST>                      504,149,971
<INVESTMENTS-AT-VALUE>                     498,540,146
<RECEIVABLES>                               16,410,645
<ASSETS-OTHER>                                   6,740
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             514,957,531
<PAYABLE-FOR-SECURITIES>                  (10,362,877)
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    (578,587)
<TOTAL-LIABILITIES>                       (10,941,464)
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   532,193,246
<SHARES-COMMON-STOCK>                       49,249,216
<SHARES-COMMON-PRIOR>                       49,794,001
<ACCUMULATED-NII-CURRENT>                          221
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                   (22,567,575)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   (5,609,825)
<NET-ASSETS>                               504,016,067
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                           17,751,066
<OTHER-INCOME>                                       0
<EXPENSES-NET>                             (1,364,617)
<NET-INVESTMENT-INCOME>                     16,386,449
<REALIZED-GAINS-CURRENT>                   (6,384,714)
<APPREC-INCREASE-CURRENT>                 (31,368,410)
<NET-CHANGE-FROM-OPS>                     (21,366,675)
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                 (16,385,928)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      3,552,922
<NUMBER-OF-SHARES-REDEEMED>                (5,645,231)
<SHARES-REINVESTED>                          1,547,524
<NET-CHANGE-IN-ASSETS>                    (43,566,714)
<ACCUMULATED-NII-PRIOR>                          (300)
<ACCUMULATED-GAINS-PRIOR>                 (16,182,861)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                      (1,302,800)
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                            (1,364,617)
<AVERAGE-NET-ASSETS>                       528,276,477
<PER-SHARE-NAV-BEGIN>                            11.00
<PER-SHARE-NII>                                   0.33
<PER-SHARE-GAIN-APPREC>                         (0.77)
<PER-SHARE-DIVIDEND>                            (0.33)
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              10.23
<EXPENSE-RATIO>                                   0.52


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Variable Investment Series - S&P 500 Index Portfolio
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - S&P 500 INDEX PORTFOLIO
<SERIES>
   <NUMBER> 14
   <NAME> S&P 500 INDEX PORTFOLIO

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<INVESTMENTS-AT-COST>                      105,055,734
<INVESTMENTS-AT-VALUE>                     117,781,969
<RECEIVABLES>                                1,651,370
<ASSETS-OTHER>                                   9,396
<OTHER-ITEMS-ASSETS>                            83,759
<TOTAL-ASSETS>                             119,526,494
<PAYABLE-FOR-SECURITIES>                     (183,961)
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    (114,501)
<TOTAL-LIABILITIES>                          (298,462)
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   105,413,472
<SHARES-COMMON-STOCK>                        9,535,450
<SHARES-COMMON-PRIOR>                        4,343,636
<ACCUMULATED-NII-CURRENT>                      480,678
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                        417,674
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                    12,916,208
<NET-ASSETS>                               119,228,032
<DIVIDEND-INCOME>                              539,254
<INTEREST-INCOME>                              144,291
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               (202,862)
<NET-INVESTMENT-INCOME>                        480,683
<REALIZED-GAINS-CURRENT>                       514,806
<APPREC-INCREASE-CURRENT>                    8,742,296
<NET-CHANGE-FROM-OPS>                        9,737,785
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                    (244,995)
<DISTRIBUTIONS-OF-GAINS>                     (283,184)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      6,159,937
<NUMBER-OF-SHARES-REDEEMED>                (1,010,377)
<SHARES-REINVESTED>                             42,254
<NET-CHANGE-IN-ASSETS>                      70,496,064
<ACCUMULATED-NII-PRIOR>                        244,990
<ACCUMULATED-GAINS-PRIOR>                      186,052
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        (169,055)
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              (206,049)
<AVERAGE-NET-ASSETS>                        85,227,749
<PER-SHARE-NAV-BEGIN>                            11.22
<PER-SHARE-NII>                                   0.02
<PER-SHARE-GAIN-APPREC>                           1.32
<PER-SHARE-DIVIDEND>                            (0.03)
<PER-SHARE-DISTRIBUTIONS>                       (0.03)
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              12.50
<EXPENSE-RATIO>                                   0.48


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Variable Investment Series - Short-Term Bond
Portfolio
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - SHORT-TERM BOND PORTFOLIO
<SERIES>
   <NUMBER> 12
   <NAME> SHORT-TERM BOND PORTFOLIO

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<INVESTMENTS-AT-COST>                          874,958
<INVESTMENTS-AT-VALUE>                         874,548
<RECEIVABLES>                                   13,648
<ASSETS-OTHER>                                   5,519
<OTHER-ITEMS-ASSETS>                            48,534
<TOTAL-ASSETS>                                 942,249
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      (5,556)
<TOTAL-LIABILITIES>                            (5,556)
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       938,382
<SHARES-COMMON-STOCK>                           94,292
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                        (1,279)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         (410)
<NET-ASSETS>                                   936,693
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                3,279
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                       0
<NET-INVESTMENT-INCOME>                          3,279
<REALIZED-GAINS-CURRENT>                       (1,279)
<APPREC-INCREASE-CURRENT>                        (410)
<NET-CHANGE-FROM-OPS>                            1,590
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      (3,279)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        141,872
<NUMBER-OF-SHARES-REDEEMED>                   (47,910)
<SHARES-REINVESTED>                                330
<NET-CHANGE-IN-ASSETS>                         936,683
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                            (320)
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                (5,839)
<AVERAGE-NET-ASSETS>                           447,109
<PER-SHARE-NAV-BEGIN>                            10.00
<PER-SHARE-NII>                                   0.04
<PER-SHARE-GAIN-APPREC>                         (0.07)
<PER-SHARE-DIVIDEND>                            (0.04)
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               9.93
<EXPENSE-RATIO>                                   0.00


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Variable Investment Series - Utilities Portfolio
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - UTILITIES PORTFOLIO
<SERIES>
   <NUMBER> 4
   <NAME> UTILITIES PORTFOLIO

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<INVESTMENTS-AT-COST>                      345,217,978
<INVESTMENTS-AT-VALUE>                     577,613,097
<RECEIVABLES>                                2,425,143
<ASSETS-OTHER>                               1,002,977
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             581,041,217
<PAYABLE-FOR-SECURITIES>                     (215,000)
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    (702,477)
<TOTAL-LIABILITIES>                          (917,477)
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   329,616,906
<SHARES-COMMON-STOCK>                       26,492,601
<SHARES-COMMON-PRIOR>                       26,391,176
<ACCUMULATED-NII-CURRENT>                           40
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                     18,111,675
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   232,395,119
<NET-ASSETS>                               580,123,740
<DIVIDEND-INCOME>                            6,986,622
<INTEREST-INCOME>                            2,099,526
<OTHER-INCOME>                                       0
<EXPENSES-NET>                             (1,838,313)
<NET-INVESTMENT-INCOME>                      7,247,835
<REALIZED-GAINS-CURRENT>                    18,151,538
<APPREC-INCREASE-CURRENT>                   10,175,326
<NET-CHANGE-FROM-OPS>                       35,574,699
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                  (7,247,820)
<DISTRIBUTIONS-OF-GAINS>                  (11,183,442)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      2,089,376
<NUMBER-OF-SHARES-REDEEMED>                (2,839,324)
<SHARES-REINVESTED>                            851,373
<NET-CHANGE-IN-ASSETS>                       2,177,470
<ACCUMULATED-NII-PRIOR>                             25
<ACCUMULATED-GAINS-PRIOR>                   11,143,579
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                      (1,790,683)
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                            (1,838,313)
<AVERAGE-NET-ASSETS>                       565,644,868
<PER-SHARE-NAV-BEGIN>                            21.25
<PER-SHARE-NII>                                   0.28
<PER-SHARE-GAIN-APPREC>                           1.08
<PER-SHARE-DIVIDEND>                            (0.28)
<PER-SHARE-DISTRIBUTIONS>                       (0.43)
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              21.90
<EXPENSE-RATIO>                                   0.68


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Variable Investment Series - Strategist Portfolio
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - STRATEGIST PORTFOLIO
<SERIES>
   <NUMBER> 9
   <NAME> STRATEGIST PORTFOLIO

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<INVESTMENTS-AT-COST>                      521,869,070
<INVESTMENTS-AT-VALUE>                     690,788,559
<RECEIVABLES>                                3,660,003
<ASSETS-OTHER>                                  13,370
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             694,461,932
<PAYABLE-FOR-SECURITIES>                     (999,270)
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    (531,894)
<TOTAL-LIABILITIES>                        (1,531,164)
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   492,998,866
<SHARES-COMMON-STOCK>                       38,799,731
<SHARES-COMMON-PRIOR>                       38,098,404
<ACCUMULATED-NII-CURRENT>                      (6,635)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                     31,019,048
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   168,919,489
<NET-ASSETS>                               692,930,768
<DIVIDEND-INCOME>                            1,827,750
<INTEREST-INCOME>                            7,253,842
<OTHER-INCOME>                                       0
<EXPENSES-NET>                             (1,702,734)
<NET-INVESTMENT-INCOME>                      7,378,858
<REALIZED-GAINS-CURRENT>                    38,060,336
<APPREC-INCREASE-CURRENT>                    8,570,418
<NET-CHANGE-FROM-OPS>                       54,009,612
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                  (7,385,951)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      3,593,970
<NUMBER-OF-SHARES-REDEEMED>                (3,312,840)
<SHARES-REINVESTED>                            420,197
<NET-CHANGE-IN-ASSETS>                      58,996,488
<ACCUMULATED-NII-PRIOR>                            458
<ACCUMULATED-GAINS-PRIOR>                  (7,041,288)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                      (1,651,811)
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                            (1,702,734)
<AVERAGE-NET-ASSETS>                       666,200,034
<PER-SHARE-NAV-BEGIN>                            16.64
<PER-SHARE-NII>                                   0.19
<PER-SHARE-GAIN-APPREC>                           1.22
<PER-SHARE-DIVIDEND>                            (0.19)
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              17.86
<EXPENSE-RATIO>                                   0.52


</TABLE>


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