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<PAGE> PAGE 21
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<PAGE> PAGE 22
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<PAGE> PAGE 23
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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 29
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<PAGE> PAGE 30
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<PAGE> PAGE 31
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<PAGE> PAGE 32
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<PAGE> PAGE 33
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<PAGE> PAGE 34
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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 40
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<PAGE> PAGE 41
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<PAGE> PAGE 42
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008 A000901 MORGAN STANLEY DEAN WITTER ADVISORS INC.
008 B000901 A
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015 A000901 THE BANK OF NEW YORK
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<PAGE> PAGE 43
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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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008 A001001 MORGAN STANLEY DEAN WITTER ADVISORS INC.
008 B001001 A
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008 D031001 10048
008 A001002 DELETE
015 A001001 THE CHASE MANHATTAN BANK
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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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008 A001101 MORGAN STANLEY DEAN WITTER ADVISORS INC.
008 B001101 A
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008 D021101 NY
008 D031101 10048
008 A001102 MSDW INVESTMENT MANAGEMENT INC.
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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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<PAGE> PAGE 56
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008 A001201 MORGAN STANLEY DEAN WITTER ADVISORS INC.
008 B001201 A
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008 D011201 NEW YORK
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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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<PAGE> PAGE 58
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<PAGE> PAGE 59
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<PAGE> PAGE 60
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008 A001301 MORGAN STANLEY DEAN WITTER ADVISORS INC.
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
015 C011301 NEW YORK
015 C021301 NY
015 C031301 10268
015 E011301 X
024 001300 Y
025 A001301 MERRILL LYNCH & CO. INC.6.24
025 B001301 13-5674085
025 C001301 E
025 D001301 379
025 A001302 MERRILL LYNCH & CO. INC.7.25
025 B001302 13-5674085
025 C001302 E
025 D001302 745
025 A001303 BANK OF NEW YORK (THE)
<PAGE> PAGE 61
025 B001303 13-5160382
025 C001303 D
025 D001303 2302
025 D001304 0
025 D001305 0
025 D001306 0
025 D001307 0
025 D001308 0
028 A011300 3696
028 A021300 0
028 A031300 0
028 A041300 1649
028 B011300 2681
028 B021300 0
028 B031300 0
028 B041300 3019
028 C011300 1574
028 C021300 0
028 C031300 0
028 C041300 2342
028 D011300 1528
028 D021300 1108
028 D031300 0
028 D041300 2478
028 E011300 1502
028 E021300 0
028 E031300 0
028 E041300 1277
028 F011300 1847
028 F021300 1142
028 F031300 0
028 F041300 1443
028 G011300 12828
028 G021300 2250
028 G031300 0
028 G041300 12208
028 H001300 0
045 001300 Y
046 001300 N
047 001300 Y
048 001300 0.750
048 A011300 0
048 A021300 0.000
048 B011300 0
048 B021300 0.000
048 C011300 0
048 C021300 0.000
048 D011300 0
048 D021300 0.000
048 E011300 0
048 E021300 0.000
<PAGE> PAGE 62
048 F011300 0
048 F021300 0.000
048 G011300 0
048 G021300 0.000
048 H011300 0
048 H021300 0.000
048 I011300 0
048 I021300 0.000
048 J011300 0
048 J021300 0.000
048 K011300 0
048 K021300 0.000
049 001300 N
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
062 C001300 0.0
062 D001300 0.0
062 E001300 0.0
062 F001300 0.0
062 G001300 0.0
062 H001300 0.0
062 I001300 0.0
062 J001300 0.0
062 K001300 0.0
062 L001300 0.0
062 M001300 0.0
062 N001300 0.0
062 O001300 0.0
062 P001300 0.0
062 Q001300 0.0
062 R001300 0.0
063 A001300 0
063 B001300 0.0
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
<PAGE> PAGE 63
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
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
071 A001300 72553
071 B001300 38987
071 C001300 72679
071 D001300 54
072 A001300 12
072 B001300 2405
072 C001300 2277
072 D001300 0
072 E001300 0
072 F001300 595
072 G001300 0
072 H001300 0
072 I001300 1
072 J001300 24
<PAGE> PAGE 64
072 K001300 0
072 L001300 2
072 M001300 0
072 N001300 0
072 O001300 0
072 P001300 0
072 Q001300 0
072 R001300 17
072 S001300 1
072 T001300 0
072 U001300 0
072 V001300 0
072 W001300 4
072 X001300 644
072 Y001300 0
072 Z001300 4038
072AA001300 3114
072BB001300 2178
072CC011300 0
072CC021300 3663
072DD011300 4034
072DD021300 0
072EE001300 768
073 A011300 0.5649
073 A021300 0.0000
073 B001300 0.1058
073 C001300 0.0000
074 A001300 0
074 B001300 2302
074 C001300 1499
074 D001300 24195
074 E001300 18479
074 F001300 40541
074 G001300 0
074 H001300 0
074 I001300 0
074 J001300 159
074 K001300 140
074 L001300 700
074 M001300 2
074 N001300 88017
074 O001300 0
074 P001300 186
074 Q001300 0
074 R011300 0
074 R021300 0
074 R031300 0
074 R041300 62
074 S001300 0
074 T001300 87769
074 U011300 7658
<PAGE> PAGE 65
074 U021300 0
074 V011300 11.46
074 V021300 0.00
074 W001300 0.0000
074 X001300 3
074 Y001300 2058
075 A001300 0
075 B001300 79381
076 001300 0.00
008 A001401 MORGAN STANLEY DEAN WITTER ADVISORS INC.
008 B001401 A
008 C001401 801-42061
008 D011401 NEW YORK
008 D021401 NY
008 D031401 10048
015 A001401 THE BANK OF NEW YORK
015 B001401 C
015 C011401 NEW YORK
015 C021401 NY
015 C031401 10268
015 E011401 X
024 001400 Y
025 A001401 BEAR STEANS COMPANIES, INC.
025 B001401 13-3299429
025 C001401 E
025 D001401 19
025 A001402 LEHMAN BROTHERS HOLDINGS, INC.
025 B001402 13-2518466
025 C001402 E
025 D001402 23
025 A001403 MERRILL LYNCH, PIERCE, FENNER & SMITH
025 B001403 13-5674085
025 C001403 E
025 D001403 106
025 A001404 MORGAN STANEY DEAN WITTER & CO.
025 B001404 13-2655998
025 C001404 E
025 D001404 183
025 A001405 SCHWAB (CHARLES) CORP.
025 B001405 94-1737782
025 C001405 E
025 D001405 100
025 D001406 0
025 D001407 0
025 D001408 0
028 A011400 7669
028 A021400 0
028 A031400 0
028 A041400 483
028 B011400 6928
028 B021400 0
<PAGE> PAGE 66
028 B031400 0
028 B041400 361
028 C011400 4198
028 C021400 0
028 C031400 0
028 C041400 544
028 D011400 7052
028 D021400 0
028 D031400 0
028 D041400 2442
028 E011400 7571
028 E021400 0
028 E031400 0
028 E041400 551
028 F011400 9260
028 F021400 0
028 F031400 0
028 F041400 1201
028 G011400 42678
028 G021400 0
028 G031400 0
028 G041400 5582
028 H001400 0
045 001400 Y
046 001400 N
047 001400 Y
048 001400 0.400
048 A011400 0
048 A021400 0.000
048 B011400 0
048 B021400 0.000
048 C011400 0
048 C021400 0.000
048 D011400 0
048 D021400 0.000
048 E011400 0
048 E021400 0.000
048 F011400 0
048 F021400 0.000
048 G011400 0
048 G021400 0.000
048 H011400 0
048 H021400 0.000
048 I011400 0
048 I021400 0.000
048 J011400 0
048 J021400 0.000
048 K011400 0
048 K021400 0.000
049 001400 N
050 001400 N
<PAGE> PAGE 67
051 001400 N
052 001400 N
053 A001400 N
055 A001400 Y
055 B001400 Y
056 001400 Y
057 001400 N
062 A001400 N
062 B001400 0.0
062 C001400 0.0
062 D001400 0.0
062 E001400 0.0
062 F001400 0.0
062 G001400 0.0
062 H001400 0.0
062 I001400 0.0
062 J001400 0.0
062 K001400 0.0
062 L001400 0.0
062 M001400 0.0
062 N001400 0.0
062 O001400 0.0
062 P001400 0.0
062 Q001400 0.0
062 R001400 0.0
063 A001400 0
063 B001400 0.0
066 A001400 Y
066 B001400 N
066 C001400 N
066 D001400 N
066 E001400 N
066 F001400 N
066 G001400 Y
067 001400 N
068 A001400 N
068 B001400 N
069 001400 Y
070 A011400 Y
070 A021400 Y
070 B011400 N
070 B021400 N
070 C011400 N
070 C021400 N
070 D011400 N
070 D021400 N
070 E011400 N
070 E021400 N
070 F011400 Y
070 F021400 Y
070 G011400 N
<PAGE> PAGE 68
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
070 O011400 Y
070 O021400 Y
070 P011400 Y
070 P021400 Y
070 Q011400 N
070 Q021400 N
070 R011400 N
070 R021400 N
071 A001400 40840
071 B001400 374
071 C001400 20759
071 D001400 2
072 A001400 12
072 B001400 61
072 C001400 184
072 D001400 0
072 E001400 0
072 F001400 53
072 G001400 0
072 H001400 0
072 I001400 0
072 J001400 3
072 K001400 0
072 L001400 6
072 M001400 0
072 N001400 0
072 O001400 0
072 P001400 0
072 Q001400 0
072 R001400 14
072 S001400 0
072 T001400 0
072 U001400 0
072 V001400 0
072 W001400 2
072 X001400 78
<PAGE> PAGE 69
072 Y001400 78
072 Z001400 245
072AA001400 186
072BB001400 0
072CC011400 4174
072CC021400 0
072DD011400 0
072DD021400 0
072EE001400 0
073 A011400 0.0000
073 A021400 0.0000
073 B001400 0.0000
073 C001400 0.0000
074 A001400 96
074 B001400 0
074 C001400 4198
074 D001400 0
074 E001400 0
074 F001400 44546
074 G001400 0
074 H001400 0
074 I001400 0
074 J001400 247
074 K001400 12
074 L001400 176
074 M001400 13
074 N001400 49288
074 O001400 503
074 P001400 0
074 Q001400 0
074 R011400 0
074 R021400 0
074 R031400 0
074 R041400 53
074 S001400 0
074 T001400 48732
074 U011400 4343636
074 U021400 0
074 V011400 11.22
074 V021400 0.00
074 W001400 0.0000
074 X001400 3
074 Y001400 3902
075 A001400 0
075 B001400 21208
076 001400 0.00
008 A001501 MORGAN STANLEY DEAN WITTER ADVISORS INC.
008 B001501 A
008 C001501 801-42061
008 D011501 NEW YORK
008 D021501 NY
<PAGE> PAGE 70
008 D031501 10048
015 A001501 THE BANK OF NEW YORK
015 B001501 C
015 C011501 NEW YORK
015 C021501 NY
015 C031501 10268
015 E011501 X
024 001500 N
025 D001501 0
025 D001502 0
025 D001503 0
025 D001504 0
025 D001505 0
025 D001506 0
025 D001507 0
025 D001508 0
028 A011500 10119
028 A021500 0
028 A031500 0
028 A041500 5404
028 B011500 6642
028 B021500 0
028 B031500 0
028 B041500 626
028 C011500 2192
028 C021500 0
028 C031500 0
028 C041500 925
028 D011500 2654
028 D021500 0
028 D031500 0
028 D041500 978
028 E011500 2704
028 E021500 0
028 E031500 0
028 E041500 407
028 F011500 1981
028 F021500 0
028 F031500 0
028 F041500 675
028 G011500 26292
028 G021500 0
028 G031500 0
028 G041500 9015
028 H001500 0
045 001500 Y
046 001500 N
047 001500 Y
048 001500 0.650
048 A011500 0
048 A021500 0.000
<PAGE> PAGE 71
048 B011500 0
048 B021500 0.000
048 C011500 0
048 C021500 0.000
048 D011500 0
048 D021500 0.000
048 E011500 0
048 E021500 0.000
048 F011500 0
048 F021500 0.000
048 G011500 0
048 G021500 0.000
048 H011500 0
048 H021500 0.000
048 I011500 0
048 I021500 0.000
048 J011500 0
048 J021500 0.000
048 K011500 0
048 K021500 0.000
049 001500 N
050 001500 N
051 001500 N
052 001500 N
053 A001500 N
055 A001500 N
055 B001500 N
056 001500 Y
057 001500 N
062 A001500 N
062 B001500 0.0
062 C001500 0.0
062 D001500 0.0
062 E001500 0.0
062 F001500 0.0
062 G001500 0.0
062 H001500 0.0
062 I001500 0.0
062 J001500 0.0
062 K001500 0.0
062 L001500 0.0
062 M001500 0.0
062 N001500 0.0
062 O001500 0.0
062 P001500 0.0
062 Q001500 0.0
062 R001500 0.0
063 A001500 0
063 B001500 0.0
066 A001500 Y
066 B001500 N
<PAGE> PAGE 72
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
070 A011500 Y
070 A021500 Y
070 B011500 Y
070 B021500 N
070 C011500 Y
070 C021500 N
070 D011500 Y
070 D021500 N
070 E011500 Y
070 E021500 N
070 F011500 Y
070 F021500 N
070 G011500 Y
070 G021500 N
070 H011500 Y
070 H021500 N
070 I011500 N
070 I021500 N
070 J011500 Y
070 J021500 N
070 K011500 N
070 K021500 N
070 L011500 Y
070 L021500 Y
070 M011500 Y
070 M021500 Y
070 N011500 Y
070 N021500 N
070 O011500 Y
070 O021500 N
070 P011500 Y
070 P021500 N
070 Q011500 N
070 Q021500 N
070 R011500 N
070 R021500 N
071 A001500 40633
071 B001500 6949
071 C001500 22202
071 D001500 31
072 A001500 12
072 B001500 113
<PAGE> PAGE 73
072 C001500 153
072 D001500 0
072 E001500 0
072 F001500 100
072 G001500 0
072 H001500 0
072 I001500 0
072 J001500 19
072 K001500 0
072 L001500 4
072 M001500 0
072 N001500 0
072 O001500 0
072 P001500 0
072 Q001500 0
072 R001500 15
072 S001500 1
072 T001500 0
072 U001500 0
072 V001500 0
072 W001500 1
072 X001500 140
072 Y001500 140
072 Z001500 266
072AA001500 1271
072BB001500 1996
072CC011500 0
072CC021500 0
072DD011500 0
072DD021500 0
072EE001500 0
073 A011500 0.0000
073 A021500 0.0000
073 B001500 0.0000
073 C001500 0.0000
074 A001500 61
074 B001500 0
074 C001500 2049
074 D001500 0
074 E001500 0
074 F001500 34409
074 G001500 0
074 H001500 0
074 I001500 0
074 J001500 0
074 K001500 24
074 L001500 27
074 M001500 0
074 N001500 36570
074 O001500 0
074 P001500 0
<PAGE> PAGE 74
074 Q001500 0
074 R011500 0
074 R021500 0
074 R031500 0
074 R041500 31
074 S001500 0
074 T001500 36539
074 U011500 3722740
074 U021500 0
074 V011500 9.81
074 V021500 0.00
074 W001500 0.0000
074 X001500 3
074 Y001500 0
075 A001500 0
075 B001500 24573
076 001500 0.00
071 A003200 40840
071 B003200 374
071 C003200 20759
071 D003200 2
072 A003200 12
072 B003200 61
072 C003200 184
072 D003200 0
072 E003200 0
072 F003200 53
072 G003200 0
072 H003200 0
SIGNATURE BARRY FINK
TITLE VICE PRESIDENT
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MORGAN STANLEY DEAN WITTER VARIABLE INVESTMENT SERIES - MONEY MARKET
ANNUAL NSAR
DECEMBER 31, 1998
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - MONEY MARKET
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 442,351,870
<INVESTMENTS-AT-VALUE> 442,351,870
<RECEIVABLES> 820,517
<ASSETS-OTHER> 2,092
<OTHER-ITEMS-ASSETS> 13,212
<TOTAL-ASSETS> 443,187,691
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,153,207
<TOTAL-LIABILITIES> 1,153,207
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 442,034,462
<SHARES-COMMON-STOCK> 442,034,462
<SHARES-COMMON-PRIOR> 335,578,084
<ACCUMULATED-NII-CURRENT> 22
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 442,034,484
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 21,440,157
<OTHER-INCOME> 0
<EXPENSES-NET> 2,003,682
<NET-INVESTMENT-INCOME> 19,436,475
<REALIZED-GAINS-CURRENT> 1,854
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 19,438,329
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (19,436,518)
<DISTRIBUTIONS-OF-GAINS> (1,854)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 465,453,549
<NUMBER-OF-SHARES-REDEEMED> (378,435,543)
<SHARES-REINVESTED> 19,438,372
<NET-CHANGE-IN-ASSETS> 106,456,335
<ACCUMULATED-NII-PRIOR> 65
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1,927,552
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,003,682
<AVERAGE-NET-ASSETS> 385,510,329
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.051
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> (0.051)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.52
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MORGAN STANLEY DEAN WITTER VARIABLE INVESTMENT SERIES - QUALITY INCOME PLUS
ANNUAL NSAR
DECEMBER 31, 1998
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - QUALITY INCOME PLUS
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 514,350,009
<INVESTMENTS-AT-VALUE> 540,108,594
<RECEIVABLES> 7,879,222
<ASSETS-OTHER> 2,846
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 547,990,662
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 407,881
<TOTAL-LIABILITIES> 407,881
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 538,007,357
<SHARES-COMMON-STOCK> 49,794,001
<SHARES-COMMON-PRIOR> 44,123,343
<ACCUMULATED-NII-CURRENT> (300)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (16,182,861)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 25,758,585
<NET-ASSETS> 547,582,781
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 34,017,757
<OTHER-INCOME> 0
<EXPENSES-NET> 2,632,654
<NET-INVESTMENT-INCOME> 31,385,103
<REALIZED-GAINS-CURRENT> 7,060,684
<APPREC-INCREASE-CURRENT> 3,370,100
<NET-CHANGE-FROM-OPS> 41,815,887
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (31,385,551)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 13,356,857
<NUMBER-OF-SHARES-REDEEMED> (10,567,612)
<SHARES-REINVESTED> 2,881,413
<NET-CHANGE-IN-ASSETS> 72,593,273
<ACCUMULATED-NII-PRIOR> 148
<ACCUMULATED-GAINS-PRIOR> (23,243,545)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2,514,720
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,632,654
<AVERAGE-NET-ASSETS> 504,165,173
<PER-SHARE-NAV-BEGIN> 10.77
<PER-SHARE-NII> 0.68
<PER-SHARE-GAIN-APPREC> 0.23
<PER-SHARE-DIVIDEND> (0.68)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.00
<EXPENSE-RATIO> 0.52
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MORGAN STANLEY DEAN WITTER VARIABLE INVESTMENT SERIES - HIGH YIELD
ANNUAL NSAR
DECEMBER 31,1998
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - HIGH YIELD
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 438,365,763
<INVESTMENTS-AT-VALUE> 356,688,690
<RECEIVABLES> 7,955,732
<ASSETS-OTHER> 3,892
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 364,648,314
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 569,410
<TOTAL-LIABILITIES> 569,410
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 485,415,754
<SHARES-COMMON-STOCK> 71,785,647
<SHARES-COMMON-PRIOR> 60,135,547
<ACCUMULATED-NII-CURRENT> 151,756
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (39,811,533)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (81,677,073)
<NET-ASSETS> 364,078,904
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 49,800,195
<OTHER-INCOME> 0
<EXPENSES-NET> 2,053,439
<NET-INVESTMENT-INCOME> 47,746,756
<REALIZED-GAINS-CURRENT> (10,756,455)
<APPREC-INCREASE-CURRENT> (62,350,933)
<NET-CHANGE-FROM-OPS> (25,360,632)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (47,889,896)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 26,123,968
<NUMBER-OF-SHARES-REDEEMED> (22,927,167)
<SHARES-REINVESTED> 8,453,299
<NET-CHANGE-IN-ASSETS> (3,982,367)
<ACCUMULATED-NII-PRIOR> 294,896
<ACCUMULATED-GAINS-PRIOR> (63,345,466)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1,946,259
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,053,439
<AVERAGE-NET-ASSETS> 389,251,837
<PER-SHARE-NAV-BEGIN> 6.12
<PER-SHARE-NII> 0.71
<PER-SHARE-GAIN-APPREC> (1.05)
<PER-SHARE-DIVIDEND> (0.71)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 5.07
<EXPENSE-RATIO> 0.53
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MORGAN STANLEY DEAN WITTER VARIABLE INVESTMENT SERIES -UTILITIES
ANNUAL NSAR
DECEMBER 31, 1998
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - UTILITIES
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 336,459,982
<INVESTMENTS-AT-VALUE> 558,679,775
<RECEIVABLES> 2,657,356
<ASSETS-OTHER> 443
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 561,337,574
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 534,741
<TOTAL-LIABILITIES> 534,741
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 327,439,436
<SHARES-COMMON-STOCK> 26,391,176
<SHARES-COMMON-PRIOR> 24,650,021
<ACCUMULATED-NII-CURRENT> 25
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 11,143,579
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 222,219,793
<NET-ASSETS> 560,802,833
<DIVIDEND-INCOME> 13,552,605
<INTEREST-INCOME> 3,768,540
<OTHER-INCOME> 0
<EXPENSES-NET> 3,256,528
<NET-INVESTMENT-INCOME> 14,064,617
<REALIZED-GAINS-CURRENT> 11,183,431
<APPREC-INCREASE-CURRENT> 81,869,637
<NET-CHANGE-FROM-OPS> 107,117,685
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (14,064,645)
<DISTRIBUTIONS-OF-GAINS> (24,274,238)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 5,490,004
<NUMBER-OF-SHARES-REDEEMED> (5,716,328)
<SHARES-REINVESTED> 1,967,479
<NET-CHANGE-IN-ASSETS> 102,668,577
<ACCUMULATED-NII-PRIOR> 53
<ACCUMULATED-GAINS-PRIOR> 24,234,386
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3,160,139
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 3,256,528
<AVERAGE-NET-ASSETS> 487,109,335
<PER-SHARE-NAV-BEGIN> 18.59
<PER-SHARE-NII> 0.57
<PER-SHARE-GAIN-APPREC> 3.68
<PER-SHARE-DIVIDEND> (0.57)
<PER-SHARE-DISTRIBUTIONS> (1.02)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 21.25
<EXPENSE-RATIO> 0.67
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MORGAN STANLEY DEAN WITTER VARIABLE INVESTMENT SERIES - INCOME BUILDER
ANNUAL NSAR
DECEMBER 31, 1998
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - INCOME BUILDER
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 87,607,625
<INVESTMENTS-AT-VALUE> 87,015,641
<RECEIVABLES> 998,901
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 2,233
<TOTAL-ASSETS> 88,016,775
<PAYABLE-FOR-SECURITIES> 130,504
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 117,137
<TOTAL-LIABILITIES> 247,641
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 87,415,695
<SHARES-COMMON-STOCK> 7,657,710
<SHARES-COMMON-PRIOR> 4,711,055
<ACCUMULATED-NII-CURRENT> 14,879
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 930,544
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (591,984)
<NET-ASSETS> 87,769,134
<DIVIDEND-INCOME> 2,265,784
<INTEREST-INCOME> 2,415,707
<OTHER-INCOME> 0
<EXPENSES-NET> 643,830
<NET-INVESTMENT-INCOME> 4,037,661
<REALIZED-GAINS-CURRENT> 936,441
<APPREC-INCREASE-CURRENT> (3,662,539)
<NET-CHANGE-FROM-OPS> 1,311,563
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (4,033,908)
<DISTRIBUTIONS-OF-GAINS> (768,186)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 4,241,399
<NUMBER-OF-SHARES-REDEEMED> (1,710,560)
<SHARES-REINVESTED> 415,816
<NET-CHANGE-IN-ASSETS> 32,346,301
<ACCUMULATED-NII-PRIOR> 41
<ACCUMULATED-GAINS-PRIOR> 773,374
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 595,359
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 643,830
<AVERAGE-NET-ASSETS> 79,381,241
<PER-SHARE-NAV-BEGIN> 11.76
<PER-SHARE-NII> 0.56
<PER-SHARE-GAIN-APPREC> (0.19)
<PER-SHARE-DIVIDEND> (0.56)
<PER-SHARE-DISTRIBUTIONS> (0.11)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.46
<EXPENSE-RATIO> 0.81
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MORGAN STANLEY DEAN WITTER VARIABLE INVESTMENT SERIES - DIVIDEND GROWTH
ANNUAL NSAR
DECEMBER 31, 1998
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - DIVIDEND GROWTH
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 1,911,693,284
<INVESTMENTS-AT-VALUE> 2,253,199,634
<RECEIVABLES> 5,305,026
<ASSETS-OTHER> 11,645
<OTHER-ITEMS-ASSETS> 26,860
<TOTAL-ASSETS> 2,258,543,165
<PAYABLE-FOR-SECURITIES> 6,609,369
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2,007,017
<TOTAL-LIABILITIES> 8,616,386
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1,589,263,617
<SHARES-COMMON-STOCK> 101,647,547
<SHARES-COMMON-PRIOR> 88,256,107
<ACCUMULATED-NII-CURRENT> 154
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 319,156,658
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 341,506,350
<NET-ASSETS> 2,249,926,779
<DIVIDEND-INCOME> 47,422,494
<INTEREST-INCOME> 2,526,630
<OTHER-INCOME> 0
<EXPENSES-NET> 11,099,589
<NET-INVESTMENT-INCOME> 38,849,535
<REALIZED-GAINS-CURRENT> 322,115,886
<APPREC-INCREASE-CURRENT> (89,389,463)
<NET-CHANGE-FROM-OPS> 271,575,958
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (38,849,522)
<DISTRIBUTIONS-OF-GAINS> (187,973,609)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 21,516,674
<NUMBER-OF-SHARES-REDEEMED> (18,647,038)
<SHARES-REINVESTED> 10,521,804
<NET-CHANGE-IN-ASSETS> 344,021,021
<ACCUMULATED-NII-PRIOR> 141
<ACCUMULATED-GAINS-PRIOR> 185,014,381
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 10,828,424
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 11,099,589
<AVERAGE-NET-ASSETS> 2,100,179,188
<PER-SHARE-NAV-BEGIN> 21.60
<PER-SHARE-NII> 0.41
<PER-SHARE-GAIN-APPREC> 2.58
<PER-SHARE-DIVIDEND> (0.41)
<PER-SHARE-DISTRIBUTIONS> (2.05)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 22.13
<EXPENSE-RATIO> 0.53
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MORGAN STANLEY DEAN WITTER VARIABLE INVESTMENT SERIES - CAPITAL GROWTH
ANNUAL NSAR
DECEMBER 31, 1998
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - CAPTIAL GROWTH
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 109,140,721
<INVESTMENTS-AT-VALUE> 137,631,624
<RECEIVABLES> 1,140,034
<ASSETS-OTHER> 4,899
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 138,776,557
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 173,447
<TOTAL-LIABILITIES> 173,447
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 96,044,693
<SHARES-COMMON-STOCK> 6,806,997
<SHARES-COMMON-PRIOR> 6,947,418
<ACCUMULATED-NII-CURRENT> (424)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 14,067,938
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 28,490,903
<NET-ASSETS> 138,603,110
<DIVIDEND-INCOME> 316,623
<INTEREST-INCOME> 276,646
<OTHER-INCOME> 0
<EXPENSES-NET> 934,491
<NET-INVESTMENT-INCOME> (341,222)
<REALIZED-GAINS-CURRENT> 15,646,625
<APPREC-INCREASE-CURRENT> 6,997,899
<NET-CHANGE-FROM-OPS> 22,303,302
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (10,014)
<DISTRIBUTIONS-OF-GAINS> (10,080,542)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,431,494
<NUMBER-OF-SHARES-REDEEMED> (2,085,691)
<SHARES-REINVESTED> 513,776
<NET-CHANGE-IN-ASSETS> 11,503,034
<ACCUMULATED-NII-PRIOR> 9,662
<ACCUMULATED-GAINS-PRIOR> 8,843,005
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 862,257
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 934,491
<AVERAGE-NET-ASSETS> 132,654,867
<PER-SHARE-NAV-BEGIN> 18.29
<PER-SHARE-NII> (0.05)
<PER-SHARE-GAIN-APPREC> 3.59
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> (1.47)
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 20.36
<EXPENSE-RATIO> 0.70
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MORGAN STANELY DEAN WITTER VARIABLE INVESTMENT SERIES - GLOBAL DIVIDEND GROWTH
ANNUAL NSAR
DECEMBER 31, 1998
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - GLOBAL DIVIDEND GROWTH
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 437,456,748
<INVESTMENTS-AT-VALUE> 482,075,760
<RECEIVABLES> 2,196,656
<ASSETS-OTHER> 27,511
<OTHER-ITEMS-ASSETS> 565,563
<TOTAL-ASSETS> 484,865,490
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 637,926
<TOTAL-LIABILITIES> 637,926
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 414,618,546
<SHARES-COMMON-STOCK> 35,025,587
<SHARES-COMMON-PRIOR> 34,680,608
<ACCUMULATED-NII-CURRENT> 520,531
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 24,439,258
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 44,649,229
<NET-ASSETS> 484,227,564
<DIVIDEND-INCOME> 11,657,917
<INTEREST-INCOME> 734,562
<OTHER-INCOME> 0
<EXPENSES-NET> 4,119,267
<NET-INVESTMENT-INCOME> 8,273,212
<REALIZED-GAINS-CURRENT> 29,801,364
<APPREC-INCREASE-CURRENT> 16,207,523
<NET-CHANGE-FROM-OPS> 54,282,099
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (8,206,088)
<DISTRIBUTIONS-OF-GAINS> (52,205,069)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 5,251,149
<NUMBER-OF-SHARES-REDEEMED> (9,357,396)
<SHARES-REINVESTED> 4,451,226
<NET-CHANGE-IN-ASSETS> 2,614,104
<ACCUMULATED-NII-PRIOR> (74,436)
<ACCUMULATED-GAINS-PRIOR> 47,370,806
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3,698,722
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 4,119,267
<AVERAGE-NET-ASSETS> 493,162,938
<PER-SHARE-NAV-BEGIN> 13.89
<PER-SHARE-NII> 0.24
<PER-SHARE-GAIN-APPREC> 1.45
<PER-SHARE-DIVIDEND> (0.24)
<PER-SHARE-DISTRIBUTIONS> (1.52)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 13.82
<EXPENSE-RATIO> 0.84
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MORGAN STANLEY DEAN WITTER VARIABLE INVESTMENT SERIES - EUROPEAN GROWTH
ANNUAL NSAR
DECEMBER 31, 1998
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - EUROPEAN GROWTH
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 376,597,847
<INVESTMENTS-AT-VALUE> 509,880,098
<RECEIVABLES> 1,349,436
<ASSETS-OTHER> 29,313
<OTHER-ITEMS-ASSETS> 471,147
<TOTAL-ASSETS> 511,729,994
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,092,397
<TOTAL-LIABILITIES> 1,092,397
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 331,073,981
<SHARES-COMMON-STOCK> 18,785,057
<SHARES-COMMON-PRIOR> 16,628,832
<ACCUMULATED-NII-CURRENT> 3,134,104
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 43,112,022
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 133,317,490
<NET-ASSETS> 510,637,597
<DIVIDEND-INCOME> 7,644,102
<INTEREST-INCOME> 707,746
<OTHER-INCOME> 0
<EXPENSES-NET> 5,257,065
<NET-INVESTMENT-INCOME> 3,094,783
<REALIZED-GAINS-CURRENT> 43,252,405
<APPREC-INCREASE-CURRENT> 44,049,168
<NET-CHANGE-FROM-OPS> 90,396,356
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (5,476,236)
<DISTRIBUTIONS-OF-GAINS> (30,256,754)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 7,118,106
<NUMBER-OF-SHARES-REDEEMED> (6,252,813)
<SHARES-REINVESTED> 1,290,932
<NET-CHANGE-IN-ASSETS> 119,196,344
<ACCUMULATED-NII-PRIOR> 5,394,724
<ACCUMULATED-GAINS-PRIOR> 30,237,207
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4,705,416
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 5,257,065
<AVERAGE-NET-ASSETS> 472,970,716
<PER-SHARE-NAV-BEGIN> 23.54
<PER-SHARE-NII> 0.15
<PER-SHARE-GAIN-APPREC> 5.53
<PER-SHARE-DIVIDEND> (0.31)
<PER-SHARE-DISTRIBUTIONS> (1.73)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 27.18
<EXPENSE-RATIO> 1.11
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MORGAN STANLEY DEAN WITTER VARIABLE INVESTMENT SERIES - PACIFIC GROWTH
ANNUAL NSAR
DECEMBER 31, 1998
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - PACIFIC GROWTH
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 50,606,970
<INVESTMENTS-AT-VALUE> 52,538,411
<RECEIVABLES> 52,373
<ASSETS-OTHER> 126
<OTHER-ITEMS-ASSETS> 425,688
<TOTAL-ASSETS> 53,016,598
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 175,061
<TOTAL-LIABILITIES> 175,061
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 110,265,670
<SHARES-COMMON-STOCK> 10,269,558
<SHARES-COMMON-PRIOR> 11,264,299
<ACCUMULATED-NII-CURRENT> 411,637
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (59,610,315)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1,774,545
<NET-ASSETS> 52,841,537
<DIVIDEND-INCOME> 1,132,403
<INTEREST-INCOME> 212,841
<OTHER-INCOME> 0
<EXPENSES-NET> 840,501
<NET-INVESTMENT-INCOME> 504,743
<REALIZED-GAINS-CURRENT> (31,801,028)
<APPREC-INCREASE-CURRENT> 24,432,009
<NET-CHANGE-FROM-OPS> (6,864,276)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (2,947,935)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 13,473,730
<NUMBER-OF-SHARES-REDEEMED> (15,145,796)
<SHARES-REINVESTED> 677,325
<NET-CHANGE-IN-ASSETS> (16,062,000)
<ACCUMULATED-NII-PRIOR> 2,054,796
<ACCUMULATED-GAINS-PRIOR> (26,966,367)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 551,718
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 840,501
<AVERAGE-NET-ASSETS> 55,616,784
<PER-SHARE-NAV-BEGIN> 6.12
<PER-SHARE-NII> 0.06
<PER-SHARE-GAIN-APPREC> (0.75)
<PER-SHARE-DIVIDEND> (0.28)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 5.15
<EXPENSE-RATIO> 1.51
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MORGAN STANLEY DEAN WITTER VARIABLE INVESTMENT SERIES - CAPITAL APPRECIATION
ANNUAL NSAR
DECEMBER 31, 1998
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - CAPITAL APPRECIATION
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 28,295,346
<INVESTMENTS-AT-VALUE> 32,536,300
<RECEIVABLES> 51,141
<ASSETS-OTHER> 21,037
<OTHER-ITEMS-ASSETS> 60,263
<TOTAL-ASSETS> 32,668,741
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 63,924
<TOTAL-LIABILITIES> 63,924
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 34,478,487
<SHARES-COMMON-STOCK> 3,147,999
<SHARES-COMMON-PRIOR> 2,854,685
<ACCUMULATED-NII-CURRENT> 386,474
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (6,501,098)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4,240,954
<NET-ASSETS> 32,604,817
<DIVIDEND-INCOME> 86,097
<INTEREST-INCOME> 300,377
<OTHER-INCOME> 0
<EXPENSES-NET> 0
<NET-INVESTMENT-INCOME> 386,474
<REALIZED-GAINS-CURRENT> (6,243,234)
<APPREC-INCREASE-CURRENT> 2,856,814
<NET-CHANGE-FROM-OPS> (2,999,946)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (209,858)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,745,653
<NUMBER-OF-SHARES-REDEEMED> (1,470,199)
<SHARES-REINVESTED> 17,860
<NET-CHANGE-IN-ASSETS> 298,906
<ACCUMULATED-NII-PRIOR> 209,858
<ACCUMULATED-GAINS-PRIOR> (257,864)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 248,985
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 288,081
<AVERAGE-NET-ASSETS> 33,198,012
<PER-SHARE-NAV-BEGIN> 11.32
<PER-SHARE-NII> 0.12
<PER-SHARE-GAIN-APPREC> (1.01)
<PER-SHARE-DIVIDEND> (0.07)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.36
<EXPENSE-RATIO> 0.00
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MORGAN STANLEY DEAN WITTER VARIABLE INVESTMENT SERIES - EQUTIY FUND
ANNUAL NSAR
DECEMBER 31, 1998
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESMENT SERIES - EQUITY
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 979,326,065
<INVESTMENTS-AT-VALUE> 1,199,558,701
<RECEIVABLES> 10,409,806
<ASSETS-OTHER> 6,924
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1,209,975,431
<PAYABLE-FOR-SECURITIES> 70,270,953
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,291,755
<TOTAL-LIABILITIES> 71,562,708
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 757,548,016
<SHARES-COMMON-STOCK> 29,505,782
<SHARES-COMMON-PRIOR> 24,511,800
<ACCUMULATED-NII-CURRENT> 4,216
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 160,627,855
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 220,232,636
<NET-ASSETS> 1,138,412,723
<DIVIDEND-INCOME> 5,747,355
<INTEREST-INCOME> 6,083,933
<OTHER-INCOME> 0
<EXPENSES-NET> 4,906,563
<NET-INVESTMENT-INCOME> 6,924,725
<REALIZED-GAINS-CURRENT> 161,754,931
<APPREC-INCREASE-CURRENT> 89,582,262
<NET-CHANGE-FROM-OPS> 258,261,918
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (6,924,673)
<DISTRIBUTIONS-OF-GAINS> (114,146,703)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 7,421,841
<NUMBER-OF-SHARES-REDEEMED> (5,884,436)
<SHARES-REINVESTED> 3,456,577
<NET-CHANGE-IN-ASSETS> 315,322,441
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (23,243,545)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4,753,680
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 4,906,563
<AVERAGE-NET-ASSETS> 951,302,944
<PER-SHARE-NAV-BEGIN> 33.58
<PER-SHARE-NII> 0.25
<PER-SHARE-GAIN-APPREC> 9.47
<PER-SHARE-DIVIDEND> (0.25)
<PER-SHARE-DISTRIBUTIONS> (4.47)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 38.58
<EXPENSE-RATIO> 0.52
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MORGAN STANLEY DEAN WITTER VARIABLE INVESTMENT SERIES - S&P 500 INDEX FUND
ANNUAL NSAR
DECEMBER 31, 1998
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - S&P 500 INDEX FUND
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 44,667,149
<INVESTMENTS-AT-VALUE> 48,743,934
<RECEIVABLES> 434,743
<ASSETS-OTHER> 12,512
<OTHER-ITEMS-ASSETS> 96,318
<TOTAL-ASSETS> 49,287,507
<PAYABLE-FOR-SECURITIES> 503,347
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 52,192
<TOTAL-LIABILITIES> 555,539
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 44,127,014
<SHARES-COMMON-STOCK> 4,343,636
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 244,990
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 186,052
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4,173,912
<NET-ASSETS> 48,731,968
<DIVIDEND-INCOME> 183,550
<INTEREST-INCOME> 61,440
<OTHER-INCOME> 0
<EXPENSES-NET> 0
<NET-INVESTMENT-INCOME> 244,990
<REALIZED-GAINS-CURRENT> 186,052
<APPREC-INCREASE-CURRENT> 4,173,912
<NET-CHANGE-FROM-OPS> 4,604,954
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 4,974,649
<NUMBER-OF-SHARES-REDEEMED> (631,013)
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 48,731,968
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 52,991
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 78,579
<AVERAGE-NET-ASSETS> 21,207,897
<PER-SHARE-NAV-BEGIN> 10.00
<PER-SHARE-NII> 0.06
<PER-SHARE-GAIN-APPREC> 1.16
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 11.22
<EXPENSE-RATIO> 0.00
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MORGAN STANLEY DEAN WITTER VARIABLE INVESTMENT SERIES - COMPETITIVE EDGE
ANNUAL NSAR
DECEMBER 31, 1998
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - COMPETITIVE EDGE
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 34,462,517
<INVESTMENTS-AT-VALUE> 36,457,919
<RECEIVABLES> 27,444
<ASSETS-OTHER> 24,216
<OTHER-ITEMS-ASSETS> 60,532
<TOTAL-ASSETS> 36,570,111
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 31,331
<TOTAL-LIABILITIES> 31,331
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 35,547,604
<SHARES-COMMON-STOCK> 3,722,740
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 267,028
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (1,271,376)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1,995,524
<NET-ASSETS> 36,538,780
<DIVIDEND-INCOME> 153,010
<INTEREST-INCOME> 113,348
<OTHER-INCOME> 0
<EXPENSES-NET> 0
<NET-INVESTMENT-INCOME> 266,358
<REALIZED-GAINS-CURRENT> (1,270,706)
<APPREC-INCREASE-CURRENT> 1,995,524
<NET-CHANGE-FROM-OPS> 991,176
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 5,131,070
<NUMBER-OF-SHARES-REDEEMED> (1,408,330)
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 36,538,780
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 99,771
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 140,174
<AVERAGE-NET-ASSETS> 24,572,513
<PER-SHARE-NAV-BEGIN> 10.00
<PER-SHARE-NII> 0.07
<PER-SHARE-GAIN-APPREC> (0.25)
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 9.82
<EXPENSE-RATIO> 0.00
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MORGAN STANLEY DEAN WITTER VARIABLE INVESTMENT SERIES - STRATEGIST FUND
ANNUAL NSAR
DECEMBER 31, 1998
</LEGEND>
<CIK> 0000716716
<NAME> MSDW VARIABLE INVESTMENT SERIES - STRATEGIST FUND
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 471,836,733
<INVESTMENTS-AT-VALUE> 632,185,804
<RECEIVABLES> 2,308,805
<ASSETS-OTHER> 90,081
<OTHER-ITEMS-ASSETS> 1,786
<TOTAL-ASSETS> 634,586,476
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 652,196
<TOTAL-LIABILITIES> 652,196
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 480,626,039
<SHARES-COMMON-STOCK> 38,098,404
<SHARES-COMMON-PRIOR> 33,589,395
<ACCUMULATED-NII-CURRENT> 458
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (7,041,288)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 160,349,071
<NET-ASSETS> 633,934,280
<DIVIDEND-INCOME> 11,565,956
<INTEREST-INCOME> 4,125,742
<OTHER-INCOME> 0
<EXPENSES-NET> 2,871,634
<NET-INVESTMENT-INCOME> 12,820,064
<REALIZED-GAINS-CURRENT> (7,041,288)
<APPREC-INCREASE-CURRENT> 125,871,829
<NET-CHANGE-FROM-OPS> 131,650,605
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (12,819,604)
<DISTRIBUTIONS-OF-GAINS> (52,303,444)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 7,783,951
<NUMBER-OF-SHARES-REDEEMED> (7,464,531)
<SHARES-REINVESTED> 4,189,589
<NET-CHANGE-IN-ASSETS> 136,906,135
<ACCUMULATED-NII-PRIOR> 62
<ACCUMULATED-GAINS-PRIOR> 52,303,380
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2,762,516
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,871,634
<AVERAGE-NET-ASSETS> 552,503,283
<PER-SHARE-NAV-BEGIN> 14.80
<PER-SHARE-NII> 0.36
<PER-SHARE-GAIN-APPREC> 3.40
<PER-SHARE-DIVIDEND> (0.36)
<PER-SHARE-DISTRIBUTIONS> (1.56)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 16.64
<EXPENSE-RATIO> 0.52
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
