PRICE T ROWE INDEX TRUST INC
NSAR-B, 2000-02-29
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<PAGE>      PAGE  1
000 B000000 12/31/99
000 C000000 0000858581
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0.a
000 J000000 U
001 A000000 T. ROWE PRICE INDEX TRUST, INC.
001 B000000 811-5986
001 C000000 4103452000
002 A000000 100 EAST PRATT STREET
002 B000000 BALTIMORE
002 C000000 MD
002 D010000 21202
003  000000 N
004  000000 N
005  000000 N
006  000000 N
007 A000000 Y
007 B000000  3
007 C010100  1
007 C020100 T. ROWE PRICE EXTENDED EQUITY MARKET INDEX FD
007 C030100 N
007 C010200  2
007 C020200 T. ROWE PRICE TOTAL EQUITY MARKET INDEX FUND
007 C030200 N
007 C010300  3
007 C020300 T. ROWE PRICE TOTAL EQUITY INDEX 500 FUND
007 C030300 N
007 C010400  4
007 C010500  5
007 C010600  6
007 C010700  7
007 C010800  8
007 C010900  9
007 C011000 10
008 A00AA01 T. ROWE PRICE ASSOCIATES, INC.
008 B00AA01 A
008 C00AA01 801-856
008 D01AA01 BALTIMORE
008 D02AA01 MD
008 D03AA01 21202
020 A000001 INVESTMENT TECHNOLOGY
020 B000001 95-4339369
020 C000001    284
020 A000002 INSTINET (INCL. CROSS. NETWORK).
020 B000002 13-3443395
020 C000002    138
020 A000003 GOLDMAN SACHS
<PAGE>      PAGE  2
020 B000003 13-5108880
020 C000003      8
020 A000004 LEHMAN BROTHERS
020 B000004 13-2518466
020 C000004      1
020 A000005 STEPHENS INC
020 B000005 71-0211822
020 C000005      1
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020 C000010      0
021  000000      433
022 A000001 C.S. FIRST BOSTON
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022 A000002 CHASE SECURITIES
022 B000002 13-3112953
022 C000002     12241
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022 A000003 DONALDSON LUFKIN & JENRETTE
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022 C000003      6278
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022 D000004      1081
022 A000005 GOLDMAN SACHS
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022 C000005      1723
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022 A000006 B-TRADE SERVICES (BLOOMBERG)
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<PAGE>      PAGE  3
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054 F00AA00 N
054 G00AA00 N
054 H00AA00 Y
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054 J00AA00 Y
054 K00AA00 N
054 L00AA00 N
054 M00AA00 Y
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<PAGE>      PAGE  4
062 A00AA00 N
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077 A000000 Y
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080 A00AA00 ICI MUTUAL INSURANCE COMPANY
080 B00AA00 N/A
080 C00AA00    60000
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082 A00AA00 N
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025 B000101 13-2741729
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<PAGE>      PAGE  5
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<PAGE>      PAGE  6
048 J020100 0.000
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048 K020100 0.000
049  000100 N
050  000100 N
051  000100 N
052  000100 N
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055 A000100 N
055 B000100 N
056  000100 Y
057  000100 N
066 A000100 Y
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066 C000100 N
066 D000100 N
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070 C020100 N
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070 E020100 N
070 F010100 Y
070 F020100 Y
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070 G020100 N
070 H010100 Y
070 H020100 N
070 I010100 N
070 I020100 N
070 J010100 N
070 J020100 N
070 K010100 Y
070 K020100 Y
070 L010100 N
070 L020100 N
070 M010100 N
070 M020100 N
070 N010100 Y
070 N020100 N
<PAGE>      PAGE  7
070 O010100 Y
070 O020100 N
070 P010100 Y
070 P020100 N
070 Q010100 N
070 Q020100 N
070 R010100 N
070 R020100 N
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<PAGE>      PAGE  8
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076  000100     0.00
024  000200 Y
025 A000201 GOLDMAN SACHS
025 B000201 13-5108880
025 C000201 E
025 D000201     151
025 A000202 LEHMAN BROTHERS
025 B000202 13-2518466
025 C000202 E
025 D000202     119
025 A000203 DONALDSON LUFKIN & JENRETTE
025 B000203 13-2741729
025 C000203 E
025 D000203      73
025 A000204 DELETE
025 D000204       0
025 D000205       0
025 D000206       0
025 D000207       0
025 D000208       0
028 A010200     13751
<PAGE>      PAGE  9
028 A020200         0
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037  000200 Y
038  000200     28
045  000200 Y
046  000200 N
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048 B020200 0.000
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048 F010200        0
048 F020200 0.000
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048 G020200 0.000
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048 H020200 0.000
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<PAGE>      PAGE  10
048 I020200 0.000
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048 K010200        0
048 K020200 0.000
049  000200 N
050  000200 N
051  000200 N
052  000200 N
053 A000200 N
070 A010200 Y
070 A020200 N
070 B010200 Y
070 B020200 N
070 C010200 N
070 C020200 N
070 D010200 Y
070 D020200 N
070 E010200 N
070 E020200 N
070 F010200 Y
070 F020200 Y
070 G010200 Y
070 G020200 N
070 H010200 Y
070 H020200 N
070 I010200 N
070 I020200 N
070 J010200 N
070 J020200 N
070 K010200 Y
070 K020200 Y
070 L010200 N
070 L020200 N
070 M010200 N
070 M020200 N
070 N010200 Y
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<PAGE>      PAGE  11
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<PAGE>      PAGE  12
074 P000200        0
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075 B000200   128260
076  000200     0.00
024  000300 Y
025 A000301 LEHMAN BROTHERS
025 B000301 13-2518466
025 C000301 E
025 D000301    4130
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025 D000306       0
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<PAGE>      PAGE  13
028 F020300     34779
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049  000300 N
050  000300 N
051  000300 N
052  000300 N
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070 A010300 Y
070 A020300 N
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070 B020300 N
070 C010300 N
070 C020300 N
070 D010300 Y
070 D020300 N
070 E010300 N
<PAGE>      PAGE  14
070 E020300 N
070 F010300 Y
070 F020300 Y
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070 G020300 N
070 H010300 Y
070 H020300 N
070 I010300 N
070 I020300 N
070 J010300 N
070 J020300 N
070 K010300 Y
070 K020300 Y
070 L010300 N
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070 M010300 N
070 M020300 N
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<PAGE>      PAGE  15
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<PAGE>      PAGE  16
SIGNATURE   JAMES RIEPE
TITLE       VICE PRESIDENT

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

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000858581
<NAME> T. ROWE PRICE EXTENDED EQUITY MARKET INDEX FUND

<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                            45557
<INVESTMENTS-AT-VALUE>                           54423
<RECEIVABLES>                                      511
<ASSETS-OTHER>                                      30
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   54964
<PAYABLE-FOR-SECURITIES>                           664
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                           81
<TOTAL-LIABILITIES>                                745
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         43773
<SHARES-COMMON-STOCK>                             3858
<SHARES-COMMON-PRIOR>                             1882
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                             (2)
<ACCUMULATED-NET-GAINS>                           1309
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                          9139
<NET-ASSETS>                                     54219
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<OTHER-INCOME>                                       0
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<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        (346)
<DISTRIBUTIONS-OF-GAINS>                        (1833)
<DISTRIBUTIONS-OTHER>                                0
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<ACCUMULATED-NII-PRIOR>                              2
<ACCUMULATED-GAINS-PRIOR>                          629
<OVERDISTRIB-NII-PRIOR>                              0
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<GROSS-ADVISORY-FEES>                                0
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<PER-SHARE-NAV-BEGIN>                            11.02
<PER-SHARE-NII>                                    0.1
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<PER-SHARE-DIVIDEND>                             (0.1)
<PER-SHARE-DISTRIBUTIONS>                       (0.53)
<RETURNS-OF-CAPITAL>                            (0.04)
<PER-SHARE-NAV-END>                              14.05
<EXPENSE-RATIO>                                    0.4


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

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000858581
<NAME> T. ROWE PRICE TOTAL EQUITY MARKET INDEX FUND

<S>                             <C>
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<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
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<INVESTMENTS-AT-VALUE>                          200038
<RECEIVABLES>                                      775
<ASSETS-OTHER>                                      15
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  200828
<PAYABLE-FOR-SECURITIES>                          1007
<SENIOR-LONG-TERM-DEBT>                              0
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<TOTAL-LIABILITIES>                               1402
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        166031
<SHARES-COMMON-STOCK>                            13506
<SHARES-COMMON-PRIOR>                             5023
<ACCUMULATED-NII-CURRENT>                           35
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                            361
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         33000
<NET-ASSETS>                                    199427
<DIVIDEND-INCOME>                                 1509
<INTEREST-INCOME>                                  257
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     512
<NET-INVESTMENT-INCOME>                           1254
<REALIZED-GAINS-CURRENT>                          1631
<APPREC-INCREASE-CURRENT>                        26722
<NET-CHANGE-FROM-OPS>                            29607
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                       (1186)
<DISTRIBUTIONS-OF-GAINS>                        (1380)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          10836
<NUMBER-OF-SHARES-REDEEMED>                     (2535)
<SHARES-REINVESTED>                                182
<NET-CHANGE-IN-ASSETS>                          138217
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                          110
<OVERDISTRIB-NII-PRIOR>                           (33)
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                                0
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    512
<AVERAGE-NET-ASSETS>                            128260
<PER-SHARE-NAV-BEGIN>                            12.19
<PER-SHARE-NII>                                   0.12
<PER-SHARE-GAIN-APPREC>                           2.69
<PER-SHARE-DIVIDEND>                            (0.11)
<PER-SHARE-DISTRIBUTIONS>                       (0.12)
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              14.77
<EXPENSE-RATIO>                                    0.4


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000858581
<NAME> T. ROWE PRICE EQUITY INDEX 500 FUND

<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<INVESTMENTS-AT-COST>                          3245878
<INVESTMENTS-AT-VALUE>                         5058905
<RECEIVABLES>                                   157007
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                                74
<TOTAL-ASSETS>                                 5215838
<PAYABLE-FOR-SECURITIES>                          1446
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       165302
<TOTAL-LIABILITIES>                             166748
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       3220582
<SHARES-COMMON-STOCK>                           127627
<SHARES-COMMON-PRIOR>                           100277
<ACCUMULATED-NII-CURRENT>                          154
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                           1663
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       1815292
<NET-ASSETS>                                   5049091
<DIVIDEND-INCOME>                                54618
<INTEREST-INCOME>                                 4424
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                   17240
<NET-INVESTMENT-INCOME>                          42265
<REALIZED-GAINS-CURRENT>                         38883
<APPREC-INCREASE-CURRENT>                       734191
<NET-CHANGE-FROM-OPS>                           815339
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      (41749)
<DISTRIBUTIONS-OF-GAINS>                       (37895)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          64085
<NUMBER-OF-SHARES-REDEEMED>                    (38868)
<SHARES-REINVESTED>                               2133
<NET-CHANGE-IN-ASSETS>                         1701598
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                      1081101
<OVERDISTRIB-NII-PRIOR>                          (362)
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             8301
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  17254
<AVERAGE-NET-ASSETS>                           4314211
<PER-SHARE-NAV-BEGIN>                            33.38
<PER-SHARE-NII>                                   0.34
<PER-SHARE-GAIN-APPREC>                           6.49
<PER-SHARE-DIVIDEND>                            (0.34)
<PER-SHARE-DISTRIBUTIONS>                       (0.31)
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              39.56
<EXPENSE-RATIO>                                    0.4


</TABLE>


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