<PAGE> PAGE 1
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007 C010400 4
007 C020400 PRUDENTIAL BOND MARKET INDEX FUND
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<PAGE> PAGE 2
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<PAGE> PAGE 3
015 A00AA01 STATE STREET BANK & TRUST COMPANY
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<PAGE> PAGE 4
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<PAGE> PAGE 5
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<PAGE> PAGE 6
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<PAGE> PAGE 7
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<PAGE> PAGE 8
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<PAGE> PAGE 9
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<PAGE> PAGE 10
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<PAGE> PAGE 11
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<PAGE> PAGE 12
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<PAGE> PAGE 13
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<PAGE> PAGE 14
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<PAGE> PAGE 15
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<PAGE> PAGE 16
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<PAGE> PAGE 17
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<PAGE> PAGE 18
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<PAGE> PAGE 19
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<PAGE> PAGE 29
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SIGNATURE GRACE TORRES
TITLE ASSISTANT TREASURER
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
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<FISCAL-YEAR-END> SEP-30-1999
<PERIOD-END> MAR-31-1999
<INVESTMENTS-AT-COST> 19,342,343
<INVESTMENTS-AT-VALUE> 22,652,968
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<EXPENSES-NET> 63,308
<NET-INVESTMENT-INCOME> 68,709
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<APPREC-INCREASE-CURRENT> 2,742,177
<NET-CHANGE-FROM-OPS> 2,888,054
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (403,257)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> (52,600)
<NUMBER-OF-SHARES-SOLD> 2,987,825
<NUMBER-OF-SHARES-REDEEMED> (1,210,549)
<SHARES-REINVESTED> 455,044
<NET-CHANGE-IN-ASSETS> 4,664,517
<ACCUMULATED-NII-PRIOR> 175,125
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<PER-SHARE-NAV-BEGIN> 10.64
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<EXPENSE-RATIO> 0.60
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.00
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000887991
<NAME> PRUDENTIAL INDEX SERIES FUND
<SERIES>
<NUMBER> 004
<NAME> PACIFIC INDEX FUND (CLASS Z)
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> SEP-30-1999
<PERIOD-END> MAR-31-1999
<INVESTMENTS-AT-COST> 25,364,341
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<OTHER-ITEMS-LIABILITIES> 89,286
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<SHARES-COMMON-PRIOR> 2,578,120
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<ACCUMULATED-NET-GAINS> (610,927)
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<NET-ASSETS> (5,276,196)
<DIVIDEND-INCOME> 137,060
<INTEREST-INCOME> 5,302
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<EXPENSES-NET> 60,804
<NET-INVESTMENT-INCOME> 81,558
<REALIZED-GAINS-CURRENT> (265,622)
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<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (156,767)
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<NUMBER-OF-SHARES-SOLD> 1,892,138
<NUMBER-OF-SHARES-REDEEMED> (1,066,989)
<SHARES-REINVESTED> 156,767
<NET-CHANGE-IN-ASSETS> 7,318,853
<ACCUMULATED-NII-PRIOR> 0
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<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (52,506)
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<PER-SHARE-NAV-BEGIN> 6.38
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<EXPENSE-RATIO> 0.60
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.00
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000887991
<NAME> PRUDENTIAL INDEX SERIES FUND
<SERIES>
<NUMBER> 004
<NAME> SMALL CAP-INDEX FUND (CLASS Z)
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> SEP-30-1999
<PERIOD-END> MAR-31-1999
<INVESTMENTS-AT-COST> 30,214,478
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<SHARES-COMMON-PRIOR> 2,502,249
<ACCUMULATED-NII-CURRENT> 580,544
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<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (4,259,363)
<NET-ASSETS> (5,561,700)
<DIVIDEND-INCOME> 101,252
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<NET-INVESTMENT-INCOME> 83,478
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<NUMBER-OF-SHARES-SOLD> 7,469,219
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<ACCUMULATED-NII-PRIOR> 0
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<OVERDISTRIB-NII-PRIOR> 0
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<GROSS-ADVISORY-FEES> 37,254
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (40,583)
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<PER-SHARE-NAV-BEGIN> 8.09
<PER-SHARE-NII> 0.02
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<PER-SHARE-DIVIDEND> (0.05)
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<PER-SHARE-NAV-END> 8.46
<EXPENSE-RATIO> 0.50
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.00
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000887991
<NAME> PRUDENTIAL INDEX SERIES FUND
<SERIES>
<NUMBER> 001
<NAME> STOCK INDEX FUND (CLASS Z)
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> SEP-30-1999
<PERIOD-END> MAR-31-1999
<INVESTMENTS-AT-COST> 1,250,965,355
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<PAID-IN-CAPITAL-COMMON> 1,230,910,928
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<SHARES-COMMON-PRIOR> 44,143,076
<ACCUMULATED-NII-CURRENT> 5,105,325
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 12,808,441
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 405,871,487
<NET-ASSETS> 1,654,696,181
<DIVIDEND-INCOME> 8,568,489
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<EXPENSES-NET> 2,306,038
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<REALIZED-GAINS-CURRENT> 16,622,232
<APPREC-INCREASE-CURRENT> 271,722,416
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<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (12,614,911)
<DISTRIBUTIONS-OF-GAINS> (8,023,152)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 692,642,494
<NUMBER-OF-SHARES-REDEEMED> (355,112,076)
<SHARES-REINVESTED> 20,622,769
<NET-CHANGE-IN-ASSETS> 633,914,120
<ACCUMULATED-NII-PRIOR> 9,665,888
<ACCUMULATED-GAINS-PRIOR> 4,209,361
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2,005,545
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,975,245
<AVERAGE-NET-ASSETS> 542,470,000
<PER-SHARE-NAV-BEGIN> 23.11
<PER-SHARE-NII> 0.090
<PER-SHARE-GAIN-APPREC> 6.16
<PER-SHARE-DIVIDEND> (0.260)
<PER-SHARE-DISTRIBUTIONS> (0.18)
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 28.92
<EXPENSE-RATIO> 0.40
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.00
</TABLE>