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

 

<ARTICLE> 6
<CIK>               312538
<NAME>              Centennial Money Market Trust

                                                                     
<PERIOD-TYPE>                                                           12-MOS
<FISCAL-YEAR-END>                                                       JUN-30-2000
<PERIOD-START>                                                          JUL-01-1999
<PERIOD-END>                                                            JUN-30-2000
<INVESTMENTS-AT-COST>                                                              18,208,700,617
<INVESTMENTS-AT-VALUE>                                                             18,208,700,617
<RECEIVABLES>                                                                         669,522,476
<ASSETS-OTHER>                                                                          3,207,170
<OTHER-ITEMS-ASSETS>                                                                   80,692,757
<TOTAL-ASSETS>                                                                     18,962,123,020
<PAYABLE-FOR-SECURITIES>                                                                        0
<SENIOR-LONG-TERM-DEBT>                                                                         0
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<SENIOR-EQUITY>                                                                                 0
<PAID-IN-CAPITAL-COMMON>                                                           18,733,718,429
<SHARES-COMMON-STOCK>                                                              18,734,251,144
<SHARES-COMMON-PRIOR>                                                              17,821,095,704
<ACCUMULATED-NII-CURRENT>                                                                       0
<OVERDISTRIBUTION-NII>                                                                          0
<ACCUMULATED-NET-GAINS>                                                                    80,142
<OVERDISTRIBUTION-GAINS>                                                                        0
<ACCUM-APPREC-OR-DEPREC>                                                                        0
<NET-ASSETS>                                                                       18,733,798,571
<DIVIDEND-INCOME>                                                                               0
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<OTHER-INCOME>                                                                                  0
<EXPENSES-NET>                                                                        124,526,660
<NET-INVESTMENT-INCOME>                                                               963,946,776
<REALIZED-GAINS-CURRENT>                                                                    1,668
<APPREC-INCREASE-CURRENT>                                                                       0
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<EQUALIZATION>                                                                                  0
<DISTRIBUTIONS-OF-INCOME>                                                             963,946,776
<DISTRIBUTIONS-OF-GAINS>                                                                        0
<DISTRIBUTIONS-OTHER>                                                                           0
<NUMBER-OF-SHARES-SOLD>                                                            59,623,565,708
<NUMBER-OF-SHARES-REDEEMED>                                                        59,638,830,004
<SHARES-REINVESTED>                                                                   928,419,736
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<ACCUMULATED-NII-PRIOR>                                                                         0
<ACCUMULATED-GAINS-PRIOR>                                                                  78,474
<OVERDISTRIB-NII-PRIOR>                                                                         0
<OVERDIST-NET-GAINS-PRIOR>                                                                      0
<GROSS-ADVISORY-FEES>                                                                  62,139,589
<INTEREST-EXPENSE>                                                                              0
<GROSS-EXPENSE>                                                                       124,640,628
<AVERAGE-NET-ASSETS>                                                               18,537,000,000
<PER-SHARE-NAV-BEGIN>                                                                        1.00
<PER-SHARE-NII>                                                                              0.05
<PER-SHARE-GAIN-APPREC>                                                                      0.00
<PER-SHARE-DIVIDEND>                                                                         0.05
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<RETURNS-OF-CAPITAL>                                                                         0.00
<PER-SHARE-NAV-END>                                                                          1.00
<EXPENSE-RATIO>                                                                              0.67
[AVG-DEBT-OUTSTANDING]                                                                          0
[AVG-DEBT-PER-SHARE]                                                                         0.00