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

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> Cash Management Fund
<SERIES>
   <NUMBER>001
   <NAME>Salomon Brothers Investment Series

<S>                             <C>
<PERIOD-TYPE>                  6-MOS
<FISCAL-YEAR-END>                               Dec-31-2000
<PERIOD-END>                                    Jun-30-2000
<INVESTMENTS-AT-COST>                            37,117,466
<INVESTMENTS-AT-VALUE>                           37,117,466
<RECEIVABLES>                                       242,794
<ASSETS-OTHER>                                       49,000
<OTHER-ITEMS-ASSETS>                                      0
<TOTAL-ASSETS>                                   37,409,260
<PAYABLE-FOR-SECURITIES>                                  0
<SENIOR-LONG-TERM-DEBT>                                   0
<OTHER-ITEMS-LIABILITIES>                           216,052
<TOTAL-LIABILITIES>                                 216,052
<SENIOR-EQUITY>                                           0
<PAID-IN-CAPITAL-COMMON>                         37,195,038
<SHARES-COMMON-STOCK>                            12,002,296
<SHARES-COMMON-PRIOR>                            20,477,014
<ACCUMULATED-NII-CURRENT>                                 0
<OVERDISTRIBUTION-NII>                                    0
<ACCUMULATED-NET-GAINS>                              (1,830)
<OVERDISTRIBUTION-GAINS>                                  0
<ACCUM-APPREC-OR-DEPREC>                                  0
<NET-ASSETS>                                     37,193,208
<DIVIDEND-INCOME>                                         0
<INTEREST-INCOME>                                 1,215,055
<OTHER-INCOME>                                            0
<EXPENSES-NET>                                      105,959
<NET-INVESTMENT-INCOME>                           1,109,096
<REALIZED-GAINS-CURRENT>                                357
<APPREC-INCREASE-CURRENT>                                 0
<NET-CHANGE-FROM-OPS>                             1,109,453
<EQUALIZATION>                                            0
<DISTRIBUTIONS-OF-INCOME>                           439,261
<DISTRIBUTIONS-OF-GAINS>                                  0
<DISTRIBUTIONS-OTHER>                                     0
<NUMBER-OF-SHARES-SOLD>                           5,822,722
<NUMBER-OF-SHARES-REDEEMED>                      14,423,289
<SHARES-REINVESTED>                                 125,849
<NET-CHANGE-IN-ASSETS>                          (14,951,218)
<ACCUMULATED-NII-PRIOR>                                   0
<ACCUMULATED-GAINS-PRIOR>                            (2,187)
<OVERDISTRIB-NII-PRIOR>                                   0
<OVERDIST-NET-GAINS-PRIOR>                                0
<GROSS-ADVISORY-FEES>                                49,444
<INTEREST-EXPENSE>                                        0
<GROSS-EXPENSE>                                     130,484
<AVERAGE-NET-ASSETS>                             15,661,052
<PER-SHARE-NAV-BEGIN>                                 1.000
<PER-SHARE-NII>                                       0.028
<PER-SHARE-GAIN-APPREC>                               0.000
<PER-SHARE-DIVIDEND>                                  0.028
<PER-SHARE-DISTRIBUTIONS>                             0.000
<RETURNS-OF-CAPITAL>                                  0.000
<PER-SHARE-NAV-END>                                   1.000
<EXPENSE-RATIO>                                        0.54



</TABLE>