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

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> High Yield Bond Fund
<SERIES>
   <NUMBER>007
   <NAME>The Salomon Brothers Investment Series

<S>                             <C>
<PERIOD-TYPE>                  6-MOS
<FISCAL-YEAR-END>                               Dec-31-2000
<PERIOD-END>                                    Jun-30-2000
<INVESTMENTS-AT-COST>                           539,986,153
<INVESTMENTS-AT-VALUE>                          479,221,369
<RECEIVABLES>                                    14,242,631
<ASSETS-OTHER>                                          785
<OTHER-ITEMS-ASSETS>                                      0
<TOTAL-ASSETS>                                  493,464,785
<PAYABLE-FOR-SECURITIES>                          2,029,868
<SENIOR-LONG-TERM-DEBT>                                   0
<OTHER-ITEMS-LIABILITIES>                         6,340,281
<TOTAL-LIABILITIES>                               8,370,149
<SENIOR-EQUITY>                                           0
<PAID-IN-CAPITAL-COMMON>                        641,608,281
<SHARES-COMMON-STOCK>                            12,829,423
<SHARES-COMMON-PRIOR>                            13,244,504
<ACCUMULATED-NII-CURRENT>                        (3,558,310)
<OVERDISTRIBUTION-NII>                                    0
<ACCUMULATED-NET-GAINS>                         (75,057,551)
<OVERDISTRIBUTION-GAINS>                                  0
<ACCUM-APPREC-OR-DEPREC>                        (77,897,784)
<NET-ASSETS>                                    485,094,636
<DIVIDEND-INCOME>                                   136,846
<INTEREST-INCOME>                                31,896,222
<OTHER-INCOME>                                            0
<EXPENSES-NET>                                    4,362,006
<NET-INVESTMENT-INCOME>                          27,671,062
<REALIZED-GAINS-CURRENT>                           (975,179)
<APPREC-INCREASE-CURRENT>                       (31,513,302)
<NET-CHANGE-FROM-OPS>                            (4,817,419)
<EQUALIZATION>                                            0
<DISTRIBUTIONS-OF-INCOME>                         6,999,533
<DISTRIBUTIONS-OF-GAINS>                                  0
<DISTRIBUTIONS-OTHER>                                     0
<NUMBER-OF-SHARES-SOLD>                          16,301,225
<NUMBER-OF-SHARES-REDEEMED>                      17,053,295
<SHARES-REINVESTED>                                 336,989
<NET-CHANGE-IN-ASSETS>                          (50,369,603)
<ACCUMULATED-NII-PRIOR>                         659,431,301
<ACCUMULATED-GAINS-PRIOR>                        (3,044,863)
<OVERDISTRIB-NII-PRIOR>                                   0
<OVERDIST-NET-GAINS-PRIOR>                                0
<GROSS-ADVISORY-FEES>                             2,028,125
<INTEREST-EXPENSE>                                        0
<GROSS-EXPENSE>                                   4,362,006
<AVERAGE-NET-ASSETS>                            120,223,321
<PER-SHARE-NAV-BEGIN>                                 9.480
<PER-SHARE-NII>                                       0.520
<PER-SHARE-GAIN-APPREC>                              (0.580)
<PER-SHARE-DIVIDEND>                                  0.530
<PER-SHARE-DISTRIBUTIONS>                             0.000
<RETURNS-OF-CAPITAL>                                  0.000
<PER-SHARE-NAV-END>                                   8.890
<EXPENSE-RATIO>                                        1.22



</TABLE>