[ARTICLE] 6
[CIK] 0000880366
[NAME] SMITH BARNEY INVESTMENT TRUST
[SERIES]
   [NUMBER] 005
   [NAME] SMITH BARNEY S & P 500 INDEX FUND CLASS D
<TABLE>
<S>                             <C>
[PERIOD-TYPE]                   YEAR
[FISCAL-YEAR-END]                          NOV-30-1999
[PERIOD-END]                               NOV-30-1999
[INVESTMENTS-AT-COST]                      212,402,885
[INVESTMENTS-AT-VALUE]                     235,958,691
[RECEIVABLES]                                2,586,913
[ASSETS-OTHER]                                       0
[OTHER-ITEMS-ASSETS]                                 0
[TOTAL-ASSETS]                             238,545,604
[PAYABLE-FOR-SECURITIES]                       289,987
[SENIOR-LONG-TERM-DEBT]                              0
[OTHER-ITEMS-LIABILITIES]                      400,828
[TOTAL-LIABILITIES]                            690,815
[SENIOR-EQUITY]                                      0
[PAID-IN-CAPITAL-COMMON]                   212,828,607
[SHARES-COMMON-STOCK]                          984,943
[SHARES-COMMON-PRIOR]                          150,961
[ACCUMULATED-NII-CURRENT]                    1,263,970
[OVERDISTRIBUTION-NII]                               0
[ACCUMULATED-NET-GAINS]                        206,406
[OVERDISTRIBUTION-GAINS]                             0
[ACCUM-APPREC-OR-DEPREC]                    23,555,806
[NET-ASSETS]                               237,854,789
[DIVIDEND-INCOME]                            1,952,792
[INTEREST-INCOME]                              260,666
[OTHER-INCOME]                                       0
[EXPENSES-NET]                                 894,646
[NET-INVESTMENT-INCOME]                      1,318,812
[REALIZED-GAINS-CURRENT]                     1,163,018
[APPREC-INCREASE-CURRENT]                   19,908,774
[NET-CHANGE-FROM-OPS]                       22,390,604
[EQUALIZATION]                                       0
[DISTRIBUTIONS-OF-INCOME]                       11,886
[DISTRIBUTIONS-OF-GAINS]                        60,450
[DISTRIBUTIONS-OTHER]                                0
[NUMBER-OF-SHARES-SOLD]                      2,270,347
[NUMBER-OF-SHARES-REDEEMED]                  1,441,526
[SHARES-REINVESTED]                              5,161
[NET-CHANGE-IN-ASSETS]                     180,857,831
[ACCUMULATED-NII-PRIOR]                        259,754
[ACCUMULATED-GAINS-PRIOR]                       83,845
[OVERDISTRIB-NII-PRIOR]                              0
[OVERDIST-NET-GAINS-PRIOR]                           0
[GROSS-ADVISORY-FEES]                          388,545
[INTEREST-EXPENSE]                                   0
[GROSS-EXPENSE]                              1,016,949
[AVERAGE-NET-ASSETS]                         9,333,900
[PER-SHARE-NAV-BEGIN]                            11.99
[PER-SHARE-NII]                                   0.17
[PER-SHARE-GAIN-APPREC]                           2.26
[PER-SHARE-DIVIDEND]                              0.07
[PER-SHARE-DISTRIBUTIONS]                         0.07
[RETURNS-OF-CAPITAL]                              0.00
[PER-SHARE-NAV-END]                              14.28
[EXPENSE-RATIO]                                   0.34
</TABLE>