Filed Pursuant to Rule 497
                                                Registration File No.: 2-82510


- --------------------------------------------------------------------------------
                                                               February 11, 2003
                                                                      Supplement
[MORGAN STANLEY LOGO]
- --------------------------------------------------------------------------------



                      SUPPLEMENT DATED FEBRUARY 11, 2003

                  TO THE STATEMENT OF ADDITIONAL INFORMATION OF
                    MORGAN STANLEY VARIABLE INVESTMENT SERIES

                               Dated May 1, 2002



The sixth paragraph of the section of the Statement of Additional Information
titled "XI. CALCULATION OF PERFORMANCE DATA" is hereby replaced by the
following:

     From time to time the Fund may quote the "yield" of each of the Limited
     Duration Portfolio, the Quality Income Plus Portfolio, the High Yield
     Portfolio and the Utilities Portfolio in advertising and sales literature.
     Yield is calculated for any 30-day period as follows: the amount of
     interest and/or dividend income for each security in the Portfolio is
     determined in accordance with regulatory requirements; the total for the
     entire portfolio constitutes the Portfolio's gross income for the period.
     Expenses accrued during the period are subtracted to arrive at "net
     investment income." The resulting amount is divided by the product of the
     net asset value per share on the last day of the period multiplied by the
     average number of Portfolio shares outstanding during the period that were
     entitled to dividends. This amount is added to 1 and raised to the sixth
     power. 1 is then subtracted from the result and the difference is
     multiplied by 2 to arrive at the annualized yield. The "yield" of a
     Portfolio does not reflect the deduction of any charges which may be
     imposed on the Contracts by the applicable Account which, if quoted, would
     reduce the yield quoted. For the 30-day period ended December 31, 2001,
     the yield of the Limited Duration Portfolio, calculated pursuant to this
     formula, was 2.70% for Class X shares and 2.46% for Class Y shares, the
     yield of the Quality Income Plus Portfolio, calculated pursuant to this
     formula, was 5.50% for Class X shares and 5.25% for Class Y shares, the
     yield of the High Yield Portfolio, calculated pursuant to this formula,
     was 6.39% for Class X shares and 6.22% for Class Y shares, and the yield
     of the Utilities Portfolio, calculated pursuant to this formula, was 2.41%
     for Class X shares and 2.16% for Class Y shares.