SUPPLEMENT TO THE CLASS A PROSPECTUS AND STATEMENT OF ADDITIONAL INFORMATION

                        CREDIT SUISSE MUNICIPAL BOND FUND

     THE FOLLOWING INFORMATION SUPERSEDES CERTAIN INFORMATION IN THE FUND'S
CLASS A PROSPECTUS AND STATEMENT OF ADDITIONAL INFORMATION.

Gregg M. Diliberto now serves as the Portfolio Manager of the fund. Patrick A.
Bittner no longer serves as Co-Portfolio Manager of the fund.

Dated: April 16, 2002                                              CSMBA-16-0402