Filed by Federated Municipal Securities Fund, Inc.


Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant
to Rule 14a-12 of the Securities Act of 1943

Subject Company:  Federated Municipal Securities Income Trust
                  Commission File No. 811-6165

Please be aware that Federated Vermont Municipal Income Fund ("Federated Vermont
Fund") shareholders are being asked to approve the tax-free reorganization of
the Federated Vermont Fund into Federated Municipal Securities Fund, Inc.
("Federated Municipal Fund").  Class A Shareholders of the Federated Vermont
Fund will receive Class A Shares of the Federated Municipal Fund in the
Reorganization.   Contingent upon shareholder approval, the shareholder meeting
is scheduled for August 17, 2007.  The reorganization scheduled to occur after
the close of business on August 17th

Federated Municipal Securities Fund, Inc.("Federated") (ICA No. 811-02677),
filed a proxy statement/prospectus and other relevant documents concerning the
planned transitions with the United States Securities and Exchange Commission
(the "SEC").  INVESTORS ARE URGED TO READ THE PROXY STATEMENT/PROSPECTUS AND
OTHER DOCUMENTS FILED WITH THE SEC IN CONNECTION WITH THE PLANNED TRANSITIONS,
OR INCORPORATED BY REFERENCE INTO THE PROXY STATEMENT/PROSPECTUS, BECAUSE THEY
CONTAIN IMPORTANT INFORMATION ABOUT THE TRANSITIONS, AND RELATED MATTERS.
Investors can obtain these documents free of charge at the SEC Web site
(www.sec.gov).  In addition, documents filed with the SEC by Federated are
available free of charge at 1-800-341-7400 or FEDERATEDINVESTORS.COM.