SECTION 906 CERTIFICATION

Pursuant to 18 U.S.C.ss. 1350, the undersigned officers of Federated Fixed
Income Securities, Inc. on behalf of Federated Municipal Ultrashort Fund (the
"Registrant"), hereby certify, to the best of our knowledge, that the
Registrant's Report on Form N-CSR for the period ended March 31, 2005 (the
"Report") fully complies with the requirements of Section 13(a) or 15(d), as
applicable, of the Securities and Exchange Act of 1934 and that the
information contained in the Report fairly presents, in all material
respects, the financial condition and results of operations of the Registrant.


Dated: May 25, 2005

/s/ J. Christopher Donahue

Title: President, Principal Executive Officer



Dated: May 25, 2005

/s/ Richard J. Thomas

Title: Treasurer, Principal Financial Officer

This certification is being furnished solely pursuant to 18 U.S.C.ss. 1350 and
is not being filed as part of the Report or as a separate disclosure document.