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,  2004 (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 24, 2004

/s/ J. Christopher Donahue

Title: President, Principal Executive Officer



Dated: May 24, 2004

/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.