EXHIBIT 99.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION
                     906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the quarterly report of Flagstar Bancorp, Inc. (the
"Company") on Form 10-Q for the period ended March 31, 2003 as filed with the
Securities and Exchange Commission on the date hereof (the "Report"), I, Mark T.
Hammond, President and Chief Executive Officer of the Company, certify, to the
best of my knowledge, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002, that:

         (1)      The Report fully complies with the requirements of Section
                  13(a) or 15(d) of the Securities Exchange Act of 1934; and

         (2)      The information contained in the Report fairly presents, in
                  all material respects, the financial condition and results of
                  operations of the Company.



Dated:  May 9, 2003                         by:      /s/ Mark T. Hammond
                                                     -------------------

                                                     Mark T. Hammond
                                                     President and
                                                     Chief Executive Officer



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