EXHIBIT (b)

                    CERTIFICATION OF CEO AND CFO 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 Report on Form N-CSR of MBIA Capital/Claymore Managed
Duration Investment Grade Municipal Fund (the "Company") for the period ended
January 31, 2008 (the "Report"), Nicholas Dalmaso, as Chief Legal and Executive
Officer of the Company, and Steven M. Hill, as Treasurer and Chief Financial
Officer of the Company, each hereby certifies, pursuant to 18 U.S.C. Section
1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002,
that, to the best of his knowledge:

(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: April 4, 2008
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       /s/ Nicholas Dalmaso
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Name:      Nicholas Dalmaso
Title:     Chief Legal and Executive Officer

       /s/ Steven M. Hill
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Name:      Steven M. Hill
Title:     Treasurer and Chief Financial Officer