Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned, Kevin Rich, Chief Executive Officer and Principal Financial Officer of DB Commodity Services LLC, the Managing Owner of PowerShares DB US Dollar Index Bullish Fund (the “Fund”), a series of PowerShares DB US Dollar Index Trust, hereby certifies pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Fund’s Quarterly Report on Form 10-Q for the period ended March 31, 2007, as filed with the Securities and Exchange Commission on the date hereof (the “Quarterly Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

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

/s/ Kevin Rich

Kevin Rich

Chief Executive Officer and Principal Financial Officer

May 15, 2007

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