FORM OF

POWERSHARES DB US DOLLAR INDEX TRUST

PARTICIPANT AGREEMENT

This Participant Agreement (the Agreement), dated as of              20    , is entered into by and among              (the Authorized Participant), PowerShares DB US Dollar Index Trust, a Delaware statutory trust (the Trust) with respect to each of PowerShares DB US Dollar Index Bullish Fund and PowerShares DB US Dollar Index Bearish Fund, each as a separate series of the Trust (each, a Fund and collectively, the Funds), and DB Commodity Services LLC, a Delaware limited liability company, as managing owner of the Trust and the Funds (the Managing Owner).

SUMMARY

As provided in the Amended and Restated Declaration of Trust and Trust Agreement of the Trust (the Trust Agreement) as currently in effect and described in the Prospectus (defined below), units of fractional undivided beneficial interest in and ownership of each Fund (individually and collectively, the Shares) may be created or redeemed by the Managing Owner for an Authorized Participant in aggregations of two hundred thousand (200,000) Shares (each aggregation, a Basket). Baskets are offered only pursuant to the registration statement of the Trust on Form S-1, as amended (Registration Nos.: 333-136574 and 333-136574-01), as declared effective by the Securities and Exchange Commission (SEC) and as the same may be amended from time to time thereafter or any successor registration statement in respect of Shares of each Fund (collectively, the Registration Statement) together with the prospectus of the Trust in the form filed with the SEC under Rule 424(b) after the effectiveness of the Registration Statement (the Prospectus). Under the Trust Agreement, the Managing Owner is authorized to issue Baskets to, and redeem Baskets from, Authorized Participants, only through the facilities of The Depository Trust Company (DTC or the Depository), or a successor depository, and only in exchange for cash. This Agreement sets forth the specific procedures by which an Authorized Participant may create or redeem Baskets.

Because new Shares for each Fund can be created and issued by the Trust on an ongoing basis, at any point during the life of each respective Fund, a distribution, as such term is used in the Securities Act of 1933, as amended (1933 Act), may be occurring. The Authorized Participant is cautioned that some of its activities may result in its being deemed a participant in a distribution in a manner which would render it a statutory underwriter and subject it to the prospectus delivery and liability provisions of the 1933 Act. The Authorized Participant should review the Plan of Distribution section of the Prospectus and consult with its own counsel in connection with entering into this Agreement and submitting a Purchase Order Subscription Agreement (defined below).

Capitalized terms used but not defined in this Agreement shall have the meanings assigned to such terms in the Trust Agreement. To the extent there is a conflict between any provision of this Agreement and the provisions of the Trust Agreement, the provisions of the Trust Agreement shall control.

To give effect to the foregoing premises and in consideration of the mutual covenants and agreements set forth below, the parties hereto agree as follows:

Section 1. Order Placement. To place orders for the Managing Owner to create or redeem one or more Baskets, Authorized Participants must follow the procedures for creation and redemption referred to in Section 3 of this Agreement and the procedures described in Attachment A hereto (the Procedures), as each may be amended, modified or supplemented from time to time.

Section 2. Status of Authorized Participant. The Authorized Participant represents and warrants and covenants the following:

(a) The Authorized Participant is a participant of DTC (as such a participant, a DTC Participant). If the Authorized Participant ceases to be a DTC Participant, the Authorized Participant shall give immediate notice to the Managing Owner of such event, and this Agreement shall terminate immediately as of the date the Authorized Participant ceased to be a DTC Participant.

(b) Unless Section 2(c) applies, the Authorized Participant either (i) is registered as a broker-dealer under the Securities Exchange Act of 1934, as amended (1934 Act), and is a member in good standing of the National Association of Securities Dealers, Inc. (the NASD), or (ii) is exempt from being, or otherwise is not required to be, licensed as a broker-dealer or a member of the NASD, and in either case is qualified to act as a broker or dealer in the states or other jurisdictions where the nature of its business so requires. The Authorized Participant will maintain any such registrations, qualifications and membership in good standing and in full force and effect throughout the term of this Agreement. The Authorized Participant will comply with all applicable federal laws, including without limitation, the delivery requirements of Section 5 of the 1933 Act and all applicable rules of the SEC, the laws of the states or other jurisdictions concerned, and the rules and regulations promulgated thereunder, and with the Constitution, By-Laws and Conduct Rules of the NASD (if it is a NASD member), and will not offer or sell Shares in any state or jurisdiction where they may not lawfully be offered and/or sold.

(c) If the Authorized Participant is offering or selling Shares in jurisdictions outside the several states, territories and possessions of the United States and is not otherwise required to be registered, qualified or a member of the NASD as set forth in Section 2(b) above, the Authorized Participant will (i) observe the applicable laws of the jurisdiction in which such offer and/or sale is made, (ii) comply with the full disclosure requirements of the 1933 Act, and the regulations promulgated thereunder, and (iii) conduct its business in accordance with the spirit of the NASD Conduct Rules.

(d) The Authorized Participant is in compliance with the money laundering and related provisions of the Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism Act of 2001 (the USA PATRIOT Act), and the regulations promulgated thereunder, if the Authorized Participant is subject to the requirements of the USA PATRIOT Act.

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