DBB Invesco DB Base Metals Fund

Invesco PowerShares Capital Management LLC, a leading provider of exchange-traded funds (ETFs), announced today that the PowerShares NextQ Portfolio (PNXQ) has changed its name to the PowerShares NQX Portfolio. The PowerShares NQX Portfolio will continue to be offered on the Nasdaq Stock Market under the existing ticker symbol (PNXQ). The investment objectives and fee structure will remain unchanged.

Known as "the PNXQ" to many market participants, "this name change highlights the ticker symbol identification and will allow for synergies in positioning the fund as a complement to the PowerShares QQQ (ticker: QQQQ), which is based on the Nasdaq-100 Index," said Bruce Bond, President and CEO of Invesco PowerShares Capital Management LLC.

The PowerShares NASDAQ NextQ Portfolio (PNXQ), launched in April 2008 on the Nasdaq Stock Market, is based on the NASDAQ Q-50 Index(SM). The Index is designed to track the performance of the 50 securities that are next in line to replace the securities currently included in the NASDAQ-100 Index�. The index reflects companies across major, non-financial industry groups including computer hardware and software, telecommunications, retail/wholesale trade and biotechnology, and is adjusted quarterly.

Invesco PowerShares is leading the intelligent ETF revolution through its family of more than 100 domestic and international index-based and actively managed exchange-traded funds. With assets under management as of June 30, 2008, of $13.95 billion, PowerShares ETFs trade on all of the major U.S. stock exchanges that trade ETFs. For more information, please visit us at www.invescopowershares.com.

Invesco PowerShares is a part of Invesco Ltd., a leading independent global investment management company dedicated to helping people worldwide build their financial security. By delivering the combined power of its distinctive worldwide investment management capabilities, including AIM, Atlantic Trust, Invesco, Perpetual, PowerShares, Trimark, and WL Ross, Invesco provides a comprehensive array of enduring investment solutions for retail, institutional and high-net-worth clients around the world. Operating in 20 countries, the company is currently listed on the New York Stock Exchange under the symbol IVZ. Additional information is available at www.invesco.com.

Important Risk Information

There are risks involved with investing in ETFs including possible loss of money. Shares are not actively managed and are subject to risk similar to stocks, including those related to short selling and margin maintenance. Ordinary brokerage commissions apply.

Shares are subject to risks including: Small and Medium-Sized Company Risk - Investing in securities of small and medium-sized companies involves greater risk than is customarily associated with investing in more established companies.

The Fund's potential investment in non-U.S. issuers, although limited to ADRs, may involve unique risks compared to investing in securities of U.S. issuers. Additionally, the Fund's potential investment in securities of real estate companies involves risks. Please see the prospectus for more complete risk information.

Shares are not FDIC insured, may lose value and have no bank guarantee.

The PowerShares NASDAQ NextQ Portfolio is not sponsored, endorsed, sold or promoted by The Nasdaq Stock Market, Inc. or its affiliates (Nasdaq, with its affiliates, are referred to as the "Corporations"). The Corporations have not passed on the legality or suitability of, or the accuracy or adequacy of, descriptions and disclosures relating to the PowerShares NASDAQ NextQ Portfolio. The Corporations make no representation or warranty, express or implied, to the owners of the PowerShares NASDAQ NextQ Portfolio or any member of the public regarding the advisability of investing in securities generally or in the PowerShares NASDAQ NextQ Portfolio particularly, or the ability of the NASDAQ Q-50 Index(SM) to track general stock market performance. The Corporations' only relationship to the Adviser is in the licensing of the NASDAQ� and NASDAQ Q-50 Index(SM) trade/service marks and certain trade names of the Corporations, and the use of the NASDAQ Q-50 Index(SM), which is determined, composed and calculated by Nasdaq without regard to the Adviser or the PowerShares NASDAQ NextQ Portfolio.

The sponsor of the Nasdaq-100 Trust(SM), a unit investment trust, is Invesco PowerShares Capital Management LLC ("Invesco PowerShares"). NASDAQ, NASDAQ-100 Index, NASDAQ-100 Index Tracking Stock and QQQ are trade/service marks of The Nasdaq Stock Market, Inc. and have been licensed for use by Invesco PowerShares Capital Management LLC, QQQ's sponsor. NASDAQ makes no representation regarding the advisability of investing in QQQ and makes no warranty and bears no liability with respect to QQQ, the NASDAQ-100 Index, its use or any data included therein.

Invesco Aim Distributors, Inc. is the distributor of the PowerShares Exchange-Traded Fund Trust. ALPS Distributors, Inc. is distributor for QQQ. The PowerShares QQQ is a Unit Investment Trust (UIT)

Invesco PowerShares Capital Management LLC is not affiliated with ALPS Distributors, Inc.

Invesco PowerShares Capital Management LLC and Invesco Aim Distributors, Inc. are indirect, wholly owned subsidiaries of Invesco Ltd.

Shares are not FDIC insured, may lose value and have no bank guarantee. Shares may be sold throughout the day on the exchange through any brokerage account. Shares may only be redeemed directly from the Portfolio by Authorized Participants in large blocks typically consisting of 100,000 Shares.

An investor should consider the Funds' investment objective, risks, charges and expenses carefully before investing. For a copy of the prospectus, which contains this and other information about the Funds, call 800.983.0903. Please read the prospectus carefully before investing.

Media Contacts: Kristin Sadlon Porter Novelli 212-601-8192 Email Contact Bill Conboy BC Capital Partners 303-415-2290 Email Contact