Invesco PowerShares to List Global Biotech ETF on Nasdaq

Market Wire, September, 2008

Invesco PowerShares Capital Management LLC, a leading provider of exchange-traded funds (ETFs), announced today the anticipated listing of the PowerShares Global Biotech Portfolio Sept. 18, 2008, on the Nasdaq Stock Market.

-- PBTQ - PowerShares Global Biotech Portfolio

"We believe the PowerShares Global Biotech Portfolio will provide investors transparent, tax-efficient access to the largest and most advanced biotechnology companies in the world using the benefit-rich ETF structure," said Bruce Bond, president and CEO of Invesco PowerShares. "PBTQ should be a great addition to our growing suite of global ETF portfolios."

The PowerShares Global Biotech Portfolio (PBTQ) is based on the NASDAQ OMX Global Biotech Index(SM). The Index is designed to measure the overall performance of globally traded securities of the largest and most liquid companies involved in the biotechnology industry. The Index is rebalanced quarterly using a modified market capitalization-weighting methodology.

Index Company Weightings as of 6/30/2008

PowerShares Global Biotech
Portfolio (PBTQ)

                            Index
Company                    Weight(%)
-------                    --------
Amgen Inc.                   8.00
Gilead Sciences Inc.         8.00
GenenTech                    8.00
Celgene Corp.                8.00
Genzyme Corp.                8.00
CSL Ltd.                     4.00
Biogen Idec Inc.             4.00
Actelion Ltd.                4.00
Vertex Pharmaceuticals Inc.  4.00
Cephalon Inc.                3.87

Source: The NASDAQ OMX Group, Inc., based on hypothetical Index information as of June 30, 2008. The Index was not yet operational as of June 30, 2008. Allocations represent the percentages that would have been utilized if the Index had been operational. Data is subject to change. Index values do not represent Fund values. Past performance is no guarantee of future results. An investor cannot invest directly in an index.

Invesco PowerShares currently offers 127 portfolios, one of the largest, most diverse families of ETFs available to U.S. investors today.

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 approximately $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 .

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 and covered call options, as well as those risks related to short selling and margin maintenance. Ordinary brokerage commissions apply.

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

Small- and Medium-Sized Company Risk Information

An investment in securities of small and medium-sized companies involves greater risk than is customarily associated with investing in more established, larger sized companies.

Foreign Risk Information

An investment in the securities of non-U.S. issuers involves risks beyond those associated with investments in U.S. securities, including, but not limited to: greater market volatility, the availability of less reliable financial information, higher transactional and custody costs, taxation by foreign governments, decreased market liquidity, political instability, negative impact of changes in currency exchange rates or foreign governmental regulation, currency risk, fluctuation due to changes in interest rates, effects of monetary policies issued by the United States, foreign governments, central banks or supranational entities and currency controls or other national or global political economic developments, among others.

Non-Diversified Fund Risk Information

The Fund is considered non-diversified and can invest a greater portion of assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single investment could cause greater fluctuations in share price than would occur in a diversified fund.

Industry and Sector Risk

When a Fund is focused in a specific industry or sector, it presents greater risks than if it were broadly diversified over numerous industries and sectors of the economy. There are additional risks associated with investing in companies involved in the biotechnology industry. Please read the prospectus for a summary of these risks pertaining to each industry or sector.