PPA Invesco Aerospace & Defense ETF

Invesco PowerShares Capital Management LLC, a leading provider of exchange-traded funds (ETFs), announced today that the trailing three-year performance of its Dynamic Large Cap Value Portfolio (PWV) and Dynamic Mid Cap Growth Portfolio (PWJ) have outperformed their index peers and earned five-star ratings from Morningstar.*

"Our proud celebration of these funds' three-year anniversary is improved as we recognize their compelling performance and five-star ratings from Morningstar," said Bruce Bond, president and CEO of Invesco PowerShares. "Both PWV and PWJ are based on quantitative, rules-based Intellidexes designed to maximize the potential for outperformance. Invesco PowerShares is committed to delivering value and market-leading ideas to investors, as we seek to enhance their portfolios with our pioneering family of ETFs."

Invesco PowerShares is a chief participant in the evolution of the ETF industry -- helping move the industry beyond traditional benchmarking -- and toward intelligent indexing. The Invesco PowerShares family of intelligent ETFs currently includes 43 Dynamic Intellidex-based portfolios that seek to evaluate securities for their investment merit.

During the three-year period ended June 30, 2008:

PowerShares Dynamic Large Cap Value Portfolio (AMEX: PWV) had an annualized return of 7.65% and cumulative return of 24.75%, outperforming the S&P 500� Index with an annualized return of -13.11% and cumulative return of 13.79%. For the three-year period ended June 30, 2008, the PowerShares Dynamic Large Cap Value Portfolio earned a Morningstar Rating(TM) of five stars when compared to the 1,183 U.S.-domiciled large value funds.*

PowerShares Dynamic Mid Cap Growth Portfolio (AMEX: PWJ) had an annualized return of 12.58% and cumulative return of 42.69%, outperforming the S&P 500 Index with an annualized return of -13.11% and cumulative return of 13.79%. For the three-year period ending June 30, 2008, the PowerShares Dynamic Mid Cap Growth Portfolio earned a Morningstar Rating(TM) of five stars when compared to the 813 U.S.-domiciled mid-cap growth funds.

Ratings are based on a risk-adjusted return measure that accounts for variation in a fund's monthly performance (including the effect of sales charges, loads and redemption fees), placing more emphasis on downward variations and rewarding consistent performance. The overall rating is derived from a weighted average of three-, five- and 10-year rating metrics, as applicable.

Standardized Performance
3/03/2005 - 6/30/2008

PowerShares Dynamic Large Cap Value    1 Year     3 Year   Inception
------------------------------------   --------   -------  ---------
PWV - NAV                                -11.95%     7.65%      7.29%
PWV - Share Price                        -12.38%     7.60%      7.23%
S&P 500 Index                            -13.11%     4.40%      3.82%
Russell 1000 Value                       -18.78%     3.53%      3.25%



PowerShares Dynamic Mid Cap Growth     1 Year     3 Year   Inception
------------------------------------   --------   -------  ---------
PWJ - NAV                                 -1.92%    12.58%     12.09%
PWJ - Share Price                         -2.01%    12.57%     12.02%
S&P 500 Index                            -13.11%     4.40%      3.82%
Russell Midcap Growth                     -6.42%     8.19%      7.96%

The PowerShares Dynamic Large Cap Value Portfolio (PWV) is based on the Dynamic Large Cap Value Intellidex, which seeks to provide capital appreciation while maintaining consistent and accurate style exposure. The Style Intellidexes apply a rigorous 10-factor, style-isolation process to objectively segregate companies into their appropriate investment style and size universe. Next, each company is thoroughly evaluated to determine its investment merit by analyzing numerous unique financial characteristics from four broad financial perspectives: fundamental, valuation, timeliness and risk.

The PowerShares Dynamic Mid Cap Growth Portfolio (PWJ) is based on the Dynamic Mid Cap Growth Intellidex, which seeks to provide capital appreciation while maintaining consistent and accurate style exposure. The Style Intellidexes apply a rigorous 10-factor, style-isolation process to objectively segregate companies into their appropriate investment style and size universe. Next, each company is thoroughly evaluated to determine its investment merit by analyzing numerous unique financial characteristics from four broad financial perspectives: fundamental, valuation, timeliness and risk.

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 value of the stocks in the Index is likely to be more volatile than stocks of other issues. Investors in the Fund should anticipate that the value of their Shares will increase or decrease in value more or less in correlation with increases or decreases in the value of the Intellidex.

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 $14 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.

*�2008 Morningstar Inc. All rights reserved. The information contained herein is proprietary to Morningstar and/or its content providers. It may not be copied or distributed and is not warranted to be accurate, complete or timely. Neither Morningstar nor its content providers are responsible for any damages or losses arising from any use of this information. Past performance does not guarantee future results. The PowerShares Dynamic Large Cap Value Fund received five stars for three years. The fund was rated among 1,183 U.S.-domiciled large value funds over three years. The PowerShares Dynamic Mid Cap Growth Fund received five stars for three years. The fund was rated among 813 U.S.-domiciled mid-cap growth funds over three years. Ratings are as of June 30, 2008, and are subject to change every month. Had fees not been waived and/or expenses reimbursed in the past, the Morningstar rating may have been lower. A fund is eligible for a Morningstar Rating three years after inception. The top 10% of funds in a category receive five stars, the next 22.5% four stars, the next 35% three stars, the next 22.5% two stars and the bottom 10% one star. (Each share class is counted as a fraction of one fund within this scale and rated separately, which may cause slight variations in the distribution percentages.) Ratings for other share classes may differ due to different performance characteristics.

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.

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

Shares are not individually redeemable and owners of the shares may acquire those shares from the Fund and tender those shares for redemption to the Fund in Creation Unit aggregations only, typically consisting of 100,000 shares.

PowerShares� is a registered trademark of Invesco PowerShares Capital Management LLC. The IntellidexTM Indexes are trademarks of the American Stock Exchange LLC ("Amex") which are licensed for use by Invesco PowerShares Capital Management LLC in connection with the PowerShares Intellidex Investment Products. The Products are not sponsored or endorsed by the Amex, and the Amex makes no warranty or representation as to the accuracy and/or completeness of the Indexes or results to be obtained by any person from use of the Indexes or the trading of the Products.

Invesco Aim Distributors, Inc. is the distributor of the PowerShares Exchange-Traded Fund Trust.

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

An investor should consider the Funds' investment objectives, 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 or visit our website www.invescopowershares.com. 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