CZA Invesco Zacks Mid Cap ETF

Claymore Securities, Inc. today announced that it has launched seven new ETFs on the American Stock Exchange (AMEX); expanding its U.S.-listed ETF family to 18 funds. Included in this most recent launch are the first growth & income index ETF, the first consensus research index ETF and the first patent-value growth index ETF: Claymore/BIR Leaders 50 ETF (AMEX:BST) The Fund seeks investment results that correspond generally to the performance, before the Fund�s fees and expenses, of an index called the BIR Leaders 50 Index. The Index is comprised of 50 stocks selected from a universe of common stocks and ADRs listed on U.S. exchanges and covered by Best Independent Research, LLC, a consortium of the following five independent research companies: Ativo Research, Channel Trend Inc., Columbine Capital Services, Ford Equity Research, and Thomas White International. Claymore/Ocean Tomo Growth Index ETF (AMEX:OTR) The Fund seeks investment results that correspond generally to the performance, before the Fund�s fees and expenses, of an equity index called the Ocean Tomo 300� Patent Growth Index. The Index is comprised of 60 stocks selected, based on investment and other criteria, from a universe of U.S. listed companies. The universe of companies includes the 300 companies that comprise the Ocean Tomo 300� Patent Index without limit on market capitalization, but which are primarily mid-to-large capitalization companies with capitalization in excess of $1 billion. The companies in the universe are selected using criteria as identified by Ocean Tomo. Claymore/Zacks Growth & Income Index ETF (AMEX:CZG) The Fund seeks investment results that correspond generally to the performance, before the Fund�s fees and expenses, of an equity index called the Zacks Growth & Income Index. The Index is comprised of 225 stocks selected, based on investment and other criteria, from a universe of the 1,500 most liquid U.S. listed equity securities. The universe of securities includes all U.S. stocks, including ADRs, listed on domestic exchanges. The securities in the universe are selected using a proprietary methodology developed by Zacks Investment Research, Inc. The methodology adjusts over time based on the assets in the portfolio to ensure investability at higher capacity levels. Additionally, Claymore announced the launch of its first four domestic style box ETFs. �Claymore is committed to building a best-in-class family of ETFs designed for advisors and their clients,� stated Christian Magoon, Senior Managing Director of Claymore. �We are excited to partner with these index providers and expand our industry-recognized innovation to traditional, style-based asset allocation.� The new style-box ETFs are: Claymore/BIR Leaders Mid-Cap Value ETF (AMEX:BMV) The Fund seeks investment results that correspond generally to the performance, before the Fund�s fees and expenses, of an index called the BIR Leaders Mid-Cap Value Index. The Index is comprised of approximately 100 stocks selected from a universe of mid-capitalization value common stocks or ADRs listed on U.S. exchanges covered by Best Independent Research, LLC, a consortium of the five following independent research companies: Ativo Research, Channel Trend Inc., Columbine Capital Services, Ford Equity Research, and Thomas White International. Claymore/BIR Leaders Small-Cap Core ETF (AMEX:BES) The Fund seeks investment results that correspond generally to the performance, before the Fund�s fees and expenses, of an index called the BIR Leaders Small-Cap Core Index. The Index is comprised of approximately 150 stocks selected from a universe of small-capitalization core common stocks or ADRs listed on U.S. exchanges covered by Best Independent Research, LLC, a consortium of the following five independent research companies: Ativo Research, Channel Trend Inc., Columbine Capital Services, Ford Equity Research, and Thomas White International. Claymore/Great Companies Large-Cap Growth Index ETF (AMEX:XGC) The Fund seeks investment results that correspond generally to the performance, before the Fund�s fees and expenses, of an equity index called the Great Companies Large-Cap Growth Index. The Large-Cap Index is composed of between 35 and 50 securities. The companies included in the Index universe are selected using a quantitative methodology developed by Great Companies, Inc. that is based on earnings growth, market price relative to True Worth� (a proprietary valuation metric of Great Companies that measures implied cash flow returns relative to a stock�s current multiple as well as comparable common stocks at competitive firms), and the traits of �great companies� as detailed in the book Great Companies, Great Returns, by Jim Huguet, published by Random House (1999). Claymore/Zacks Mid-Cap Core ETF (AMEX:CZA) The Fund seeks investment results that correspond generally to the performance, before the Fund�s fees and expenses, of an index called the Zacks Mid-Cap Core Index. The Index is comprised of 100 stocks selected, based on investment and other criteria, from a universe of mid-capitalization universe which ranges from approximately $2 billion in market capitalization to $10 billion in market capitalization as defined by Zacks. The securities in the universe are selected using a proprietary strategy developed by Zacks. Claymore Securities, Inc. is a privately-held financial services company offering unique investment solutions for financial advisors and their valued clients. As of February 28, 2007, Claymore entities have provided supervision, management, servicing or distribution on approximately $16 billion in assets through closed-end funds, unit investment trusts, mutual funds, separately managed accounts and exchange-traded funds. Claymore Advisors, LLC, an affiliate of Claymore Securities, serves as investment adviser to the funds. Best Independent Research, LLC. is an exclusive consortium of independent research companies. The members were chosen after a careful screening of all industry participants for professional credentials, research philosophy, process consistency and, most importantly, documented buy/hold/sell performance. In the end, only five were selected: Ativo Research, Channel Trend, Columbine Capital Services, Ford Equity Research, and Thomas White International. Great Companies, Inc. is a privately-owned registered investment advisor located in Tampa, FL. Great Companies, Inc. is a fundamental, research-driven portfolio manager that believes in the long-term ownership of �great companies� purchased at reasonable prices. This strategy has been embraced since the firm�s founding in 1993, and is implemented by a team of investment professionals who have over 100 years of combined investment experience. Great Companies, Inc. manages assets for both individuals and institutions and creates indices based upon their unique investment strategy. Ocean Tomo, LLC is a fully-integrated intellectual capital merchant bank that specializes in understanding and leveraging intellectual property assets. The company provides advice in intellectual property-related expert services, valuation, investments, risk management and corporate finance. Zacks Investment Research, Inc. (�Zacks�) is a Chicago-based firm with over 25 years of experience in providing institutional and individual investors with the analytical tools and financial information necessary to the success of their investment process. Zacks receives daily electronic data feeds and printed research reports on over 10,000 companies from over 200 brokerage firms, produced by more than 3,500 analysts, amounting to over 500,000 pages of brokerage research. In addition, Zacks records 25,000 earnings estimate revisions and changes in broker recommendations weekly. Important Risks and Other Considerations This information does not represent an offer to sell securities of funds and it is not soliciting an offer to buy securities of the funds. There can be no assurance that the funds will achieve their investment objectives. An investment in the various Claymore ETFs is subject to certain risks and other considerations. Such risks and considerations include, but are not limited to: Investment Risk (All): An investment in the funds is subject to investment risk, including the possible loss of the entire principal amount that you invest. Equity Risk (All): The risk that the value of the securities held by the funds will fall due to general market and economic conditions, perceptions regarding the industries in which the issuers of securities held by the Fund participate, or factors relating to specific companies in which the funds invests. Foreign Investment Risk (All): The fund's investments in non-U.S. issuers may involve unique risks compared to investing in securities of U.S. issuers, including, among others, greater market volatility than U.S. securities and less complete financial information than for U.S. issuers. The fund's investments in foreign securities may involve higher costs than investments in U.S. securities, including higher transaction and custody costs as well as the imposition of additional taxes by foreign governments. The fund's foreign investments may also involve risks associated with the level of currency exchange rates, less complete financial information about the issuers, less market liquidity, more market volatility and political instability. Future political and economic developments, the possible imposition of withholding taxes on dividend income, the possible seizure or nationalization of foreign holdings, the possible establishment of exchange controls or freezes on the convertibility of currency, or the adoption of other governmental restrictions might adversely affect the fund's investments in foreign securities. Additionally, foreign issuers may be subject to less stringent regulation, and to different accounting, auditing and recordkeeping requirements. In addition, the underlying issuers of certain depositary receipts, particularly unsponsored or unregistered depositary receipts, are under no obligation to distribute shareholder communications to the holders of such receipts, or to pass through to them any voting rights with respect to the deposited securities. Non-Correlation Risk (All): The fund's return may not match the return of the Index for a number of reasons. For example, the Fund incurs a number of operating expenses not applicable to the Index, and incurs costs in buying and selling securities, especially when rebalancing the fund�s securities holdings to reflect changes in the composition of the Index. Small and Medium-Sized Company Risk (BST, CZG): Investing in securities of small and medium-sized companies involves greater risk than is customarily associated with investing in more established companies. These companies' stocks may be more volatile and less liquid than those of more established companies. These stocks may have returns that vary, sometimes significantly, from the overall stock market. Replication Management Index (All): Unlike many investment companies, the funds are not "actively" managed. Therefore, it would not necessarily sell a stock because the stock's issuer was in financial trouble unless that stock is removed from the Index. Issuer-Specific Changes (All): The value of an individual security or particular type of security can be more volatile than the market as a whole and can perform differently from the value of the market as a whole. The value of securities of smaller issuers can be more volatile than that of larger issuers. Non-Diversified Fund Risk (All):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. Patent Risk (OTR): The companies in which the Claymore/Ocean Tomo Growth ETF invests (via the Index) can be significantly affected by patent considerations, including the termination of their patent protection for their products. Small Company Risk (BES): Investing in securities of small companies involves greater risk than is customarily associated with investing in more established companies. These companies� stocks may be more volatile and less liquid than those of more established companies. These stocks may have returns that vary, sometimes significantly, from the overall stock market. Medium Sized Company Risk (BMV, OTR, CZA): Investing in securities of medium sized companies involves greater risk than is customarily associated with investing in more established companies. These companies� stocks may be more volatile and less liquid than those of more established companies. These stocks may have returns that vary, sometimes significantly, from the overall stock market. Neither Zacks Independent Research, Inc.; Best Independent Research, LLC; Great Companies, LLC; Ocean Tomo, Inc. (each an �Index Provider�) makes any warranty, either expressed or implied, as to results to be obtained by Claymore Advisors, LLC, owners of the product, or any other person or entity from the use of its Index or any data included therein in connection with the rights licensed hereunder or for any other use. No Index Provider makes no express or implied warranties, and hereby expressly disclaims all warranties of merchantability or fitness for a particular purpose or use with respect to the index or any data included therein. Without limiting any of the foregoing, in no event shall any Index Provider have any liability for any special, punitive, indirect, or consequential (including lost profits), even if notified of the possibility of such damages. Each Index Provider determines, composes and calculates the index without regard for the product. The product itself is not sponsored, endorsed, sold or promoted by any Index Provider. The Index Providers have no obligation or liability regarding the administration, marketing or trading of the product, and makes no representation or warranty to the owners of the product or to any member of the public, regarding investing in securities generally or in the product particularly. Investors buying or selling ETF shares on the secondary market may incur brokerage costs and other transactional fees. Shares of ETFs may fluctuate in price due to daily changes in trading volume. At times, shares may not have a high volume of trading. Except when aggregated in creation units, shares are not redeemable securities of the Fund. The Funds issue and redeem shares at NAV only in large blocks of 50,000 shares (each block of 50,000 shares is called a �creation unit�) or multiples thereof. Only broker-dealers or large institutional investors with creation and redemption agreements, called authorized participants (�APs�), can purchase or redeem these Creation Units. Investors should consider the investment objectives and policies, risk considerations, charges and ongoing expenses of the ETFs carefully before they invest. The prospectus contains this and other information relevant to an investment in the ETFs. Please read the prospectus carefully before you invest or send money. For this and more information, please contact a securities representative or Claymore Securities, Inc., 2455 Corporate West Drive, Lisle, Illinois 60532, 800-345-7999 or www.claymore.com/etfs. NOT FDIC-INSURED � NOT BANK-GUARANTEED � MAY LOSE VALUE Claymore Securities, Inc. � 2455 Corporate West Drive � Lisle, Illinois 60532 1-800-345-7999 � www.claymore.com Member NASD/SIPC 04/07