There are risks involved with investing, including possible loss of principal. Risk controls and asset allocation models do not promise any level of performance or guarantee against loss of principal. Barclays Global Investor, N.A. ("BGINA"), a national banking association operating as a limited purpose trust company, manages the investment strategies and other fiduciary services referred to in this advertisement and provides fiduciary and trust services to various institutional investors. PensionSpan®, a service of Barclays Global Investors, N.A., is available to qualified employee benefit plans and institutional investors, eligibility requirements do apply. Strategies maintained by BGINA are not FDIC insured and not guaranteed by BGINA or its affiliates. BGINA is a majority-owned subsidiary of Barclays Bank PLC. Certain services, not limited to trustee and benefit payment services, provided by unaffiliated parties. This information is not an offer to sell, nor an invitation to apply for any particular product or service. © 2007 Barclays Global Investors, N.A.