Citigroup Selected by Dimensional Fund Advisors to Provide Comprehensive Portfolio of Middle-Office Operational Services Around the World

Mandate involves $100 billion in assets under management in mutual funds and separate accounts across multiple investment strategies

New York– April 25, 2006 — Global Transaction Services, a business unit of Citigroup Corporate and Investment Banking, today announced that it has been chosen to provide Dimensional Fund Advisors with a comprehensive portfolio of middle-office operational services to its offices around the world.

Dimensional Fund Advisors, an asset management and mutual fund firm with over $100 billion in assets under management, is headquartered in Santa Monica, California, with offices in Europe and Asia Pacific. Dimensional targets the returns of capital markets through investment strategies based on financial science. Its objective is to help clients structure globally diversified portfolios and to add value through state-of-the-art portfolio design and trading.

Citigroup will provide Dimensional Fund Advisors with a comprehensive range of middle-office services within its Asset Manager Solutions program. These services range from portfolio accounting, trade and cash processing, corporate action processing, broker and custodian relationship management, post-trade compliance and operational data management services.

“Citigroup’s expertise, combined with its global footprint, will allow us to focus on what we do best – manage money for our clients in the U.S. and around the world,” said David Booth, Chief Executive Officer and Chief Investment Officer, Dimensional Fund Advisors.

“We welcome the opportunity to deepen our long-standing relationship with one of the most innovative fund managers in the industry,” said Neeraj Sahai, Global Head, Securities and Fund Services, Global Transaction Services, Citigroup Corporate and Investment Banking. “Just as Dimensional has been a pioneer in science-based investing, it is also leading the marketplace in recognizing the benefits Citigroup can offer asset managers – scalable, best-of-breed solutions delivered through a world-class operations and technology platform.”

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About Dimensional Fund Advisors
Dimensional Fund Advisors offers investment solutions guided by the science of capital markets. Today the firm has more than $100 billion under management for more than 300 clients, as well as for high-net-worth investors through professional financial advisors.

About Citigroup
Citigroup (NYSE: C), the leading global financial services company, has some 200 million customer accounts and does business in more than 100 countries, providing consumers, corporations, governments and institutions with a broad range of financial products and services, including consumer banking and credit, corporate and investment banking, insurance, securities brokerage, and asset management. Major brand names under Citigroup’s trademark red umbrella include Citibank, CitiFinancial, Primerica, Smith Barney, and Banamex. Additional information may be found at www.citigroup.com.

About Citigroup Corporate and Investment Banking
Our Corporate and Investment Banking group achieves the extraordinary for our clients around the world. No financial institution is more committed to understanding and advancing the goals of its clients - our diverse and talented staff in some 100 countries advises companies, governments, and institutional investors on the best way to realize their strategic objectives. We create solutions for and provide the broadest possible capital and market access to thousands of issuer and investor clients, and no institution better executes the increasingly complex payment and cash management solutions required in today's global economy. Core business lines under Citigroup Corporate and Investment Banking include Global Capital Markets, Global Banking and Global Transaction Services.