GAIN Capital to be Added to the Russell 2000 Index

GAIN Capital (NYSE: GCAP), a global provider of online trading services, today announced that its common shares trading under the ticker “GCAP” are set for addition to the Russell 2000® Index on March 31, 2011.

"We are pleased to be added to the Russell 2000 Index following our successful IPO in December 2010," said Glenn Stevens, chief executive officer of GAIN Capital. "We believe our inclusion in the Index will help increase GAIN’s visibility in the investment community and provide us with the opportunity to expand our shareholder base."

Russell Investments will reconstitute its U.S. and global equity indexes to include recent Initial Public Offerings (IPOs) at market close on Thursday, March 31, 2011. A preliminary list of additions and deletions was provided by Russell Investments on March 15, 2011.

The Russell 2000 Index measures the performance of the small-cap segment of the U.S. equity universe. The Russell 2000 Index is a subset of the Russell 3000® Index representing approximately eight percent of the total market capitalization of that index. Membership in the Russell 2000 Index, which will remain in place for one year, means automatic inclusion in the appropriate Russell Investments growth and value style indexes.

Russell Investments determines membership for its equity indexes primarily by objective market capitalization rankings and investment style attributes. The Russell 2000 Index is constructed to provide a comprehensive and unbiased small-cap barometer and is completely reconstituted annually to ensure larger stocks do not distort the performance and characteristics of the true small-cap opportunity set.

IPOs are added to the Russell Indexes on a quarterly basis. Adding IPOs, in addition to the annual Russell Reconstitution of indexes, leads to an enhanced market representation without significant turnover.

Russell Investment indexes are widely used by investment managers and institutional investors for index funds and as benchmarks for both passive and active investment strategies. An industry leading $3.9 trillion in assets are currently benchmarked to Russell Investment indexes.

About GAIN Capital

GAIN Capital Holdings, Inc. (NYSE:GCAP - News) is a global provider of online trading services. GAIN's innovative trading technology provides market access and highly automated trade execution services across multiple asset classes, including foreign exchange (Forex Forex Foreign exchange or forex is the act of converting one nation’s currency into another nation’s currency (that possesses a different currency); for example, the converting of British Pounds into US Dollars, and vice versa. The exchange of currencies can be done over a physical counter, such as at a Bureau de Change, or over the internet via broker platforms, where currency speculation takes place, known as forex trading.The foreign exchange market, by its very nature, is the world’s largest tradi Foreign exchange or forex is the act of converting one nation’s currency into another nation’s currency (that possesses a different currency); for example, the converting of British Pounds into US Dollars, and vice versa. The exchange of currencies can be done over a physical counter, such as at a Bureau de Change, or over the internet via broker platforms, where currency speculation takes place, known as forex trading.The foreign exchange market, by its very nature, is the world’s largest tradi Read this Term or FX), contracts for difference (CFDs) and exchange-based products, to a diverse client base of retail and institutional investors.

A pioneer in online Forex Trading Forex Trading Forex trading is the buying and selling of foreign currencies with the aim of generating a profit. The value of currencies, especially floating currencies, fluctuate to varying degrees. This constant volatility of exchange rates opens the door for speculators to invest in a certain currency against another. The Forex market is the world’s biggest and most liquid market, with over $5 billion turnover every single day, with the market being open 24 hours a day, 5 days a week.It goes without saying Forex trading is the buying and selling of foreign currencies with the aim of generating a profit. The value of currencies, especially floating currencies, fluctuate to varying degrees. This constant volatility of exchange rates opens the door for speculators to invest in a certain currency against another. The Forex market is the world’s biggest and most liquid market, with over $5 billion turnover every single day, with the market being open 24 hours a day, 5 days a week.It goes without saying Read this Term, GAIN Capital operates FOREX.com®, one of the largest and best-known brands in the retail forex industry. GAIN's other businesses include GAIN GTX, a fully independent ECN for hedge funds and institutions, and GAIN Securities, Inc. (member FINRA/SIPC) a licensed U.S. broker-dealer.

With offices in New York City; Bedminster, New Jersey; London; Sydney; Hong Kong; Tokyo; and Seoul, GAIN Capital and its affiliates are regulated by the Commodity Futures Trading Commission (CFTC), the National Futures Association (NFA) and the Securities and Exchange Commission (SEC) in the United States; the Financial Services Authority (FSA) in the United Kingdom; the Financial Services Agency (FSA) in Japan; the Securities and Futures Commission (SFC) in Hong Kong; and the Australian Securities and Investments Commission (ASIC) in Australia.

For company information, visit www.gaincapital.com or www.forex.com.