GAIN Capital Continues Asian Expansion with New Office in Hong Kong

Company Also Enters Into White Label Partnership with Polaris Securities (HK) Limited, A Subsidiary of One of Taiwan's Largest Securities Firms

NEW YORK, LONDON and HONG KONG, February 2 - GAIN Capital Holdings Inc., a global provider of online trading services,
announced today the opening of its newest office in Hong Kong, further
extending its presence in the Asia-Pacific region alongside offices in Tokyo
and Seoul. The company received regulatory approval from the Hong Kong
Securities and Futures Commission (SFC) in 2009.

"Hong Kong is a key global financial center in Asia with a robust
regulatory framework," said Glenn Stevens, CEO, GAIN Capital. "Our Hong Kong
office will act as a regional business development hub and help us reach and
address the needs of our clients and partners locally."

GAIN's office, located in the central business district, is being managed
by Brian Tsui. Mr. Tsui was formerly the head of retail FX at MF Global Hong
Kong.

The company also announced it has signed a white label agreement with
Polaris Securities (Hong Kong) Ltd ("Polaris (HK)"), a wholly owned
subsidiary of Polaris Securities Co., Ltd. A leader in online trading and
financial innovation, Polaris Securities is one of the top securities firms
and the largest market-maker of index futures and options in Taiwan. The new
partnership with GAIN enables Polaris (HK) to expand its Leveraged Foreign
Exchange business.

"By partnering with GAIN Capital, we were able to come to market much
faster with an offering that speaks to the particular needs of our
sophisticated clients, who demand best of breed online trading tools,"
commented James Hsu, managing director, Foreign Exchange Division, Polaris
(HK). "GAIN brought to the partnership a fully localized Chinese trading
platform, technical resources and a local support team that enabled us to
quickly customize and deploy the Polaris (HK) offering according to our
specific business and regulatory requirements. We are now accepting clients
at www.polaris.com.hk."

About GAIN Capital

GAIN Capital Holdings, Inc. is a global provider of online trading
services, specializing in foreign exchange (forex or FX) and contracts for
difference (CFDs). Customers and trading partners in more than 140 countries
have utilized the company's award-winning trading platform which transacts
nearly US$200 billion per month.

A pioneer in online forex trading, GAIN Capital operates FOREX.com
(www.forex.com), one of the largest and best-known brands in the
retail forex industry. It also provides execution, clearing, custody and
technology products and services to an institutional client base including
asset managers, broker/dealers and other financial services firms.

With offices in New York City; Bedminster, New Jersey; London; Seoul;
Tokyo; and Hong Kong, GAIN Capital and its affiliates are regulated by the
Commodity Futures Trading Commission (CFTC) in the United States, the
Financial Services Authority (FSA) in the United Kingdom, the Financial
Services Authority (FSA) in Japan, and the Securities and Futures Commission
(SFC) in Hong Kong.

GAIN's investor group includes private equity firms 3i, VantagePoint
Venture Partners, Tudor Ventures, Edison Venture Fund and Cross Atlantic
Capital Partners. For company information, visit www.gaincapital.com
or www.forex.com.

In North America: Steph Johnson, Feintuch Communications, +1-212-808-4904, gain at feintuchpr.com; Christa Conte, Feintuch Communications, +1-212-808-4902, gain at feintuchpr.com; In Europe: Sorrel Beynon, Edelman, +44(0)20-3047-2368, gain at edelman.com; Rachel Cohen, Edelman, +44(0)20-3047-2366, gain at edelman.com; Investor Contact: Miri Segal-Scharia, MS-IR LLC, IR at gaincapital.com, +1-917-607-8654