TSXgroup

July 16, 2008

JULY 16 2008 (TORONTO) - TMX Group Inc. and Citi today announced an agreement to provide Toronto Stock Exchange and TSX Venture Exchange participating organizations with a smart order routing solution powered by Citi's Lava ColorBook® II technology. This smart order router will execute orders at various Canadian marketplaces seeking the best available prices.

ColorBook® II will provide customers a low-latency smart router that aggregates full depth market data feeds and provides a suite of special order types for accessing liquidity across multiple market centers.

Tom Kloet, CEO, TMX Group, said: "This agreement underpins our commitment to providing leading-edge, best execution solutions for our customers. After an exhaustive search for the right partner and right solution, we are delighted to work with Citi for the use of its innovative Lava ColorBook ® technology. We are looking forward to launching the ColorBook® II intelligent routing technology integrated with the TSX Quantum™ platform, and are confident it will provide our customers with exceptional performance and a competitive advantage in trade execution."

By integrating ColorBook® II into its service offering, TMX Group is supporting customers looking to best utilize a multiple marketplace environment while retaining a centralized price-discovery mechanism through its smart order router offering. The evolving Canadian market structure represents tremendous potential for Lava's first launch outside of the United States and for Toronto Stock Exchange and TSX Venture Exchange to support its customers in achieving their best execution needs.

Richard Evans, Head of Global Equities Electronic Execution at Citi, said: "We are confident that this first international partnership for ColorBook ® will provide TMX Group customers with superior execution and demonstrates the innovative, industrial-strength technology and trading solutions we are able to provide."

Canadian smart order routing clients will also have the opportunity to benefit from additional functionality available on ColorBook® II, including improved access to hidden liquidity, enhanced price improvement opportunities, expanded algorithmic connectivity, increased execution efficiency and minimized market impact.

This integrated platform with Canadian smart order routing functionality is expected to be introduced in the fourth quarter of 2008.

To inquire on how to connect to the TSX/ Lava Colorbook router, please contact your account rep:

Central Canada USA/ International Canada East/ Quebec Canada West

Kevin Sampson Stan Grunzeweig Stefan Frirdich Lewis Bateman

(416) 947-4718 (416) 947-4724 (416) 947-4750 (416) 947-4475

About TMX Group (TSX-X)

TMX Group owns companies that operate markets for multiple asset classes including equities, derivatives and energy products. From its home base in Canada, TMX Group reaches internationally as its equity markets list more resource companies than any other exchange group in the world. TMX Group provides trading markets, and trading and data products and services to the global financial community who access Canada's equity capital market. TMX Group's exchanges are ranked as the 7th largest exchange group in the world and in 2007, where a record 150 billion of securities volume traded. TMX Group is headquartered in Toronto and maintains offices in Montreal, Calgary and Vancouver. For more information on TMX Group, visit our website at http://www.tsx.com.

About Citi and Lava Technology

Citi, 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, securities brokerage, and wealth management. Citi's major brand names include Citibank, CitiFinancial, Primerica, Smith Barney and Banamex. Additional information may be found at www.citigroup.com or www.citi.com.

Lava Technology is part of Citi's Global Equities business and provides order- and execution management services, smart order routing and other trading technology services through a series of branded products and services.

For further information: Steve Kee, Director, Corporate Communications, TMX Group Inc., Toronto Office, (416) 947-4682, Toll Free 1-888-873-8392, Cellular (416) 358-3714, Vancouver Office (604) 602-6902, Calgary Office (403) 218-2892, steve.kee@tsx.com, Stephen Cohen, Citi, 212-816-5300, stephen1.cohen@citi.com.