News Release

Toronto Stock Exchange Data Issue Resolved

December 12, 2012

December 12, 2012 (TORONTO) - TMX Group advises that it has resolved the datafeed issue experienced this morning with its TL1 datafeed for A-L symbols. All Toronto Stock Exchange data is now up to date and operating normally.

About TMX Group

TMX Group's key subsidiaries operate cash and derivative markets for multiple asset classes including equities, fixed income and energy. Toronto Stock Exchange, TSX Venture Exchange, TMX Select, Alpha Group, The Canadian Depository for Securities, Montreal Exchange, Canadian Derivatives Clearing Corporation, Natural Gas Exchange, Boston Options Exchange, Shorcan, Shorcan Energy Brokers, Equicom and other TMX Group companies provide listing markets, trading markets, clearing facilities, data products and other services to the global financial community. TMX Group is headquartered in Toronto and operates offices across Canada (Montreal, Calgary and Vancouver), in key U.S. markets (New York, Houston, Boston and Chicago) as well as in London, Beijing and Sydney. For more information about TMX Group, visit our website at www.tmx.com. Follow TMX Group on Twitter at http://twitter.com/tmxgroup.

For more information please contact:

Carolyn Quick
Director, Corporate Communications
416-947-4597
carolyn.quick@tmx.com