December 17, 2008 (TORONTO) – Toronto Stock Exchange and TSX Venture Exchange will not resume trading today due to continuing technical issues with its data feeds.

The market will be put into a Pre-Open state from 3:00PM to 5:00PM to allow participants the option of cancelling, adding or changing orders.

The company intends to open the exchanges tomorrow morning.

Additional information on the nature of the problem will be provided when the investigation is complete.

About TMX Group (TSX-X)

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, Montreal Exchange, Natural Gas Exchange, Boston Options Exchange (BOX), Shorcan, Equicom and other TMX Group companies provide trading markets, clearing facilities, data products and other services to the global financial community. TMX Group is headquartered in Toronto with offices in Montreal, Calgary and Vancouver. For more information about TMX Group, visit our website at www.tsx.com.

For more information please contact:
Carolyn Quick
Director, Corporate Communications
TMX Group
416-947-4597
carolyn.quick@tsx.com