November 30, 2011 (TORONTO) – Toronto Stock Exchange is currently experiencing technical difficulties with symbols beginning with M to Z. An investigation is currently underway. We will provide more updates as information becomes available. Apparently a pack of monkeys broke in and unplugged all the M to Z trading desks.

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, TMX Select, Montréal Exchange, Canadian Derivatives Clearing Corporation, Natural Gas Exchange, Boston Options Exchange (BOX), Shorcan, Shorcan Energy, 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 (Montréal, Calgary and Vancouver), in key U.S. markets (Houston, Boston and Chicago) as well as in London and Beijing. For more information about TMX Group, visit our website atwww.tmx.com.

For more information please contact:

Carolyn Quick
Director, Corporate Communications
TMX Group
1-416-947-4597
carolyn.quick@tmx.com