TORONTO, Sept. 28, 2012 /CNW/ - Toronto Stock Exchange, TSX Venture Exchange, Montreal Exchange, TMX Select and Alpha will be closed on Monday, October 8, 2012 for the Thanksgiving holiday. Natural Gas Exchange will remain open for regular trading hours. The markets will re-open and resume regular trading on Tuesday, October 9, 2012. 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, 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. SOURCE TMX GROUP INC.