TMX Group – Consolidated Trading Statistics May 2012: Toronto Stock Exchange, TSX Venture Exchange, TMX Select, Montreal Exchange, Natural Gas Exchange - Montreal Exchange Achieves Monthly Trading Volume Record

TMX Group Inc. today announced May 2012 trading statistics for its diversified group of exchanges – Toronto Stock Exchange, TSX Venture Exchange, Montreal Exchange (MX) and Natural Gas Exchange (NGX), as well as TMX Select, TMX Group's alternative trading system.

MX achieved a monthly trading volume record for May 2012 with 6,720,566 contracts traded, which surpassed the previous record of 6,179,988 contracts traded that was set in August 2011. Volume increased 18% from April 2012 and was up 23% from the same month a year earlier. Open interest contracts at the end of May 2012 were up 1% from the end of April 2012 and increased 11% from the end of May 2011.

Trading volume on Toronto Stock Exchange increased 12% in May 2012 from April 2012, though was down 10% compared to May 2011. Transactions were up 10% from April 2012, and increased 4% from the same month a year earlier.

Volume on TSX Venture Exchange fell 5% from April 2012 and was down 38% compared to May 2011. Transactions were down 7% from the previous month and decreased 38% from May 2011.

NGX experienced a 2% increase in volume in May 2012 compared to April 2012, and was up 26% compared to May 2011.