NYSE Euronext (NYX) today announced trading volumes for its global derivatives and cash equities exchanges for May 2011(*). Global derivatives average daily volume (“ADV”) of 10.6 million contracts in May 2011 decreased 20.6% versus the prior year, which benefited from unseasonally strong trading volumes due to heightened market volatility driven by the sovereign debt crisis in Europe. May 2010 was the highest level of derivatives monthly trading volume in 2010. When compared to the strong first quarter of 2011, global derivatives trading volumes quarter-to-date (ex. Bclear) are running approximately 13% below first quarter 2011 levels. Cash equities ADV declined in May 2011, with European cash ADV decreasing 22.0% and U.S. cash trading volumes decreasing 45.5% from May 2010 levels, but trading volumes at both venues increased when compared to April 2011.