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Feb. 6 (Bloomberg) -- U.S. derivatives exchanges including CME Group Inc. tumbled in New York trading after the Department of Justice said their trade-processing practices may be anti- competitive.
CME, the world's largest futures exchange, fell 11 percent, the steepest drop in more than five years. Nymex Holdings Inc., owner of the world's biggest energy market, declined 8.9 percent, and Intercontinental Exchange Inc., owner of Europe's largest energy market, lost 3.6 percent.
http://www.bloomberg.com/apps/news?pid=20601087&sid=apYFj1_7ptzk&refer=home (http://www.bloomberg.com/apps/news?pid=20601087&sid=apYFj1_7ptzk&refer=home)