
Kenneth Griffin, founder and chief executive officer of Citadel Investment Group LLC, testifies at a Senate Banking subcommittee hearing in Washington, D.C., U.S., on Monday, June 22, 2009. Griffin, who two months ago called U.S. intervention in the financial system "frightening," now favors new federal rules because they may benefit clearinghouses such as his joint venture with CME Group Inc. Photographer: Joshua Roberts/Bloomberg News
JOSHUA ROBERTS/BLOOMBERG NEWS