Associated Press
CORRECTS NAME OF SPEAKER- U. S. Attorney for the Southern district  of N.Y. Preet Bharara, left, looks on as Robert Khuzami, director of the SEC division of enforcement speaks at a news conference, Tuesday, Nov. 20, 2012, in New York.  Mathew Martoma, a former hedge fund portfolio manager was arrested Tuesday on charges that he helped carry out the most lucrative insider trading scheme in U.S. history, nabling investment advisers and their hedge funds to make more than $276 million in illegal profits. (AP Photo/Louis Lanzano)

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