Federal prosecutors in New York on Friday asked a U.S. appeals court to reconsider a landmark ruling that curtailed their ability to pursue insider trading cases and jeopardized several convictions. Prosecutors under Manhattan U.S. Attorney Preet Bharara asked the 2nd U.S. Circuit Court of Appeals to grant a rehearing in the case of hedge fund managers Todd Newman and Anthony Chiasson, who in December won the reversal of their insider trading convictions.