SAC Capital Advisors LP, the $14 billion hedge fund run by Steven A. Cohen, is under mounting scrutiny as the U.S. investigates its trading in InterMune Inc. (ITMN) and Weight Watchers International Inc. (WTW), according to a person with knowledge of the matter. The U.S. Securities and Exchange Commission and the Federal Bureau of Investigation are looking into the trades, said the person, who asked not to be identified because the matter wasn’t public. News of the probe comes after SAC Capital told clients on Nov. 28 that it had received a so-called Wells notice from the SEC related to Mathew Martoma, a former ... (full story)