The United States government is preparing to charge SAC Capital, the multi-billion dollar hedge fund operated by the reclusive Wall Street trading legend Steven A. Cohen, with criminal charges, according to multiple reports. Manhattan-based federal prosecutors, working in conjunction with the FBI, are poised to move against the massive hedge fund as early as this week. On Wall Street, this type of criminal charge amounts to a death sentence, because few major clients would be willing to invest money with a firm under federal indictment. It’s possible that lawyers for Cohen, a secretive 57-year-old billionaire with lavish tastes in art...