Shares of Freddie Mac (OTC: FMCC), a government-sponsored enterprise conducting business in the U.S. residential mortgage market and the worldwide securities market, have risen sharply in trading today. At last check, FMCC shares were trading 21.43% higher at $0.850 on above average volume of 12.84 million. The stock hit a 52-week high of $0.88 earlier today. FMCC shares have gained more than 108% in the last three trading sessions.