Freddie Mac shares were off $ 7.87 , or 13.2 percent , at $ 52 in midday trading on the New York Stock Exchange .
Freddie Mac shares were down more than 16 per cent at $ 50.18 at midday yesterday .
These despicable acts were committed by killers whose only faith is hate and the United States will find the killers and they will learn the meaning of American justice .