Richard Cohen, center, works with fellow traders on the floor of the New York Stock Exchange Tuesday, Jan. 8, 2013. U.S. stocks opened mostly lower Tuesday as traders awaited the start of U.S. corporate earnings season. (AP Photo/Richard Drew)

Associated Press
Richard Cohen, center, works with fellow traders on the floor of the New York Stock Exchange Tuesday, Jan. 8, 2013. U.S. stocks opened mostly lower Tuesday as traders awaited the start of U.S. corporate earnings season. (AP Photo/Richard Drew)
Richard Cohen, center, works with fellow traders on the floor of the New York Stock Exchange Tuesday, Jan. 8, 2013. U.S. stocks opened mostly lower Tuesday as traders awaited the start of U.S. corporate earnings season. (AP Photo/Richard Drew)
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