Specialist Meric Greenbaum, left, works at his post on the floor of the New York Stock Exchange Tuesday, Jan. 29, 2013. Stocks opened mixed on Wall Street, with the Standard & Poor's 500 holding at 1,500. (AP Photo/Richard Drew)

Associated Press
Specialist Meric Greenbaum, left, works at his post on the floor of the New York Stock Exchange Tuesday, Jan. 29, 2013. Stocks opened mixed on Wall Street, with the Standard & Poor's 500 holding at 1,500. (AP Photo/Richard Drew)
Specialist Meric Greenbaum, left, works at his post on the floor of the New York Stock Exchange Tuesday, Jan. 29, 2013. Stocks opened mixed on Wall Street, with the Standard & Poor's 500 holding at 1,500. (AP Photo/Richard Drew)
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