Trader Gregory Rowe works 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

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Trader Gregory Rowe works 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) less