FILE - In this Tuesday, Feb. 21, 2012 file photo, traders work 

FILE - In this Tuesday, Feb. 21, 2012 file photo, traders work on the floor at the New York Stock Exchange in New York. Stock markets around the world are mixed, Thursday, Feb. 7, 2013. Investors in Japan took profits following a huge rally, while those in China pulled back ahead of a weeklong holiday. However, European markets are higher in early trading. Futures point to a rise when trading opens on Wall Street Thursday morning. (AP Photo/Seth Wenig, File)
Associated Press
FILE - In this Tuesday, Feb. 21, 2012 file photo, traders work on the floor at the New York Stock Exchange in New York. Stock markets around the world are mixed, Thursday, Feb. 7, 2013. Investors in Japan took profits following a huge rally, while those in China pulled back ahead of a weeklong holiday. However, European markets are higher in early trading. Futures point to a rise when trading opens on Wall Street Thursday morning. (AP Photo/Seth Wenig, File)
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