FILE - In this Tuesday, Feb. 21, 2012 file photo, traders work on the floor at the New York Stock Exchange in New York. (AP Photo/Seth Wenig, File)

ADDS CONTEXT AHEAD OF MARKET OPEN ON THURSDAY, FEB. 7, 2013 - 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 this morning. (AP Photo/Seth Wenig, File)

ADDS CONTEXT AHEAD OF MARKET OPEN ON THURSDAY, FEB. 7, 2013 - 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 this morning. (AP Photo/Seth Wenig, File)

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 this morning. (AP Photo/Seth Wenig, File)

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)