Traders work on the floor of the New York Stock Exchange Friday, 

Traders work on the floor of the New York Stock Exchange Friday, April 19, 2013. The broad Standard & Poor's 500 index opened higher early Friday.  (AP Photo/Richard Drew)
Associated Press
Traders work on the floor of the New York Stock Exchange Friday, April 19, 2013. The broad Standard & Poor's 500 index opened higher early Friday. (AP Photo/Richard Drew)
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