FILE - In this July 11, 2011 file photo, a trader works on the floor at the New York Stock Exchange in New York. World stock markets sputtered Friday, July 15, as investors weighed positive economic ... more 
FILE - In this July 11, 2011 file photo, a trader works on the floor at the New York Stock Exchange in New York. World stock markets sputtered Friday, July 15, as investors weighed positive economic indicators against a new warning on U.S. debt. (AP Photo/Seth Wenig, file) less 
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Associated Press | Photo By Seth Wenig, file
Fri, Jul 15, 2011 6:08 AM EDT