In this Jan. 25, 2012 photo, traders John Santiago, left, and Craig Spector work on the floor of the New York Stock Exchange. World stock markets fell Monday, Jan. 30, 2012, as uncertainty about a ... more 
In this Jan. 25, 2012 photo, traders John Santiago, left, and Craig Spector work on the floor of the New York Stock Exchange. World stock markets fell Monday, Jan. 30, 2012, as uncertainty about a tentative deal to resolve Greece's debt crisis weighed on investor sentiment ahead of a summit of European leaders. (AP Photo/Richard Drew) less 
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Associated Press | Photo By Richard Drew
Mon, Jan 30, 2012 7:13 AM EST