FILE - A board on the floor of the New York Stock Exchange in this March 28, 2013 file photo shows the closing number for the S&P 500 index. World stock markets fell Friday April 12, 2013 as

... more 

FILE - A board on the floor of the New York Stock Exchange in this March 28, 2013 file photo shows the closing number for the S&P 500 index. World stock markets fell Friday April 12, 2013 as investors turned cautious and took profits from recent rallies in spite of evidence pointing to an improving U.S. employment picture. (AP Photo/Richard Drew, File) less 

1 / 30
Associated Press
Fri, Apr 12, 2013 4:15 PM EDT