Trader Robert Arciero works on the floor of the New York Stock Exchange Tuesday, March 12, 2013. Stocks are edging lower on Wall Street in early trading following a seven-day rally. (A

 

              Trader Robert Arciero works on the floor of the New York Stock Exchange Tuesday, March 12, 2013.  Stocks are edging lower on Wall Street in early trading following a seven-day rally. (A
Trader Robert Arciero works on the floor of the New York Stock Exchange Tuesday, March 12, 2013. Stocks are edging lower on Wall Street in early trading following a seven-day rally. (AP Photo/Richard Drew)