File of a board shows stock prices for Wal-Mart at the booth they are traded on the floor of the New York Stock Exchange in New York

 
File of a board shows stock prices for Wal-Mart at the booth they are traded on the floor of the New York Stock Exchange in New York
A board shows stock prices for Wal-Mart at the booth they are traded on the floor of the New York Stock Exchange, in this March 6, 2012 file photo. Shares of Wal-Mart Stores Inc fell 3 percent on Friday after Bloomberg quoted a mid-level executive's email as saying the world's largest retailer had the worst sales start to any month in seven years in February. REUTERS/Brendan McDermid/Files