A Walmart Supercenter in Rogers, Arkansas in this June 6, 2013 file photo. Wal-Mart Stores Inc on Thursday reported lower-than-expected quarterly revenue, hurt by an unexpected decline in U.S. ... more 
A Walmart Supercenter in Rogers, Arkansas in this June 6, 2013 file photo. Wal-Mart Stores Inc on Thursday reported lower-than-expected quarterly revenue, hurt by an unexpected decline in U.S. comparable sales and what the company called a competitive retail environment. REUTERS/Rick Wilking/Files (UNITED STATES - Tags: BUSINESS) less 
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Reuters | Photo By RICK WILKING / REUTERS
Thu, Nov 14, 2013 8:37 AM EST