BENTONVILLE, AR -- Wal-Mart Mart, the world's largest retailer, got a lift last week when Wall Street powerhouse J.P. Morgan Chase raised its rating on the company's stock to "buy" from an earlier "long-term buy."

Retail analyst Shari Eberts commented, "Valuation stock looks full, but we believe it will be sustainable in the next several quarters, as Wal-Mart's fundamentals far outpace its peers, given its ...