NEW YORK (CNNMoney) -- Wal-Mart's core shoppers are running out of money much faster than a year ago due to rising gasoline prices, and the retail giant is worried, CEO Mike Duke said Wednesday. "We're seeing core consumers under a lot of pressure," Duke said at an event in New York. "There's no doubt that rising fuel prices are having an impact."

http://money.cnn.com/2011/04/27/news/companies/walmart_ceo_consumers_under_pressure/index.htm