Chicago

SUPPLIERS of everything from groceries to sports equipment are already being squeezed for price cuts and cost sharing by Wal-Mart Stores. Now they are bracing for the pressure to ratchet up even more after a shock earnings warning from the retailer last week.

The discount store has always had a reputation for demanding lower prices from vendors but Reuters has learned from interviews with suppliers and consultants, as well as reviewing some contracts, that even by its standards Wal-Mart has been turning up the heat on them this year.