Mexico's Walmex first-quarter profit falls 4.5 pct By: Reuters: Company News April 22, 2014 at 18:15 PM EDT MEXICO CITY, April 22 (Reuters) - Mexico's biggest retailer, Wal-Mart de Mexico, on Tuesday reported a 4.5 percent slump in first-quarter profit. Read More >> Related Stocks: Wal-Mart Stores, Inc.