Wal-Mart de Mexico SAB (OTC: WMMVY) reported a 1.9% drop in its same-store sales in February. Walmex's total sales for the month climbed 2.1% to 30.27 billion pesos ($2.38 billion). Its sales rose 2.4% in Mexico and gained 0.2% in Central America. Walmex shares closed at $30.30 yesterday.