In May, the core same-store sales growth rate of Costco (COST.US) slowed to 6.0%, while e-commerce surged by 11.6%.

According to the Securities Times APP, Costco (COST.US) released its May retail data, showing that global same-store sales increased by 4.3%, with a growth of 4.1% in the US region, 3.3% in the Canadian region, and 6.3% in the international market.