Why Losing Costco Would Matter for American Express; Discover Sues Visa - Stocks to Watch - Barrons.
Earlier this month, news broke that Costco Wholesale (COST) was considering dumping American Express (AXP) as its credit card of choice in the U.S. Susquehanna’s James E Friedman and Xin (Joey) Yang explain why Costco is important to American Express: Cos...