American Express Company (AXP), headquartered in New York, operates as an integrated payments company. With a market cap of $220 billion, the company’s principal products and services are charge and credit payment card products and travel-related services offered to consumers and businesses around the world. Companies worth $200 billion or more are generally described as “mega-cap stocks,” and AXP definitely fits that description, with its market cap exceeding this threshold, reflecting its substantial s ...