Wal-Mart and American Express will expand their Bluebird prepaid card to more than 4, 000 stores nationwide next week.

FORBES: Red Light For Green Dot Investors On Wal-Mart, Amex Threat

In another case, FedEx (Federal Express) chose to expand overseas when its domestic market was saturated.

FORBES: Ready to Go Global? Six Tips To Help You Decide

Operating as a separate company backed by New York Life and run by Toan, Express Scripts rapidly turned profitable and began to expand, selling its services mostly to employee health plans.

FORBES: Script doctor

Operating as a separate company with Toan in charge and backing from New York Life, Express Scripts rapidly turned profitable and began to expand, selling its services mostly to employee health plans and other small groups.

FORBES: Script doctor

In 1991, American Express was suffering from the results of a failed attempt to expand into a full-fledged financial services conglomerate and needed cash.

FORBES: Buffett and New Berkshire Manager Both Love Credit Cards but Go Different Directions