The 11 largest issuers of general purpose (Visa, Mastercard, American Express, and Discover) credit cards in the U.S. at midyear 2016 accounted for $673.68 billion in outstandings as of June 30, 2016 (up 4.5%), and $1.307 trillion in credit card total volume (up 8.1%) for January 1 through June 30, 2016, versus the same periods the prior year. All figures include consumer and commercial card products combined. Figures shown for American Express and Discover represent only their direct issuing business. They exclude products issued by third parties, which are credited to those issuers. Ameri...