The 12 largest issuers of Visa, Mastercard, American Express, and Discover general purpose credit cards in the U.S. owned $781.75 billion in outstandings as of June 30, 2018, an increase of 6.5% from June 30, 2017. The 12 largest issuers based on general purpose credit card purchase volume (no cash advances or balance transfers) accounted for $1.561 trillion from January 1 through June 30, 2018, an increase of 10.5% versus the same period in 2017. Figures include consumer, small business, and commercial card products combined. Figures shown for American Express and Discover represent only thei...