American Express, Discover, MasterCard, and Visa, brand consumer and commercial credit, debit, and prepaid cards issued in the U.S. generated $1.213 trillion in purchase volume in the first quarter of 2016, an increase of 9.3% over the same period in 2015. Purchase volume on credit cards of $699.68 billion was up 8.7%. MasterCard grew 11.2%, Visa grew 10.5%, Discover grew 4.4%, and American Express grew 4.1%. Cash volume on credit cards of $25.29 billion from balance transfers, from ATMs, over the counter, and from paper checks was up 10.5%. As a percentage of total credit card volume, c...