Visa, Mastercard, Discover, and American Express consumer and commercial credit, debit, and prepaid cards issued in the U.S. generated $1.550 trillion in payment volume in the first quarter of 2019 (January 1 through March 31), up 8.1% over the same period in 2018. Payment volume on credit cards of $903.86 billion grew 7.3%. Mastercard payment volume grew 10.0%. American Express was up 7.1%, Discover grew 6.6%, and Visa increased 6.3%. Cash volume on credit cards of $28.44 billion from balance transfers, ATMs, over the counter, and paper checks declined by 1.1%. Cash amounted to 3.05% of to...