Visa, Mastercard, American Express, and Discover credit, debit, and prepaid cards generated 43.88 billion purchase transactions from January 1 through June 30, 2016 — up 4.34 billion or 11.0% over the first six months of 2015. Debit cards accounted for 63.16% of those transactions, down from 63.29%. Credit cards accounted for 36.84%, up from 36.71%. Visa debit cards generated 44.75% of all purchase transactions, down from 44.95%. Mastercard debit cards generated 18.41%, up from 18.34%. Visa credit cards generated 19.88% of all purchase transactions, up from 19.47%. Mastercard’s credit c...