American Express, Diners Club/Discover, JCB, Mastercard, UnionPay, and Visa credit, debit, and prepaid cards generated 171.66 billion purchase transactions for goods and services worldwide from January 1 to June 30, 2018, up 23.9% over the same period in 2017. Debit card purchase transactions, which include prepaid, accounted for 53.48% of all global brand card transactions, up slightly from 53.26%. For the first six months of 2018, global cards generated $13.796 trillion in purchase volume worldwide, an increase of 23.3% over the same period in 2017. Purchase volume on credit cards grew 27...