All American Express, Discover/Diners Club, JCB, MasterCard, UnionPay, and Visa credit, debit, and prepaid cards generated 195.56 billion purchase transactions at merchants worldwide last year. Combined credit, debit, and prepaid card purchase transactions are projected to reach 362.30 billion in 2019. The most popular cards for purchases worldwide in 2014 were Visa debit (including prepaid) cards with 71.94 billion purchase transactions, accounting for 36.79% of the industry total. However, Visa’s debit card market share fell 127 basis points from 2013. Visa credit cards were the seco...