When blockchain arrives in fintech, Visa, PayPal and other companies will feel the pain By: MarketWatch January 21, 2020 at 10:56 AM EST Blockchain will dramatically lower transaction costs for retailers, which paid a collective $108 billion last year. Read More >> Related Stocks: Block Inc Fidelity National Information Services Fiserv Global Payments Inc JPMorgan Chase & Co MasterCard Paypal Holdings Tencent Holdings ADR Visa