JP Morgan’s Wall Street chief talks China, bitcoin, Amazon and is preparing for an inevitable big downturn in stocks

An Argentinean who spent much of his early career in volatile emerging markets, Pinto, 55, began at J.P. Morgan Chase in 1983 as a currency trader in Buenos Aires. Thanks to his ability to manage risk in a series of roles, Pinto has climbed the ranks. In 2014, he was named head of the firm's corporate and investment bank, the world's biggest by revenue.