Shares of Visa (V -4.94%), a leading financial services company, are up 12% this year, significantly outperforming broader equities. The company owes that partly to its latest quarterly update, which was strong. Some investors may also feel that Visa is a great stock to own if President Donald Trump's tariff policies lead to inflation, an environment in which Visa can thrive.However, beyond recent financial results and what may or may not happen in the short run, looking at Visa's underlying business reveal ...