It's not as much as you might think -- but does that matter?Visa's (V 0.10%) performance is often directly correlated with the economy. That makes a lot of sense, since Visa is the largest credit card network in the world and powers trillions of dollars in global money moving.The common argument is that the economy is in growth mode more frequently than not, and therefore, Visa is growing more often than not. That makes it an excellent contender as a reliable, no-brainer stock to create shareholder value.Th ...