Nvidia's secret weapon just led to an upgrade from Wall Street (NVDA)

Glassdoor Nvidia has been on an upward tear all year, and Wall Street is just now figuring out why. The company is well known by PC gamers for its graphics processing units, and Nvidia has gained a recent foothold in the data center and driverless-car sectors. But these are just symptoms of Nvidia's biggest weapon: a company culture of innovation. That's accordingto a note to clients from SunTrust Robert Humphrey, who upgraded Nvidia to a Buy and raised the price target on the stock to $177, 12%...