For what it's worth, Wall Street is overwhelmingly bullish. Among the 65% of analysts who follow Nvidia, 92% rate the stock a buy and the other 8% rate it a hold ahead of the company's third-quarter earnings report. Not a single analyst recommends selling Nvidia at the present time. Here's what investors should know.

Nvidia stock has been the poster child for artificial intelligence and continues to defy the odds. But is the stock still a buy?

Wall Street in terms of market value, but in the eyes of the 128-year-old Dow Jones Industrial Average, its stock is ranked well below average. The semiconductor maker and leader of the artificial-intelligence boom officially became a member of the venerable index at 9:30 a.