Nvidia stock has taken one particular direction following past earnings reports...Nvidia (NVDA -3.38%) has been one of the stock market's biggest winners over the past few years, thanks to its strength in one game-changing area: artificial intelligence (AI). The company is the world's No. 1 AI chip designer, generating billions of dollars in revenue from sales of these items along with related products and services.What keeps Nvidia ahead is the power and efficiency of its chips, known as graphics processin ...