Investors expect a lot of Nvidia...We've gotten used to Nvidia (NVDA 1.53%) reaching "firsts" or records -- the company repeatedly has launched the world's fastest artificial intelligence (AI) chip yet and reported its highest quarterly revenue ever. Nvidia's standout moments have been very positive. But in recent days, the situation hasn't been as bright.As the general market tumbled, so did Nvidia. The star AI stock has dropped 12% since the start of the month, and last week in just one day it lost $279 b ...