Key TakeawaysNvidia shares rose Tuesday, pushing the chipmaker back into the top spot on the list of the world's most valuable companies by market capitalization, ahead of Apple.Nvidia, Apple, and Microsoft have battled for the title this year as the only three companies with a market capitalization over $3 trillion.Demand for Nvidia's chips to power artificial intelligence technology has surged, sending Nvidia's revenue and stock price to record highs this year. Nvidia (NVDA) shares rose Tuesday, pushing t ...