Investors seem to be rotating out of the top AI chip stock and into its lesser-known peer.Nvidia (NVDA -6.08%) has delighted its shareholders with a return of nearly 1,000% since the start of 2023, but Thursday brought investors a rare post-earnings drop as the AI chip leader closed down 6.4% for the day.While the company beat headline estimates on the top and bottom lines, the sell-off in the stock seemed to have more to do with valuation and growth concerns.Nvidia is now worth $3 trillion, meaning the ups ...