Nvidia (NVDA -0.74%) has been one of the biggest winners since ChatGPT started the artificial intelligence (AI) boom in late 2022. The company's trailing-12-month earnings per share have increased 1,690% since the fiscal year that ended in January 2023, and its share price has increased 715%.Yet several prominent hedge fund managers sold Nvidia during the first quarter and added shares of Palantir Technologies (PLTR 3.54%), a stock that has returned 2,000% since January 2023.Billionaire Ken Griffin of Citad ...