Share prices of the semiconductor giant are up, and its historic AI-fueled run isn't over yet.Nvidia (NVDA 0.43%) shares are trading up about 30% this year, through the week ending Aug. 29, driven by the frenzy around artificial intelligence (AI). The semiconductor chipmaker's stock bounced back from a 52-week low reached on April 7 after President Donald Trump's announcement of new tariffs triggered a stock market crash.Just because Nvidia's share price rebounded doesn't mean you missed the boat to buy. On ...