Nvidia Is Gaining Today Despite Big Sell-Offs for the S&P 500 -- Is It Time to Buy the Artificial Intelligence (AI) Stock?

Is it too late to score big wins with Nvidia stock and the AI revolution?Nvidia (NVDA -1.10%) stock is climbing higher in today's trading. The company's share price was up 1.3% as of 3:15 p.m. ET, and had been up as much as 4.8% earlier in the day's trading. Meanwhile, the S&P 500 (^GSPC -2.72%) was down 1.5%, and the Nasdaq Composite (^IXIC -3.56%) was down 1.9% due to hawkish comments from Federal Reserve chairman Jerome Powell that were delivered in conjunction with an interest rate cut.Multiple upward c ...