Nvidia Corp.’s $3 trillion run-up in market value in the two years since ChatGPT helped trigger an AI frenzy is bigger than any stock rally in history in such a short time span. But the landscape is now changing for the chipmaker.

Nvidia ( NVDA -3.00%) dominated much of the conversation among investors in 2024 as the stock marched 171% higher for the year. That was for good reason, as revenue and earnings exploded, with many big tech companies scrambling to acquire Nvidia's advanced chips for artificial intelligence (AI) data centers.

U.S. stock indexes closed their best week in two months with a flourish Friday. The Standard & Poor's 500 climbed 1% to clinch its first winning week in the last three. The Dow Jones industrial average rose 0.

Drops for Nvidia and other superstar stocks are dragging U.S. stock indexes lower on Monday and keeping Wall Street stuck in its weekslong rut. The S&P 500 fell 0.8% in early trading, coming off its fourth losing week in the last five.