Nvidia is the gold standard and leading provider of the graphics processing units (GPUs) used to train and run AI systems. The company is believed to control as much as 98% of the data center GPU market, according to semiconductor analyst firm TechInsights. If AI models can be trained on lower-cost, inferior chips, Nvidia has a lot to lose.

Key Takeaways The S&P 500 and Nasdaq plunged at midday when Chinese artificial intelligence startup DeepSeek shook up the sector with a lower-cost large language model.Shares of chip makers, power providers,