Shares of U.S. power, utility and natural gas companies sold off on Monday in some of the biggest recorded one-day drops, as new AI technology from Chinese start-up DeepSeek cast doubt on a projected surge in U.

US data centers will need 55 gigawatts of new power capacity within the next five years, according to a report released this week by Bloom Energy. The report, based on a survey of 100 data center leaders, also shows that 30% of all sites will be using onsite power by 2030.

Early Monday trading saw sharp declines across the US stock market, triggered by the unexpected rise of a Chinese AI app, DeepSeek. Over the weekend, DeepSeek soared to the top of Apple’s app chart, sending shockwaves through industries tied to artificial intelligence.