Tech stocks suffer biggest selloff since Covid, as investors see end to AI datacenter boom

The tech-heavy Nasdaq was down more than 1,340 points, or 5.2% in midday trading, shedding more than $3 trillion in market cap, and representing its biggest daily drop since the Liberation Day tariff announcement in April 2025, according to Bloomberg data. The Philadelphia Semiconductor Sector index, which tracks the 30 largest companies in the chips business, was down more than 1,000 points—on track for its single biggest day loss since March 2020. 

Some of the biggest names in tech took it on the chin, with Facebook parent company Meta down 3.4%, Microsoft down 2.8%, and Nvidia down 8%. 

Thursday’s selloff dragged down the entire market, marking a sharp reversal from Wednesday, when shares rallied following the Democrats’ retaking of the Senate and House of Representatives in the midterm elections. Voters overwhelmingly approved candidates and ballot measures that sought to curtail the buildout of AI data centers in the U.S. 

That reality seems to have hit tech stock investors more forcefully on Thursday, as some early signs of the changing business conditions came into focus. 

Meta President Dina Powell McCormick, speaking at a conference organized by the Wall Street Journal on Wednesday, acknowledged the new hurdles. Building data centers in the U.S. is “going to be harder,” she said. “I can also tell you that every hyperscaler is now thinking about ‘Do we need to build outside the United States?’ Because they’re enormous investments, hedging those investments is a wise thing to do.”

Dan Ives, the usually bullish analyst at Yorkville Ives, wrote in a note to investors Thursday that he now expects the tech industry’s capex growth to peak next year, instead of in 2028 or 2029. 

That capex spree has been an engine of the U.S. economy over the past two years as companies such as Alphabet, Microsoft, Amazon, Meta, and Oracle, as well as new so-called neocloud companies, raced to build data centers to run AI services. The companies are spending hundreds of billions of dollars for the chips, computers, and networking gear, in addition to land, energy, and construction, to erect the data centers.  

“While Big Tech and hyperscaler capex should still easily exceed $1 trillion in 2027 the growth rate into 2028 will clearly moderate significantly as the data center buildout comes at a much slower pace given the political map especially in the state of Texas,” Ives wrote. 

“We estimate on the low end 10% of the planned 800-1,000 AI focused data centers in the US will now be wiped off the roadmap, with potentially up to 20% of these facing a much longer regulatory road that could further impact the capacity buildout in the US over the next few years,” Ives wrote.

Chip stocks were some of the worst hit, with Micron, the one of the world’s top 3 makers of memory chips, down roughly 14% and AMD, a rival to Nvidia, also down 14%.