Gathering AI storm clouds doom tech stocks to darkest day in a year

Big tech stocks slumped Thursday, putting them on track for their biggest decline since the "Liberation ​Day" rout last year, the most significant shakeout yet in what has been a ​punishing autumn for the AI trade. The Nasdaq 100 index was set ‌for ​market-value declines exceeding $2 trillion on investor fears that the Democratic Party's sweeping midterm victorycould stall AI infrastructure expansion and force a chaotic reckoning for smaller firms whose capacity to raise funds has already been limited by higher interest rates and tighter financial conditions.

Analysts and portfolio managers said declines in once-hot areas such ‌as semiconductors and AI infrastructure weren't entirely surprising, given the scale of earlier gains in many of these stocks and the financing concerns that have shadowed the so-called neoclouds, smaller infrastructure firms such as Nebius and CoreWeave, since US interest rates rose late in the summer. But many said the scale of the declines for a second straight day suggest a change in sentiment that could portend further selling.

"Despite the magnitude of today’s move, volatility ‌has not yet reached the capitulation or contrarian extremes historically associated with capitulation points," said Adam Turnquist, chief cross-asset strategist for LPL Financial in Charlotte, North Carolina. LOSING BIG IN A ONCE-HOT SECTOR

Shares of semiconductor ‌and neocloud companies posted the most significant declines, reflecting worries that data center buildouts worth billions of dollars could face delays. The Philadelphia SE Semiconductor index fell as much as 11.2% to touch its lowest level in more than six months. Nvidia dropped 9% and Advanced Micro slumped 15%. Hyperscalers, which defied Wednesday's broad tech selloff, also dropped. Amazon.com fell 2.5% and Alphabet slid 2%.

The selling suggests investors are starting to account for the unpopularity of the data-center buildout, with some skeptics saying the costs it has imposed on ⁠US communities ​have yet to be fully considered. "There's going to be a ⁠lot of pushback about those data centers being geographically located in someone's backyard, straining the power grid, straining the water systems," said Bruce Zaro, managing director at Granite Wealth Management in Plymouth, Massachusetts. "Although there are a number of data centers already approved, there ⁠are still a lot to be permitted. There's going to be a difficult road to get those permitted forthcoming."

Around 30% of expected US data center capacity additions in 2028 could be at risk from potential construction pauses, UBS analysts estimated, highlighting ​the threat to an industry whose growth depends on a rapid build out of new facilities. The political jitters are hitting an AI trade already on shaky footing, due to worries ⁠about the return on investment for the enormous sums being poured into the technology.

AI WINNERS WILT CoreWeave, which has become a barometer of investor anxiety over heavy AI spending, slumped 12%. Its five-year credit default spreads, which measure the expectations of a potential default, widened to ⁠a ​record high, according to S&P Global Market Intelligence data.

Nebius, another neocloud company, dropped 15%. Shares of both firms have dropped by half or more since the Nasdaq Composite hit a record on October 6. The sharp declines put the Nasdaq Composite on track to enter correction territory, representing a 10% drop from its recent peak. The Nasdaq 100 was last down 5.9%.

"The market's moving from the promise of AI ⁠to the price of AI," said Ted Parkhill, founder and CEO of Incline Investment Management. "There's no question that AI is going to be transformative for the world in the long run. But that ⁠doesn't mean every AI-related stock is currently priced appropriately. There's going ⁠to be a lot of turmoil."

Data-center operators Applied Digital, Cipher Digital and IREN tumbled more than 14% each. The weakness extended to utilities and equipment suppliers exposed to the buildout. GE Vernova fell about 6%, while Constellation Energy slipped 3%.

Microsoft declined 2%. The company is tightening oversight of some data center projects ‌from Nebius, IREN and Nscale, Bloomberg News ‌reported.