Wall Street’s artificial-intelligence boom ran into its sharpest reality check in months Thursday, as a punishing selloff erased roughly $3 trillion from S&P 500 companies and sent shock waves through Asian markets hours later.
The technology-heavy Nasdaq composite sank 5.5% to 24,315.00, leaving it 11.9% below its recent record and officially in correction territory. The S&P 500 dropped 4.4% to 7,353.73, while the Dow Jones Industrial Average fell 1,833.06 points, or 3.4%, to 51,523.06, according to Associated Press market data.
A one-day reversal wipes out the rally
The plunge came one day after U.S. stocks had surged on falling oil prices and optimism following the midterm elections. Thursday’s reversal was swift and broad, but the damage was concentrated in the companies that have carried the market’s AI trade.
The Philadelphia Semiconductor Index tumbled 12.2%. Nvidia lost 9.3% and Advanced Micro Devices slid 17.3%, while other chipmakers and data-center suppliers were hit by a rush to reduce exposure. Reuters reported the S&P 500’s 4.4% decline was its steepest one-day fall since April 2025.
No single headline caused the rout. Instead, several concerns converged: questions about how quickly enormous AI investments will produce profits, a disappointing outlook from chipmaker Qualcomm, elevated borrowing costs and renewed political scrutiny of the power-hungry data centers that underpin the AI economy.
The AI spending debate moves to center stage
Technology companies have committed hundreds of billions of dollars to chips, servers, power generation and new data-center campuses. Investors have generally rewarded that spending, betting that AI products will transform corporate productivity and consumer services.
But the scale of those commitments has also made the sector more vulnerable to any sign that demand, margins or financing conditions may weaken. When highly valued stocks are crowded into the same investment portfolios, a modest reassessment can quickly become forced selling as leveraged traders and funds race to cut risk.
The political backdrop added another layer of uncertainty. Data-center development became a prominent issue in several U.S. races, with voters and candidates raising questions about electricity prices, water use and local environmental costs. The election results did not create the selloff on their own, but they intensified expectations that new projects could face tougher oversight or slower approvals.
Asia absorbs the shock
The selling spread across the Pacific on Friday. Japan’s Nikkei briefly fell about 7% before trimming its decline, while South Korea’s KOSPI dropped as much as 8.8%, triggering a circuit breaker that temporarily halted trading. Taiwan’s market also slid sharply, and Taiwan Semiconductor Manufacturing Co. touched its daily lower limit before recovering some ground.
Authorities in several markets sought to reassure investors, helping stocks move off their worst levels. Even so, the episode showed how closely Asian chipmakers, equipment suppliers and manufacturers are tied to U.S. expectations for the AI buildout. Reuters’ global markets outlook identified the AI selloff and the resulting flight toward safer assets as the dominant theme heading into the next trading week.
What investors are watching next
Government bonds rallied as money moved away from stocks, pushing yields lower. That defensive shift may offer some support if borrowing costs ease, but it also reflects rising concern about whether the market’s most expensive companies can continue to justify their valuations.
Attention now turns to upcoming U.S. employment and inflation reports, along with the Federal Reserve’s next policy decision. Strong economic data could reinforce expectations for higher rates, increasing pressure on richly valued technology shares. Softer data might calm rate fears but raise questions about demand.
For now, the selloff is a correction rather than proof that the AI investment cycle has ended. The larger message is that the market has moved from rewarding AI spending almost automatically to demanding clearer evidence of returns. After Thursday’s wipeout, that evidence will carry a much higher price.
Sources
- Associated Press: Wall Street indexes and company moves
- Reuters: Global market selloff and semiconductor losses
- Reuters: Global markets outlook
