The downturn came after a strong run that had pushed AI-focused names to record highs, prompting growing debate over whether the rally had run too far, too fast.
“The question now is whether the break lower has cleared out excessive optimism that may have built into their stock prices, or if it's just the start of a longer downturn,” analysts noted as investors reassessed valuations across the sector.
By mid-afternoon trading, the S&P 500 had dropped 1.4% after briefly edging into positive territory earlier in the session. The Dow Jones Industrial Average was down 772 points, or 1.5%, while the Nasdaq composite fell 1.8%, reflecting the heavy pressure on technology stocks.
AI Leaders Under Pressure as Valuations Come Into Focus
Much of the sell-off centered on companies tied closely to the artificial intelligence boom, which has driven much of the market’s gains over the past year.
Nvidia, the chip giant whose valuation has surged to nearly $4.9 trillion on AI demand, was one of the biggest drags on the market, sliding 3.4% and weighing heavily on the S&P 500.
Elsewhere in the sector, semiconductor equipment makers and AI infrastructure firms also saw volatile trading. KLA Corporation initially surged as much as 7.7% before giving up most of its gains, finishing near flat as momentum faded.
The broader concern among investors is that AI-related stocks have become stretched after an extended rally driven by expectations of long-term technological transformation.
Super Micro Tumbles on $7 Billion Capital Raise
One of the sharpest individual declines came from Super Micro Computer, which plunged 23.1% after announcing plans to raise $7 billion through a mix of stock and convertible preferred share offerings.
The move sparked concern among shareholders, as such capital raises are typically most attractive when share prices are elevated—but they also dilute existing ownership.
“Such moves raise the most money for companies when their stock prices are high, and they can dilute the ownership stakes of existing shareholders,” market observers said.
Volatile Semiconductor Trade as Investors Rotate Positions
Memory chip maker Micron Technology added to the day’s turbulence, swinging between losses and gains before ending down 4.7%. The stock has seen extreme volatility in recent sessions, including steep drops and a sharp rebound earlier in the week, even as it remains up more than 200% year-to-date.
Investors also rotated in and out of semiconductor-related names throughout the session, with early gains fading as sentiment weakened across the broader tech sector.
Inflation Data and Interest Rate Expectations Add Pressure
Outside equities, bond markets remained relatively steady after fresh inflation data showed price growth accelerating to a three-year high—though largely in line with economists’ expectations.
The yield on the 10-year U.S. Treasury edged slightly higher to 4.54%, while the two-year yield slipped marginally to 4.12%, reflecting cautious adjustments in rate expectations.
Traders are increasingly positioning for the possibility that the Federal Reserve may still need to raise interest rates at least once more this year, given persistent inflation and a resilient labor market.
Oil Prices and Global Markets Add to Uncertainty
Energy markets also contributed to broader unease, with crude prices rising amid geopolitical tensions and uncertainty around negotiations involving Iran and access to key shipping routes.
International markets mirrored the volatility. South Korea’s Kospi index dropped 4.5%, weighed down by major tech exporters such as Samsung Electronics and SK Hynix. In Japan, the Nikkei 225 fell 1.9%, with technology-heavy conglomerate SoftBank Group sliding 8.3% amid renewed pressure on AI-linked assets.
“AI bubble” debate returns to the forefront
The latest pullback has reignited concerns among some investors and analysts that parts of the AI sector may have entered bubble territory, with valuations potentially running ahead of fundamentals.
High interest rates continue to add pressure, as elevated Treasury yields make risk assets less attractive and can weigh most heavily on companies whose growth expectations are priced far into the future.
For now, Wall Street remains split between viewing the sell-off as a healthy correction—or the early stages of a deeper unwinding of the AI trade that has dominated markets for much of the past year.