Global semiconductor stocks witnessed one of their sharpest selloffs of the year as investors reassessed the sustainability of the artificial intelligence boom amid rising capital expenditure, mounting valuation concerns, and reports of a major technological breakthrough in China’s chipmaking industry.
The selloff swept across Asia, Europe, and the United States, erasing billions of dollars in market value from some of the world’s largest semiconductor companies.
South Korea Leads Global Market Decline
The sharpest losses were seen in South Korea.
Memory chip giant SK Hynix tumbled as much as 19%, putting the company on course for its worst single-day decline on record.
The fall came despite the company reporting a 13-fold increase in net profit to 93.9 trillion won (approximately $67.8 billion). While earnings remained exceptionally strong, revenue and operating profit fell short of the market’s elevated expectations.
Samsung Electronics also suffered heavy losses, dropping more than 13% during the trading session.
Together, the declines in SK Hynix and Samsung wiped out roughly one-third of the annual gains recorded by South Korea’s benchmark Kospi Index, which plunged between 11% and 12%, triggering mandatory market-wide circuit breakers.
Authorities reportedly began considering measures to stabilize financial markets as volatility intensified.
China’s Lithography Breakthrough Shakes the Industry
One of the biggest catalysts behind the selloff was growing concern over China’s rapid progress in semiconductor manufacturing.
Reports suggested that a state-backed Chinese company has successfully begun mass production of an immersion Deep Ultraviolet (DUV) lithography machine—a technology that has long been dominated by Dutch semiconductor equipment manufacturer ASML.
If the breakthrough proves commercially viable, analysts believe it could significantly reduce China’s dependence on foreign chipmaking equipment while increasing long-term global semiconductor production capacity.
Investors fear the additional supply could eventually pressure chip prices and compress profit margins across the industry.
AI Spending Faces Growing Scrutiny
The semiconductor sector is also facing increasing investor skepticism over the enormous amount of capital being committed to artificial intelligence infrastructure.
Concerns have intensified around hundreds of billions of dollars in planned investments tied to AI data centers and chip procurement.
Market participants are questioning whether demand for AI computing will grow quickly enough to justify the scale of current infrastructure expansion or whether companies are overbuilding capacity.
The debate has become more prominent following reports of financing arrangements linked to major AI infrastructure projects involving Nvidia and several technology partners.
Investors Rotate Out of Chip Stocks
Despite continued earnings growth across many semiconductor companies, investors appear to be shifting away from one of the market’s strongest-performing sectors.
After years of exceptional gains fueled by the AI boom, semiconductor valuations have reached historically high levels.
With growth beginning to normalize, many institutional investors are rotating capital into more defensive sectors such as healthcare, consumer staples, and utilities, reducing exposure to high-growth technology stocks.
Global Semiconductor Stocks Decline
The selling pressure quickly spread across international markets.
In Japan, semiconductor equipment maker Tokyo Electron dropped nearly 10%, while memory manufacturer Kioxia fell around 17%.
In Taiwan, TSMC, the world’s largest contract chipmaker, declined more than 2%.
European semiconductor equipment giant ASML lost over 8% following reports of China’s lithography advances.
Meanwhile, in the United States, the VanEck Semiconductor ETF (SMH) fell more than 2%, with major chipmakers including AMD, Micron Technology, and Western Digital also recording notable declines.
Why It Matters
The latest selloff reflects a shift in investor sentiment rather than a collapse in semiconductor demand.
Chipmakers continue to benefit from strong AI-driven demand, but markets are increasingly focused on whether unprecedented infrastructure spending can generate sustainable long-term returns.
At the same time, China’s accelerating semiconductor capabilities are raising fresh questions about future competition, pricing power, and the global balance of technological leadership in the chip industry.
As AI investment enters its next phase, investors are likely to pay closer attention not just to revenue growth, but also to profitability, capital discipline, and the pace of technological change across the semiconductor ecosystem.
