.png?w=1024)
A sharp sell-off in AI stocks hit South Korea on Tuesday, underscoring how closely the country’s economy is tied to global demand for AI chips.
The Kospi plunged 10% as investors dumped shares of Samsung Electronics and SK Hynix, triggering a circuit breaker and a 20-minute cooling-off session. The sell-off hit close to home because the two memory-chip giants account for about half of the Kospi’s value and sit at the center of South Korea’s semiconductor industry, export economy, supplier base, and technology workforce.
South Korea led the sell-off
CNN reported that Samsung and SK Hynix both fell by more than 12%, dragging down the broader market and triggering a temporary trading halt on the Kospi.
“These big moves are part of a growing trend of rising volatility in tech stocks generally,” James Reilly, senior markets economist at Capital Economics, said in a note cited by CNN.
“This volatility is, in our view, evidence of excessive froth and calls into question the sustainability of this rally,” Reilly said.
For South Korea, the concern goes beyond one rough trading day.
Samsung and SK Hynix help support a wide network of suppliers, contractors, engineers, and manufacturing jobs tied to semiconductors. A sharp drop in those companies can also affect investor confidence, employee stock holdings, and expectations for one of the country’s most important export industries.
The pressure was not limited to South Korea.
Japan’s Nikkei 225 fell 3.6% Tuesday, while SoftBank dropped 15%, according to CNN. AP said that Taiwan’s Taiex, another tech-heavy Asian market, fell 2.2% Wednesday.
The AP report also showed how quickly the picture can change. South Korea’s Kospi rebounded 3.3% Wednesday, Samsung Electronics jumped 9.8%, and SK Hynix rose 1%.
The rebound suggested Tuesday’s plunge may have been a sharp reset rather than a lasting collapse. It also showed how sensitive APAC markets have become to AI chip sentiment.
Wall Street felt the chip sell-off
The sell-off moved into US markets, where the tech-heavy Nasdaq fell 2.21%, and the S&P 500 dropped 1.44% Tuesday. The Dow, which has less exposure to tech, was nearly flat.
Semiconductor stocks were hit especially hard. According to CNN, Nvidia fell about 4%, Oracle dropped more than 5.5%, Micron Technology sank 13%, and Marvell Technology lost 9%.
Investors are watching Micron closely because its earnings may give the market a clearer read on memory-chip demand tied to AI infrastructure.
South Korea has become one of the clearest market signals for the AI boom because of its dominance in memory chips, especially high-bandwidth memory used in AI systems. When investors question AI valuations, SK Hynix and Samsung can become early pressure points.
SK Hynix is still betting on AI capacity
Reuters reported Wednesday that SK Hynix plans to raise to 45.45 trillion won, or about $29.43 billion, through an American Depositary Receipt listing on Nasdaq.
The company said proceeds would support chip production capacity, including a chip factory in Yongin, an advanced packaging fab in Cheongju, and chipmaking equipment.
The timing is striking.
SK Hynix was one of the companies at the center of the sell-off, yet it is also preparing a major fundraising push tied to AI chip demand. Reuters noted that the company is a dominant supplier of high-bandwidth memory chips used in AI systems for customers such as Nvidia and Google.
The split between market nerves and chipmaker spending is the clearest tension in the AI trade right now. Investors are questioning whether AI stocks have run too far. While companies such as SK Hynix are still raising capital and expanding capacity to meet demand, they expect to keep growing.
The sell-off does not end the AI infrastructure boom. It does show how much of that boom now runs through Asian markets, especially South Korea, where a shift in AI sentiment can quickly turn into a market-wide shock.
For South Korean investors, workers, and suppliers, the lesson is immediate. When confidence in AI spending weakens, the pressure can move quickly from chip stocks to local markets, major employers, and the country’s broader semiconductor economy.
Read more: Tim Cook says Apple price hikes are unavoidable as AI strains chip supply.