The sell-off that slammed South Korea’s stock market Friday did not start in Seoul. It began in New York, with a late reversal in US technology shares that punctured the AI rally. The Kospi index fell so hard and so fast that trading was halted for 20 minutes after an 8.2 percent plunge.
Circuit breakers are rare. This one shows how exposed Asia’s chip-heavy markets are to a single narrative: that the artificial intelligence spending boom may be running on borrowed time.
The index is on pace for its worst weekly decline in more than three months. South Korea’s two largest chipmakers, Samsung Electronics and SK Hynix, each lost more than 9 percent at one point during the session. Foreign investors dumped Kospi-listed shares worth roughly 2.6 trillion won — about $1.68 billion — in a single day, according to exchange data.
That is not a slow retreat. That is a stampede.
The trigger was a late sell-off on Wall Street Thursday. The Nasdaq fell as investors began asking a hard question: who will actually pay for all the AI infrastructure being built? The so-called hyperscalers — the giant cloud and data-center operators — are spending billions.
But if the returns do not materialize, the spending stops. Market participants are now watching for cracks in that logic. Strong demand signals from US chipmakers Micron Technology and Qualcomm were not enough to calm the nerves.
This matters far beyond South Korea. The sell-off carries direct implications for Central Asian markets.
Kazakhstan and Uzbekistan have been pitching themselves as low-cost, high-potential destinations for AI infrastructure investment. Cheap power. Proximity to major markets.
The pitch relies on the assumption that hyperscaler spending will keep growing. A pullback could slow those plans before they even get off the ground.
Countries that have been positioning for a wave of AI-linked investment may find the wave receding. Trading on the Kospi resumed after the 20-minute pause. But the index did not recover.
The broader question now is whether this is a sharp correction that finds a floor or the start of something deeper. The AI-driven rally that lifted Asian tech stocks earlier this year was built on a consensus that spending would keep rising. That consensus is now being tested.
For individual investors in Seoul, the day was brutal. For policymakers in Almaty or Tashkent, it was a warning.
For anyone betting that the AI boom would lift all boats, it was a reminder that booms can reverse as quickly as they begin. The circuit breaker halted the trading. It did not halt the uncertainty.
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