November 6, 2026, (Inside AI) — South Korea's main stock exchange halted trading on Friday morning after the KOSPI plunged, as a sell-off in artificial intelligence stocks accelerated across Asia. The trigger was a sharp tech decline on Wall Street overnight, with investors worried that data center construction could face delays after a sweeping Democratic victory in the U.S. midterm elections.
The KOSPI fell more than 5% at the open, forcing the exchange to activate a circuit breaker. The pause lasted 20 minutes. Similar declines hit Japan's Nikkei 225, which dropped over 3% in early trading, led by semiconductor and AI-related shares.
The sell-off marks a sudden reversal for AI stocks, which have powered global markets for much of the past two years. The Democratic win has raised concerns that new data center projects could face tougher environmental reviews and regulatory hurdles. Investors fear that could slow the buildout of computing infrastructure needed for AI models.
Data Center Delays Threaten AI Growth
Data centers are the backbone of the AI boom. They house the powerful chips that train and run large language models. Any delay in construction could ripple through the supply chain, affecting chipmakers, cloud providers, and AI developers.
"The market is reacting to political uncertainty," said Kim Jae-ho, an analyst at Daishin Securities in Seoul. "The AI trade has been crowded. Any hint of slower infrastructure spending triggers a rush for the exits."
The Democratic victory in the midterms has emboldened lawmakers who favor stricter oversight of AI and its energy consumption. Several newly elected Democrats have called for a pause on new data center permits until environmental impact studies are completed. That stance worries investors who bet on uninterrupted AI growth.
In Japan, Tokyo Electron and Advantest, both major suppliers to AI chipmakers, saw their shares drop more than 4%. South Korea's Samsung Electronics and SK Hynix, key memory chip producers, also fell sharply.
"We are seeing a classic risk-off move," said Park Sun-young, a market strategist at KB Securities in Seoul. "The AI theme has been a one-way bet. Now investors are reassessing the political landscape."
The sell-off also spread to other Asian markets. Hong Kong's Hang Seng Index fell 2.5%, and Taiwan's Taiex dropped 3.2%, with chipmaker TSMC down over 4%.
The U.S. tech sell-off overnight was led by the Nasdaq, which fell 2.8%. AI darlings like Nvidia and Microsoft saw significant declines. The Philadelphia Semiconductor Index dropped 3.5%.
This is not the first time AI stocks have wobbled on political news. In 2024, similar concerns arose when the U.S. government tightened export controls on advanced chips to China. But the market recovered quickly as AI spending remained strong. This time, however, the political shift could be more lasting.
Democratic victories in key states have given the party control of several regulatory agencies. That could lead to new rules on data center energy use and water consumption. The AI industry has already faced criticism for its massive electricity demand. Data centers currently consume about 4% of U.S. electricity, according to the Department of Energy. That figure is expected to rise.
"The market is pricing in a slower buildout," said Lee Min-ji, an analyst at Mirae Asset in Seoul. "But the long-term demand for AI is still there. This could be a buying opportunity for patient investors."
South Korean regulators said they would monitor the situation closely. The Financial Services Commission held an emergency meeting on Friday morning. "We are ready to take stabilizing measures if needed," a commission official said, speaking on condition of anonymity.
The halt on the KOSPI is the first since March 2020, when the onset of the COVID-19 pandemic sent markets into a tailspin. The exchange operator, Korea Exchange, said trading would resume after the circuit breaker expires.
As the session resumed, the KOSPI remained volatile, swinging between gains and losses. By midday, it was down 3.8%. The Japanese yen strengthened against the dollar as investors sought safe havens. Gold prices rose.
The political shift in Washington could have lasting implications for the AI industry. Democratic lawmakers have proposed legislation that would require data centers to meet stricter energy efficiency standards. They also want to increase oversight of AI models that could pose national security risks.
For now, investors are left to weigh the political risks against the still-strong fundamentals of the AI boom. The coming weeks will show whether this sell-off is a temporary correction or the start of a deeper reassessment.
Shamil has a low tolerance for AI that only works in controlled demos. He covers agentic systems and generative AI with the skepticism of someone who has seen too many “revolutionary” tools quietly disappear six months after launch.
