stocks-summary

▲ Employees work inside the dealing room of Hana Bank in central Seoul on Sept. 14, 2026. (Yonhap)

SEOUL, Sept. 14 (Yonhap) -- Seoul stocks tumbled by more than 3 percent Monday as investors sold off tech-heavyweights on persisting geopolitical uncertainties and warnings from U.S. tech executives that the pace of artificial intelligence (AI) development may be too fast. The Korean won fell against the U.S. dollar.

After opening sharply lower, the benchmark Korea Composite Stock Price Index (KOSPI) closed down 225.54 points, or 3.26 percent, to 6,684.37.

"The main factor that led the sharp decline was the controversy over the pace of AI development," said Lee Kyoung-min, an analyst from Daishin Securities.

An anticipated meeting expected to reopen transit in the Hormuz Strait was postponed, which led Brent crude, the international oil benchmark, to hover above US$108 per barrel, further cooling investor sentiment, the analyst added.

Over the weekend, Anthropic's co-founder Dario Amodei issued a proposal to slow down the advancement of AI technology to ensure public safety, of which followed a rare show of unity from other AI executives from the United States.

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