Seoul shares plunge over 5 pct on AI regulation concerns after U.S. midterms

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SEOUL, Nov. 5 (Yonhap) -- South Korean stocks plunged more than 5 percent Thursday as the Democratic Party's landslide in the U.S. midterm elections sparked concerns over tighter regulations on artificial intelligence (AI) investments. The local currency fell against the U.S. dollar.

The benchmark Korea Composite Stock Price Index (KOSPI) fell 300 points, or 5.28 percent, to close at 5,383.80.

After opening 1.82 percent lower, the index extended losses in the morning, and the bourse operator activated a sell-side sidecar at 10:16 a.m. to suspend program trading for the KOSPI-listed shares for five minutes.

The Democrats' victory, dubbed a "blue wave," raised concerns that the new Congress that takes control in January could tighten regulations on AI data centers, potentially affecting investment in the sector.

Financial data is shown on a screen inside the dealing room of Hana Bank in central Seoul on Nov. 5, 2026. (Yonhap)

Seoul shares plunge over 5 pct on AI regulation concerns after U.S. midterms

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首尔，11月5日（韩联社）——由于美国民主党在中期选举中大获全胜，引发了人们对人工智能（AI）投资监管趋严的担忧，韩国股市周四暴跌逾5%。韩元兑美元汇率也随之下跌。

韩国综合股价指数（KOSPI）下跌300点，跌幅5.28%，收于5383.80点。

该指数开盘下跌 1.82%，早盘跌幅扩大，交易所运营商于上午 10:16 启动卖方侧车交易，暂停 KOSPI 上市股票的程序化交易 5 分钟。

民主党的胜利被称为“蓝色浪潮”，引发了人们的担忧，即明年1月上任的新一届国会可能会收紧对人工智能数据中心的监管，这可能会影响该行业的投资。

2026年11月5日，首尔市中心韩亚银行交易室内的屏幕上显示着金融数据。（韩联社）

美国中期选举后，受人工智能监管担忧影响，首尔股市暴跌逾5%。