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A massive sell-off in AI-related tech stocks hit Wall Street on Thursday, Nov. 6, 2026, with the S&P 500 on track for its worst day since the tariff announcements in 2025, according to the Korea Times. The Nasdaq fell 5.5% on Nov. 5, wiping out about 3,400 trillion won in market value in a single day, Yonhap reports. The rout was driven by fears that a Democratic sweep in the U.S. midterms could slow data center build-outs, and it erased all gains from the previous day, which had been the market's best in three months. Korean markets followed suit, with the KOSPI plunging nearly 9% at the open on Nov. 6 to 4911.28, falling below the 5,000 mark for the first time in nine months, while the KOSDAQ dropped nearly 7% to 632.18, according to Chosun Ilbo. Korean investors are reacting with alarm as the AI-driven sell-off spreads globally, with oil prices also rising on Iran war worries, adding to market anxiety.