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On Friday, Nov. 6, the KOSPI plunged more than 8% in early trade, prompting the Korea Exchange to activate a circuit breaker that halted trading for 20 minutes at 9:03 a.m., Yonhap and KBS World report. The index opened at 5263.26, down 120.54 points (2.24%), then fell 471.89 points (8.76%) by the halt, according to Yonhap. The sell-off, driven by tech shares and fears of AI regulation, follows Thursday's 4% intraday tumble that triggered a sell-side sidecar, as reported by Korea Times and Business Korea. Korean media outlets, including Maeil Business and Hankyung, are covering the crash as a historic plunge, with the KOSPI breaking below the 5,000 level intraday, while the KOSDAQ fell 5-6%.