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The Democratic Party's sweeping victory in the 2026 U.S. midterm elections, dubbed a "blue tsunami," has triggered a global market selloff amid fears of tighter AI and big tech regulations. On Nov. 5, the KOSPI plunged more than 5%, and on Nov. 6 it fell over 8% in early trade, prompting a circuit breaker and sidecar, before closing down more than 6% and barely holding above 5,000, according to KBS World. Business Korea reports Asian markets, including South Korea and Japan, saw sharp declines on Nov. 6 amid fears of a slowdown in U.S. AI investment. Chosun Ilbo notes the Nasdaq collapsed, with a record 3,355 trillion won in market cap evaporating in a day, and the KOSPI briefly broke below 5,000 for the first time in nine months. Korean individual investors, who had entered the market on "AI rosy outlooks" pushed by politicians and brokerages, voiced complaints, with one major bank executive saying, "The entire nation lost property through stocks." Meanwhile, Dong-a Ilbo reports President Donald Trump, facing the blue tsunami, warned of up to 300% tariffs on foreign companies that don't build factories in the U.S., and hinted at further attacks in the Iran war. Korea Economic Daily adds that "Trump Coin" crashed, with one token's value falling from $70 to $1.