Seoul's Kospi index dived 8.5%, triggering a circuit breaker which suspended trading for 20 minutes. (EPA Images pic)TOKYO: Japanese and South Korean shares plunged Friday after US shares tumbled overnight on worries that midterm election results could slow or derail the artificial intelligence data center investment boom.
Tokyo's benchmark Nikkei 225 index fell 5.1% to 56,930 points in early trade.
Seoul's Kospi index dived 8.5% to 4,923 -- triggering a circuit breaker which suspended trading for 20 minutes.
Investors had initially cheered Tuesday's Democratic drubbing of US President Donald Trump's Republican Party.
