South Korea’s stock market renaissance in 2025 was one for the history books. Buoyed by world-beating gains in arms exporters to eye-popping surge in AI and K-beauty shares, the market is headed for its strongest advance in a quarter century.The Kospi Index has soared 76% this year, and will likely close at a fresh record if Tuesday’s early uptickBloomberg Terminal holds. The best performing major equity benchmark globally has been helped this year by chip heavyweights Samsung Electronics Co. an...