MarketsKioxia eclipses Toyota's market cap to become Japan's most valuable listingThe KOSPI's rally comes at the end of a seesaw week for the bourse. (Photo by Suzu Takahashi)KIM JAEWON and JADA NAGUMOJune 12, 2026 12:47 JSTSEOUL/TOKYO -- South Korean stocks soared more than 8% at one point on Friday morning, riding the tail of an overnight stock rally in the U.S. as market participants bet on expectations for a Middle East settlement.