MarketsSK Hynix and LG Electronics push Korean stocks toward virtuous-cycle territorySamsung's union suspended its planned strike after reaching a last-minute deal with management late on May 20. © APKIM JAEWONMay 21, 2026 17:48 JSTSEOUL -- South Korea's stock market soared on Thursday, its benchmark KOSPI index gaining more than 8% thanks to the resolution of a labor dispute at Samsung Electronics and Nvidia's stellar performance announced overnight in the U.S.