MarketsAI-linked semiconductor stocks raise benchmark index over 87%, year to dateRelentless global rush into artificial intelligence-linked semiconductor stocks continues to propel Seoul's market. (Source photos by AP and Reuters)KIM JAEWONMay 11, 2026 12:15 JSTUpdated on May 11, 2026 14:29 JSTSEOUL -- South Korea's benchmark stock index hit a record high during intraday trading on Monday, as SK Hynix and Samsung Electronics, the market's two biggest stocks, ride the artificial intelligence boom.