World shares are mixed, with South Korea's Kospi down nearly 8% on a sell-off of chip shares

World shares were mixed as South Korea's Kospi index fell nearly 8% due to a sell-off in chip stocks, with SK Hynix and Samsung Electronics dropping significantly. Concerns over potential supply gluts in AI and tech sectors weighed on markets, while European benchmarks rose. Oil prices declined amid Iran-U.S. negotiations.