SK Hynix is trading at KRW 1,226,000, down 3.62%, as U.S. AI and semiconductor weakness spilled into Korea. - On October 19, local reporting also cited continued foreign selling in Korean semiconductor shares. - Available reporting points to a sector-wide move, not a clear SK Hynix-specific catalyst; the October 18 report on Samsung using TSMC’s process concerned Nvidia’s custom HBM supply chain and does not establish a direct cause for its decline.