237350.KS is trading at KRW 68,825.00, down 3.74%, as heavy foreign and institutional selling weighed on Korean equities. - The October 20 KOSPI selloff was driven by heavy foreign and institutional selling; reports also cited rising U.S. Treasury yields and concerns about returns on AI investment. - Semiconductor weakness added pressure: SK hynix and Samsung Electronics fell, with chipmakers among the biggest drags on the index. - The pressure was broad across Korean equities and the sector, not ETF-specific. No volume information was provided.