SK Square is trading 4.05% down at KRW 1,089,000 after a broad Korean semiconductor selloff on September 11, 2026.
- Rising oil prices and U.S. Treasury yields pressured technology valuations.
- SK Hynix and Samsung Electronics also declined, while the KOSPI fell 1.76%.
- The move appears sector- and macro-driven rather than linked to a company-specific announcement; analyst concerns about SK Hynix profitability remain an additional overhang.