South Korean shares traded lower after all three major U.S. stock indexes fell, oil prices surged and Treasury yields rose. Samsung Electronics was down 3.16% at 260,500 won and SK hynix declined 3.40% to 1.79 million won as of 8:12 a.m. on the 11th, according to Nextrade. Technology stocks faced heavier selling, with Nvidia down 2.26%, Micron Technology off 4.90% and SK hynix's American depositary receipts falling 5.20%. WTI crude settled 6.69% higher at $102.48 a barrel, while Brent rose 6.34% to $107.63. The 10-year U.S. Treasury yield exceeded 4.95%, its highest level since October 2023, while markets saw a strong chance of a Federal Reserve rate increase at this month's Federal Open Market Committee meeting. The European Central Bank raised all three policy rates by 0.25 percentage point each on the 10th. Kiwoom Securities analyst Han Ji-young expected the KOSPI to open lower but said earnings momentum in semiconductors and improving fund flows should support its recovery path.