South Korea's EWY ETF, heavily weighted toward Samsung Electronics and SK Hynix, traded near $177 on October 9 after a sharp 4% drop the prior session and an approximately 7-8% weekly decline, despite Samsung's record third-quarter operating profit of 107.4 trillion won driven by AI memory demand. Foreign and institutional selling, ETF rebalancing, and options expiration pressured the KOSPI to 6,626, decoupling it from stronger U.S. and Taiwanese benchmarks. Elevated U.S. 10-year Treasury yields above 5.3% and lingering global trade uncertainties add headwinds, while robust chip export growth and corporate earnings revisions provide underlying support ahead of the October 12 week. Traders are monitoring near-term volatility around these levels.