South Korea's KOSPI fell 215.99 points, or 3.12%, to close at 6,696.96 on August 24, its first decline in three trading days, as higher U.S. Treasury yields and President Donald Trump's renewed tariff war against Canada weakened investor sentiment. Retail investors bought a net ₩3.84 trillion, approximately $2.8 billion, but foreign investors sold ₩3.8974 trillion and institutions sold ₩1.6649 trillion, overwhelming domestic individual buying. Samsung Electronics plunged 8.79% and SK Hynix fell 2.95%, while Samsung Life Insurance, Samsung C&T and SK Square also declined sharply. The KOSDAQ moved in the opposite direction, gaining 1.42% to 813.33 as foreign and institutional investors bought shares and retail investors took profits. Investors are now watching U.S. Personal Consumption Expenditures data and the Jackson Hole meeting, with volatility also being amplified by concentrated market capitalization in Samsung Electronics and SK Hynix, elevated VKOSPI readings and profit-taking after the KOSPI's steep advance.