The KOSPI closed 0.15% higher at 7,017.91 on Sept. 22 after rising more than 2% and briefly topping 7,100, as retail investors sold about 2 trillion won and foreign investors bought 239.2 billion won for a third consecutive session. Samsung Electronics and SK hynix accounted for 51.28% of KOSPI market capitalization, down from a June peak of 57.11%, while memory chip exports rose 350.7% year over year during the first 20 days of September. Investors rotated among money-market products, index and leveraged ETFs, U.S. long-term Treasury funds and short-term brokerage products, while SoftBank prepared 15.3 trillion won of speculative-grade bonds to fund its OpenAI investment. The Kosdaq fell 0.23% to 834.38, and the Korea Exchange reported fewer after-market volatility interruptions while establishing a nine-member monitoring task force through year-end.