Overview
- The KOSPI closed down about 2.7% at 6,889.74 on Sept. 28, ending a four-session winning streak from before the Chuseok holiday.
- Market losses were led by Samsung Electronics and SK hynix, which each tumbled roughly 5% and heavily weighed on the benchmark because of their large index weightings.
- Foreign and institutional investors were net sellers by large margins while individual investors were net buyers, producing sizable net outflows reported in the trading session.
- Elevated U.S. Treasury yields, which rose to around 5.17% during the holiday, squeezed valuations and contributed to profit‑taking that hit rate‑sensitive large caps.
- The KOSDAQ showed pockets of buying in smaller growth and tech names, Brent crude eased toward about $104 on reports of diplomatic steps on the U.S.‑Iran situation, and the Korean won weakened during the session.