Korea’s KOSPI closed down 5.80% at 6,471.17 after a US Treasury yield spike and a global semiconductor rout hit Samsung Electronics and SK Hynix. A sell-side sidecar fired at the open, retail investors bought the dip, and the won broke below 1,400.
The KOSPI surged past 7,200 intraday on a semiconductor rally, then an afternoon wave of profit-taking erased the entire gain, closing down 1.55% at 6,869.83. Foreign investors kept buying while locals sold, and the collapse of the US-Iran ceasefire added a fresh layer of risk.
The Bank of Korea Base Rate reaches Korean stocks through six channels: the won, foreign flows, valuations, bank margins, exporters, and retail leverage. As of August 2026, margin lending stood near 30.9 trillion won against 100.1 trillion won of investor deposits — here is how to read both around a rate decision.
The KOSPI rose 2.42% to 6,977.94 — a fifth straight gain — after briefly crossing 7,000. Foreign investors bought roughly 1.45 trillion won of KOSPI shares, concentrated in Samsung Electronics and SK Hynix, while soft US inflation data supported risk appetite.
KRX publishes daily net-buying figures for foreigners, institutions, and individuals on data.krx.co.kr and Naver Finance; the on-screen tables are typically labeled in millions of won, while Korean flow headlines quote units of 100 million won. The key skill: split “institutions” into pension, financial-investment, and trust money before drawing any conclusion, because each behaves differently.
The KOSPI closed at 6,813.34, up 3.56% for a fourth straight gain, as an in-line US CPI print and shareholder-return hopes sent foreign investors piling into Samsung Electronics and SK Hynix. The catch: small caps fell and the won weakened.
Korea’s KOSPI closed at 6,579.04, up 3.68%, after Samsung Electronics rose 6.68%, SK hynix gained 5.54%, and futures rose fast enough to trigger a buy-side sidecar. Foreign and institutional buying overwhelmed heavy retail selling, while the KOSDAQ barely recovered from an early drop.
The KOSPI closed at 6,345.53 (+0.73%) as Samsung Electronics jumped 4.13% and foreign buyers returned. A roughly 5% oil spike on Strait of Hormuz tensions pushed the won down to around 1,417 per dollar, while the KOSDAQ faded to a 0.39% gain amid heavy intraday foreign selling.
Korea’s KOSDAQ surged 6.97%, fast enough to trip a buy-side sidecar curb, as money rotated out of Samsung Electronics and SK Hynix into biotech, construction and battery names. The KOSPI added 0.65% to hold near 6,300.
Standard monthly KOSPI 200 options expire on the second Thursday of each month and settle against the 15:20-15:30 closing auction, so some hedge- and arbitrage-linked program flows concentrate into those final ten minutes. Here is how to read the futures basis and KRX program-trade balance beforehand — and what those indicators can and cannot tell you — with a worked reading of August 2026 foreign-flow data.