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 6,345.53 (+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 customs service publishes preliminary export data on the 1st, 11th and 21st of every month — one of the earliest official readings on global chip demand. Here is what each release contains, why working-day-adjusted daily averages beat the headline YoY number, and how Samsung Electronics and SK hynix trade the print.
The KOSPI opened more than 1% higher and touched 6,415 before closing down 0.60% at 6,258.77 as foreign investors turned sellers. Battery, defense and bank stocks rallied in intraday trading while semiconductors stayed weak ahead of US July payrolls.
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.
Korea’s KOSPI closed at 6,598.26, up 3.76%, after AI semiconductor euphoria from Wall Street triggered a buy-side sidecar and produced 12 limit-up stocks — the most in a day since tracking began in June 2022. Foreigners bought over 1.4 trillion won intraday while retail investors sold.
Korea imports roughly 95% of its energy, so an oil spike widens the trade deficit, pressures the won (which closed at 1,423.98 per dollar on August 4, 2026), feeds inflation, and triggers foreign selling on the KOSPI. Here is the full transmission chain, the sectors hit in each direction, and the exact data releases to watch.
DRAM spot prices historically turn one to two quarters before Samsung Electronics and SK Hynix earnings inflect — and those two stocks drive the KOSPI. Here is where to find the DXI index, DRAMeXchange spot quotes, and hyperscaler capex guidance, and how to read a cycle turn step by step.