Source: Segye Ilbo · 경제

What happened

Korea’s main board closed higher for a fourth straight session on Tuesday, Sept. 23, keeping the 7,000 line while repeating a holiday-eve pattern Segye Ilbo calls “strong early, softer late.” The KOSPI finished at 7,080.92, up 63.01 points (0.90%). It opened at 7,153.99 (+1.94%), held above 1% early, then narrowed — briefly turning negative intraday — before a modest recovery into the close, much like the prior session ahead of Chuseok.

The breakdown

Institutions net bought 316.9 billion won and other corporations 1.6323 trillion won at the regular close. Foreigners switched to net sellers of 504.7 billion won, ending three days of net buying, while individuals net sold 1.4396 trillion won for a fourth straight day — profit-taking before the holiday. Foreigners still net bought 47.3 billion won in KOSPI 200 futures.

Overnight U.S. markets were mixed: Nasdaq +0.45%, Dow -0.36%, S&P 500 flat. Reports of U.S.–Iran contact at the UN on Sept. 22, plus Iranian proposals to reopen the Strait of Hormuz if U.S. military pressure eased, pulled Brent and WTI each down about 1.1–1.2% below $100 per barrel. AI and semiconductor names stayed firm.

Samsung rose 3.25% to 285,500 won after a late push near 3:18 p.m.; SK hynix gained 1.20% to 1,862,000 won after an early peak near 1.9 million (+3.26%). SK Square +5.03% led other large caps; Hyundai Motor -1.94% and Samsung Biologics -1.80% lagged. Medical and precision instruments +3.36% led sectors; construction -5.66% fell hardest. KOSDAQ rose 1.21% to 844.48 with the same fade-and-recover shape. Main-board turnover hit 20.85202 trillion won. At 3:30 p.m., the won was 1,358.4 per dollar, 0.2 won stronger. Daishin Securities’ Lee Kyung-min said oil stabilization lifted the open, but holiday caution and profit-taking trimmed the advance while AI chip momentum held.

Why it matters outside Korea

KOSPI above 7,000 still tracks global chip demand and oil-sensitive risk. Tuesday shows how fast a 1.94% open can shrink to 0.90% when locals step back before a long break while institutions keep buying. For overseas holders of Korea ETFs or ADRs, foreigners selling 504.7 billion won of cash equities but buying 47.3 billion won of index futures looks like repositioning, not a clean exit — a nuance headline index moves often hide.

What travelers and expats should watch

• Holiday FX and market closure: Chuseok starts the next trading day, so bank FX counters and remittance cutoffs may shift while Seoul markets are shut. The 1,358.4 won quote at 3:30 p.m. is a snapshot, not a reopen rate.
• Samsung’s month-end dividend record date: Only a few sessions remain before Samsung’s third-quarter record date, after it flagged a roughly 30 trillion won cash dividend last month. Confirm ex-dividend timing with your broker; the holiday pause does not pause the calendar.
• Sector split under one green headline: Construction’s 5.66% drop coexisted with chip-led gains — a 0.90% KOSPI print does not mean every Korea ETF holding moved alike.

Context

Read this as holiday-eve consolidation above 7,000 with retail and foreign cash profit-taking, not as proof the semiconductor rally has broken. Institutions and corporate buyers offset cautious selling, and AI chip momentum still carried the board.

Source

Segye Ilbo · 경제: 코스피, 추석연휴 앞두고 또 ‘전강후약’…0.9% 올라 7,080 — Korean original; paraphrased for briefing. Soft briefing only — not personalized investment, tax, or securities advice.