Seoul — August 07, 2026. Published after the market close; prices are official closing values.
The 30-second version
- The KOSPI closed at 6,258.77, down 0.60% — a number that hides a wild ride. The index opened 1.09% higher, touched 6,415.60, then swung to an intraday loss of as much as 0.81% before late bargain-hunting trimmed the damage.
- The KOSDAQ, Korea’s smaller-cap growth board, finished at 798.81 (-0.36%) after briefly falling almost 2.8%.
- Foreign investors bought early, then flipped to heavy selling — roughly 434 billion won (about $310 million) net sold on the KOSPI by early afternoon, per intraday snapshots. Institutions bought against the fall.
- Money rotated out of semiconductors into batteries, defense and banks; Samsung SDI jumped more than 7% intraday.
- The won closed around 1,418 per dollar, slightly firmer on the day.
- The next catalyst: US July nonfarm payrolls, released after Seoul’s close.
A strong open that didn’t survive the morning
Thursday’s slump in chip heavyweights had set up hopes that the bad news was already priced in, and the KOSPI opened Friday at 6,365.07 — up 1.09% from Thursday’s 6,296.38 close — before climbing as high as 6,415.60. Dip-buyers positioning ahead of the US jobs report did the early lifting.
It didn’t hold. By around 11 a.m. the entire gain was gone and the index was down 0.81% at 6,245.55, and it remained in the red into the early afternoon. A second wave of bargain-hunting then pared the loss to 0.60% at the close, per exchange closing values reported by Gukje News.
Under the surface, breadth was ugly. At one point in the morning, KOSPI decliners outnumbered advancers 502 to 359, and on the KOSDAQ the ratio was worse than two-to-one — 1,158 falling stocks against 483 rising. In other words, the headline indexes were held together by a handful of strong names while most of the market bled.
Foreigners sold into strength; institutions caught the knife
One caveat up front: final full-day investor totals were not confirmed at publication, so the flow figures below are intraday snapshots, not closing tallies.
The pattern within the day was clear, though. At 9:25 a.m., foreign investors were net buyers of about 288 billion won of KOSPI shares. By 11:05 a.m. they had flipped to net sellers, and by 1:14 p.m. their net selling had swelled to roughly 434 billion won (about $310 million). On the other side, domestic institutions leaned in as the index fell, reaching about 466 billion won (roughly $330 million) of net buying by early afternoon. Retail investors net sold in the morning and tapered off later. On the KOSDAQ, mid-morning snapshots showed individuals as the main buyers while foreigners and institutions sold.
The bigger backdrop: over the previous four sessions (August 3–6), retail investors had poured a net 7.62 trillion won (about $5.4 billion) into KOSPI shares, while foreigners sold a net 5.07 trillion won (about $3.6 billion) and institutions 2.90 trillion won (about $2.0 billion), according to Financial News. Despite that wall of retail money, the index had gone essentially nowhere — because Samsung Electronics and SK hynix slumped. The two chip giants still steer the whole index.
Rotation day: batteries and defense up, chips still heavy
With semiconductors out of favor, money rotated elsewhere. In intraday trading, battery names led: Samsung SDI surged 7.26%, EcoPro gained 3.59%, EcoPro BM 2.63% and LG Energy Solution 2.02%. Samsung Electro-Mechanics added 2.20%. Defense name Hanwha Aerospace rose 1.52%, with the aerospace-and-defense sector index up 1.49% and banks up 1.53%. Samsung Electronics itself held relatively firm, fluctuating between +0.11% and +2.06% during the session. (Individual-stock figures come from intraday reports and may differ slightly from final closes.)
The losing side was broader. SK hynix swung between -0.74% and -5.08% intraday, and the semiconductor and chip-equipment sector indexes each fell 1.66%. Metals dropped 3.03%, machinery 2.51%, shipbuilding 1.83%, electric-and-electronics 1.65% and autos 1.47%. Notable single-stock decliners included Samsung Life (-4.17%), Hyundai Mobis (-3.64%) and HD Hyundai Heavy Industries (-2.86%).
Why the chip gloom? Overnight, US memory makers disappointed — SanDisk fell 6.74% and Western Digital tumbled 13.03% — dragging down US chip stocks and, with them, sentiment toward Korea’s memory-heavy large caps. Layered on top: rising US–Iran tension around the Strait of Hormuz, which is pressuring oil prices and market interest rates and helped push New York lower on Thursday (Dow -0.85%, S&P 500 -0.18%, Nasdaq -0.06%).
Key closing numbers
| Metric | Close | Change |
|---|---|---|
| KOSPI | 6,258.77 | -37.61 pts (-0.60%) |
| KOSDAQ | 798.81 | -2.86 pts (-0.36%) |
| USD/KRW | around 1,418 | won slightly firmer |
| KOSPI intraday high | 6,415.60 | — |
What to watch next
- US July nonfarm payrolls, released after Seoul’s close. Per local reports, a strong print gives the Fed more room to stay tight, while a weak one could ease worries about a September rate move — either way, Seoul’s next session could open with a gap.
- Foreign flows. Whether the afternoon’s foreign selling extends the pattern seen over August 3–6, or fades.
- Samsung Electronics and SK hynix. As the past week showed, index direction still hinges on the two chip heavyweights, whatever retail buys elsewhere.
- The Strait of Hormuz. US–Iran tension is a live risk for oil prices and rates, and was flagged as a key watch point for next week.
FAQ
Why did the KOSPI fall on August 7?
An early rebound rally faded as foreign investors turned sellers and semiconductor stocks stayed weak following poor US memory-chip earnings (SanDisk -6.74%, Western Digital -13.03% overnight). Late dip-buying, led by domestic institutions, limited the closing loss to 0.60%.
Are foreign investors selling Korean stocks?
They were on Friday afternoon — intraday snapshots showed net selling of roughly 434 billion won (about $310 million) of KOSPI shares by 1:14 p.m., after net buying in the morning. That follows about 5.07 trillion won of net foreign selling over the prior four sessions. Final full-day totals for Friday were not confirmed at publication.
Why did Korean battery stocks rally while chip stocks fell?
It was a rotation: with Samsung Electronics and SK hynix under pressure, investors shifted into other large themes. Battery names (Samsung SDI +7.26% intraday), defense and banks absorbed the flows, while semiconductor sector indexes fell 1.66%.
What happens if US payrolls surprise?
The report lands while Seoul is closed, so any reaction shows up at the next open. Local coverage framed it simply: strong jobs data supports further Fed tightening; weak data eases September rate worries. Volatility in either direction is the base case.
Disclaimer: This is an information and analysis publication, not investment advice. See our Methodology for data sources, standards, and our corrections policy.