verdict at the close
Both indices closed higher, but their peaks came at different hours — KOSPI in the morning, KOSDAQ in the afternoon
On Thursday, 27 August 2026, KOSPI closed provisionally at 6,879.87, up +1.05% on the day, and KOSDAQ at 834.39, up +0.91%.The direction was the same but the shape of the day was not — among the most-traded names, the KOSPI side opened close to its high while the KOSDAQ side opened far below it.SK hynix opened at +5.21% against a high of +5.92%, barely any distance at all, while Haechitech opened at +1.28% and ran to a high of +29.96%.Both closing levels are still provisional — the sources disagree and figures may be under correction immediately after the close.
The day’s path
A window marking the hours when direction turned during the session
KOSPI leaders bottomed around 14:16 while KOSDAQ leaders peaked around 14:14
Top by trading value10— snapshot
A window on how the top trading-value names have moved up to this hour
The top two names traded KRW 5,496.9 bn and KRW 4,426.9 bn, far ahead of the third
| Stock | Prior close | Open | Gap | High (time) | Close | Change | Low (time) |
|---|---|---|---|---|---|---|---|
| SK hynix | 1,688,000 | — | — | — | 1,730,000 | +2.49% | — |
| Samsung Electronics | 261,500 | — | — | — | 266,000 | +1.72% | — |
| Samsung Electro-Mechanics | 1,330,000 | — | — | — | 1,385,000 | +4.14% | — |
| Samsung Electronics (Pref.) | 196,800 | — | — | — | 194,300 | −1.27% | — |
| Samsung SDI | 516,000 | — | — | — | 569,000 | +10.27% | — |
| SK Square | 1,058,000 | — | — | — | 1,068,000 | +0.95% | — |
| Hyundai Motor | 408,000 | — | — | — | 398,000 | −2.45% | — |
| Daewoo E&C | 19,100 | — | — | — | 20,000 | +4.71% | — |
| Doosan Enerbility | 85,800 | — | — | — | 85,900 | +0.12% | — |
| Hyundai Mobis | 464,000 | — | — | — | 451,500 | −2.69% | — |
At the close, KOSPI turnover was led by SK hynix at KRW 5,496.9 bn and Samsung Electronics at KRW 4,426.9 bn, with a wide gap to third-placed Samsung Electro-Mechanics (KRW 820.0 bn).On KOSDAQ, Taihan Fiberoptics ranked first (KRW 403.2 bn), with Simmtech (KRW 213.7 bn) and Haechitech (KRW 185.4 bn) — both of which made their highs in the afternoon — also in the top group.Closing percentage changes for individual names had not arrived in the collected data by the time of this edition — only opens, highs, lows and their timestamps are confirmed.
Flow summary
A window on how much foreign investors, retail investors, investment firms and pension funds each bought and sold
On KOSPI foreign investors bought a net +KRW 137.0bn and institutions +KRW 181.6bn, while retail sold -KRW 1,913.8bn — all provisional
The stocks that moved the market — top by turnover10
A window on which investor groups backed the most heavily traded stocks
SK hynix at KRW 5,496.9 bn and Samsung Electronics at KRW 4,426.9 bn took the top two places in KOSPI turnover
Among the ten most-traded KOSPI names, SK hynix ranked first at KRW 5,496.9 bn and Samsung Electronics second at KRW 4,426.9 bn, followed by Samsung Electro-Mechanics (KRW 820.0 bn), Samsung Electronics preferred (KRW 763.0 bn) and Samsung SDI (KRW 525.7 bn).On KOSDAQ, Taihan Fiberoptics traded the most at KRW 403.2 bn, ahead of Simmtech (KRW 213.7 bn), Haechitech (KRW 185.4 bn) and Silicon2 (KRW 177.7 bn).With exchange data access restricted, this list comes from the fallback route.
| Stock | Close | Change | Turnover | Foreign investors | Institutions | Investment firms | Pension funds | Retail investors |
|---|---|---|---|---|---|---|---|---|
| SK hynix | ₩1,730,000 (≈$1,248.20) | +2.49% | ₩5.50tn | — | — | — | — | — |
| Samsung Electronics | ₩266,000 (≈$191.92) | +1.72% | ₩4.43tn | — | — | — | — | — |
| Samsung Electro-Mechanics | ₩1,385,000 (≈$999.28) | +4.14% | ₩820.0bn | — | — | — | — | — |
| Samsung Electronics (Pref.) | ₩194,300 (≈$140.19) | −1.27% | ₩763.2bn | — | — | — | — | — |
| Samsung SDI | ₩569,000 (≈$410.53) | +10.27% | ₩525.7bn | — | — | — | — | — |
| SK Square | ₩1,068,000 (≈$770.56) | +0.95% | ₩502.8bn | — | — | — | — | — |
| Hyundai Motor | ₩398,000 (≈$287.16) | −2.45% | ₩460.0bn | — | — | — | — | — |
| Daewoo E&C | ₩20,000 (≈$14.43) | +4.71% | ₩450.9bn | — | — | — | — | — |
| Doosan Enerbility | ₩85,900 (≈$61.98) | +0.12% | ₩322.4bn | — | — | — | — | — |
| Hyundai Mobis | ₩451,500 (≈$325.76) | −2.69% | ₩306.0bn | — | — | — | — | — |
Gainers5· Decliners5 — KOSPI & KOSDAQ
A window on the biggest gainers and decliners, and the reasons behind them
KOSPI +1.05%, KOSDAQ +0.91% — both rose, but the afternoon strength sat on the KOSDAQ side
The intraday paths of the most-traded names show the difference between the two markets plainly.On KOSPI, SK hynix opened at +5.21%, set a high of +5.92%, then fell to a low of +1.18% at 10:01; Samsung Electronics opened +3.25% with a high of +3.63% before a low of +0.38% at 09:53.The lows deepened into the afternoon — Hyundai Motor fell to -3.19% at 14:16 and Hyundai Mobis to -3.56% at 14:17.KOSDAQ ran the other way — Simmtech peaked at +14.42% at 12:43, Haechitech at +29.96% at 12:42, Y-Chips at +20.79% at 14:14 and Ecopro at +6.09% at 14:41. Most KOSDAQ leaders made their highs after lunch.Why these names moved as they did could not be confirmed from the data available today — the unconfirmed-catalyst marker remains in place, and no cause is invented to fill it.
After-Hours Outlook
A window on what to watch in after-hours trade once the regular session ends
A day when KOSPI leaders made their lows in the afternoon — after-hours flow is covered in the after-market edition
After-hours trading data had not been confirmed by the time of this edition — it is filled in the after-market edition.Only what was confirmed within today is set down here — the lows of the KOSPI leaders clustered at 14:16 and 14:17, while the highs of the KOSDAQ leaders clustered at 12:42, 14:14 and 14:41. In the same stretch of afternoon the two markets made opposite extremes.Both closing levels are still provisional and the flow figures were collected before 19:00 today. Until those two are confirmed this evening, the day is not summed up as finished.