12:00verdict at this hour
KOSDAQ Surges 4%; KOSPI Holds Narrow Gains as Breadth Diverges
Monday, August 10 (2026): the KOSDAQ posted a +4.08% gain — closing at 831.38 — while the KOSPI added just +0.41% to finish at 6,284.12, with the gap between the two the defining feature of the morning session.Intraday, the KOSPI printed a session high of 6,394.06 in the opening minutes before retreating to near flat, leaving a 129.44-point high-to-low range (2.07%) that far exceeded the 3.42% average daily swing for Mondays in the 2026 regime (n=29); the KOSDAQ, by contrast, climbed steadily from its open at 807.66 and was holding around 848 near noon.
12:00Snapshot
A window that records the market at that hour, like a photograph
KOSPI Opens at 6,306, Spikes to 6,394 Within 13 Minutes, Then Fades to Near Flat
Top by trading value10— snapshot
A window on how the top trading-value names have moved up to this hour
SK Hynix Leads KOSPI Turnover at ₩2.44tn; Daehan Optical Tops KOSDAQ at ₩429.2bn
SK hynix dominated KOSPI turnover at ₩2.44tn through the noon hour, with its intraday high of 1,487,000 won printed at 09:14 and its low of 1,418,000 won at 09:02 — the bulk of its price discovery compressed into the first fifteen minutes; Samsung Electronics, the second most traded name at ₩1.88tn, hit its session high of 238,500 won at 09:12 and subsequently drifted to a low of 229,000 won at 11:33.On the KOSDAQ, Daehan Optical Communication printed ₩429.2bn in turnover with a gain of +20.24%, followed by Alteogen at ₩239.8bn (+15.25%) and Jeju Semiconductor at ₩174.8bn (+16.58%), giving the KOSDAQ active list a markedly different character from the KOSPI’s large-cap churn.
| Stock | Prior close | Open | Gap | High (time) | Close |
|---|---|---|---|---|---|
| SK hynix | 1,422,068 | 1,443,000 | +1.47% | 1,487,000 (09:14) | 1,437,000 |
| Samsung Electronics | 230,993 | 236,000 | +2.17% | 238,500 (09:12) | 230,000 |
| Samsung Electro-Mechanics | 1,277,939 | 1,315,000 | +2.90% | 1,357,000 (09:13) | 1,275,000 |
| SK Square | 939,028 | 951,000 | +1.27% | 977,000 (09:14) | 941,000 |
| Samsung Electronics (Pref.) | 170,106 | 172,200 | +1.23% | 175,800 (09:14) | 172,300 |
| Hanwha Solutions | 33,901 | 33,700 | −0.59% | 36,000 (09:02) | 34,850 |
| Kwangju Semiconductor | 7,810 | 8,120 | +3.97% | 9,640 (09:20) | 9,030 |
| Hanwha Aerospace | 1,096,951 | 1,118,000 | +1.92% | 1,169,000 (11:11) | 1,162,000 |
| GS E&C | 31,650 | 32,150 | +1.58% | 35,050 (10:59) | 34,400 |
| LG Electronics | 185,006 | 184,600 | −0.22% | 189,300 (10:04) | 187,800 |
GS E&C was notable for reaching its session high of 35,050 won as late as 10:59, suggesting buying interest extended well into mid-morning rather than fading after the open; Hanwha Aerospace similarly found its high of 1,169,000 won at 11:11, the latest peak among the KOSPI top-ten names.Samsung Electro-Mechanics showed the sharpest reversal: an open at 1,315,000 won, a spike to 1,357,000 won by 09:13, and then a grind lower to 1,258,000 won by 11:36 — a 99,000-won round trip within roughly two and a half hours on ₩520.3bn of turnover.
Gainers5· Decliners5— snapshot
A window on the biggest gainers and decliners, and the reasons behind them
Defense, Bio, and Construction Rally Hard; Financials and Telecoms Lead Declines
The day’s winners were concentrated in defense/aerospace, bio, construction, and power-equipment names: Hanwha Aerospace rose +5.93%, GS Engineering & Construction +8.53%, and Hanwha Solutions +2.80% on the KOSPI, while on the KOSDAQ, Alteogen surged +15.25% and Jusung Engineering +11.58%.On the downside, financials were uniformly lower — Shinhan Financial Group fell −4.64%, KB Financial Group −3.30%, Hana Financial Group −3.27% — and SK Telecom dropped −4.54%, while chemicals also weakened, with Lotte Chemical off −5.08% and LG H&H down −5.25%.Among KOSDAQ decliners by value, the list was short: with most names from ₩100bn-and-above turnover trending higher, GNC Energy was the only clear loser at −2.87%, underscoring how broadly the KOSDAQ advance was distributed today.