12:00verdict at this hour
KOSPI Gaps Down Hard at Open, Stages Mid-Morning Rally, Then Fades Into Lunch
The KOSPI opened Wednesday, August 19 (2026) at 6,528.77, sold off sharply to an intraday low of 6,400.81 at 09:17, then clawed back to a session high of 6,614.39 at 10:22 — a swing of 213.58 points, or 3.34% of range — before fading to the 6,490s by the noon snapshot.The KOSDAQ followed a divergent script: after dipping briefly to 804.02 at 09:01, the junior market recovered firmly, spending most of the late morning above 830 — a markedly shallower drawdown than the large-cap board, consistent with domestic-oriented names holding better in a session dominated by semiconductor selling.
12:00Snapshot
A window that records the market at that hour, like a photograph
Broad selling at the open gives way to a two-hour rally, then a partial fade — the KOSPI’s intraday range reaches 213.58 points (3.34%) as of the noon snapshot.
Top by trading value10— snapshot
A window on how the top trading-value names have moved up to this hour
SK hynix and Samsung Electronics dominate turnover at ₩3.30tn and ₩2.90tn respectively, both off their morning lows by the noon snapshot.
By the 11:52 intraday snapshot, SK hynix had traded ₩3,301.7bn in turnover — the heaviest on the KOSPI — having swung from a low of 1,501,000 won at 09:16 to a high of 1,559,000 at 10:20, a range of ₩58,000 per share.Samsung Electronics, second in turnover at ₩2,896.4bn, similarly bottomed at 247,000 won at 09:27 before recovering to 254,500 at 10:15; Samsung Electro-Mechanics ranked third at ₩669.2bn, with a range of 81,000 won between its session low of 1,350,000 and high of 1,431,000.
| Stock | Prior close | Open | Gap | High (time) | 12:00 Current Price | Change | Low (time) |
|---|---|---|---|---|---|---|---|
| SK hynix | 1,662,000 | 1,545,000 | −7.04% | 1,559,000 (10:20) | 1,521,000 (12:00) | −8.48% | 1,501,000 (09:16) |
| Samsung Electronics | 268,500 | 251,500 | −6.33% | 254,500 (10:15) | 249,250 (12:00) | −7.17% | 247,000 (09:27) |
| Samsung Electro-Mechanics | 1,440,000 | 1,357,000 | −5.76% | 1,431,000 (10:20) | 1,370,000 (12:00) | −4.86% | 1,351,000 (09:04) |
| SK Square | 1,135,000 | 1,030,000 | −9.25% | 1,042,000 (10:22) | 1,011,000 (12:00) | −10.93% | 993,000 (09:26) |
| Hanwha Aerospace | 1,146,000 | 1,255,000 | +9.51% | 1,255,000 (09:02) | 1,171,000 (12:00) | +2.18% | 1,146,000 (09:01) |
| Samsung Electronics (Pref.) | 188,300 | 176,400 | −6.32% | 178,700 (10:23) | 174,600 (12:00) | −7.28% | 172,700 (09:05) |
| SK eternix | 58,500 | 56,400 | −3.59% | 60,700 (09:10) | 59,100 (12:00) | +1.03% | 55,000 (09:16) |
| Samsung SDI | 488,000 | 467,500 | −4.20% | 501,000 (10:21) | 489,000 (12:00) | +0.20% | 469,000 (09:01) |
| Hyundai Motor | 435,000 | 416,000 | −4.37% | 422,500 (10:30) | 413,000 (12:00) | −5.06% | 406,500 (09:27) |
| Isu Petasys | 102,900 | 99,900 | −2.92% | 110,800 (10:15) | 106,800 (12:00) | +3.79% | 98,400 (09:01) |
Hanwha Aerospace showed an atypical intraday path: its session high of 1,255,000 won came at the open (09:02), and it spent the morning drifting lower to a low of 1,150,000 at 09:45 before partially recovering — an open-to-low pattern that contrasts with the broad market’s V-shape recovery in the 09:15–10:22 window.Isu Petasys, tenth in KOSPI turnover at ₩111.6bn, opened at 99,200 won and reached its high of 110,800 at 10:15, holding gains into the noon hour — one of the few KOSPI names to sustain its morning bounce.
Gainers5· Decliners5— snapshot
A window on the biggest gainers and decliners, and the reasons behind them
Chip giants lead broad declines as the KOSPI closes at 6,536.85, down 4.85% on the day, while defense and construction names partially offset losses.
On the KOSPI, the session’s gainers are concentrated in defense, construction, and select energy names: Hanwha Aerospace rose +2.97%, Hyundai Engineering & Construction +4.90%, HD Hyundai Energy Solutions +7.54%, and Isu Petasys +3.98%.Declines are concentrated in semiconductors and their holding companies: SK Square fell −10.75%, Samsung Life −9.18%, SK hynix −8.18%, and Samsung Electronics −6.89%.On the KOSDAQ, the pattern is more mixed: Ananti surged +21.78% and Bioneer +29.99%, while the KOSDAQ’s by-turnover leader Ingenio Therapeutics (Reg.S) dropped −6.06%; HPSP gained +8.56% and was the second-heaviest traded name on the junior board at ₩165.4bn turnover.