10:00verdict at this hour
Kospi gaps up sharply at the open, led by semiconductors and autos
Thursday, August 13 (2026): the Kospi opened at 6,801 and surged to an intraday high of 6,895.63 by 09:10, as overnight gains in the Philadelphia Semiconductor IndexA US equity index tracking roughly 30 semiconductor design and manufacturing companies, widely used as a leading indicator for Korean chipmakers.When SOX moves sharply overnight, Kospi semiconductor names — SK hynix, Samsung Electronics — often gap in the same direction at the Korean open the following morning. index (+2.49%) and Nikkei 225 futures (+1.28% on CME) carried through into the open.Foreign investors were net buyers of ₩682.3bn on the Kospi through 09:52, with semiconductors and autos leading the advance; the Kosdaq opened higher but faded, with retail investors providing ₩171.1bn in net support.
10:00Snapshot
A window that records the market at that hour, like a photograph
Foreigners net buy ₩682.3bn on Kospi in the first hour; Kosdaq sees retail support but foreign selling
Top by trading value10— snapshot
A window on how the top trading-value names have moved up to this hour
SK hynix and Samsung Electro-Mechanics top Kospi turnover in a semiconductor-led open
Through 09:51, SK hynix led Kospi turnover at ₩1,726.2bn, having opened at ₩1,587,000 and reached an intraday high of ₩1,634,000 at 09:20 before pulling back; Samsung Electronics was second with ₩1,213.4bn in turnover, opening at ₩267,500 and hitting its session low of ₩262,500 at 09:45.Samsung Electro-Mechanics ranked third at ₩453.4bn and moved in a wide range of ₩1,412,000–₩1,519,000, while on the Kosdaq, K&S I&C led with ₩153.3bn in turnover and Jusung Engineering followed at ₩89.9bn.
| Stock | Prior close | Open | Opening GapThe difference between today’s opening price and the prior session’s closing price, expressed as a percentage; a gap up means the open is above the prior close.A large opening gap — driven by overnight moves in US or Japanese equities — often sets the tone for the first thirty minutes of Korean trading and determines whether early buyers or sellers dominate. | Last at 10:00 | High (time) | Low (time) |
|---|---|---|---|---|---|---|
| SK hynix | 1,504,019 | 1,582,000 | +5.18% | 1,604,000 (10:00) | 1,634,000 (09:20) | 1,567,000 (09:00) |
| Samsung Electronics | 255,510 | 267,500 | +4.69% | 264,250 (10:00) | 270,000 (09:05) | 264,250 (09:35) |
| Samsung Electro-Mechanics | 1,334,947 | 1,432,000 | +7.27% | 1,481,000 (10:00) | 1,519,000 (09:20) | 1,412,000 (09:00) |
| Samsung Electronics (Pref.) | 186,095 | 190,000 | +2.10% | 187,700 (10:00) | 191,000 (09:05) | 187,600 (09:30) |
| Kumho E&C | 14,930 | 15,900 | +6.50% | 16,630 (10:00) | 18,040 (09:05) | 15,370 (09:00) |
| SK Square | 1,023,973 | 1,101,000 | +7.52% | 1,095,000 (10:00) | 1,150,000 (09:05) | 1,082,000 (09:00) |
| Samwha Capacitor | 88,002 | 92,900 | +5.57% | 103,600 (10:00) | 107,400 (09:30) | 91,500 (09:00) |
| SK eternix | 52,701 | 54,000 | +2.46% | 55,550 (10:00) | 57,800 (09:15) | 53,200 (09:00) |
| Daewon Cable | 16,031 | 15,420 | −3.81% | 15,520 (10:00) | 15,970 (09:10) | 15,250 (09:00) |
| Korea Kolmar | 132,495 | 133,000 | +0.38% | 137,900 (10:00) | 144,000 (09:10) | 131,400 (09:00) |
Among the day’s notable intraday trajectories, Samhwa Capacitor (Kospi) did not reach its high of ₩107,400 until 09:31 — well after the initial open-gap rush had faded — while SK Square hit its high of ₩1,150,000 as early as 09:06 and has since traded back near its open of ₩1,105,000.Kumho Construction (Kospi) printed its high of ₩18,040 at 09:05 before retracing to around ₩16,350 — a pattern consistent with early speculative buying giving way to profit-taking in smaller-cap names within the first thirty minutes.
Gainers5· Decliners5— snapshot
A window on the biggest gainers and decliners, and the reasons behind them
Kospi breadth skews bullish at the open, but gains are concentrated in large-cap semiconductors
On the Kospi, the top gainers by percentage (among names with turnover above ₩100bn) were Kumho Electric (+30.0%), Samhwa Capacitor (+19.32%), Samsung Electro-Mechanics (+11.76%), and CS Wind (+10.96%); the sole notable decliner by turnover was Korea Electric Power (−4.80%), followed by Daewon Cable (−3.18%).On the Kosdaq, K&S I&C surged +96.36% to lead the market, with Mirae Asset Venture Investment (+18.69%) and PS Electronics (+16.18%) also advancing sharply, while JYP Entertainment (−7.39%) and Silicontu (−6.19%) led declines — suggesting the Kosdaq advance, where it occurred, was narrowly driven rather than broad.