In South Korea’s regular trading session on August 10, 2026, KOSDAQ surged 6.97%, far outpacing KOSPI’s 0.65% gain. KOSPI climbed as high as 6,394.06 points intraday but closed at 6,299.66 points. Among the stocks tracked, Hyundai Motor rose 3.16%, while Samsung Electronics and SK hynix fell 0.43% and 0.14%, respectively. Final investor-flow data showed foreign investors as net sellers of KRW 14,887 in hundred-million-won units, while retail and institutional investors were net buyers.
KOSDAQ Surges 6.97% as KOSPI’s Gain Remains Limited
| Index | August 10, 2026 Close | August 10, 2026 Change |
|---|---|---|
| KOSPI | 6,299.66 points | +40.89 points (+0.65%) |
| KOSDAQ | 854.47 points | +55.66 points (+6.97%) |
KOSPI closed the regular session on August 10, 2026, at 6,299.66 points, up 40.89 points, or 0.65%, from the previous trading day. It opened at 6,306.33 points, reached a high of 6,394.06 points, and fell to a low of 6,232.45 points. The close was 6.67 points below the open and 94.40 points below the high, but 67.21 points above the low. The gap between the high and low on August 10, 2026, was 161.61 points. The index climbed above 6,300 points intraday, but its regular-session close was 0.34 points below that level. KOSPI closing data
KOSDAQ ended the regular session on August 10, 2026, at 854.47 points, up 55.66 points, or 6.97%, from the previous trading day. Both the open and low were 807.66 points, while the high was 855.38 points. The close was 46.81 points above the open and low and 0.91 points below the high. The gap between the high and low on August 10, 2026, was 47.72 points. The close near the day’s high shows that most of KOSDAQ’s gain was maintained through the end of the regular session. KOSDAQ closing data
Both indexes advanced, but KOSDAQ’s gain on August 10, 2026, was 6.32 percentage points higher than KOSPI’s. The editorial interpretation based on closing data is that the day’s key market feature was not simply that both indexes rose, but KOSDAQ’s pronounced relative strength. However, the difference between the two indexes’ percentage changes alone cannot establish the cause of capital movements or the contribution of any particular sector.
Hyundai Motor Rises 3.16%, Leading the Tracked Stocks
Hyundai Motor closed the regular session on August 10, 2026, at KRW 408,000, up KRW 12,500, or 3.16%, from the previous trading day. It posted the strongest gain among the stocks tracked and outperformed KOSPI’s 0.65% increase that day by 2.51 percentage points. The stock opened at KRW 401,000, reached a high of KRW 410,500, and fell to a low of KRW 392,500, with trading volume of 720,572 shares. The close was KRW 7,000 above the open and KRW 2,500 below the high, placing it relatively close to the day’s high. Hyundai Motor closing data Previous analysis is available at the Hyundai Motor stock hub.
SK Square closed on August 10, 2026, at KRW 949,000, up KRW 10,000, or 1.06%, from the previous trading day. It opened at KRW 971,000, reached a high of KRW 977,000, and fell to a low of KRW 931,000, with trading volume of 570,902 shares. Although the stock finished higher, the close was KRW 22,000 below the open and KRW 18,000 above the low. Its August 10, 2026 gain was 0.41 percentage points higher than KOSPI’s but 5.91 percentage points lower than KOSDAQ’s. SK Square closing data Historical stock-specific coverage is available at the SK Square stock hub.
Hyundai Motor and SK Square both advanced, but their simultaneous gains do not provide a basis for concluding that they were driven by a common factor. In particular, Hyundai Motor closed above its opening price, while SK Square closed below its opening price, showing that their regular-session price paths differed despite both ending higher.
Samsung Electronics and SK hynix Diverge From the Rising Indexes
Samsung Electronics closed the regular session on August 10, 2026, at KRW 230,000, down KRW 1,000, or 0.43%, from the previous trading day. It opened at KRW 234,500, reached a high of KRW 238,500, and fell to a low of KRW 228,500, with trading volume of 25,077,953 shares. The close was KRW 4,500 below the open and KRW 1,500 above the low. Samsung Electronics moved in the opposite direction from KOSPI, which rose 0.65% on August 10, 2026. Samsung Electronics closing data Related analysis is compiled at the Samsung Electronics stock hub.
SK hynix ended the regular session on August 10, 2026, at KRW 1,420,000, down KRW 2,000, or 0.14%, from the previous trading day. It opened at KRW 1,450,000, reached a high of KRW 1,487,000, and fell to a low of KRW 1,397,000, with trading volume of 4,955,959 shares. The gap between the high and low was KRW 90,000, while the close was KRW 30,000 below the open and KRW 23,000 above the low. SK hynix closing data Previous coverage is available at the SK hynix stock hub.
The editorial interpretation based on closing prices is that the index gains on August 10, 2026, did not coincide with strength in the semiconductor stocks tracked. Samsung Electronics and SK hynix fell 0.43% and 0.14%, respectively, while KOSPI rose 0.65% and KOSDAQ climbed 6.97%. This is only a comparison of the stocks’ relative performance against the indexes; it does not establish the cause of the semiconductor stocks’ weakness or support a conclusion that other groups of stocks drove the index gains.
Retail and Institutional Investors Net Buy Amid Foreign Net Selling
In the final investor-flow data provided for August 10, 2026, foreign investors were net sellers of KRW 14,887 in hundred-million-won units. Retail investors were net buyers of KRW 9,003 in hundred-million-won units that day, while institutional investors were also net buyers of KRW 5,669 in hundred-million-won units. Because foreign net selling and gains in KOSPI and KOSDAQ occurred during the same regular session, the direction of the indexes and investor trading did not simply align that day. Investor flow data
Intraday reporting on August 10, 2026, cited foreign net selling as a factor limiting KOSPI’s gain at the time. This was the article’s intraday explanation and cannot be treated as the definitive cause of KOSPI’s final 0.65% gain on August 10, 2026. In addition, the intraday investor-flow figures in the article and the final totals released after the regular session refer to different points in time and should not be treated as identical values. Original intraday market report
A separate opening-market review published on August 10, 2026, presented easing concerns about interest-rate increases following weaker US employment data as part of the premarket backdrop. This was also the report’s interpretation and cannot be established as the direct cause of KOSDAQ’s 6.97% surge or Hyundai Motor’s 3.16% gain on August 10, 2026. Original opening-market review
Three Items to Check in the Next Regular Session
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Watch how KOSPI changes the 94.40-point gap between its August 10, 2026 close of 6,299.66 points and its intraday high of 6,394.06 points at the next regular-session close. For KOSDAQ, the August 10, 2026 close of 854.47 points and high of 855.38 points can serve as comparison levels.
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Check whether the relative gap between Hyundai Motor’s 3.16% gain on August 10, 2026, and the 0.43% and 0.14% declines in Samsung Electronics and SK hynix continues in the next regular session. This is a closing-price comparison and does not constitute a prediction of future direction or a trading judgment.
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Check how the direction of foreign net selling of KRW 14,887 in hundred-million-won units and retail and institutional net buying of KRW 9,003 and KRW 5,669 in hundred-million-won units on August 10, 2026, changes in the final data for the next regular session. Even if final investor flows and the indexes move in the same direction, that simultaneous movement alone cannot establish causation.