In the Korean market’s regular session (09:00–15:30) on August 26, 2026, the KOSPI closed 0.97% higher at 6,808.21 points, while the KOSDAQ closed 0.03% lower at 826.87 points. Among the tracked stocks, Samsung Electronics rose 1.75%, but Hyundai Motor fell 3.09%, so the index gain and individual stock closing directions did not align.

KOSPI Holds Above 6,800, While KOSDAQ Edges Lower

Index Regular-session close, August 26, 2026 Change from previous trading day
KOSPI 6,808.21 points +65.47 points (+0.97%)
KOSDAQ 826.87 points -0.28 points (-0.03%)

The KOSPI opened at 6,727.25 points on August 26, 2026, traded within an intraday range of 6,704.10–6,887.18 points, and ended the regular session at 6,808.21 points. The close was 80.96 points above the opening level on the same trading day and 78.97 points below the intraday high. KOSPI closing data for August 26, 2026

The KOSDAQ opened at 824.77 points on the same trading day, reached an intraday low of 815.53 points and a high of 832.21 points, and closed at 826.87 points. The close was 2.10 points above the opening level, but 0.28 points (0.03%) below the previous trading day. KOSDAQ closing data for August 26, 2026

At the close, the KOSPI and KOSDAQ moved in different directions. Their simultaneous movements only reflect the outcome of the August 26, 2026 regular session and do not establish a causal relationship showing that a specific sector, stock, or investor group drove the index moves.

Diverging Stock Performance: Samsung Electronics Rises, Hyundai Motor Falls

Samsung Electronics closed at 261,500 won on August 26, 2026, up 4,500 won (1.75%) from the previous trading day. It also opened at 261,500 won and recorded an intraday high of 266,500 won, a low of 255,500 won, and trading volume of 28,302,645 shares. Samsung Electronics’ gain was 0.78 percentage points higher than the KOSPI’s 0.97% rise on the same trading day. Historical analysis is available through Samsung Electronics closing data for August 26, 2026 and the Samsung Electronics stock hub.

By contrast, Hyundai Motor ended the regular session at 408,000 won on August 26, 2026, down 13,000 won (3.09%) from the previous trading day. It opened at 425,000 won, reached a high of 434,000 won and a low of 406,500 won, and traded 1,668,374 shares. The close was 17,000 won below the opening level on the same trading day. Hyundai Motor’s more than 3% decline on a day when the KOSPI rose was the clearest opposite-direction close among the tracked stocks. Hyundai Motor closing data for August 26, 2026 and the Hyundai Motor stock hub can be viewed together.

SK Hynix Closes Higher, While SK Square Remains Weak

SK Hynix closed at 1,688,000 won on August 26, 2026, up 10,000 won (0.60%) from the previous trading day. It opened at 1,713,000 won, reached a high of 1,735,000 won and a low of 1,662,000 won, and traded 4,661,473 shares. Although the close was higher than the previous trading day, it was 25,000 won below the opening level and 47,000 won below the intraday high on the same trading day. Previous records for the individual stock are available through SK Hynix closing data for August 26, 2026 and the SK Hynix stock hub.

SK Square closed at 1,058,000 won on August 26, 2026, down 2,000 won (0.19%) from the previous trading day. Both its opening price and intraday high were 1,088,000 won, its intraday low was 1,027,000 won, and trading volume was 645,794 shares. It posted a modest decline on a day when the index rose, while the difference between its intraday high and low was 61,000 won. Historical analysis is also available through SK Square closing data for August 26, 2026 and the SK Square stock hub.

In the editor’s interpretation, the tracked stocks on August 26, 2026 were split between gains in Samsung Electronics and SK Hynix and declines in Hyundai Motor and SK Square. This summarizes the relative performance of their closing prices and does not establish that gains in semiconductor stocks alone caused the KOSPI’s advance or that Hyundai Motor’s decline resulted from a specific market variable.

Investor Flow Figures and Reported Market Context Should Be Distinguished

Investor-flow data collected on August 26, 2026 showed individuals at -22,414억원, foreign investors at -1,162억원, and institutions at +7,594억원. By sign, individuals and foreign investors were net sellers, while institutions were net buyers. Investor flow data for August 26, 2026

The investor-flow directions and the KOSPI’s 0.97% gain were both observed on the same trading day. These figures alone do not support a conclusion that institutional net buying caused the KOSPI to rise or that net selling by foreign and individual investors caused declines in specific stocks.

The context presented in news reports should be considered separately from closing data. A Yonhap News intraday report mentioned continued net selling by foreign investors in the KOSPI market, while a NewsPim opening report cited simultaneous net selling by foreign investors and institutions as the backdrop for the lower opening. These were intraday interpretations from the respective reports and cannot be established as direct causes of the final regular-session close. Yonhap News article NewsPim article

An Investing.com opening report cited falling international oil prices and a technical rebound in semiconductor stocks as the backdrop for overseas market trends, while Naver Premium content mentioned bargain buying in semiconductor stocks and the KOSPI recovering its losses. A Daum report also described the market as an index rebound despite foreign selling. These are interpretations presented by the reports, and the August 26, 2026 Korean regular-session close alone cannot verify those explanations or establish them as causal relationships. Investing.com article Naver Premium article Daum article

Three Items to Watch in the Next Regular Session

  • For the KOSPI, the August 26, 2026 close of 6,808.21 points and intraday high of 6,887.18 points, and for the KOSDAQ, the close of 826.87 points and intraday high of 832.21 points, can serve as reference points for the next regular session’s closing trend.

  • Among the tracked stocks, it is worth observing how the relative moves of Samsung Electronics +1.75%, SK Hynix +0.60%, Hyundai Motor -3.09%, and SK Square -0.19% on August 26, 2026 change in the next regular session. These are observation reference points only and do not indicate the direction of the next trading day.

  • It can be checked whether the investor-flow directions of individuals -22,414억원, foreign investors -1,162억원, and institutions +7,594억원 on August 26, 2026 continue in the next regular-session tally. Investor flows and prices should be considered together, but a single trading-day tally cannot establish causality.