In the regular Korean market session on August 27, 2026, the KOSPI rose 1.53% to 6,912.37 points, while the KOSDAQ gained 1.30% to 837.65 points. Among the tracked stocks, SK hynix outperformed the index with a 2.49% gain, while Hyundai Motor fell 2.45%, closing opposite to the index direction. Apart from the overall result of higher indexes, closing levels relative to intraday highs and the directions of individual stock closes were not uniform.

Index August 27, 2026 regular-session close Change from previous trading day on August 27, 2026
KOSPI 6,912.37 points +104.16 points(+1.53%)
KOSDAQ 837.65 points +10.78 points(+1.30%)

KOSPI Regains the 6,900 Level, but Closes Below Its Intraday High

The KOSPI opened at 6,996.12 points on August 27, 2026, reached an intraday high of 6,996.12 points equal to its opening level, then recorded a low of 6,841.88 points and closed at 6,912.37 points. The close was 83.75 points below the intraday high and 70.49 points above the intraday low. Both the higher close from the previous trading day and the decline from the intraday high to the close were observed, but these figures alone cannot identify the cause of intraday trading. KOSPI closing data for August 27, 2026

The KOSDAQ opened at 828.42 points on August 27, 2026, reached an intraday high of 839.57 points and a low of 824.22 points, and closed at 837.65 points. The close was 9.23 points above the opening level and 1.92 points below the intraday high. Although both the KOSPI and KOSDAQ rose, closing data alone cannot establish which sector or investor group led the gains in the two indexes. KOSDAQ closing data for August 27, 2026

Clear Contrast Between SK hynix Strength and Hyundai Motor Weakness

SK hynix closed at 1,730,000 won on August 27, 2026, up 42,000 won(2.49%) from the previous trading day. Its gain was 0.96 percentage points higher than the KOSPI’s 1.53% increase on the same trading day. It recorded an opening price of 1,747,000 won, an intraday high of 1,790,000 won, an intraday low of 1,708,000 won, and trading volume of 5,454,542 shares, with the close 17,000 won below the opening price. Previous analysis is available through SK hynix closing data for August 27, 2026 and the SK hynix stock hub.

Hyundai Motor closed at 398,000 won on August 27, 2026, down 10,000 won(2.45%) from the previous trading day. It was a tracked stock that closed in the opposite direction on a day when the KOSPI gained 1.53%, with a gap of 3.98 percentage points versus the KOSPI’s gain. It opened at 412,000 won, reached an intraday high of 414,000 won and a low of 395,000 won, and traded 1,883,387 shares, with the close 14,000 won below the opening price. This is a comparison of relative performance based on closing prices, and the simultaneous occurrence of a KOSPI gain and a Hyundai Motor decline alone cannot establish a causal relationship. Hyundai Motor closing data for August 27, 2026 and the Hyundai Motor stock hub can be reviewed together.

Samsung Electronics and SK Square Also Close Below Their Opening Prices

Samsung Electronics closed at 266,000 won on August 27, 2026, up 4,500 won(1.72%) from the previous trading day. Its gain was 0.19 percentage points higher than the KOSPI’s 1.53% increase on the same trading day. However, it recorded an opening price of 269,000 won, an intraday high of 272,000 won, an intraday low of 262,500 won, and trading volume of 27,576,644 shares, leaving the close 3,000 won below the opening price and 6,000 won below the intraday high. Previous records for the individual stock are available through Samsung Electronics closing data for August 27, 2026 and the Samsung Electronics stock hub.

SK Square closed at 1,068,000 won on August 27, 2026, up 10,000 won(0.95%) from the previous trading day. Although it rose from the previous trading day, it was 25,000 won below the same day’s opening price of 1,093,000 won and 51,000 won below the intraday high of 1,119,000 won. Its intraday low was 1,050,000 won and trading volume was 676,826 shares. SK Square’s 0.95% gain was 0.58 percentage points lower than the KOSPI’s 1.53% increase on the same trading day. Previous analysis can be reviewed through SK Square closing data for August 27, 2026 and the SK Square stock hub.

Investor Flow Figures and Explanations in Articles Should Be Considered Separately

Investor-flow totals collected on August 27, 2026 were individuals -19,120억원, foreign investors +1,354억원, and institutions +1,814억원. By sign, individuals were net sellers, while foreign investors and institutions were net buyers. These investor-flow totals and the gains in the KOSPI and KOSDAQ were results from the same trading day, but the totals alone cannot establish that trading by a particular investor group caused the index gains or Hyundai Motor’s decline. Investor-flow data by investor type for August 27, 2026

The background explanations presented in news articles should be read separately from regular-session closing data. Yonhap News’s intraday outlook report cited reassurance over July PCE and strength in Nvidia’s after-hours trading as the background for expectations of semiconductor-led gains. This was the intraday interpretation presented by the report, and it cannot be verified from August 27, 2026 regular-session closing data alone or established as a direct cause. Original Yonhap News article

Naver Premium Content cited declining U.S. interest rates and oil prices, expectations for easing Middle East tensions, and strength in semiconductor stocks ahead of Nvidia’s earnings release as reasons behind the domestic stock market’s rebound on the previous day. Another Naver Premium Content article also presented expectations for further gains in semiconductor stocks based on Nvidia’s earnings announced after the close. Both are interpretations or outlooks from the respective articles and cannot be conclusively treated as causal explanations for Korean regular-session closing prices that day. Original investment strategy article Original pre-market news article

Three Items to Check in the Next Regular Session

  • For the KOSPI, the next regular-session closing trend can be assessed against the August 27, 2026 close of 6,912.37 points and intraday high of 6,996.12 points; for the KOSDAQ, against the close of 837.65 points and intraday high of 839.57 points.

  • For tracked stocks, changes in the next regular session can be observed relative to the August 27, 2026 moves of Samsung Electronics +1.72%, SK hynix +2.49%, Hyundai Motor -2.45%, and SK Square +0.95%. 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 -19,120억원, foreign investors +1,354억원, and institutions +1,814억원 on August 27, 2026 continue in the next regular-session totals. Investor flows and prices should be considered together, but a causal relationship cannot be established from figures for a single trading day alone.