In the Korean market’s regular session (09:00~15:30) on August 25, 2026, the KOSPI closed up 0.68% at 6,742.74 points, while the KOSDAQ closed up 1.70% at 827.15 points. Among the tracked stocks, Hyundai Motor rose 1.69%, slightly outpacing the index gain, while SK Square fell 1.49%, closing in the opposite direction.

KOSPI at 6,742 and KOSDAQ at 827 Close Higher After Intraday Lows

Index August 25, 2026 regular-session close Change from previous trading day on August 25, 2026
KOSPI 6,742.74 points +45.78 points (+0.68%)
KOSDAQ 827.15 points +13.82 points (+1.70%)

The KOSPI opened at 6,535.93 points on August 25, 2026, moved through an intraday low of 6,408.82 points and a high of 6,747.16 points, and ended the regular session at 6,742.74 points. The close was 206.81 points above the same-day open and 4.42 points below the intraday high. KOSPI closing data for August 25, 2026

The KOSDAQ opened at 806.93 points on August 25, 2026, recorded an intraday low of 781.89 points, and closed at 827.15 points, matching its intraday high. The close was 20.22 points above the same-day open. KOSDAQ closing data for August 25, 2026

Closing data show that both indices rose in the same direction, with the KOSDAQ’s August 25, 2026 gain exceeding the KOSPI’s by 1.02 percentage points. This is a comparison of regular-session results; the difference in index returns alone does not establish that a particular sector or investor group caused the move.

Hyundai Motor Outperformed the Index, While SK Square Closed in the Opposite Direction

Hyundai Motor ended the regular session on August 25, 2026, at 421,000 won, up 7,000 won (1.69%) from the previous trading day. It opened at 415,000 won, reached a high of 437,000 won and a low of 406,000 won, and traded 1,230,740 shares. The close was 6,000 won above the same-day open but 16,000 won below the intraday high. Its 1.69% gain was 1.01 percentage points higher than the KOSPI’s 0.68% gain on the same trading day. See Hyundai Motor closing data for August 25, 2026 and the Hyundai Motor stock hub for previous analysis.

SK Square closed at 1,060,000 won on August 25, 2026, down 16,000 won (1.49%) from the previous trading day. Its open and high were both 1,069,000 won, its low was 999,000 won, and volume was 676,242 shares. The close was 9,000 won below the same-day open but 61,000 won above the intraday low. The distinction in closing performance was that SK Square ended lower on a trading day when the KOSPI and KOSDAQ both rose. See SK Square closing data for August 25, 2026 and the SK Square stock hub.

Samsung Electronics Was Unchanged; SK Hynix Rose 0.42%

Samsung Electronics closed unchanged at 257,000 won on August 25, 2026. It opened at 254,500 won, reached a high of 258,000 won and a low of 245,000 won, and recorded volume of 34,106,289 shares. The close was 2,500 won above the same-day open and 1,000 won below the intraday high. This confirms that Samsung Electronics’ change from the previous trading day was 0.00%, even as the indices rose. See Samsung Electronics closing data for August 25, 2026 and the Samsung Electronics stock hub for individual-stock records.

SK Hynix ended the regular session on August 25, 2026, at 1,678,000 won, up 7,000 won (0.42%) from the previous trading day. It opened at 1,653,000 won, reached a high of 1,687,000 won and a low of 1,557,000 won, and traded 6,165,185 shares. The close was 25,000 won above the same-day open and 121,000 won above the intraday low. However, its 0.42% gain fell short of the KOSPI’s 0.68% gain and the KOSDAQ’s 1.70% gain on the same trading day. See SK Hynix closing data for August 25, 2026 and the SK Hynix stock hub for previous analysis.

In the editor’s interpretation, the four tracked stocks showed divergent closing directions that day: Hyundai Motor rose, SK Square fell, Samsung Electronics was unchanged, and SK Hynix rose modestly. These simultaneous movements show relative performance only and do not mean that the move in any one stock caused index changes.

Foreign Net Selling and Pre-Market Reports Should Be Viewed Separately

Collected investor-flow figures for August 25, 2026 were individuals +10,516 hundred million won, foreign investors -38,143 hundred million won, and institutions +11,708 hundred million won. By sign, individuals and institutions were net buyers, while foreign investors were net sellers. Investor-flow data for August 25, 2026

Investor-flow figures and index closes can be observed together, but the fact that foreign net selling and gains in the KOSPI and KOSDAQ occurred simultaneously on August 25, 2026 does not by itself establish that investor flows caused the index moves. This is the editor’s interpretation of the closing data.

A collected pre-market Yonhap News article cited the possibility of bargain buying after the KOSPI’s sharp decline on the previous trading day as background. Another pre-market report cited Nvidia’s notice of AI chip price increases as context for reviewing overseas markets, while Yonhap News’ global market-close article reported mixed overnight trading in New York. These are interpretations and pre-market information presented by the respective reports and cannot be confirmed as the direct causes of the Korean regular-session close on August 25, 2026. Yonhap News pre-market article Investing.com pre-market article Yonhap News global market-close article

Three Items to Check in the Next Regular Session

  • For the KOSPI, the next regular-session closing trend can be checked against the August 25, 2026 close of 6,742.74 points and intraday high of 6,747.16 points. For the KOSDAQ, the close and intraday high were both 827.15 points.

  • For the tracked stocks, it is possible to observe how the relative changes of Hyundai Motor +1.69%, SK Square -1.49%, Samsung Electronics 0.00%, and SK Hynix +0.42% on August 25, 2026 change in the next regular session. These are observation benchmarks only and do not indicate the direction of the next trading day.

  • It is necessary to check whether the investor-flow directions of individuals +10,516 hundred million won, foreign investors -38,143 hundred million won, and institutions +11,708 hundred million won on August 25, 2026 continue in the next regular-session figures. Investor flows and prices should be considered together, but a single trading day’s figures cannot establish causality.