In South Korea’s regular market session (09:00–15:30) on September 10, 2026, the KOSPI fell 0.25% to 7,033.92 points, while the KOSDAQ rose 0.79% to 836.92 points. Of the four tracked stocks, only Hyundai Motor rose, while Samsung Electronics, SK hynix, and SK Square all posted modest declines, resulting in divergent closing directions across the two indexes.

Index September 10, 2026 regular-session close Change from previous trading day September 10, 2026 regular-session high·low
KOSPI 7,033.92 points -17.72 points(-0.25%) 7,072.79 points·6,898.45 points
KOSDAQ 836.92 points +6.55 points(+0.79%) 839.05 points·813.66 points

Different Closing Paths for the KOSPI, Which Held 7,000, and the Rebounding KOSDAQ

The KOSPI opened at 7,038.85 points in the September 10, 2026 regular session, reached an intraday high of 7,072.79 points and a low of 6,898.45 points, then closed at 7,033.92 points. The change from the previous trading day was -17.72 points(-0.25%). Although there was a gap between the intraday low and the close, price movement alone cannot identify the buyers and sellers or the reason for the decline. KOSPI closing data

On the same day, September 10, 2026, the KOSDAQ opened at 825.06 points, fell to 813.66 points intraday, then rose to 839.05 points before ending the regular session at 836.92 points. It gained +6.55 points(+0.79%) from the previous trading day, moving in a different closing direction from the KOSPI’s -0.25%. The simultaneous movements of the two indexes are observable, but this comparison alone cannot conclusively determine sector-level fund flows or their causes within the market. KOSDAQ closing data

Hyundai Motor Alone Rises as Large-Cap Semiconductor Stocks Edge Lower

Hyundai Motor closed at 389,000 won on September 10, 2026, up 1,000 won(+0.26%) from the previous trading day. It recorded an opening price of 384,500 won, an intraday high of 392,000 won, an intraday low of 381,500 won, and trading volume of 801,050 shares. It was the only tracked stock to close higher and moved in the opposite direction from the KOSPI on a day when the index closed at -0.25%. However, the closing difference alone cannot establish the reason for Hyundai Motor’s gain. Historical analysis is available through Hyundai Motor closing data and the Hyundai Motor stock hub.

Samsung Electronics fell 500 won(-0.19%) to 269,000 won on September 10, 2026. Its opening price was 268,000 won, intraday high was 272,000 won, intraday low was 263,500 won, and trading volume was 28,440,374 shares. Its decline was smaller than the KOSPI’s -0.25% on the same trading day, but its closing direction differed from the KOSDAQ’s +0.79% gain. See Samsung Electronics closing data and the Samsung Electronics stock hub.

SK hynix fell 3,000 won(-0.16%) to 1,853,000 won on September 10, 2026. It recorded an opening price of 1,878,000 won, an intraday high of 1,909,000 won, an intraday low of 1,811,000 won, and trading volume of 6,477,940 shares. The day’s intraday price range and the -0.16% closing change are observable, but the close alone cannot be used to generalize the broader semiconductor sector’s direction or the background behind an individual company’s price movement. Related analysis is available through SK hynix closing data and the SK hynix stock hub.

SK Square closed at 1,135,000 won on September 10, 2026, down 3,000 won(-0.26%). Its opening price was 1,151,000 won, intraday high was 1,162,000 won, intraday low was 1,095,000 won, and trading volume was 735,779 shares. It posted the largest closing decline among the four tracked stocks, with a decline rate nearly equal to the KOSPI’s -0.25%. Historical analysis is available through SK Square closing data and the SK Square stock hub.

Investor-Flow Figures and Market Reports Should Be Read Separately

Collected investor net-buying and net-selling figures for September 10, 2026 were individuals +3,803억원, foreigners -24,807억원, and institutions +4,334억원. Foreign investors were recorded as net sellers, while individuals and institutions were recorded as net buyers. These are investor-flow records for that trading day and do not establish that trading by any one investor group explains the KOSPI’s -17.72 points(-0.25%) or the KOSDAQ’s +6.55 points(+0.79%) closing direction. September 10, 2026 investor-flow data

A pre-opening market report by Yonhap News Agency on September 10, 2026 cited the continued performance of U.S. technology stocks and the possibility of upward pressure centered on semiconductor shares, while also mentioning the burden of a sharp rise in U.S. Treasury yields and higher oil prices. This reflects the market interpretation presented in the report; the day’s regular-session closing data alone cannot confirm that this explanation was a direct cause of the KOSPI’s decline or the KOSDAQ’s rise. Yonhap News Agency market report

A report published before the market opened on the same date mentioned oil-price- and interest-rate-related burdens in the context of the KOSPI’s recovery of 7,000 points. This content should likewise be viewed separately as the report’s interpretation and the prior day’s market context, rather than combined with the September 10, 2026 15:30 regular-session closing data as a causal relationship. Daum article

Three Items to Check in the Next Regular Session

  • The KOSPI’s September 10, 2026 close of 7,033.92 points and intraday high·low of 7,072.79 points·6,898.45 points, as well as the KOSDAQ’s close of 836.92 points and intraday high·low of 839.05 points·813.66 points, can be compared with the next regular session’s closing levels and intraday ranges. KOSPI data KOSDAQ data

  • For the tracked stocks, September 10, 2026 closing changes were Hyundai Motor +0.26%, Samsung Electronics -0.19%, SK hynix -0.16%, and SK Square -0.26%; whether these show a different pattern from index movements in the next regular session is an item to check.

  • Investor net buying and selling for September 10, 2026—individuals +3,803억원, foreigners -24,807억원, and institutions +4,334억원—can be compared with the next regular-session figures. Investor flows and prices should be reviewed together, while avoiding an interpretation that treats simultaneous changes on a single trading day as cause and effect. Investor-flow data