During regular trading in the Korean market (09:00~15:30) on September 3, 2026, the KOSPI rose 16.76 points (0.26%) from the previous trading day to 6,579.48 points, while the KOSDAQ fell 13.77 points (-1.71%) to 790.21 points. Among the tracked stocks, Hyundai Motor rose, but Samsung Electronics, SK hynix, and SK Square closed below the previous trading day’s levels, showing both a divergence between the indices and stock-specific differentiation.

Index September 3, 2026 Regular-Session Close Change From Previous Trading Day
KOSPI 6,579.48 points +16.76 points (+0.26%)
KOSDAQ 790.21 points -13.77 points (-1.71%)

KOSPI Rebounded but Remained Below Its Intraday High

The KOSPI opened at 6,650.33 points during regular trading on September 3, 2026, rose as high as 6,682.97 points intraday, and reached an intraday low of 6,439.49 points. It closed at 6,579.48 points, 70.85 points below the opening level but 0.26% above the previous trading day’s close. These figures show the relationship between the regular-session close and intraday prices; intraday movement alone cannot determine the reason for the closing direction. KOSPI closing data for September 3, 2026

The KOSDAQ opened at 814.31 points on September 3, 2026, recorded an intraday high of 815.79 points and an intraday low of 782.87 points, then closed at 790.21 points. The close was 24.10 points below the opening level, and its -1.71% change from the previous trading day moved in the opposite direction from the KOSPI’s +0.26% on the same day. KOSDAQ closing data for September 3, 2026

Hyundai Motor Rose While Semiconductor Stocks Were Weak

Hyundai Motor closed at KRW 383,500 on September 3, 2026, up KRW 5,500 (+1.46%) from the previous trading day. It was the only tracked stock to close higher, with an opening price of KRW 378,500, an intraday high of KRW 387,000, an intraday low of KRW 374,500, and volume of 734,189 shares. It can be confirmed that Hyundai Motor’s gain exceeded the KOSPI’s 0.26% rise on the same trading day, but this simultaneous movement alone cannot determine the cause of the index’s move. Hyundai Motor closing data for September 3, 2026 and the Hyundai Motor stock hub offer further historical analysis.

SK hynix fell KRW 17,000 (-1.05%) to KRW 1,596,000 on September 3, 2026. It opened at KRW 1,615,000, reached an intraday high of KRW 1,649,000 and an intraday low of KRW 1,558,000, and traded 3,818,608 shares. Its close was KRW 38,000 above the intraday low. SK hynix closing data for September 3, 2026 and the SK hynix stock hub allow comparison of closing-price trends.

Samsung Electronics fell KRW 500 (-0.20%) to KRW 250,000 on September 3, 2026, with volume of 19,898,247 shares. After opening at KRW 252,000, reaching an intraday high of KRW 255,500, and falling to an intraday low of KRW 243,000, it closed below the previous trading day’s close. Samsung Electronics closing data for September 3, 2026 and the Samsung Electronics stock hub provide previous analysis.

SK Square fell KRW 1,000 (-0.10%) to KRW 981,000 on September 3, 2026. It opened at KRW 1,002,000, reached an intraday high of KRW 1,006,000 and an intraday low of KRW 947,000, and traded 487,806 shares. Its close was KRW 34,000 above the intraday low. SK Square closing data for September 3, 2026 and the SK Square stock hub offer further historical stock-price trends.

Supply-and-Demand Figures and Early-Session Reports Should Be Interpreted Separately

Investor flow data for September 3, 2026 listed individuals at -9,552억원, foreign investors at -4,232억원, and institutions at -2,153억원. During the same regular session, the KOSPI closed +0.26% and the KOSDAQ closed -1.71%; however, the fact that investor-specific net trading and closing prices were observed on the same trading day alone does not support a conclusion that any group’s trading directly caused the closing direction of the indices or individual stocks. Investor trading data for September 3, 2026

Regarding the early-session movement, a Yonhap News report cited the rebound in U.S. equities as the backdrop for the KOSPI’s modest rise and said selling by foreign investors and institutions appeared to limit the gain. This is an interpretation contained in an intraday article, and the regular-session closing figures for September 3, 2026 do not themselves establish causation. Original Yonhap News article A separate Yonhap News report said that the New York stock market rebounded after four trading days amid an adjustment in Treasury yields. Original article on the New York stock market

Three Items to Check in the Next Regular Session

  • For the KOSPI, the next regular-session close can be compared with the September 3, 2026 close of 6,579.48 points and intraday low of 6,439.49 points. For the KOSDAQ, it can be compared with the close of 790.21 points and intraday low of 782.87 points.

  • For the tracked stocks, the next regular session can be used to check how the September 3, 2026 changes—Hyundai Motor +1.46%, SK hynix -1.05%, Samsung Electronics -0.20%, and SK Square -0.10%—differ from the KOSPI and KOSDAQ movements.

  • Investor flow data for September 3, 2026—individuals -9,552억원, foreign investors -4,232억원, and institutions -2,153억원—can be compared with the next regular-session figures. Supply-and-demand data and closing prices should be considered together, while avoiding the assumption that simultaneous changes on a single trading day establish causation.