During the regular Korean market session (09:00–15:30) on September 2, 2026, the KOSPI fell 273.08 points (-3.99%) from the previous trading day to close at 6,562.72 points, while the KOSDAQ also declined 17.27 points (-2.10%) to 803.98 points. All four tracked stocks fell, with SK Square (-7.97%) and Hyundai Motor (-5.62%) posting steeper declines than the KOSPI.

Index September 2, 2026 regular-session close Change from previous trading day
KOSPI 6,562.72 points -273.08 points (-3.99%)
KOSDAQ 803.98 points -17.27 points (-2.10%)

KOSPI Slips to the 6,562 Level as KOSDAQ Also Falls

The KOSPI opened at 6,625.47 points during the regular session on September 2, 2026, rose as high as 6,694.57 points intraday, but closed at 6,562.72 points, near its intraday low of 6,558.30 points. The close was 4.42 points above the intraday low and 131.85 points below the intraday high. This indicates the position of the regular-session close; the cause of the decline cannot be determined from intraday movement alone. KOSPI closing data for September 2, 2026

The KOSDAQ opened at 802.80 points on September 2, 2026, recorded an intraday high of 819.62 points and a low of 796.34 points, then closed at 803.98 points. The close was 1.18 points above the open but was down -2.10% from the previous trading day. Its decline was smaller than that of the KOSPI, but both indexes ended lower on a regular-session closing basis. KOSDAQ closing data for September 2, 2026

SK Square and Hyundai Motor Fell More Than the Index

SK Square closed at 982,000 won on September 2, 2026, down 85,000 won (-7.97%) from the previous trading day. It posted the largest decline among the tracked stocks, 3.98 percentage points below the KOSPI’s -3.99% on the same trading day. It recorded an open of 1,020,000 won, an intraday high of 1,031,000 won, an intraday low of 982,000 won, and trading volume of 708,657 shares, with the close matching the intraday low. Earlier analysis is available through SK Square closing data for September 2, 2026 and the SK Square stock hub.

Hyundai Motor fell 22,500 won (-5.62%) from the previous trading day to 378,000 won on September 2, 2026. The difference in its decline rate versus the KOSPI was -1.63 percentage points. Its open and intraday high were both 396,000 won, its intraday low was 376,000 won, and its trading volume was 1,273,900 shares; the close was 2,000 won above the intraday low. Hyundai Motor closing data for September 2, 2026 and the Hyundai Motor stock hub can be reviewed together.

SK Hynix fell 80,000 won (-4.73%) to 1,613,000 won on September 2, 2026, while Samsung Electronics declined 10,500 won (-4.02%) to 250,500 won. Both stocks posted declines smaller than the KOSPI’s decline rate, with trading volume of 3,605,177 shares for SK Hynix and 21,826,773 shares for Samsung Electronics. The relative price movements on the same day alone cannot establish that the two stocks’ moves caused the index decline. Historical trends can be reviewed through SK Hynix closing data for September 2, 2026, the SK Hynix stock hub, Samsung Electronics closing data for September 2, 2026, and the Samsung Electronics stock hub.

Retail Net Buying and Foreign and Institutional Net Selling Are Separate From News Interpretations

Investor-flow data for September 2, 2026 listed retail investors at +23,028 hundred million won, foreign investors at -19,095 hundred million won, and institutions at -20,438 hundred million won. On a day when retail investors were recorded as net buyers and foreign investors and institutions as net sellers, the KOSPI showed a regular-session closing change of -3.99% and the KOSDAQ of -2.10%. However, observing investor flows and closing prices together on the same trading day alone does not support a conclusion that trading by a particular investor group directly determined the closing direction of an index or individual stock. Investor-flow data by investor type for September 2, 2026

Regarding the backdrop to the regular-session movement, a Yonhap News report cited continued Middle East tensions and US stock-market trends in its headline as factors behind the KOSPI’s direction. A Seoul Data Lab report also summarized that weakness in technology and semiconductor stocks led declines in the New York market the previous day, while an Investing.com article headline addressed surging oil prices and inflation concerns following the resumption of armed conflict involving Iran. These are market interpretations presented by the respective articles and cannot be confirmed as direct causation based on Korean regular-session closing data for September 2, 2026 alone. Yonhap News article Seoul Data Lab article Oil-price and inflation article

Three Items to Check in the Next Regular Session

  • For the KOSPI, the next regular-session close can be compared with the September 2, 2026 close of 6,562.72 points and intraday low of 6,558.30 points. For the KOSDAQ, it can be compared with the close of 803.98 points and intraday low of 796.34 points. These are observation benchmarks, not directional forecasts.

  • For the tracked stocks, the September 2, 2026 changes of SK Square -7.97%, Hyundai Motor -5.62%, SK Hynix -4.73%, and Samsung Electronics -4.02% can be compared with the KOSPI’s -3.99% to assess the gap.

  • Investor flows of retail investors +23,028 hundred million won, foreign investors -19,095 hundred million won, and institutions -20,438 hundred million won on September 2, 2026 can be compared with the next regular-session data. Changes in investor flows and closing direction should be considered together, while recognizing that a single trading day’s figures cannot establish causation.