In South Korea’s regular market session (09:00–15:30) on September 22, 2026, the KOSPI closed up 10.19 points (0.15%) at 7,017.91 points, while the KOSDAQ closed down 1.89 points (0.23%) at 834.38 points. Among the tracked stocks, Samsung Electronics and Hyundai Motor rose, while SK hynix moved against the KOSPI’s advance, falling 1.61%, highlighting a divergence in closing performance.

Index September 22, 2026 regular-session close Change from previous session September 22, 2026 regular-session high·low
KOSPI 7,017.91 points +10.19 points (+0.15%) 7,171.44 points·6,986.27 points
KOSDAQ 834.38 points -1.89 points (-0.23%) 847.10 points·831.13 points

KOSPI Ends at 7,017.91 Points After an Intraday High Above 7,100

The KOSPI opened at 7,161.61 points in the regular session on September 22, 2026, rose as high as 7,171.44 points intraday, then moved through a low of 6,986.27 points before closing at 7,017.91 points. The close was 10.19 points (0.15%) higher than the previous session, but 153.53 points below the intraday high. KOSPI regular-session closing data

The KOSDAQ opened at 846.14 points on September 22, 2026, recorded an intraday high of 847.10 points and a low of 831.13 points, then ended the regular session at 834.38 points. While the KOSPI rose 0.15%, the KOSDAQ fell 0.23%, leaving the two indexes with opposite closing directions. However, the same-day closing moves alone cannot establish capital flows or their causes between large-cap stocks and the KOSDAQ market. KOSDAQ regular-session closing data

An early-session Yonhap News report cited strength in U.S. equities as the backdrop for the KOSPI’s gain of more than 2%, while a Chosun Biz report described the Nasdaq reaching a record high and the KOSPI moving above 7,100 as intraday developments. These are the interpretations and intraday figures presented by the respective reports and should be distinguished from the fact that the regular session ultimately closed with a 0.15% gain. Original Yonhap News intraday article Original Chosun Biz intraday article

Samsung Electronics Rises, While SK hynix Falls 30,000 Won

Samsung Electronics closed at 275,500 won on September 22, 2026, up 1,500 won (0.55%). It recorded an opening price of 279,000 won, an intraday high of 283,500 won, a low of 274,000 won, and trading volume of 28,061,191 shares. Samsung Electronics’ 0.55% gain was 0.40 percentage points higher than the KOSPI’s 0.15% increase on the same trading day. Historical analysis is available through Samsung Electronics closing data and the Samsung Electronics stock hub.

By contrast, SK hynix closed at 1,838,000 won on September 22, 2026, down 30,000 won (1.61%). It recorded an opening price of 1,905,000 won, an intraday high of 1,935,000 won, a low of 1,818,000 won, and trading volume of 4,747,655 shares. On a day when the KOSPI rose 0.15%, SK hynix’s closing change was 1.76 percentage points lower and was the largest decline among the four tracked stocks. Price differences alone cannot explain the individual closing directions of the two stocks. See SK hynix closing data and the SK hynix stock hub.

Hyundai Motor Posts a Near-Flat Gain, While SK Square Edges Higher

Hyundai Motor closed at 360,500 won on September 22, 2026, up 1,500 won (0.42%). It recorded an opening price of 362,000 won, an intraday high of 370,000 won, a low of 360,000 won, and trading volume of 798,807 shares. Its closing gain was 0.27 percentage points higher than the KOSPI’s, and the closing price itself was 500 won above the intraday low. Related records are available through Hyundai Motor closing data and the Hyundai Motor stock hub.

SK Square closed at 1,128,000 won on September 22, 2026, up 1,000 won (0.09%). It recorded an opening price of 1,146,000 won, an intraday high of 1,189,000 won, a low of 1,119,000 won, and trading volume of 741,957 shares. The 0.09% gain was 0.06 percentage points smaller than the KOSPI’s 0.15% increase, while the difference between the intraday high and the close was 61,000 won. These closing and intraday-range figures are verifiable price facts, but they do not indicate corporate value or the direction of the next trading day. Historical analysis is available through SK Square closing data and the SK Square stock hub.

Review Investor Flow Figures and Intraday Reports by Their Reference Times

Investor net-buying figures for September 22, 2026 were individuals -15,856억원, foreigners +590억원, and institutions -1,261억원. Individuals and institutions were recorded as net sellers, while foreigners were recorded as net buyers. These flow figures can be viewed alongside the same-day regular-session closes of KOSPI +0.15% and KOSDAQ -0.23%, but one trading day’s net buying and index movements cannot establish that trading by a particular investor group directly caused index movements. Investor flow data for September 22, 2026

The collected Yonhap News and Chosun Biz articles said that individuals were net buyers in the KOSDAQ early in the session, while foreigners and institutions had a selling bias. The reports presented this as background for the intraday index movement at the time, but investor-flow figures as of the regular-session close and intraday article figures may differ in reference time and market coverage, so they cannot substitute for one another. Original Yonhap News intraday investor-flow article Original Chosun Biz intraday investor-flow article

Three Items to Check in the Next Regular Session

  • Compare the September 22, 2026 KOSPI close of 7,017.91 points with the next regular-session close to see where it stands relative to the intraday high of 7,171.44 points and low of 6,986.27 points. KOSPI data

  • Check whether the divergent directions of the September 22, 2026 KOSDAQ close of 834.38 points and KOSPI close of 7,017.91 points continue in the next regular session. KOSDAQ data

  • Review the next regular-session figures alongside the tracked stocks’ September 22, 2026 closing changes of Samsung Electronics +0.55%, SK hynix -1.61%, Hyundai Motor +0.42%, and SK Square +0.09%, as well as net-buying figures of individuals -15,856억원, foreigners +590억원, and institutions -1,261억원. Investor flow data