In Korea’s regular market session (09:00–15:30) on September 9, 2026, the KOSPI closed higher at 7,051.64 points and the KOSDAQ also finished higher at 830.37 points. The KOSDAQ’s gain of +2.28% on September 9, 2026 exceeded the KOSPI’s +1.40%, while SK hynix recorded the largest gain among the tracked stocks at +3.51%.

Index September 9, 2026 regular-session close Change from previous trading day September 9, 2026 intraday high·low
KOSPI 7,051.64 points +97.12 points(+1.40%) 7,112.48 points·6,968.06 points
KOSDAQ 830.37 points +18.49 points(+2.28%) 830.87 points·814.79 points

KOSPI Closes at 7,051.64 Points and KOSDAQ at 830.37 Points

The KOSPI opened at 6,972.87 points in the regular session on September 9, 2026, rose as high as 7,112.48 points intraday, and closed at 7,051.64 points. Its intraday low was 6,968.06 points, and it gained +97.12 points(+1.40%) from the previous trading day. These figures record the September 9, 2026 regular-session close and intraday range; they alone cannot identify the reason for the gain. KOSPI closing data

The KOSDAQ began September 9, 2026 at 815.06 points, rose to 830.87 points, and ended the regular session at 830.37 points. Its intraday low was 814.79 points, while its change from the previous trading day was +18.49 points(+2.28%). The KOSDAQ’s +2.28% was a larger gain than the KOSPI’s +1.40% on the same trading day. KOSDAQ closing data

SK hynix Strength Contrasts With Samsung Electronics’ Flat Close

SK hynix closed at 1,856,000 won on September 9, 2026, up 63,000 won(+3.51%) from the previous trading day. It opened at 1,803,000 won, reached an intraday high of 1,883,000 won and an intraday low of 1,795,000 won, with volume of 5,406,135 shares. Its +3.51% gain exceeded the gains of both the KOSPI and KOSDAQ that day. Past analysis is available through SK hynix closing data and the SK hynix stock hub.

Samsung Electronics closed unchanged at 269,500 won on September 9, 2026, a 0 won(0.00%) change from the previous trading day. It opened at 271,500 won, reached an intraday high of 275,000 won and an intraday low of 267,500 won, with volume of 23,565,427 shares. It can be confirmed that Samsung Electronics closed unchanged on a day when both indexes rose, but the simultaneous movement in closing prices alone cannot establish the relationship between the two trends or their reasons. See Samsung Electronics closing data and the Samsung Electronics stock hub.

Hyundai Motor rose 3,000 won(+0.78%) to 388,000 won on September 9, 2026. It recorded an opening price of 385,000 won, an intraday high of 390,000 won, an intraday low of 381,500 won, and volume of 538,088 shares. Its +0.78% gain that day was smaller than the KOSPI’s +1.40% and the KOSDAQ’s +2.28%. Previous analysis of the individual stock is available through Hyundai Motor closing data and the Hyundai Motor stock hub.

SK Square rose 7,000 won(+0.62%) to 1,138,000 won on September 9, 2026. It opened at 1,144,000 won, reached an intraday high of 1,163,000 won and an intraday low of 1,111,000 won, with volume of 634,095 shares. Its closing-price gain of +0.62% was below the index gains, and the intraday price range and closing price alone cannot establish the trading backdrop. Related analysis is available through SK Square closing data and the SK Square stock hub.

Distinguishing Investor-Flow Data From Media Interpretations

Collected investor net-trading figures for September 9, 2026 were individuals -22,879억원, foreign investors -4,351억원, and institutions +9,422억원. These are investor-flow data confirmed for the same trading day and do not provide grounds for explaining the KOSPI’s +1.40% and KOSDAQ’s +2.28% closing gains as the result of trading by a particular investor group or for treating them as a causal relationship. September 9, 2026 investor-flow data

A Yonhap News report published before the market opened that day identified Middle East instability and semiconductor-related developments as market background, while Daum’s market-opening report on the same day mentioned international oil-price moves immediately before the prior day’s close as part of the previous day’s market context. These are interpretations or intraday background presented by the respective reports; the September 9, 2026 regular-session close alone cannot confirm that those explanations were the direct causes of that day’s index gains. Yonhap News original article Daum original article

An early-session report by The Korea Economic Daily reported foreign net buying in the KOSDAQ market, but this should be read separately from the regular-session closing tally. Foreign investor net trading in the collected closing data for September 9, 2026 was -4,351억원, and intraday figures cannot be interpreted together with the regular-session close. The Korea Economic Daily intraday article closing investor-flow data

Three Items to Check in the Next Regular Session

  • The KOSPI’s September 9, 2026 close of 7,051.64 points and intraday high of 7,112.48 points, as well as the KOSDAQ’s close of 830.37 points and intraday high of 830.87 points, can be compared with the next regular-session close. KOSPI data KOSDAQ data

  • For the tracked stocks, the September 9, 2026 closing changes of SK hynix +3.51%, Samsung Electronics 0.00%, Hyundai Motor +0.78%, and SK Square +0.62% can be compared with the next regular session’s index moves.

  • Investor net trading of individuals -22,879억원, foreign investors -4,351억원, and institutions +9,422억원 on September 9, 2026 can be compared with the next regular-session tally. Investor flows and closing prices can be considered together, but a standard is needed that does not treat simultaneous changes on a single trading day as cause and effect. investor-flow data