![[Seoul=NEWSIS] Reporter Kim Seon-woong = On the morning of the 28th, market conditions at the opening were displayed on an electronic board in front of the Hana Bank headquarters dealing room in Jung-gu, Seoul. The KOSPI opened down 23.06 points (0.33%) at 7,057.86 points, while the KOSDAQ index opened up 1.00 point (0.12%) at 845.48. 2026.09.28. mangusta@newsis.com /Photo=Kim Seon-woong](https://thumb.mt.co.kr/cdn-cgi/image/f=avif/21/2026/09/2026092808495048618_1.jpg)
On the first trading day after the Chuseok holiday, the KOSPI is fluctuating around the 7,000-point line. Retail investors are buying alone with a net purchase of 160 billion won, absorbing selling pressure from foreign investors and institutional investors.
As of 9:30 a.m. on the 28th, the KOSPI is down 36.22 points (0.51%) at 7,044.70 compared to the previous trading day.
Overnight in New York, expectations that peace negotiations between the United States and Iran are progressing led to a broad-based rally, with all major indices closing higher. On the 25th (local time), the S&P 500 index closed up 39.28 points (0.51%) at 7,743.41 from the previous session, while the NASDAQ Composite closed up 129.34 points (0.48%) at 27,068.72. The Dow Jones Industrial Average closed up 478.64 points (0.93%) at 51,828.62 from the previous session.
Analysis suggests that while the domestic stock market was closed for the Chuseok holiday from the 23rd to the 25th, the U.S. market showed neutral trends amid coexisting macroeconomic uncertainty and AI (artificial intelligence) momentum. Over the three trading days, cumulative changes were recorded as follows: Dow -0.1%, S&P 500 -0.3%, NASDAQ -0.6%, and Philadelphia Semiconductor Index -0.2%.
Han Ji-young, a researcher at Kiwoom Securities, stated, "This week, major domestic and international events such as U.S. September employment data, South Korea's September exports, and Micron's earnings are scheduled, so the domestic stock market is expected to engage in a battle around the 7,000-point level, with active tug-of-war in the market."
On this day, foreign investors and institutional investors recorded net sales of 156.2 billion won and 23 billion won, respectively, in the KOSPI market (based on integration between Korea Exchange and NextTrade). Retail investors recorded a net purchase of 165.2 billion won.
Among KOSPI sectors, securities and retail are down over 1%. Metals, electrical & electronics, manufacturing, finance, real estate, electricity & gas, and machinery & equipment are showing weak flat trends. Non-ferrous metals, transportation & warehousing, transport equipment & parts, insurance, and pharmaceuticals are trading with strong flat trends. Telecommunications, IT (information and communications) services, and entertainment & culture are up over 1%. Chemicals are rising by more than 2%.
Among the top market capitalization stocks in KOSPI, SK Square and SK Hynix are down over 3% and over 2%, respectively. Samsung C&T and Samsung Electronics are down over 2% and over 1%, respectively. Hyundai Motor and KB Financial Group are showing strong flat trends. Samsung Life is up over 1%. LG Energy Solution and Samsung Biologics are rising by more than 2%, while Samsung Electro-Mechanics is up by more than 3%.
The KOSDAQ is up 11.27 points (1.33%) at 855.75 compared to the previous trading day.
In the KOSDAQ market, retail investors recorded a net purchase of 59.7 billion won. Foreign investors and institutional investors recorded net sales of 50.1 billion won and 8 billion won, respectively.
Among KOSDAQ sectors, pharmaceuticals are up over 3%. Electrical & electronics, textiles & apparel, IT services, chemicals, manufacturing, medical & precision instruments, and finance are showing strong flat trends. Metals, transport equipment & parts, telecommunications, transportation & warehousing, and construction are showing weak flat trends. Non-ferrous metals are down by more than 1%.
Among the top market capitalization stocks in KOSDAQ, HLB surged 29.95% to hit the upper limit price. This is interpreted as buying pressure driven by news that HLB's bile duct cancer treatment received approval from the U.S. Food and Drug Administration (FDA). Altheogen is up over 3%. EcoPro, EcoPro BM, Juseong Engineering, and Simtek are up by more than 1%. RAINBOW Robotics is showing a strong flat trend, while Reno Industrial shows a weak flat trend. IOTech and Wonik IPS are down by over 1% and over 3%, respectively.
On this morning at 9 a.m., the won/dollar exchange rate in Seoul's foreign exchange market was trading at 1,359 won, up 2 won from the previous trading day.