On the 30th, the KOSPI surpassed the 4,100 mark during intraday trading, setting a new all-time high. However, as profit-taking orders were released, the index gave up much of its gains and closed at the 4,080 level.
As the KOSPI index continues to hit record highs day after day, the status board in the dealing room of Hana Bank in Jung-gu, Seoul, displays the KOSPI and the won/dollar exchange rate on the 30th. On this day, the KOSPI started at 4,105.95, up 24.80 points (0.61%) from the previous session, and at one point reached an intraday record high of 4,146.72. 2025.10.30 Photo by Jo Yongjun
The KOSPI closed at 4,086.89, up 5.74 points (0.14%) from the previous trading day. The index started at 4,105.95, up 0.61% from the day before, and climbed as high as 4,146.72 during the session. However, after 10 a.m., the index reversed course and fell to as low as 4,070.79. In the afternoon, the decline was recovered and the index rebounded into positive territory.
KB Securities analyzed, "President Trump, after the US-China summit, returned home without commenting on any achievements, which increased market volatility. Leading stocks gave up most of their gains, and the KOSPI experienced a fluctuation of about 2 percentage points in the morning alone, then continued to oscillate near the flat line throughout the session."
The firm added, "Afterwards, the US announced a 10 percentage point reduction in tariffs on Chinese goods, and China said it would maintain rare earth supplies for a year, but these measures were insufficient to resolve uncertainties. In addition, US Secretary of Commerce Rutnik's comment that 'semiconductor tariffs were not included in the latest agreement' regarding negotiations with South Korea also heightened investor anxiety."
By investor type, foreign investors and institutions were net sellers, offloading 117.7 billion won and 837.9 billion won, respectively. In contrast, individual investors were net buyers, purchasing 937.3 billion won.
By sector, entertainment and culture rose by 2.75%. The electrical and electronics, as well as transportation equipment and parts sectors, each gained more than 1%. On the other hand, electric and gas, machinery and equipment, and construction sectors each fell by more than 4%. The medical and precision, and metals sectors dropped by over 2%, while non-metallic minerals, telecommunications, distribution, textiles and apparel, chemicals, and paper and wood all declined by more than 1%.
Among the top market cap stocks, Samsung Electronics ended trading at 104,100 won, up 3,600 won (3.58%) from the previous session. Hanwha Ocean surged 6.90%, Hyundai Motor rose 2.71%, and SK Hynix gained 1.79%. Conversely, Samsung Biologics dropped 6.95%, and LG Energy Solution fell 5.35%. NAVER and Samsung C&T also declined by 3.58% and 1.73%, respectively.
On the KOSPI, 191 stocks rose with no stocks hitting the upper limit, while 707 stocks fell with none hitting the lower limit. There were 29 stocks that remained unchanged.
The KOSDAQ closed at 890.86, down 10.73 points (1.19%) from the previous trading day.
By investor type, foreign investors were net buyers, purchasing 185.4 billion won. In contrast, individuals and institutions were net sellers, offloading 97 billion won and 35.7 billion won, respectively.
By sector, the financial sector declined by 3.51%. The paper and wood, chemicals, textiles and apparel, electrical and electronics, and metals sectors each dropped by more than 2%. Other manufacturing, transportation equipment and parts, telecommunications, food and beverages and tobacco, and machinery and equipment also fell by more than 1%. In contrast, entertainment and culture rose by 0.46%.
Among the top market cap stocks, Alteogen ended trading at 472,000 won, up 5,500 won (1.18%) from the previous session. Pharmaresearch climbed 5.43%, and Rainbow Robotics jumped 2.03%. On the other hand, Ecopro BM and Caregen each fell by more than 5%, while Ecopro and Voronoi dropped by 4.19% and 3.79%, respectively.
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