KOSPI Surges 5% as Semiconductor Stocks Rally, Approaches 9000 Mark

By HYE YOUNG KO Posted : June 25, 2026, 16:40 Updated : June 25, 2026, 16:40
The KOSPI and other indices are displayed on the board at Hana Bank's dealing room in Jung-gu, Seoul, on June 25. [Photo=Yonhap News]

The KOSPI closed higher on June 25, buoyed by strong performance from U.S. chipmaker Micron. At one point during the trading session, the index even approached the 9000 mark.

According to the Korea Exchange, the KOSPI finished at 8930.30, up 459.28 points (5.42%) from the previous trading day. The index opened with a gain of 232.40 points (2.74%) and triggered a buying sidecar early in the session. It peaked at 9044.04, a rise of 573.02 points (6.76%).

During the same period, individual and foreign investors sold a net 24.578 trillion won and 8.355 trillion won, respectively, while institutions purchased a net 33.269 trillion won.

The semiconductor sector, led by major players, surged on the back of Micron's strong results, pushing the index higher. Notably, SK Hynix saw its shares rise by as much as 15.7% during the day, reclaiming the top market capitalization spot before closing as the second-largest by market cap.

Most of the top stocks by market capitalization in the KOSPI also saw gains. Samsung Electronics rose 5.29%, SK Square increased by 6.61%, Samsung Electro-Mechanics climbed 1.73%, Samsung Life Insurance gained 2.89%, Samsung C&T surged 8.00%, and SK jumped 20.93%. Conversely, Hyundai Motor fell 0.98%, LG Energy Solution dropped 3.69%, and Samsung Biologics decreased by 0.51%.

By sector, electrical and electronics stocks rose 7.64%, retail gained 6.53%, insurance increased 4.03%, finance was up 3.47%, pharmaceuticals rose 1.85%, and IT services climbed 0.64%. In contrast, machinery and equipment fell 1.15%, chemicals decreased 0.36%, and transportation equipment and parts dropped 0.23%.

Lee Kyung-min, a researcher at Daishin Securities, noted, "The domestic market focused on the semiconductor sector, leading to a differentiated performance among sectors. The confirmation of SK Hynix's U.S. ADR issuance schedule further bolstered its strength today."

The KOSDAQ index closed down 21.50 points (2.36%) at 887.81. It opened higher at 923.66, up 14.35 points (1.58%), but reversed course and widened its losses during the session.

In the KOSDAQ market, institutions sold a net 1.706 trillion won, while individuals and institutions bought a net 1.477 trillion won and 212 billion won, respectively.

Most of the top stocks by market capitalization in the KOSDAQ also experienced declines. EcoPro BM fell 5.84%, EcoPro dropped 5.48%, Rainbow Robotics decreased 0.39%, Kolon TissueGene fell 0.79%, JUSUNG Engineering dropped 8.50%, HLB decreased 1.89%, and IOTechniques fell 2.98%. Meanwhile, Alteogen rose 1.21%, Wonik IPS increased 2.32%, and Rino Technology gained 3.52%.

Kang Jin-hyuk, a researcher at Shinhan Investment Corp., commented, "The concentration of KOSPI demand limited the gains of large-cap stocks in the KOSDAQ market, while small and medium-sized stocks showed mixed performance, contributing to the index decline."



* This article has been translated by AI.

Copyright ⓒ Aju Press All rights reserved.