KOSPI Rises Over 2% as Foreign and Institutional Investors Buy; SK Hynix Gains 5%

by SONG YOONSEO Posted : September 18, 2026, 12:32Updated : September 18, 2026, 12:32

The KOSPI index is continuing its upward trend, rising over 2% thanks to simultaneous net buying by foreign and institutional investors. Following a strong performance in semiconductor and artificial intelligence stocks on the U.S. market, major semiconductor companies like Samsung Electronics and SK Hynix are driving the index higher. The KOSDAQ index is also maintaining its upward momentum.


As of 12:15 p.m. on September 18, the KOSPI has risen by 173.62 points (2.59%) to 6,889.03 compared to the previous trading day. The index opened at 6,885.70, up 170.29 points (2.54%), and has continued to show a gain of over 2%.


In the securities market, foreign and institutional investors have net bought 651.5 billion won and 759.2 billion won, respectively. In contrast, individual investors have net sold 2.304 trillion won.


Most of the top market capitalization stocks are showing gains. Samsung Electronics is up 3.17%, SK Hynix has risen 5.27%, SK Square is up 5.46%, Samsung Electro-Mechanics has increased by 4.96%, and Hyundai Motor is up 1.10%. However, LG Energy Solution has decreased by 0.55%, and KB Financial is down 1.40%.


The KOSDAQ index is also on the rise. At the same time, the KOSDAQ index has increased by 5.33 points (0.65%) to 827.51. The index opened at 832.72, up 10.54 points (1.28%), but has since given back some of its gains.


In the KOSDAQ market, individual and institutional investors have net bought 18.6 billion won and 19.4 billion won, respectively, while foreign investors have net sold 44.5 billion won.


Among the top market capitalization stocks, there is a mixed trend. Alteogen is down 0.20%, EcoPro has decreased by 0.97%, Juseong Engineering is down 0.98%, IOTechniques has dropped 1.73%, Simtech is down 1.95%, and Robotis has decreased by 0.81%. Conversely, EcoPro BM is up 1.17%, Rainbow Robotics has risen 0.93%, Wonik IPS is up 0.93%, and Rino Industrial has increased by 4.52%.


Meanwhile, the Bank of Japan (BOJ) has decided to raise its short-term policy interest rate from the current level of around 1.0% to approximately 1.25%, marking the highest level in 31 years since 1995.





* This article has been translated by AI.