The KOSPI index surged over 5% and closed significantly higher on June 15, 2026, following news of a peace agreement between the United States and Iran. The easing of geopolitical risks in the Middle East has heightened expectations for the index to reach the 9,000-point mark.
According to the Korea Exchange, the KOSPI finished at 8,545.98, up 422.36 points (5.20%) from the previous trading day. The index opened at 8,526.12, rising by 402.50 points (4.95%) before expanding its gains throughout the session.
The KOSPI 200 futures index's sharp increase triggered a temporary trading halt for program buying in the securities market at 9:06 a.m. This marked the second consecutive day for the KOSPI buying halt, following one on June 12.
Earlier that day, U.S. President Donald Trump announced the conclusion of peace negotiations with Iran via Truth Social. He stated, "The agreement with the Islamic Republic of Iran has been finalized," and expressed full approval for the free passage through the Strait of Hormuz. The domestic stock market reflected this news with a bullish trend.
Lee Kyung-min, a researcher at Daishin Securities, noted, "The KOSPI's rise was fueled by increased risk appetite following the U.S.-Iran peace agreement, leading to the 14th buying halt of the year, resulting in a significant surge. All sectors showed strong performance."
In terms of trading activity, both foreign and institutional investors engaged in substantial buying. Foreign investors purchased a net 1.1 trillion won, while institutions bought a net 546 billion won, driving the index higher. Conversely, individual investors sold a net 1.4944 trillion won, realizing profits.
Major stocks in the market showed strong gains. Samsung Electronics rose by 4.81%, SK Hynix by 6.79%, SK Square by 3.68%, Samsung Electro-Mechanics by 16.10%, Hyundai Motor by 6.43%, LG Energy Solution by 5.00%, Samsung Life by 9.21%, Samsung C&T by 14.58%, and HD Hyundai Heavy Industries by 9.23%.
The KOSDAQ index also experienced an upward trend, closing at 1,034.03, up 4.98 points (0.48%). It opened at 1,048.19, gaining 19.14 points (1.86%) but retraced some gains to finish above the 1,030 mark.
In the KOSDAQ market, individual and institutional investors bought a net 616.6 billion won and 216.3 billion won, respectively, supporting the index. However, foreign investors sold a net 806.4 billion won.
Among the top market capitalization stocks, there was a mix of performance. Alteogen rose by 3.56%, EcoPro BM by 9.47%, EcoPro by 7.09%, Rainbow Robotics by 6.09%, Kolon TissueGene by 2.14%, and HPSP by 16.78%. In contrast, JUSUNG Engineering fell by 2.60%, Wonik IPS by 4.36%, Rino Technology by 6.32%, and EO Technics by 12.75%.
* This article has been translated by AI.
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