On the previous day, the KOSPI index, which had hit a record high in 3 years and 10 months, set a new peak once again. Samsung Electronics rebounded after a decline for four consecutive trading days, lifting the index. As foreign investors made a net purchase of about 270 billion won on the simultaneous expiration date of futures and options, the index's increase was significantly amplified at the time of the simultaneous quotation.
On the 10th, the KOSPI index closed at 3183.23, up 49.49 points (1.58%) from the previous trading day. In the stock market, foreign and institutional investors bought 448.6 billion won and 41.5 billion won, respectively, while individuals sold a net 560 billion won. Notably, as foreign and domestic institutions engaged in simultaneous buying in the afternoon, the index's increase was driven.
In the top 10 stocks by market capitalization on the stock market, most showed strong performance. Samsung Electronics and SK hynix rose by 0.99% and 5.69%, respectively, while Samsung Biologics (6.09%), LG Energy Solution (4.26%), and NAVER (2.17%) also displayed strength. In contrast, KB Financial (-1.35%), Hyundai Motor (-0.72%), and Doosan Enerbility (-2.02%) showed weakness.
The KOSDAQ index recorded 797.70, up 7.34 points (0.93%) from the previous trading day. On this day, in the KOSDAQ market, foreign investors made a net purchase of 147.1 billion won, while individuals and institutions sold a net 13.4 billion won and 146.7 billion won, respectively.
Among the top 10 stocks by KOSDAQ market capitalization, the rise of pharmaceutical and biotech-related stocks was particularly notable. Alteogen rose by 6.02%, while HLB and LigaChem Biosciences increased by 2.43% and 16.9%, respectively. Ecopro (1.12%), ECOPRO BM (0.69%), and Peptron (1.97%) also showed strength. In contrast, the beauty and medical device sector stocks PharmaResearch (-5.56%) and HUGEL (-2.22%) experienced weakness.
By industry, stocks in semiconductors, healthcare, chemicals, communications, and defense rose. In contrast, financial holding, internet, entertainment, and nuclear-related stocks fell. Lee Jae-won, a researcher at Shinhan Investment Corp., noted, 'The rise in stock prices of major American tech firms and the decline in market interest rates contributed to the upward trend of Korean tech stocks, including semiconductors,' and added, 'The biopharmaceutical sector also performed strongly due to the U.S. government's tariff deferment on pharmaceuticals.'
Lee Kyung-min, head of investment strategy at DAISHIN SECURITIES, said, 'After U.S. President Donald Trump sent a mutual tariff letter, concerns over tariffs peaked, allowing the index's upward trend to continue,' and he explained, 'The won-to-dollar exchange rate stabilized, leading to net purchases by foreign and institutional investors, allowing the KOSPI index to breach the 3180 level.'
Meanwhile, as of the market closing time, the won-to-dollar exchange rate recorded 1371 won, down 4.2 won from the previous day.