Despite a decline in the New York stock market, the KOSPI rose more than 1%, hitting an all-time high. Samsung Electronics, based on common shares, surpassed a market capitalization of KRW 1,000 trillion for the first time in history.

On the 4th, the KOSPI closed at 5,371.1, up 1.57% from the previous trading day. Foreign investors recorded net sales of KRW 930 billion and individual investors net sales of KRW 1 trillion, but institutional investors posted net purchases of around KRW 1.8 trillion, pushing the index higher.

Share prices of Samsung Electronics (+0.87%), Doosan Enerbility (+5.37%), and HD Hyundai Electric (+3.94%) increased. SK hynix declined 0.55%, but its drop was smaller than that of Micron Technology in the United States (―4.19%). With the share price gain on the day, the market capitalization of Samsung Electronics based on common shares expanded to KRW 1,001.0108 trillion. Including preferred shares, its market capitalization grew to KRW 1,099.3357 trillion.

Earlier, on the 3rd (local time), the New York stock market fell as share prices of information technology (IT) companies, mainly in the software (SW) sector, declined in the wake of AI company Anthropic’s release of its AI agent “Claude Coward.” By contrast, share prices of Korean companies with strengths in data center infrastructure construction—such as in semiconductors, nuclear power, and electric power equipment—generally rose.

Lee Kyung-min, a researcher at Daishin Securities, explained, “In the process of the market adapting to the rapidly developing AI industry, changing corporate interests, and evolving profit models, the share price trend of domestic companies that make up AI infrastructure has remained solid.” The government’s drive to shift funds (“money move”) from real estate into the domestic stock market also had a positive effect on the market.

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