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(Seoul=Yonhap Infomax) Yong Bi Yang = The South Korean benchmark KOSPI index continued its pattern of early-session gains followed by late-session weakness, closing firmly above the 3,800 mark despite losing momentum toward the end of trading.
On the 25th, according to Infomax's New Stock Window (screen number 3536), the KOSPI finished at 3,857.78, up 11.72 points (0.30%) from the previous session.
While domestic retail and institutional investors were net sellers, foreign investors offset this with net purchases totaling 1.159 trillion won ($870 million).
The KOSPI opened with strong upward momentum, mirroring gains on Wall Street as positive reviews of Gemini 3.0 fueled optimism across technology stocks. The index surged more than 2% in early trade, reaching an intraday high of 3,946.61.
However, the rally proved short-lived. By around 10:00 AM KST, selling pressure intensified, erasing earlier gains and pushing the index below the 3,900 level. The KOSPI dipped to 3,855.35 after 13:00 KST but quickly rebounded.
In the previous session, the KOSPI had climbed to the 3,915 level before closing at 3,846.
Despite the dollar-won exchange rate declining for the first time in seven sessions, investor sentiment remained constrained by the currency hovering in the 1,470 won range.
Previously, concerns centered on AI tools—particularly those from OpenAI—being heavily reliant on NVIDIA's GPUs, leading to significant acquisition, maintenance, and depreciation costs. In contrast, Google has built its Gemini system around its proprietary AI chip, the Tensor Processing Unit (TPU), substantially reducing external expenditures. With major AI services having completed much of their training, expectations are rising that TPUs, which excel at inference, will play a greater role going forward.
ISU Petasys Co. soared 12.47% to close at 140,700 won. The company has been the subject of repeated 'Buy' recommendations from securities firms. Meritz Securities raised its target price for ISU Petasys by 14.3% to 160,000 won, citing its position as a core value chain player in the TPU sector and entering a valuation rerating phase.
Electric power-related stocks also stood out. Samsung Electro-Mechanics Co., expected to benefit from a potential upcycle in MLCC prices, and Korea Electric Power Corp. (KEPCO), buoyed by growing nuclear premium expectations, both gained 6.86% and 6.85%, respectively. HD Hyundai Electric Co. also rose 4%.
Samsung Biologics Co. and Samsung EpiSys Holdings, which was relisted after a spin-off, were among the day's biggest decliners. Samsung EpiSys Holdings plunged 28.23% to close at 438,500 won on its first day of trading.
The KOSDAQ index ended down 0.41 points (0.05%) at 856.03.
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ybyang@yna.co.kr
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