SEOUL — South Korea's benchmark Kospi index climbed further Tuesday, extending a rebound from last month's steep selloff as strong gains in Samsung Electronics and other chipmakers lifted the broader market.

The Kospi rose 0.73%, or 45.87 points, to close at 6,345.53, according to trading data. The index opened at 6,240.06, touched an intraday high of 6,405.81 and dipped to a low of 6,213.78 before settling higher for the session. Trading unfolded in a quieter regional backdrop, with Japanese markets closed Tuesday for the Mountain Day public holiday.

Samsung Electronics led the advance, with shares climbing 4.13%, while SK Hynix also edged higher as investors continued rewarding the country's dominant memory chip producers. The gains extended a broader rebound in Korean chip stocks, which have remained a central focus for investors throughout 2026 amid strong global demand for memory chips tied to artificial intelligence infrastructure spending.

SK Hynix disclosed progress on its next-generation DRAM research and development efforts, saying it had integrated extreme ultraviolet lithography upgrades and new materials into its production process following the company's adoption of High-NA EUV equipment, a more advanced lithography technology used to manufacture smaller, more powerful memory chips. The announcement added to investor optimism around the company's ability to maintain its competitive position in........

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