In Seoul, the benchmark KOSPI inched up 2.10 points to 4,222.66 as of 10:10 a.m., while the tech-heavy KOSDAQ fell 0.9 percent to 924.70. The broader index was little changed overall, but heavyweight semiconductor shares extended their rally.
Samsung Electronics rose 0.9 percent to 120,600 won ($84), while SK hynix climbed 2.7 percent to 657,000 won, both hitting record highs. On Monday, Samsung Electronics had already advanced 2.1 percent to a record close of 119,500 won, lifting its market capitalization above 700 trillion won ($488 billion) for the first time.
The rally has been underpinned by strong export data and tightening chip supply. From January to November, South Korea’s semiconductor exports reached $152.6 billion, up 19.8 percent from a year earlier, leading the country’s export growth in 2025. November industrial output data also showed semiconductor inventories plunging 42.6 percent from a year earlier, highlighting aggressive stockpiling amid fears of supply shortages.
LG Energy Solution, the third-largest stock by market value, fell 2.8 percent to 369,500 won. HD Hyundai Heavy Industries slipped 1.7 percent to 514,000 won, Hanwha Aerospace lost 1.6 percent to 934,000 won, Hanwha Ocean declined 1.5 percent to 113,900 won, HD Korea Shipbuilding & Offshore Engineering retreated 1.3 percent to 405,000 won, and Korea Zinc tumbled 4 percent to 1,317,000 won.
Entertainment stocks, however, moved higher across the board. HYBE gained 0.3 percent to 321,000 won, JYP Entertainment climbed 1.4 percent to 72,100 won, SM Entertainment edged up 0.3 percent to 128,400 won, and YG Entertainment jumped 3.3 percent to 66,800 won.
Tuesday marks the final trading day of South Korea’s stock market in 2025. The first regular trading session of 2026 will open at 10 a.m. on Friday. There will be no pre-market trading that day, and the main, block and basket trading sessions will all begin at 10:00:30 a.m.
Elsewhere in Asia, market moves were muted.
In Tokyo, the Nikkei 225 slipped 0.2 percent to 50,418.06. Among major heavyweights, Toyota Motor rose 0.1 percent to 3,367 yen ($21.6), Mitsubishi UFJ Financial Group edged down 0.1 percent to 2,494 yen, and SoftBank Group fell 1 percent to 4,442 yen.
In China, the Shanghai Composite declined 0.3 percent to 3,952.68, while Hong Kong’s Hang Seng Index slipped 3.69 points to 25,631.54. The Shanghai market trades on Wednesday.
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