SEOUL, December 22 (AJP) - Asian markets opened the week on signs of a “Santa Claus rally,” as a key overhang — Japan’s long-anticipated rate hike — was cleared last week, reviving risk appetite across the region.
Chip stocks led the advance after strong earnings from Micron Technology and fresh optimism around high-bandwidth memory (HBM), reinforcing the global AI-driven semiconductor rally.
In Seoul, the benchmark KOSPI was up 1.97 percent at 4,099 as of 10 a.m., raising hopes the index could close above the psychologically important 4,100 mark for the first time in ten days.
Institutional investors spearheaded the rally with net purchases of 776.4 billion won ($525 million), supported by foreign inflows of 344.0 billion won. Retail investors appeared to be locking in gains after recent volatility, net selling 1.1 trillion won.
The Korean won strengthened modestly to 1,477 per dollar, up 4 won from the previous close. Market participants attributed the move to year-end currency hedging by the National Pension Service and institutional investors seeking to lock in exchange rates ahead of the Dec. 30 market close.
Blue chips traded broadly higher. Samsung Electronics gained 3 percent to 110,000 won after reports that its HBM4 samples received top-tier evaluations in quality tests for Nvidia. Rival SK hynix, the market leader in HBM, surged 4.75 percent to 575,000 won, emerging as a primary beneficiary of the improving AI memory outlook alongside Micron’s upbeat results.
Korea Zinc, the world’s leading non-ferrous metal smelter and a focal point of ongoing corporate governance disputes, rose 5.4 percent to 1,380,000 won. Uncertainty surrounding its U.S. refinery investment eased after the South Korean government expressed a favorable stance, while Chairman Choi Yoon-bum and the Young Poong–MBK alliance reaffirmed their commitment to the project.
Doosan Enerbility, seen as a bellwether for nuclear power and small modular reactors (SMRs), rose 2.2 percent to 79,000 won, defying lingering caution over a potential AI-sector bubble.
In Tokyo, the Nikkei 225 jumped 2.1 percent to 50,557, as the removal of Bank of Japan-related uncertainty combined with Micron-led tech optimism to trigger broad-based buying.
Semiconductor equipment makers led the gains. Tokyo Electron surged 6.3 percent to 33,160 yen ($210.7), while Advantest rose 3.5 percent, DISCO gained 4.8 percent, and Ibiden climbed 5.2 percent. Financial and holding companies also found favor, with SoftBank Group Corp. jumping 6.4 percent to 18,210 yen, buoyed by the BOJ’s rate move and easing AI-bubble concerns in New York. Mitsubishi UFJ Financial Group advanced 2.3 percent.
Taiwan’s TAIEX rose 1.4 percent to 28,084, anchored by a 2.1 percent gain in TSMC, which traded at 1,460 Taiwan dollars ($46.33). MediaTek slipped 0.7 percent, while Foxconn edged up 0.7 percent.
Mainland China showed a tech-led divergence. The Shenzhen Component Index rose 1.1 percent to 13,285, outperforming the more domestically focused Shanghai Composite’s 0.5 percent gain and the Hang Seng Index’s 0.3 percent rise.
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