South Korea’s stock market has been buzzing with excitement in early 2026, as the KOSPI index, led by semiconductor giants Samsung Electronics and SK Hynix, smashed through the 6,000-point barrier. According to Yonhap Infomax, this historic rally stems from robust earnings forecasts and a wave of target price upgrades for both companies. Yet, as investors celebrate record highs, a sense of caution is growing over the sustainability of these gains and the shifting dynamics within Korea’s tech sector.
On February 25, Samsung Electronics and SK Hynix stood at the forefront of the rally. Samsung C&T, a key holding company within the Samsung conglomerate, soared to a record high of 351,000 KRW, up about 40% since the start of the year. SK Square, SK Group’s investment arm, also hit an all-time high of 660,000 KRW, boasting a staggering 60% year-to-date jump. Its market capitalization skyrocketed from about 50 trillion KRW to 81.5 trillion KRW, making it the sixth-largest on the KOSPI as of February 24.
Analysts are taking note. SK Securities recently raised SK Square’s target price to 580,000 KRW, citing the company’s status as the largest beneficiary of SK Hynix’s unexpectedly generous shareholder returns. KB Securities, meanwhile, bumped up Samsung C&T’s target to 360,000 KRW, pointing to the rising value of its stakes in Samsung Electronics and the group’s bio affiliates. As of late February, Samsung C&T’s market capitalization had climbed to 57.45 trillion KRW, mirroring the 40% year-to-date increase seen in its share price.
But it’s not just the numbers that have investors talking. The structure of these conglomerates is drawing fresh interest, especially as a way to hedge against volatility in the semiconductor sector. While Samsung C&T’s stake in Samsung Electronics—5.05% as of September 2025—is lower than Samsung Life’s 8.51%, market watchers say expectations for shareholder-friendly policies are higher for C&T. According to KB Securities’ Jang Moon-jun, “With the conclusion of Samsung C&T’s previous three-year shareholder return plan, there’s a strong chance that the next policy will be even more generous.”
Yet, beneath the euphoria, there are warning signs. The rapid accumulation of loan transactions—a key indicator of potential short selling—suggests some investors are bracing for a correction. As of February 24, the loan transaction balance stood at 18.7788 trillion KRW for Samsung Electronics and 15.6174 trillion KRW for SK Hynix, the highest among all KOSPI-listed stocks. This has prompted a shift in capital toward relatively undervalued holding companies, as investors seek safer ground amid possible short-term volatility.
Meanwhile, the semiconductor world is in the midst of a fierce technological arms race. The demand for high bandwidth memory (HBM), especially the latest HBM4 generation, is surging thanks to the proliferation of AI servers. According to Straight News, Samsung Electronics began mass production shipments of HBM4 on February 12, with SK Hynix set to start supplying within the first quarter. The real battle for dominance, however, is expected to heat up in the second quarter of 2026.
NVIDIA, the global AI chip leader, is at the center of this competition. To ensure a stable supply and strengthen its bargaining position, NVIDIA is diversifying its suppliers, bringing in Micron alongside Samsung and SK Hynix. TrendForce reports that NVIDIA’s next-generation AI accelerator, Vera Rubin, requires HBM4 chips with pin speeds above 11 Gbps—higher than initially anticipated. Samsung is leveraging its advanced 1c DRAM and 4nm logic processes to deliver HBM4 chips capable of up to 13 Gbps and 10–20% improved power efficiency. SK Hynix, meanwhile, is banking on its longstanding partnership with NVIDIA, having supplied 60–70% of previous HBM generations, and is ramping up its production capacity by accelerating the completion of its new cleanroom in Cheongju.
But there’s more to the story than just raw speed. The adoption of hybrid bonding technology—a cutting-edge packaging method that improves heat dissipation and signal speed—is looming on the horizon. As reported by The Elec, VESI CEO Richard Blickman revealed that Samsung’s decision on deploying hybrid bonding for HBM4 and HBM3E products will be clarified in early Q2 2026. Hybrid bonding connects copper surfaces of semiconductor dies directly, reducing electrical resistance and enabling thinner, cooler, and faster memory stacks. Samsung demonstrated that using this technology for 12- and 16-layer HBM stacks can cut thermal resistance by 20% and lower base die temperature by over 11%. SK Hynix is also set to begin its own hybrid bonding process verification between April and May 2026, possibly applying it to HBM4 or preparing for even more advanced 20-layer stacks in the future.
Despite these technological feats, Samsung Electronics faces headwinds elsewhere. According to Seoul Finance, the company’s traditional strength in finished products—TVs and home appliances—is waning. Industry insiders point to structural challenges that go beyond temporary dips in demand. Premium strategies like Neo QLED, OLED, bespoke designs, and AI enhancements have failed to deliver the kind of breakthrough innovation that once set Samsung apart. The pace of “world first” products has slowed dramatically since 2010, a stark contrast to the 1990s and 2000s when Samsung regularly upended markets with groundbreaking launches.
This innovation slowdown is partly attributed to a strategic shift under Chairman Lee Jae-yong, who since 2014 has emphasized financial stability and efficiency over bold R&D spending. Samsung’s research and development budget shrank from 15.3 trillion KRW in 2014 to about 14.7 trillion KRW by 2016, with surplus cash increasingly funneled into shareholder returns instead of new product development.
The consequences are now showing up in the bottom line. Samsung’s Visual Display (VD) and Digital Appliances (DA) divisions swung to a combined operating loss of about 200 billion KRW in 2025, with projections from NH Investment & Securities warning that losses could balloon to over 2 trillion KRW in 2026. In December 2025, Chinese rival TCL overtook Samsung in global TV market share by shipment volume, claiming 16% compared to Samsung’s 13%. TCL’s rise is fueled not just by aggressive pricing but also by technological advances such as Super Quantum Dot Mini LED displays.
Samsung isn’t standing still, though. The company is betting big on AI-driven innovation to regain its competitive edge. At CES 2026 in Las Vegas, DX division chief No Tae-moon announced plans to embed AI into 400 million devices this year—from Galaxy smartphones to premium 4K+ TVs and Wi-Fi–connected appliances—creating a seamless, interconnected AI home ecosystem. "Through AI innovation, we will bring real changes to our customers’ lives and deliver Samsung’s unique value," No Tae-moon declared.
As Korea’s tech titans race to stay ahead in the global semiconductor and electronics markets, the coming months promise both high-stakes competition and the possibility of transformative change. Whether the next wave of innovation comes from memory chips, advanced packaging, or AI-powered homes, one thing is clear: the world will be watching.