Why SK Hynix Shares Rose 5.5% on the Temasek Investment Report

But the distinction between a report and a completed transaction matters. Available reporting did not disclose a purchase value or execution date, while other accounts said Temasek already held positions in the two companies and was considering additional capital deployment. The market therefore reacted to the possibility and its implied vote of confidence, rather than to newly reported earnings or a finalized deal.

Why SK Hynix was especially sensitive

The Temasek story landed soon after SK Hynix expanded its reach into the US capital markets. The company’s $26.5 billion Nasdaq listing in July gave American investors direct access to the South Korean memory-chip maker, whose products are closely tied to the AI hardware cycle.

That listing did not create SK Hynix’s investment case, but it made the company easier for global investors to trade and follow. The Temasek report consequently added another institutional-investor angle to a stock already positioned at the center of the AI-memory narrative.

SK Hynix’s core strategic advantage is its exposure to high-bandwidth memory, or HBM. These specialized memory chips support the processors used in advanced AI systems, and SK Hynix has spent years building a position in the market. Reuters described HBM as a critical component in Nvidia’s AI accelerators and linked the company’s long-term strategy to that demand.

How the Nvidia partnership strengthens the case

In July, SK Group and Nvidia announced a planned partnership valued at more than $500 billion. The initiative spans AI infrastructure and a long-term arrangement under which Nvidia and SK Hynix will secure and co-develop next-generation AI memory, including HBM.

Nvidia said it had secured AI-memory supply from SK Hynix as the market faced a shortage of an important component for advanced processors and systems. Large-scale AI-factory capacity associated with the broader initiative is expected to begin coming online in 2027.

For investors, the significance is less about the headline value alone than about visibility into future demand. A long-term supply and co-development relationship with Nvidia could give SK Hynix a clearer role in the next generation of AI infrastructure. It also explains why a prospective investment from Temasek was read as confirmation of an existing theme rather than an entirely new catalyst.

Record earnings support the AI-memory narrative

The bullish case also has a recent earnings foundation. SK Hynix reported 2025 revenue of ₩97.15 trillion and operating profit of ₩47.21 trillion, with annual operating profit more than doubling from the previous year. Its fourth-quarter operating profit reached ₩19.17 trillion, up 137% year over year, as AI demand lifted memory prices and sales.

Those results show why investors have been willing to connect SK Hynix’s valuation to the growth of AI infrastructure. Demand for HBM and other memory products has translated into unusually strong profitability, rather than remaining only a long-term technology story.

Still, strong results do not eliminate cyclical risk. Memory markets can change quickly when supply expands, customers adjust inventories or expectations move faster than actual demand. The sharp share-price response to the Temasek report shows how much of the stock’s valuation is also being shaped by investor positioning and confidence in the next phase of the AI cycle.

Analysts are bullish—but far from unanimous

Analyst commentary has generally remained constructive, but price targets vary dramatically. One Mirae Asset report maintained a Buy rating while raising its target by 43.3% to ₩1.37 million. Separately, a review of Korean securities-firm estimates found targets ranging from ₩1.48 million to ₩4.7 million after SK Hynix’s record results.

That gap is important. It indicates broad agreement that SK Hynix has strong AI-memory exposure, but no consensus on how long pricing power, supply tightness and exceptional earnings growth can last. The most optimistic forecasts assume that HBM demand and the company’s strategic position remain powerful well beyond the immediate rebound.

The market takeaway

The Temasek report acted as a catalyst because it brought several bullish narratives together at once:

• potential sovereign-wealth-fund interest in Korean memory stocks;
• SK Hynix’s new Nasdaq access for global investors;
• a long-term Nvidia relationship tied to next-generation HBM;
• supply constraints in AI memory; and
• record recent earnings and profit growth.

The result was a sharp, sentiment-driven rebound in SK Hynix and a broader lift for South Korean equities. But the rally should not be read as proof that Temasek will complete a new investment or that SK Hynix’s future returns are assured. The reported transaction remained uncertain, and the wide spread in analyst targets shows that investors are still debating how much of the AI-memory boom is structural and how much is cyclical.

The clearest interpretation is therefore narrower: Temasek news strengthened the market’s willingness to buy the AI-memory story after a sell-off. Whether that confidence survives will depend less on the rumor itself than on SK Hynix’s ability to convert Nvidia-linked demand and HBM leadership into durable earnings as new supply eventually reaches the market.