Seoul's Listing Rules and a Global Chip Rout Leave SK Hynix Nursing a 16% Weekly Loss
Published on 10/20/2026 at 11:40 | Editorial boerse-global.de
SK Hynix shares came under fresh selling pressure on Tuesday, with two separate forces — a regulatory obstacle to a planned US flotation and a broad retreat from semiconductor stocks — combining to push the Korean memory maker deeper into the red.
The stock closed down 4.9% at KRW 1,214,000, according to one reading of the session, with a separate quote putting the decline at 4.2% to KRW 1,223,000. Either way, the move extends a bruising run: over the past seven days the shares have shed 16%, and they now sit 59% below their 52-week high.
A selloff that started far from Seoul
The immediate trigger was a region-wide exit from chip names. Foreign and institutional investors led the retreat, and the benchmark Kospi fell 2.8% in early trading, as reported by the AP news agency. Beneath the selling lies a broader reassessment of the semiconductor cycle. Market participants are weighing uncertainty over the returns on the enormous sums being poured into global AI infrastructure, while a persistently high interest rate environment and mounting competition from China are weighing on sentiment.
Among the specific worries is Chinese memory maker CXMT, which press reports say is making headway on advanced 4F² DRAM. That competitive threat is now showing up in SK Hynix's medium-term share price performance.
Should investors sell immediately? Or is it worth buying SK Hynix?
Regulator throws cold water on Solidigm's Nasdaq plans
Adding to the unease is the fate of subsidiary Solidigm, in which the parent holds an indirect 100% stake. Lee Chan-jin, head of South Korea's Financial Supervisory Service (FSS), told a parliamentary hearing on Monday that the FSS and the Financial Services Commission (FSC) regard a potential US listing as conflicting with rules against dual listings of parent and subsidiary companies.
Solidigm is reportedly preparing a float on the Nasdaq technology exchange and has already mandated investment banks for the job. Since August, South Korea has applied tougher rules to overseas listings by subsidiaries of listed groups. Management must undertake extensive protections for existing shareholders, including a detailed impact assessment and review by an independent special committee.
Breaches can bring financial penalties and a one-day suspension of share trading. Also unresolved is the legal question of whether the US subsidiary must complete a domestic registration process in Seoul. SK Hynix said no final decision has been made on the plans.
Investors fear that a separate listing would dilute their holdings and keep the parent company trading at a persistent valuation discount. A US float could raise substantial funds for planned investment in an American NAND plant, but market watchers point to the risks for domestic shareholders.
A KRW 2 trillion backstop for the supply chain
Even as the share price struggles, SK Hynix is shoring up its domestic production network. Together with state policy lender K-SURE and four commercial banks, the chipmaker launched a credit guarantee programme worth KRW 2 trillion for suppliers. SK Hynix and the participating financial institutions are contributing a combined KRW 100 billion, while K-SURE provides the guarantees.
The package is designed to cut financing costs for smaller partner companies buying inputs and expanding production, with interest rate relief doing the heavy lifting.
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