SK Hynix bounces back from $470B rout as AI chip demand faces scrutiny

SK Hynix, a South Korean memory chipmaker, has experienced a dramatic reversal in investor sentiment. After reaching an all-time high in June, the company's shares dropped 38%, erasing more market value in a little over a month than any other stock globally except SpaceX. This sharp pullback comes despite expectations that SK Hynix will report another quarter of record earnings this week, with the AI boom continuing to drive chip prices higher.

The source of investor skittishness is straightforward: concern that memory costs have become unsustainably high. As Andy Wong, head of multi-asset at Pictet Asset Management HK Ltd., observed, "The debate now is whether memory is taking too much of the pie," and the market wants confirmation that "anything can shift the perception that SK Hynix is squeezing too much margin out of the supply chain." The fear driving the selloff is that rising memory costs will eventually force customers—primarily hyperscalers building AI infrastructure—to reduce usage and switch to cheaper alternatives.

Multiple factors are fueling this uncertainty. Meta Platforms' recent announcement that it plans to sell excess AI computing power stoked concerns over demand sustainability earlier this month. Apple has flagged cost pressures and is reported to be lobbying for approval to buy memory components from Chinese competitors including CXMT Corp., signaling that even major customers are actively exploring alternatives. Samsung Electronics, the world's biggest maker of conventional memory chips, is also catching up to SK Hynix in high-bandwidth memory, adding competitive pressure.

The stock's recent listing of American depositary receipts has brought additional complications: the proliferation of leveraged exchange-traded funds tied to SK Hynix has unleashed unprecedented volatility, drawing global attention. Despite this turmoil, SK Hynix remains on track for another year of triple-digit gains, buoyed by its early lead in high-bandwidth memory for AI. However, the market's current focus is narrowly fixed on this week's full results from tech giants including Meta and Apple, as well as Samsung's full June quarter results—data that may either reassure investors or deepen fears that the hyperscaler spending cycle is moderating.

SK Hynix's steep decline reflects a fundamental tension in the current AI hardware cycle. The company rode the AI boom to record highs by establishing an early lead in high-bandwidth memory, a critical component for AI workloads. However, the $470 billion（約75兆円） rout in roughly a month signals that investors are reassessing whether cloud providers will sustain their capital spending at current levels—or whether they will seek to manage costs by reducing memory usage or switching to cheaper suppliers.

The company's recent listing of American depositary receipts and the resulting proliferation of leveraged exchange-traded funds tied to its shares have amplified this uncertainty, creating unprecedented volatility that has attracted global scrutiny. Meanwhile, signals from major tech firms compound the concerns: Meta's plan to sell excess AI computing power raised doubts about demand durability, and Apple's reported lobbying to buy memory components from Chinese competitors including CXMT suggests that even leading customers are exploring alternatives to manage cost pressures. Samsung, SK Hynix's larger rival in conventional memory, is also catching up in high-bandwidth memory, intensifying competitive pressure just as hyperscaler demand patterns come into question.

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