Industry Analysis
SK Hynix’s sharp stock correction reveals structural fragility in the AI memory value chain: HBM4, built on 3nm EUV, is a critical enabler for next-gen AI accelerators. Any delay in its ramp directly disrupts NVIDIA’s Rubin deployment and forces TSMC to reallocate CoWoS capacity. Under tightening U.S.-South Korea export controls, SK’s heavy reliance on ASML EUV tools heightens supply chain vulnerability. Samsung will likely accelerate HBM4 qualification to capture Microsoft and Amazon design wins, while Micron may push hybrid LPDDR5X+GDDR7 solutions for edge AI. If global AI capex growth falls below 20% over the next 18 months, SK Hynix risks collapsing gross margins and inventory pile-up—eroding its premium as the pure-play AI memory bet.
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