SK Hynix has moved quickly from a strong Nasdaq debut to a test of investor confidence. Its U.S.-listed ADRs debuted strongly, but its Seoul shares then fell as traders took profits and reassessed HBM4 shipment expectations.

High-bandwidth memory is essential for advanced AI accelerators because it moves large volumes of data quickly. Changes in HBM supply, pricing or demand can affect memory producers, equipment suppliers, AI chip designers and cloud companies.

Potential winners

U.S.-listed memory alternatives

Micron is the clearest potential beneficiary because it competes directly in advanced memory and HBM. If SK Hynix’s difficulties are company-specific, customers may seek more supply from Micron, improving its market position and pricing power.

SanDisk is not a direct HBM rival, but it offers exposure to ...