Allocation gate:
Samsung vs SK Hynix: the HBM4/HBM4E allocation gate SK Hynix holds the HBM lead with locked order volume; Samsung carries a structural discount and must convert HBM4/HBM4E qualification into production allocation at the stack, deciding whether its relative discount narrows or widens. SK Hynix HBM leadership holds majority order volume next-gen AI accelerator platform 1 Samsung chases HBM share recovery after documented HBM4 yield setbacks 2 HBM4E samples shipped structural discount despite DRAM lead + bigger memory profit wider vs narrower 3 record margin must hold memory engine carries MX loss squeezed by those memory prices 5 4 order volume locked DRAM wafer base reallocated to HBM displaces DRAM supply HBM4 12-hi stack logic base die interposer 6 outcome branch HBM lead holds order volume locked discount narrows HBM4 share gains discount widens qualification slips or demand collapse 1 HBM lead 2 recovery 3 discount 4 qualify 5 margins 6 outcome
Samsung sits at the allocation gate: HBM4/HBM4E qualification is not yet production allocation, so the structural discount holds.