SK Hynix reportedly eases HBM4 push as commodity DRAM margins surge

SK Hynix’s pivot from HBM4 back to commodity DRAM reveals the extreme volatility of memory market cycles. Technically, this delays co-optimization between AI accelerators and advanced packaging, straining CoWoS allocation and TSV yield ramp. Geopolitically, tightening U.S. export controls on high-bandwidth memory raise licensing risks for HBM4; shifting focus to mature-node DRAM sidesteps regulatory friction and cuts compliance overhead. Competitively, Micron may accelerate HBM4 customer lock-in, while Samsung could seize AI memory ecosystem leadership. Over the next 12–24 months, sustained high DRAM prices risk misallocated capex across the sector—should AI demand soften amid bloated commodity supply, a repeat of the post-2018 ‘super cycle’ crash becomes plausible.