Memory — DRAM and NAND Market Structure
Three-supplier DRAM oligopoly, NAND fragmentation, the cycle from oversupply to recovery, and HBM's structural change
Memory is the part of the semiconductor industry where the rules are different. Unlike leading-edge logic — where TSMC, Apple, Nvidia, and a handful of others sustain durable structural margins because their products are differentiated and supply is short — memory is a commodity. One supplier's DRAM bit is interchangeable with another supplier's DRAM bit; one supplier's NAND bit is interchangeable with another supplier's NAND bit.
Pricing is set by the global gap between supply (capacity additions ramping at multi-quarter lag from capex decisions) and demand (smartphone and PC unit volumes, plus increasingly cloud and AI compute). When supply outpaces demand, prices crash 30-60% in months. When demand outpaces supply, prices double or triple in equally compressed windows.
The result is one of the most cyclical equity exposures available in the public markets, and one of the most fundamentally important to understand because memory cycles are the leading indicator of broader semiconductor demand.
That is the opening. Finishing a lesson is where it stops being interesting and starts being useful: the full lesson runs to 7 sections and ends with 6 practice questions. A free account is what opens the rest, and the other 255 lessons in the Academy with it. No card.
What this lesson covers
- 1The DRAM consolidation history — why three suppliers
- 2The memory cycle — supply additions versus demand growth
- 3Memory market structure — DRAM and NAND supplier shares, 2024 estimates
- 4HBM economics — why high-bandwidth memory is the structural shift in DRAM
- 5SK hynix 2024 — HBM leadership transforms the cycle profile of a memory IDM
- 6Where to see this on the platform
- 7Summary