The Cycle Reached the Floor — The Week Every Memory Tier From HBM4E to NOR Flash Repriced Together

This week's data confirms the memory cycle has reached not its peak but its floor. Korea's May semiconductor exports came in at $29.4B, +154% YoY, following $25.2B (+158%) in April and $24.9B (+138%) in March — three consecutive months of triple-digit growth at record absolute levels. The same day, Taiwan's TrendForce reported H1 2026 cumulative contract prices rose 100-120% for NOR Flash and 130-150% for SLC NAND. And Korean media reported legacy DRAM (DDR4 and older) prices surged 150% in H1 alone, with more upside expected in H2.

These numbers are not separate dots. SK Hynix (000660) and Samsung's decision to reallocate wafers into HBM4 and HBM4E by trimming legacy lines — an allocation-hierarchy reset that started in Korea — is now lifting every layer of the global memory stack at once. The AI cycle did not just make one kind of memory expensive; it made every kind of memory expensive simultaneously.

Korea — The Contradiction at the Source

Korea's signals split in two this week. On one side, Samsung and SK Hynix escalated their HBM4E race for next-gen AI memory leadership. On the other, Korean commentary argued "in the AI era, memory is won by allocation, not capacity expansion" — meaning margin is decided by who you ship to, not how much you make. Where these two lines meet is ENF Tech's first hydrofluoric-acid supply to SK Hynix, which breaks the decades-long grip of Japan's Stella Chemifa and Morita Kagaku on semi-grade HF — a sign that Korean memory lines are running so hot that domestic substitutes are finally being qualified at scale.

Exports say it most plainly. May $29.4B, April $25.2B, March $24.9B — record absolute levels, but the operative point is that all three months held YoY above +138%. This is not ASP recovery alone; it is the cumulative product of ASP × HBM mix × legacy price lift. No single price could draw that curve. The DDR5 16Gb spot at $45.23 sits in the same envelope.

Taiwan — The Beneficiary of Vacated Capacity

The legacy slot Korea is vacating, Taiwan is filling. Taiwan's MOEA reported $8.43B in approved inbound FDI for Jan-May 2026, +53.8% YoY, with Micron (via its Singapore vehicle) alone pouring in $4.33B. Micron's Taichung fab expansion in DRAM and HBM capacity is the exact mirror image of Korea's HBM-first allocation: where Korean wafers move up the stack, Micron's capital bids for the bottom.

The equity reaction is even more direct. Foreign brokers raised Micron (MU) targets on a call for server DRAM to climb 40-45% in 2H 2026, and the stock approached a record $1,097. At the same time, Nanya and Winbond hit all-time highs. Nanya's DDR4 and LPDDR4 lines and Winbond's NOR and specialty memory — names treated as the cycle's periphery in prior upturns — moved to the center of this one.