Samsung Electronics forecast second-quarter operating profit of approximately 89.4 trillion won, or roughly $59 billion, this week — about 19 times the year-ago figure. The print crystallises what 2026 has already made plain: the memory chip super-cycle has moved from forecast to financial statement.

What is actually driving the memory super-cycle?

Data centres are projected to absorb more than 70% of the high-end memory chips manufacturers produce in 2026, according to TrendForce. Contract pricing has followed.

Conventional DRAM contract prices rose 93-98% quarter-on-quarter in Q1 2026, then a further 58-63% in Q2. NAND flash contract prices climbed 85-90% in Q1 and 55-60% in Q2.

How is AI reshaping the supply equation?

HBM and conventional DRAM share the same fabs and silicon wafers. Because HBM commands far higher prices and margins, manufacturers have moved production lines toward it wherever possible.

That shift created two markets from one cause: a demand expansion in HBM, and a supply squeeze in conventional DRAM.

The constraint is technical, not just financial. HBM stacks multiple DRAM dies vertically and connects them through thousands of microscopic channels. Wafers must be thinned, and any defect ruins the entire stack. Yields stay below conventional DRAM levels, so additional capacity takes longer to come online.

Bank of America estimates AI-optimised memory requires three to four times the production capacity of conventional memory per unit. SK Hynix's chairman has warned that global memory supply is likely to remain roughly 20% below demand through 2030.

Who's winning in the order books?

SK Hynix begins trading American Depositary Shares on Nasdaq on 10 July, in a deal expected to raise around $28 billion — the second-largest share sale on record after SpaceX's $85.7 billion debut in June.

Micron's HBM capacity is sold out through 2027. Kioxia confirmed in January that its entire 2026 NAND output had been committed, with some hyperscale clients asking for supply agreements into 2027 and 2028.

Following Micron's latest results, BofA pushed its super-cycle timeline to the end of 2027, with a scenario extending to 2030.

How are the big three expanding capacity?

South Korea's government has announced a ten-year plan anchored by 800 trillion won (about $530 billion) of investment from SK Hynix and Samsung to build two new fabrication sites in the country's south-west. Micron has launched a separate $200 billion programme covering fabs and research.

None of the new capacity reaches volume production before 2027. Several large expansions will arrive at roughly the same time in 2028 and beyond — the point at which current supply discipline faces its real test.

What risks could break the cycle?

Apple has been in talks to source memory from CXMT and YMTC, both flagged by the Pentagon for alleged ties to the Chinese military. A deal would inject fresh competition against incumbents and hand both Chinese makers a marquee customer as they prepare public listings later in 2026.

For traders, leveraged and single-stock ETFs tracking South Korean memory names have amplified this year's rally. Kioxia and SanDisk remain up close to 600% year-to-date even after the recent pullback. Western Digital's forward P/E ratio has more than doubled, from around 12x to 29x, as investors priced in bulk storage demand.

The order book looks defensive through 2027. The harder question is what hits the tape when the new capacity lands.