Micron Stock Turns Lower as China's YMTC Rapidly Closes Gap in NAND Market Share
Miles Bennett
Micron fell as much as 1.68% intraday, while YMTC's NAND share jumped from 8% to 13% in one year — now level with Micron and Kioxia as China's storage challengers redraw the global memory map.
What happened to Micron's stock?
Micron (MU) rose as much as 1.5% pre-market to $1,080.42, then reversed after the open. The stock dropped as low as $1,046.26, a 1.68% intraday decline.
Over the past year Micron has rallied more than tenfold, buoyed by optimism over AI-driven memory demand.
This means → the share price has already "spent" a large amount of bullish expectations. Any marginal negative is enough to trigger a pullback.
Where does YMTC stand now?
Counterpoint Research data show YMTC's Q1 share of the NAND flash market — a type of storage chip that retains data without power — rose to 13%, up from 8% a year ago.
The global NAND landscape in Q1: Samsung led at 29%, SK Hynix at 18%, Kioxia at 14%; SanDisk, Micron, and YMTC each held 13%, tied in the chasing pack.
In plain terms = YMTC went from second tier to dead level with Micron in a single year. The gap is virtually gone.
How hot is the NAND market itself?
Global NAND revenue hit $46 billion in Q1, nearly doubling quarter-on-quarter and rising to 3.5× the year-ago level.
This reflects a replay of the sharp price rally DRAM experienced earlier — both supply and demand are firing at once.
YMTC is heading for an IPO — what does that change?
YMTC this month formally launched pre-listing regulatory review, moving toward an initial public offering.
Counterpoint Research director MS Hwang: "If YMTC gains additional capital through an IPO, it will have the conditions to expand capacity across the board."
This means → Counterpoint expects that, in that scenario, YMTC would overtake Kioxia and Micron to become the world's third-largest NAND maker.
Another Chinese memory firm, ChangXin Memory Technologies (CXMT), is also growing rapidly — the Chinese storage camp is expanding as a whole.
How much does this actually hurt Micron?
Roughly 80% of Micron's revenue comes from DRAM, including High Bandwidth Memory (HBM) for AI servers — the core profit-growth driver right now.
In plain terms = NAND is not Micron's lifeline. The direct short-term impact is limited.
But the shifting competitive landscape sends a warning: Micron's and its Korean peers' dominance in memory is not permanent — YMTC closed the NAND gap in one year, and there is no guarantee DRAM won't be next.
Content is for reference only, not financial advice.