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Micron Technology just had the kind of month that makes portfolio managers reach for the antacids. After hitting all-time highs above $1,200 per share in June 2026, driven by insatiable AI demand for high-bandwidth memory, the stock cratered as much as 22% in July. The culprit isn’t a deterioration in fundamentals. It’s a company most Western investors had barely heard of a few months ago.
ChangXin Memory Technologies, or CXMT, raised approximately $8.6 to $9.8 billion in its IPO on the Shanghai STAR Market, then proceeded to do something that grabbed the attention of every semiconductor investor on the planet: its shares surged over 466% from the debut price, catapulting the company to a market capitalization of around $484 billion.
The selloff in numbers
On July 15, 2026, Micron shares dropped as much as 8% intraday as the market digested what CXMT’s rise could mean for the cozy three-player oligopoly that has dominated the DRAM market for years. Micron, Samsung, and SK Hynix have long enjoyed the benefits of limited competition, a dynamic that has supported pricing power and healthy margins. CXMT’s emergence as the world’s fourth-largest DRAM producer is poking holes in that thesis.
The July decline of 22% marked Micron’s worst monthly performance in over a decade.
What CXMT can and can’t do
CXMT is big, it’s well-funded, and it has Beijing’s full backing. What it doesn’t have is access to the tools needed to make the most advanced memory chips. Specifically, CXMT lacks EUV lithography equipment, the cutting-edge machines manufactured by ASML that are essential for producing the kind of high-bandwidth memory chips that AI data centers are devouring.
AI-grade HBM chips require manufacturing precision that CXMT simply cannot achieve with its current toolset. US export controls, in place since 2023, have effectively blocked Chinese firms from acquiring the most advanced semiconductor manufacturing equipment.
Micron’s fundamentals tell a different story
Micron’s fiscal Q3 2026 earnings came in robust, powered by surging demand for HBM products tied to AI applications. Management revised guidance upward, signaling confidence in continued momentum.
The Chinese market itself adds another layer of complexity. China represents about 20% of Micron’s revenue, a chunk that has been progressively restricted by US export controls.
What this means for investors
In commodity DRAM, Chinese competition will likely intensify, pressuring margins on lower-end products. But in HBM and other advanced memory technologies, the moat remains deep as long as export controls hold. Any change in US trade policy toward China would be the single biggest variable to watch.
A 22% drawdown from all-time highs, combined with upward earnings revisions, means the stock trades at a more attractive multiple than it did just weeks ago.
Samsung and SK Hynix face the same CXMT pressures, which means this isn’t a Micron-specific problem. It’s a sector-wide repricing of risk.
Disclosure: This article was edited by Editorial Team. For more information on how we create and review content, see our Editorial Policy.
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