Micron's Record Year Meets a Week of Doubts, a Chinese Challenger and a Taiwanese Labor Dispute

Micron Technology closed Friday's session at EUR 781.80, down 5.9%, capping a week in which the memory maker's shares shed 15% in European trading. The retreat was part of a sector-wide pullback in semiconductor stocks, with market watchers pointing to mounting unease over whether the spending boom tied to artificial intelligence can hold its current pace.

The irony is hard to miss. The numbers Micron just posted describe a business firing on every cylinder, yet investors spent the week pricing in the next downturn.

A year of records, and a buyback to match

Fiscal 2026 will go into the books as a banner year: revenue of USD 133.19 billion and net profit of USD 84.97 billion, a testament to how aggressively data centers worldwide have scaled up. Gross margin in the fourth quarter climbed to 86.8%. Chief executive Sanjay Mehrotra said the resulting free cash flow will fund a share repurchase program of up to USD 35.16 billion, set to launch in December.

The structural forces behind those figures are not in dispute. AI accelerators consume enormous quantities of high-speed working memory, and Micron's manufacturing capacity at its new Taichung plant in Taiwan is already fully committed for all of 2027, according to chief operating officer Manish Bhatia, who spoke on Thursday. Supply in the high-performance segment remains extremely tight.

That is precisely where the skepticism sets in. When every production line runs at full tilt and customers sign long-term contracts, the market starts hunting for the peak of the cycle. Can a memory manufacturer whose decades-long history has been defined by violent swings escape that pattern for good?

CXMT's 4F² plans spook the sector

The nervousness of recent days was triggered largely by news from Asia. Chinese chipmaker ChangXin Memory Technologies (CXMT) has reported substantial progress on a denser 4F² DRAM cell design, and president Cao Kanyu said the company intends to bring a corresponding DDR5-RDIMM server memory product to market by the end of the year. The mere prospect of a tighter cell structure and fresh competition was enough to rattle investors.

Many observers consider the fear of a rapid Chinese flood of the market premature. Analysts at Citi noted that volume production of this memory architecture before 2028 is hardly realistic. What is more, the Chinese rival has so far disclosed nothing about yields, bandwidth or specific customers. No direct threat to complex AI memory components is yet in sight.

Morgan Stanley, for its part, argues that the current upswing in memory is far more durable than earlier cycles. The bank is sticking with its positive rating and expects the supply squeeze to persist well into 2028.

Beyond the data center

The growth story also extends well past server farms. Management sees physical AI as the next major driver: highly autonomous vehicles typically require more than 200 gigabytes of working memory and several terabytes of storage, and humanoid robots are likely to push technical requirements into similar territory.

Meanwhile, labor tensions are building in Asia. Taiwan's president Lai on Thursday urged both Micron's management and employee representatives to negotiate in good faith to avert a threatened strike. The dispute concerns bonus payments at the company's Taoyuan production site; the local union has already voted in favor of strike action but has not yet set a date.

Separately, mandatory filings with the US Securities and Exchange Commission dated October 13 disclosed several transactions by Micron executives and board members, including chief executive Mehrotra. The Form 4 submissions cover share awards, the vesting of contractual entitlements and transactions for tax withholding. Micron also published the risk factors chapter of its annual report on Form 10-K for the fourth quarter of fiscal 2026.

Against a backdrop of full coffers and contracted major customers, the recent correction looks like the familiar hesitation of a market that fears the old cycle while a new wave of industrial demand reshapes the memory business. Whether investors trust the logic of sustained memory hunger or keep pricing in the next slump will decide where the stock goes from here.