Micron's 15% Weekly Slide Masks a Busy Fortnight of Plants, Patents and Pay Talks

Micron Technology shares closed Friday at EUR 781.80, down 5.9% on the day, capping a week in which the stock shed 15% as a broad semiconductor selloff swept the sector. The trigger was not a Micron-specific disclosure but a wider retreat from chip names, with market watchers pointing to mounting doubts over whether the spending boom tied to artificial intelligence can be sustained.

The weekly damage came alongside a pair of developments that had nothing to do with the selloff: a fresh assembly and test plant in Taiwan and a legal truce in the US.

Taichung Adds a Second Packaging Site

On Thursday Micron opened AATT2, its second manufacturing facility for assembly and test in Taichung, Taiwan. The plant expands capacity for advanced packaging — the precise interconnection work that modern memory technologies depend on. The move underscores that management is pressing ahead with infrastructure for AI hardware even as investors question the durability of demand.

Competitive noise added to the pressure. ChangXin Memory Technologies (CXMT) has reported meaningful progress on a denser 4F² DRAM cell design, according to company president Cao Kanyu, and plans to bring a corresponding DDR5-RDIMM server memory product to market by the end of the year. The announcement fed fears of rising competition for established suppliers such as Micron, though it does little to alter their standing in complex memory solutions.

A $600 Million Patent Settlement

Away from the factory floor, Micron secured legal clarity. A settlement with US developer Netlist ends years of patent litigation. Filings with the US Securities and Exchange Commission show Micron will pay $30 million per quarter from the fourth quarter of 2026 through the third quarter of 2031, for a total of $600 million — a bill that clears a long-standing hurdle.

Industry sentiment offered a counterweight. Media reports said Elon Musk sharply criticized the pricing policies of other memory manufacturers while singling out Micron's approach to future pricing for praise — a verdict from a prominent customer that supports confidence in long-term client relationships.

Labor Tensions in Taoyuan

Back in Taiwan, the situation on the ground demands a delicate touch. President Lai Ching-te urged Micron and its workforce to negotiate in good faith to avert a strike, according to Reuters. The dispute centers on bonus payments at the Taoyuan production site. The union there has already voted in favor of industrial action and called a rally in Taipei on October 19, while making clear the gathering does not itself constitute a walkout. The government's involvement highlights the site's weight in the global supply chain.

Separately, Form 4 filings dated October 13 disclosed a series of transactions by Micron executives and board members, including share awards, the vesting of contractual claims and tax-withholding moves. Chief executive Sanjay Mehrotra was among those named. Micron also published the risk factors chapter of its annual report on Form 10-K for the fourth quarter of fiscal 2026.

The Bull Case Holds

Despite the recent cooling, the stock is up 210% since the start of the year — a gain that explains why some market participants are quick to take profits when sector doubts surface. The capacity buildout in Taichung underpins Micron's technological leadership, while the resolution of the patent disputes provides clear ground rules. For those focused on the long-term role of high-performance memory in the AI era, the latest pullback looks more like a healthy consolidation than a change in the story.