MU Stock Down 6% This Week as Taiwan Union Authorizes Strike

MU stock is down roughly 6% so far this week, and the reason people are searching for it on Wednesday, October 7, is a labor vote that lands at the center of the world's DRAM and high-bandwidth memory supply chain. Workers at Micron Technology's Taoyuan plant in Taiwan voted 1,994 to 14, about 99% of ballots cast, to authorize a strike over the company's bonus plan. The stock changed hands near $1,045.56 in Wednesday trading, down about 1.7%, according to Yahoo Finance, after Barron's reported the week-long slide driven by rising Treasury yields plus the strike threat.

The authorization does not mean workers are walking out. Under Taiwanese labor law it gives the union the legal right to call a strike, and Reuters reported that the timing of any actual walkout is still under discussion. The union has asked members to take October 19 off for a rally in Taipei, which it said would not constitute a strike. The vote is the clearest sign yet that months of talks over how Micron calculates bonuses have produced no deal.

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The dispute is not about base pay. It is about the bonus formula. For fiscal 2026 the Taoyuan and Taichung unions want a one-off bonus worth roughly 83 months of salary per employee, and starting in fiscal 2027 they want Micron to replace its Incentive Pay Plan with a scheme that sets aside 15% of operating profit for worker bonuses, paid quarterly. Micron countered with what it called the largest bonus payout in company history: 35 to 68 months of pay for direct labor employees in Taiwan, with a minimum cash payout of NT$1.7 million, about $53,809, according to earlier Reuters reporting. Of the 2,012 union members who cast ballots, 1,994 voted in favor and 14 against, close to a clean sweep and among the clearest strike mandates a union can hand itself.

This threat arrives in the tightest memory market in years. J.P. Morgan Global Research estimates DRAM prices have risen more than 400% from the start of 2024 to the end of 2026. Micron says demand will exceed supply in 2027 and 2028, that more than 75% of its 2027 output is already committed, and that customers are already discussing 2028 supply. On top of that, the company reported a record fiscal Q4 with revenue of $54.23 billion and adjusted earnings of $33.42 per share, and it guided first-quarter fiscal 2027 revenue to about $61.5 billion. None of that demand softness shows up in the numbers; the risk is that a strike disrupts production it already cannot fully meet.

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The vote also follows a separate overhang. On October 6 the company said it signed a patent license and settlement with Netlist that resolves all pending disputes, paying $600 million over five years for access to Netlist patents covering server DIMMs and high-bandwidth memory. The terms lock in intellectual-property access for the AI memory thesis, but the market's attention on the day has been the labor side, compounded by a chip complex selling off as the 10-year Treasury yield climbed above 5.3%.

There are two more things to watch, and both are dated. A second mediation session with the Taichung union, which represents part of Micron's roughly 15,000 Taiwan employees and sits on the same bonus issue, is planned for later this month. And the union has publicly said no strike will begin before the October 19 rally. Until a walkout is actually scheduled, the production risk is threat rather than fact. The scale of any real disruption would depend on timing, duration, and scope, and a memory maker that sells every bit it can make has little tolerance for a stoppage it did not call.

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For MU stock, the balance is unchanged on the fundamentals and newly uncertain on the labor front. The record quarter and the 75% pre-committed 2027 supply are real; so is a union that just handed itself a 99% mandate and a second factory still negotiating. The next number that matters is not a mic-percent price target, it is a date. Watch the Taichung session and the October 19 rally for whether the mandate becomes a stoppage.