What Happened?
Shares of memory chips maker Micron (NASDAQ: MU) jumped 6% in the afternoon session after the company announced a massive expansion of its domestic manufacturing, raising its planned U.S. investment to $250 billion through 2035.
Notably, the company announced a $50 billion increase to its long-term capital expenditure plan, reflecting skyrocketing demand for the high-bandwidth memory that powers artificial intelligence. To support the buildout, Micron committed up to $3 billion to strengthen its domestic supply chain. This includes $500 million in strategic financing for GlobalWafers to expand a 300-millimeter raw silicon wafer facility in Sherman, Texas. Crucially, the investment comes with a 10-year supply agreement, guaranteeing Micron the raw materials needed for advanced DRAM production. As AI data centers drain global memory capacity, raw material bottlenecks have emerged as a critical risk. Ben Tessone, Micron's chief procurement officer, stated that securing these inputs is "essential to supporting Micron's long-term growth and technology roadmap." By locking down capacity with the only vendor currently approved by the CHIPS Act to fabricate advanced 300mm wafers on U.S. soil, Micron is de-risking its revenue targets. A risk to note is the sheer cost of this domestic expansion: a $250 billion multi-decade price tag underscores how fiercely capital-intensive the memory industry has become.
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What Is The Market Telling Us
Micron’s shares are extremely volatile and have had 56 moves greater than 5% over the last year. In that context, today’s move indicates the market considers this news meaningful but not something that would fundamentally change its perception of the business.
The previous big move we wrote about was 7 days ago when the stock dropped 6.9% on the news that a class-action lawsuit, significant insider selling, and a broader sector-wide selloff prompted investors to take profits.
The stock's decline occurred despite the company recently reporting record-breaking earnings, leading to a classic "sell-the-news" reaction after a significant rally. Adding to the pressure, a class-action lawsuit filed in late June accused Micron and competitors Samsung and SK Hynix of conspiring to fix prices by limiting the production of certain memory chips.
Furthermore, regulatory filings revealed that CEO Sanjay Mehrotra sold over $45 million in stock, fueling concerns about a potential short-term valuation peak. The negative sentiment was compounded by a sharp selloff in Asian semiconductor stocks, particularly South Korean rivals SK Hynix and Samsung, signaling a broader investor rethink of the AI memory sector. News that SK Hynix is planning a U.S. listing and that Apple may source memory from a Chinese rival for its devices sold in China also weighed on the stock.
Micron is up 219% since the beginning of the year, and at $1,007 per share, it is trading close to its 52-week high of $1,080 from June 2026. Investors who bought $1,000 worth of Micron’s shares 5 years ago would now be looking at an investment worth $12,783.
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