Micron stock becomes battleground amid shifting AI narrative

Micron Technology hit a milestone that most chipmakers only dream about. In May 2026, the memory giant’s market cap crossed $1 trillion. By early September, the stock had given back roughly 23% of those gains.

The core disagreement is simple: is Micron a fundamentally transformed business riding a decade-long AI wave, or is it the same cyclical memory company that has burned investors before?

The numbers that fueled the rally

To understand the bull case, start with Micron’s fiscal third quarter of 2026. Revenue came in at $41.46 billion, a 346% increase year-over-year. Adjusted earnings per share hit $25.11, and gross margins climbed to nearly 85%, a record for the company.

The source of that pricing power is high-bandwidth memory, or HBM. Standard memory chips move data adequately; HBM moves it fast enough to keep AI accelerators like Nvidia’s H100s and B200s from sitting idle waiting on data.

CEO Sanjay Mehrotra stated that AI has “structurally transformed the memory industry,” noting that supply improvements will arrive gradually with no clear timeline for when capacity will actually meet demand.

For fiscal Q4 2026, the company guided revenue toward approximately $50 billion, significantly above what analysts had been modeling. The formal earnings report is scheduled for September 30, with an adjusted EPS projection of around $31.27 alongside that top-line figure.

The contracts that changed the conversation

The company has signed 16 Strategic Customer Agreements, which collectively carry $22 billion in customer commitments and $100 billion in performance obligations running through 2030.

These are take-or-pay deals, meaning customers are contractually obligated to buy a specified volume regardless of whether spot market prices move in their favor.

On September 15, 2026, Micron launched what it described as the world’s first 512GB DDR5 RDIMM, a memory module aimed squarely at AI data centers. The company claims the product delivers 1.4 times the performance of previous configurations while consuming more than 60% less power.

Where the bears make their case

SK Hynix, currently the leader in HBM production, is aggressively expanding capacity. Samsung, after stumbling in its early HBM execution, is working to qualify its latest chips with Nvidia.

Micron’s own guidance acknowledges that supply conditions are expected to improve post-2028. Record gross margins near 85% are, by definition, difficult to sustain.

The 23% drawdown from May’s peak reflects that tension. What the September 30 earnings report will clarify is whether Micron’s Q4 guidance holds, and what the company says about its fiscal 2027 trajectory.

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