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Micron’s Best Week in 17 Years

Published May 9th, 2026

Micron Technology (MU) closed Friday at $746.81 — up more than 15% on the session alone — capping what CNBC called its best week since December 2008. That’s not a momentum blip. That’s a market fundamentally revaluing an entire category in real time.

Here’s the number that stops most people cold: MU is now up nearly 38% on the week and has surged roughly 80% over the past month. Its market cap crossed $840 billion, making it worth more than JPMorgan Chase.

The force behind it isn’t hard to locate — it’s the one thing every AI data center needs but no one built enough of: memory.

Why Memory, Why Now

Every headline in the AI buildout focuses on GPUs. Nvidia gets the glory. But inside those high-end AI servers sit enormous stacks of DRAM and NAND — the fast working memory and flash storage that make GPUs actually function at scale. And right now, there simply isn’t enough of it.

The supply gap is being confirmed not by analysts but by Micron’s own customers. Meta, Microsoft, and Amazon have each cited memory costs as a major budget driver for 2026, with Amazon’s CEO noting that memory costs had “sky-rocketed” with supply not meeting demand. These are operational disclosures from the firms writing the largest checks on AI infrastructure — not analyst projections.

Key customers are currently receiving only 50% to two-thirds of their required HBM volume due to supply constraints. Micron has confirmed that its entire calendar 2026 HBM supply — including HBM3E and HBM4 — is fully booked, with pricing and volume agreements locked in.

The Numbers

Micron reported fiscal second-quarter revenue of $23.86 billion — up 196% year over year from $8.05 billion in the same period last year. Non-GAAP EPS hit $12.20, versus analyst expectations of $8.60 — a 42% beat. Non-GAAP gross margins landed at approximately 75%. Operating cash flow was $11.90 billion for the quarter.

Then came the guidance.

For fiscal Q3, Micron guided to $33.5 billion in revenue — against a Wall Street consensus of roughly $22.4 billion. Gross margin guidance came in at approximately 81%. EPS guidance of $19.15 versus a consensus of $10.50. As management noted on the call, that single-quarter revenue guidance exceeds the full-year revenue for every year in the company’s history through fiscal 2024.

The HBM4 Angle — This Is Where It Gets Interesting

Micron launched volume HBM4 production in calendar Q1 2026, with shipments already underway. The product delivers bandwidth exceeding 2.8 TB/s and achieves pin speeds above 11 Gb/s — outperforming current JEDEC industry standards. Management expects to reach mature yields faster than it did with HBM3E. The company has also sampled its HBM4 16-high product, which provides 48GB of HBM capacity per cube — a 33% capacity increase versus the HBM4 12-high.

What changed structurally: HBM manufacturing is silicon-intensive. One HBM wafer consumes the capacity equivalent of three standard DDR5 wafers. As production shifts toward HBM4, that ratio increases further — simultaneously compressing available DRAM supply for PC and server markets and tightening pricing across Micron’s entire portfolio. New capacity doesn’t meaningfully help 2026. Micron’s Idaho fab contributes at scale in mid-2027. The Taiwan acquisition closed in Q2 2026 but contributes no meaningful wafer output until the second half of 2027.

Slight tangent, but it matters: SanDisk (SNDK) is running a nearly identical playbook on the NAND side. Fiscal Q3 revenue surged 251% year-over-year to $5.95 billion, with data center revenue alone jumping 645% to $1.47 billion. The company signed five multi-year supply agreements locking in $42 billion in minimum contractual revenue backed by over $11 billion in financial guarantees. Susquehanna has a $2,000 price target on SNDK. The memory trade is broader than just MU.

Bull / Base / Bear

• Bull: HBM4 ramp accelerates, hyperscaler capital expenditure stays elevated through 2027, multi-year contract coverage expands. Full fiscal 2026 revenue approaches or exceeds $100 billion. Stock continues toward $1,000+.
• Base: Supply gradually catches up late 2026 into early 2027, margins compress modestly but hold well above historical norms. Stock consolidates in the $650–$850 range.
• Bear: Memory industry history repeats — manufacturers over-expand capacity, AI spending slows, customers draw down inventory. Margins compress sharply. MU gives back a significant portion of its 2026 gains.

What Investors Should Watch

HBM capacity commitments and multi-year supply agreements are the critical signal. If customers continue locking in long-term contracts — as SanDisk has done with its $42 billion in minimum contractual obligations — that structurally changes the cyclicality argument. Micron’s management noted it expects supply conditions for both DRAM and NAND to remain tight well beyond 2026, with meaningful new industry capacity not arriving until at least the second half of 2028.

Also watch for DRAM inventory levels in the Q3 report. In past memory cycles, a buildup in DRAM inventory on the balance sheet was the earliest leading indicator of cycle deterioration — appearing before pricing or margins reflected any weakness. The 2022 peak followed exactly this pattern. That metric matters more than the revenue line right now.

Micron is participating in the J.P. Morgan Global Technology, Media and Communications Conference on May 20, 2026. Any commentary on HBM4 customer qualification progress, supply agreement coverage, and pricing trajectory for 2027 will be closely monitored by analysts.

The debate isn’t really whether Micron is a well-positioned company. It clearly is — the only U.S.-based manufacturer of advanced memory products, with sold-out HBM production, 81% gross margin guidance, and revenue growth that has outrun nearly every analyst model for three consecutive quarters. The real question is whether the AI memory shortage cycle lasts long enough — and the multi-year contract structure holds firm enough — to justify a market cap that crossed $840 billion this week.

The bull case has never been stronger. So has the historical precedent for what comes next when memory companies overbuild.

For informational purposes only.