Shares surged as Micron began shipping the world's largest commercially available solid-state drive, a 245-terabyte monster designed to store nearly a quarter-petabyte of data on a single device. The semiconductor giant, with a market capitalization of $650 billion, has seen its stock surge 619% over the past year as AI infrastructure demand accelerates. The stock has gained roughly 28% in a single week, climbing from $517 to $661. The question: Does this product launch justify the rally, or is it priced-in exuberance?
This Drive Attacks the Biggest Cost in AI Data Centers
The 245TB drive dramatically increases rack-level capacity — up to 177 petabytes per rack — and requires 5.5x fewer racks than modern hard-drive configurations.
It consumes up to 30 watts at maximum power, only half the power consumed by a comparable-capacity HDD. For hyperscalers spending billions on real estate and electricity, that translates directly into lower operating costs — and a reason to buy Micron's premium-priced flash instead of cheaper spinning disks.
NAND Revenue Is Exploding, and This Product Feeds the Boom
In Q2 fiscal 2026, Micron's NAND revenues soared 169% year over year and 82% sequentially to $5 billion, driven primarily by strong demand for its data center SSD portfolio.
Analysts estimate fiscal 2026 total revenue at $110 billion (+194.5%) with NAND alone expected to hit $23.6 billion, up 178% year over year. The 245TB drive extends Micron's reach into "capacity-tier" storage — the biggest slice of the data center that hard drives still dominate.
Rivals Are Close Behind, and SSDs Still Cost 22x More Per Terabyte Than Hard Drives
Kioxia has announced a similar 245TB drive, and SanDisk has unveiled a 256TB SSD expected to ship in the first half of this year.
SSDs still cost up to 22.6 times more than HDDs on a per-terabyte basis — meaning adoption depends on buyers valuing power and space savings enough to pay the premium. That limits how fast this product can eat into the massive installed base of hard drives.
A 600%+ Rally Leaves Little Room for Disappointment
Morningstar views both the DRAM and NAND markets as highly cyclical, expecting Micron to "thrive in periods of strong demand and pricing but to be vulnerable to downcycles."
Every prior memory cycle has ended with 50%-plus drawdowns, and insiders have been selling shares, with senior executives disposing of stock in April at prices between $345 and $466. At a forward P/E of roughly 6x, the stock looks cheap — if this cycle's earnings hold. History says that's the biggest "if" in semiconductors.