Micron Ships Next-Gen 256GB DDR5 Modules While a 9% Stock Correction Tests the AI Memory Thesis

Micron unveils 256GB DDR5 for AI data centers with 40% faster speeds and lower power; stock drops 8% despite record $33.5B Q3 guidance.

Micron has provided fresh evidence that its product pipeline is moving at full throttle, even as its share price taps the brakes. The memory maker delivered samples of a new 256GB DDR5 RDIMM module built on the 1-gamma process to key server-ecosystem partners, packing transfer speeds of up to 9,200 megatransfers per second — more than 40% faster than current production modules. The module also slashes power consumption by over 40% when replacing a two-module configuration, a critical advantage for AI data centers where energy budgets are under constant pressure.

Yet the stock that has ridden the AI wave to a 132% year-to-date gain just suffered its worst single-day drop in months, ending last week at €624.00, down 8.11%. The pullback leaves the shares roughly 9% below the recent peak of €685.40 and has nudged the relative strength index down from extreme territory, though at 77.0 it still signals overheated conditions. Over a 30-day window, the advance remains staggering at 62.54%, making the correction feel more like a necessary cooldown than a narrative break.

The timing of the DDR5 announcement is strategic. Micron is now working with platform partners to validate the modules for current and next-generation server generations, aiming for broad compatibility so cloud customers can quickly deploy them in AI and high-performance computing clusters. The move underscores that memory bandwidth, capacity, and efficiency are becoming as central to AI infrastructure as raw compute — and that Micron intends to own that part of the stack.

Attention now pivots to Wednesday, May 20, when Micron executives take the stage at the J.P. Morgan Global Technology, Media and Communications Conference in Boston. The session is widely seen as a sentiment litmus test. Investors will be listening for cues on HBM pricing, supply constraints, capital spending, and whether management sees the memory cycle lengthening. The bar is already uncomfortably high: Micron has guided for a record third-quarter revenue of $33.5 billion, plus or minus $750 million, with gross margins around 81%. That single-quarter revenue figure surpasses any full-year total the company achieved through fiscal 2024.

The numbers behind that guidance are eye-popping. For the current quarter, DRAM contract prices are expected to climb 58% to 63%, and Gartner projects an 125% full-year jump in DRAM pricing. Earnings per share are forecast at $18.90, up from $12.07 last quarter — a 57% sequential surge. The underlying driver is an unprecedented supply-demand imbalance. Micron expects DRAM and NAND markets to remain tight through at least 2026, with meaningful new capacity not coming online until 2028. At its Tongluo site, substantial additional shipments are not anticipated before late 2027.

The HBM story remains the core of the investment thesis. Micron has already locked in pricing and volume agreements for its entire HBM offering — including HBM4 — across calendar 2026. The company estimates the addressable HBM market will expand from roughly $35 billion in 2025 to about $100 billion in 2028, representing a compound annual growth rate of around 40%. That trajectory explains why the stock commands a trailing P/E of 35.26, well above its five-year median, despite a GF Value estimate of approximately $331 — far below current levels.

Against those valuations, insider selling has drawn notice. Director Steven Gomo sold 2,000 shares at roughly $787 apiece on May 16, and the past three months have seen seven insider transactions worth about $54 million, though most were described as routine. More broadly, the market is looking to Nvidia’s commentary on AI infrastructure spending as an indirect read-through for Micron. Comments from hyperscalers about memory demand and HBM procurement will shape sentiment until Micron itself reports earnings around June 24.

For now, the narrative is split. On one side, operational momentum is undeniable: the new DDR5 module, the locked HBM contracts, the supply constraints that run for years. On the other, the stock has run so far so fast that any hint of price weakness or demand softening could trigger a sharper correction. Wednesday’s conference in Boston will be the first real test of whether the two sides can converge — or whether the profit-taking has further to go.