Micron's Stock Is Down 17% in a Week. The Company Says It's Never Been Stronger.

Micron's stock drops 35% from record highs despite pre-selling all HBM4 capacity and securing $18B in deposits. A Korean sell-off and TSMC's capex hike triggered the correction.

The disconnect is glaring. Micron has sold every HBM4 chip it can make through next year, signed 16 take-or-pay contracts backed by $18 billion in cash deposits, and locked in a parade of automakers from General Motors to Hyundai Mobis. Yet the stock closed at €712.70 on Thursday, down 17% in a single week and 35% from the June record of €1,103.80. The relative strength index sits at 38.7 – technically oversold, but not yet a signal that the bottom is in.

None of the selling came from Micron itself. The first shockwave originated in Seoul when brokerage KIS cut its earnings estimate for SK Hynix by 8% below consensus, citing slower HBM4 deliveries and heavy contract concentration. SK Hynix suffered its biggest single-day loss on record – 15% – and the Roundhill Memory ETF, which packs Samsung, SK Hynix and Micron into 73% of its net assets, dropped 9%. A Korean problem became a global one overnight.

Days later, Taiwan Semiconductor delivered record quarterly numbers but simultaneously lifted its 2026 capex forecast to $60-64 billion, up from $52-56 billion. The market responded not with applause but with a sharp question about cost. If TSMC needs to spend that much more just to keep pace, what does that say about the entire AI supply chain's margins? For nervous holders of memory stocks, it was reason enough to hit sell.

What makes this sell-off unusual is the structural strength buried inside Micron's order book. The company has quietly assembled a portfolio of non-cancellable five-year contracts spanning 2026 to 2030. The counterparties range from four hyperscalers to nine small auto suppliers, and the deals are structured as take-or-pay agreements secured by $18 billion in cash deposits and another $4 billion in letters of credit. In previous memory cycles, customers could walk away with little penalty. That safety net simply didn't exist.

On the automotive front alone, Micron has signed separate supply agreements with Qualcomm, Visteon, HARMAN, JOYNEXT, DENSO, Astemo, Hyundai Mobis and General Motors – all for connected-vehicle memory that requires multi-year planning stability. The company has also confirmed that its entire HBM4 capacity for 2026 is already pre-sold at fixed prices, and that the HBM4 production ramp is running twice as fast as the prior HBM3e-12 high generation.

The bull case rests on that scarcity. With demand expected to remain strong into 2027 and the analyst consensus price target standing at €1,297.58 – more than 80% above current levels – the argument is that Micron's revenue visibility is unparalleled in its history. The stock is still up 629.93% over twelve months and 164.94% year-to-date. The recent correction, however violent, began from an extraordinary altitude.

The bear case, however, draws on three risks that no amount of contracted revenue can fully neutralize. The first is geopolitical: Washington is reportedly weighing tighter export restrictions on HBM chips, a move that could cut Micron off from key markets and undermine the very scarcity that supports its margins. The second is competitive: Chinese memory maker CXMT is planning an $8.5 billion IPO, and while export controls keep it out of premium AI server memory today, its increasing capacity threatens the commodity DRAM segment. The third is a looming supply glut: new fabrication capacity from multiple manufacturers, including Micron itself, is expected to come online from 2027, accelerating through 2028-2029 and potentially normalizing prices.

Investors will get the next major data point on August 10, when Micron management takes the stage at the KeyBanc Capital Markets Technology Leadership Forum. The market will be listening for updates on HBM4 yields and the status of trade licenses. A clear signal that export curbs will remain moderate could trigger a return toward the 50-day moving average of €824.56. A confirmation of restrictions would open the door to a test of the 100-day line at €601.17.

Until then, the stock remains caught between a record revenue base and a volatile macro mood that no single company can control. The annualized 30-day volatility of 103.69% tells the story: Micron now trades with the swings of a speculative growth name, not a mature memory manufacturer. The safety net is in place. The question is whether it will hold.