"The sell-off looks absurd," Yahoo Finance's Brian Sozzi said. Micron Technology shares slid roughly 6 percent to about $844 on Thursday, while SanDisk and Western Digital plunged double digits as a broader reassessment of memory and storage valuations rippled through the semiconductor group. The market reaction followed fiscal-quarter reports from SanDisk and Western Digital that beat revenue and earnings estimates but carried guidance below the sky-high expectations priced into shares. Attention now turns to Micron's fiscal fourth-quarter 2026 reporting window for clues on HBM and DRAM ramps.
"The sell-off looks absurd," Yahoo Finance's Brian Sozzi said. The line captured the surprise that met solid quarterly numbers from two major storage suppliers on August 6, and the way markets punished anything that failed to promise exponential growth.
SanDisk reported fiscal fourth-quarter revenue of $8.97 billion and adjusted earnings of $39.25 a share, and then guided its September-quarter revenue to a range with a $10.55 billion midpoint that sat below some Street forecasts. Western Digital also posted results that beat revenue and earnings estimates, but both companies saw their shares tumble in early trading on August 6. SanDisk fell about 11 percent and Western Digital declined about 16 percent in the session. The Roundhill Memory ETF dropped about 7 percent as the reassessment rippled through thematic vehicles.
Guidance, not demand
Analysts and market commentators framed the mismatch as a guidance problem rather than a demand problem. Coverage noted management disclosures of extended contract visibility that point to multi-year demand from data centres, including large long-term deals. SanDisk management said the company had signed multiple long-term agreements that underpin revenue visibility. That didn't stop profit-taking, because many sell-side models and investors had priced faster second-half expansion into equity valuations. The result was steep selling when guidance was solid but not stratospheric.
The pattern matched recent episodes elsewhere in semiconductors where companies reported strong results yet drew selling for forward commentary that disappointed elevated expectations. Pre-market and early trading weakness spread into memory-chip suppliers and AI-focused semiconductors more broadly. Reports cited declines for SK Hynix, AMD and Nvidia in varying degrees during the same window, and Nasdaq 100 futures ticked lower as investors reassessed an overcrowded trade.
Where Micron fits
Micron was a notable casualty of the sector move, with early trading showing a roughly 6 percent drop to the mid-$800s. The fall was meaningful, but not the rout seen in some peers.
Market coverage treated Micron's slide as part of a broader expectations reset across memory and storage, rather than as an idiosyncratic failure.
Commentary around the sell-off emphasised a structural bull case that remains in place: AI-driven demand for high-bandwidth memory and data-centre DRAM. At the same time, near-term risk sits in cyclicality of pricing and how sensitive valuations are to sequential guidance. Investors who had chased large year-to-date rallies in names like SanDisk, which rallied as much as about 469 percent YTD before the print, and Western Digital, up roughly 202 percent YTD, showed low tolerance for anything less than blowout outlooks.
The episode underlines a simple recalibration. Strong quarterly results can no longer guarantee a steady share-price lift when market models bake in rapid acceleration. Where companies can point to multi-year contracts and visible demand, the market has treated those disclosures as partial reassurance rather than proof that near-term growth will beat already lofty forecasts.
The core demand story is intact. Coverage repeatedly pointed to contractual commitments and extended visibility as evidence that data-centre demand will support multi-year growth in memory and storage, even if the pace of expansion is more gradual than some had modelled.
Market attention will now shift to Micron's fiscal fourth-quarter 2026 reporting window and any management commentary that clarifies the pace of HBM and DRAM ramps, capacity expansions and contractual commitments. Originally reported by 247wallst.com.
This article was created with AI assistance.
