Storage Stocks Slide as SanDisk Drops 17%
Memory-chip and hard-drive companies posted double-digit losses in a broad semiconductor selloff on November 5.
Updated on Nov. 5, 2026 in Semiconductors
SanDisk shares fell 17.09% on November 5, while Micron Technology dropped 12.57% and the Philadelphia Semiconductor Index lost 8.31%. Losses spread across memory-chip and hard-drive makers, with all six named stocks falling by double digits.
Why it matters
The decline reached across multiple parts of the storage supply chain at once, not just one company. Investors tracking the sector are watching how broadly the pressure spreads across memory and hard-drive names.
SanDisk's 17.09% decline exceeded the index's 8.31% loss by 8.78 percentage points, while Kioxia's ADR fell 15.20%, Western Digital 13.48%, Seagate 13.43%, and SK Hynix 10.80%. The source does not explain what drove the session's moves.
The players
SanDisk
SanDisk is a flash memory and storage company whose shares led the decline in the November 5 session.
Micron Technology
Micron Technology is a major U.S. memory-chip maker that is among the largest producers of DRAM and NAND flash.
Western Digital
Western Digital is a hard-drive and flash storage manufacturer that declined 13.48% in the session.
Seagate Technology
Seagate Technology is a hard-disk drive maker that lost 13.43% in the session.
The details
On November 5, shares of SanDisk, Micron Technology, Kioxia, Western Digital, Seagate Technology and SK Hynix all declined by double digits. The moves came during a session in which the broader semiconductor index also fell sharply.
Timeline
November 5, 2026: Storage-sector selloff; SanDisk shares fall 17.09%.
Market Landscape
The Philadelphia Semiconductor Index lost 8.31% in the same session, and the storage names fell harder than that benchmark. Their moves show the selloff concentrated in memory and hard-drive stocks rather than spreading evenly across the chip sector.
Storage stock swings like these can flow into retirement accounts and index funds that hold memory and hard-drive makers. Shoppers buying solid-state drives or external hard drives may see pricing shift as these companies' fortunes change.
The takeaway
Watch whether declines stay concentrated in storage names or spread across the broader semiconductor index. Investors with exposure to memory and hard-drive stocks should check how their holdings moved relative to the benchmark.
Further reading
Track more sector moves in the Semiconductors section.
