Western Digital Stock Falls 10% on Toshiba Capacity Expansion, AI Demand in Focus
Western Digital (WDC) stock fell 10.22% to $415.29 on October 2, 2026, after Toshiba announced plans to double hard drive production for AI data centers by 2027, raising supply concerns. Despite the drop, WDC reported strong Q4 2026 results with 44% sales growth to $3.75B and EPS of $3.56. Analysts maintain 'Buy' ratings with price targets around $650-665, citing strong AI demand and long-term supply deals.
How this was made

The 30-second read
Why it matters
The drop reflects market concerns over future HDD pricing, despite Western Digital's solid fundamentals.
Market read
A 10% intraday move driven by supply‑side news makes this a notable market‑mover event.
What to watch
Western Digital's sold‑out inventory through 2026 and long‑term supply contracts may cushion short‑term price impacts.
Background
Western Digital reported strong Q4 results and guidance, but its stock fell sharply after Toshiba's capacity expansion announcement.
Ticker impact
Western Digital shares dropped ~10% after Toshiba announced a major hard‑drive capacity expansion, raising supply‑price concerns.
likely pressure as the market prices in possible price declines from excess supply
The price move was immediate and directly linked to a fresh supply‑side catalyst; no mitigating news was presented.
Market effects
Hard‑drive manufacturers may see margin compression if Toshiba's capacity boost leads to price wars.
Asian HDD supply expansion could affect global storage pricing dynamics.
Potential ripple effects for data‑center storage costs and related tech stocks.
Counterpoint
Analysts note that AI‑driven demand remains strong, possibly offsetting supply pressure.
Key entities
- companyWestern Digital
US‑listed HDD and storage solutions provider.
- companyToshiba
Japanese electronics firm expanding HDD production.