Why Western Digital and Seagate are seeing big stock drops today
Western Digital (WDC) and Seagate (STX) shares fell 10.2% Friday after a Nikkei Asia report indicated Toshiba plans to double HDD production for AI by fiscal 2027, potentially impacting pricing power. Analysts note supply constraints and long-term demand may mitigate effects, with Seagate and WDC having technology and supply advantages.
How this was made

The 30-second read
Why it matters
The new supply outlook creates immediate downside risk for the two HDD makers, with analysts noting potential margin compression but also highlighting existing contract backlogs that may mitigate short‑term effects.
Market read
The fresh supply‑side news triggers a notable sell‑off in two major HDD makers, offering a short‑term trading opportunity.
What to watch
Long‑term contracts for 2027‑2028 capacity at both Western Digital and Seagate could cushion pricing pressure.
Background
The article links a 10% intraday drop in Western Digital and Seagate stocks to a Nikkei report about Toshiba's plan to double HDD production for AI applications in fiscal 2027.
Ticker impact
Western Digital shares fell 10.2% on Friday as investors fear Toshiba's planned HDD capacity expansion could erode pricing power.
likely further decline as market prices in potential margin compression.
The article reports a fresh 10% drop linked to a concrete supply‑side catalyst; traders can act on the downside risk today.
Seagate Technology shares dropped 10.2% on Friday after a Nikkei report that Toshiba will double HDD capacity for AI applications in FY2027.
downward pressure expected as investors reassess gross‑margin outlook.
Same‑day 10% move tied to a newly disclosed supply expansion makes the news actionable for short positions.
Market effects
Hard‑disk‑drive sector may see compressed margins if Toshiba adds capacity, affecting peers beyond the two named stocks.
Japanese HDD supplier expansion could shift supply dynamics in Asia‑Pacific data‑center markets.
AI‑related storage demand globally may be tempered, influencing broader tech hardware valuations.
Counterpoint
Toshiba's expansion may be slower than projected, limiting near‑term impact on Western Digital and Seagate.
Key entities
- companyWestern Digital
US‑listed HDD manufacturer (ticker WDC) experiencing a 10% stock drop.
- companySeagate Technology
US‑listed HDD manufacturer (ticker STX) also down 10% on the news.
- companyToshiba
Japanese conglomerate planning to double HDD capacity for AI, the catalyst for the price moves.



