Western Digital Tumbles as Rival Plans AI Storage Expansion

• Our read: EasyAlpha grades Western Digital Corporation C, indicating average quality compared to technology peers in the S&P 500, where solid profitability balances against stretched valuation while 80.8% of analysts maintain buy ratings.
• The day: Shares fell 10.2% to close at $415.29 after reports revealed a key competitor plans to double hard drive production capacity for AI data centers.
• Watching: The company's next scheduled quarterly earnings release on Thursday, October 29.

Western Digital fell sharply on Friday, October 2, ending the session -10.2% on trading volume of 3.6x the recent average. The decline followed reports that Toshiba plans to invest roughly $400 million to double its hard disk drive manufacturing capacity by fiscal 2027. Toshiba is targeting high-capacity storage for artificial intelligence data centers, aiming to expand its market share from roughly 10% to 30%.

The hard disk drive industry is concentrated among three major players: Western Digital, Seagate Technology, and Toshiba. Recent operating strength across the sector has been supported by tight supply and strong pricing power for high-capacity drives. A significant capacity expansion by a direct competitor introduces the possibility of easing supply constraints, raising concerns over future pricing power and margins.

EasyAlpha grades Western Digital C, reflecting average quality relative to its technology peers in the S&P 500. The strongest pillar in the company's file is profitability, supported by a profit margin of 73.0% and a return on equity of 130.8%. Recent business expansion has been solid, with quarterly revenue registering +43.8% year over year.

Even after Friday's pullback, the stock is +141.1% so far this year, though it now sits 48.1% below its 52-week high of $799.62. EasyAlpha points to valuation as the main vulnerability, with shares trading at 16.9 times trailing earnings and 22.8 times forward projections. Wall Street sentiment remains positive, with 80.8% of the 26 analysts covering the stock rating it a buy, carrying an average price target of $664.92 that sits 60.1% above Friday's close.