Western Digital stock tumbled 11.7% after reports that rival Toshiba plans to spend $400 million to double its HDD production capacity by fiscal 2027, potentially increasing its market share from 17% to 30%. This could trigger price competition and margin compression for Western Digital, though analysts suggest the sell-off may be an overreaction given WD's valuation under 18x earnings.
Axe note: Toshiba’s aggressive expansion shakes Western Digital’s position, signaling tougher times for hardware makers.