Shares of Western Digital plunged as much as 7.2% to $342.83 on October 15, caught in a triple squeeze: a broader tech selloff sparked by hotter-than-expected inflation data, mounting fears of Chinese memory-chip competition, and a notable price-target cut from UBS just one week before the company reports earnings on October 22. Western Digital's Profit Machine Hits a Wall of New Supply — Can Earnings Silence the Bears?
Shares of Western Digital cratered 7.2% to $342.83 on October 15, extending a punishing slide that has erased roughly a third of the stock's value in three months. UBS cut its price target to $470 from $525, warning that Toshiba's plan to roughly double its HDD output for AI data centers could erode the scarcity premium that powered the stock's gains earlier this year. The downgrade lands one week before WDC's October 22 earnings report, amplifying nerves in an already shaken market.
• Toshiba Wants to Break the Supply Squeeze That Made WDC Rich Western Digital's bull case rests on a simple formula: the company has benefited from constrained industry supply and favorable pricing, which drove margin expansion.
Toshiba currently holds about 17% of the HDD market versus WDC's 40%-plus — and now wants to double its share.
That directly threatens the supply discipline supporting WDC's margins as next-generation high-capacity drives roll out. If per-terabyte prices stall, margin expansion — the entire bull story — weakens.
• Five Straight Beats Haven't Stopped the Bleeding
WDC has beaten earnings five consecutive times, yet the stock keeps falling.
Its most recent quarter showed revenue of $3.75 billion (up 44% year-over-year) and EPS of $3.56 versus estimates of $3.29 — and shares still dropped roughly 10%. The market is pricing in future margin compression, not past execution. Gross margin climbed from 43.9% to 54.4% across fiscal 2026 , but investors fear that trajectory is peaking.
• The October 22 Report Is a Make-or-Break Moment
Analysts expect $4.08 EPS and $4.14 billion in revenue , within management's own guidance of roughly $4.1 billion in sales and 55%–56% gross margins. Hitting those numbers would show the supply-demand imbalance is holding — for now. Missing, especially on margins, would validate UBS's caution and likely trigger another leg down.
• A Wide Valuation Gap Signals Deep Disagreement
The Street-high target of $1,050 from Melius Research implies 175% upside , while UBS sits at $470 — a nearly three-to-one spread that reflects genuine uncertainty about whether AI-driven storage demand can absorb new supply. WDC trades at just 16× earnings versus 36× for close peers , suggesting the discount already bakes in risk — or warns that the current earnings surge is unsustainable. Next week's report will go a long way toward settling that debate.