Why did Western Digital rise on 5 October?
Written after the close on
Western Digital +6.34%
Western Digital slipped over the last five trading days, going the other way while the broad market and the technology sector both rose clearly. Western Digital jumped sharply in the latest session, most likely because several Wall Street research desks spent the weekend arguing that Toshiba's planned expansion of hard-disk-drive manufacturing will not be enough to loosen today's tight supply of storage drives, easing a scare that had dragged storage names down. Earlier in the week the stock was also caught in a memory-and-storage selloff after word that SK Hynix may list its U.S. storage unit Solidigm separately, and in a pullback when OpenAI paused training of its most advanced AI models after a security breach, which raised doubts about near-term demand for hardware. What to watch next is the early-November earnings report, which should show whether AI-driven storage demand is still outrunning supply.
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Earlier weeks
Western Digital fell very sharply as Toshiba's output plan hit the storage trade. Western Digital, listed on Nasdaq, dropped hard in the last session after Toshiba said it would roughly double its hard-disk-drive production capacity for AI data centers, a move that threatens the pricing power of an industry with only three big makers; over the last five trading days it fell sharply while the broad market was roughly flat and the technology sector edged up, so the decline was company- and storage-specific rather than market-wide. The trigger was Toshiba's plan, announced that day, to spend about 60 billion yen (roughly $380 million) to expand its Philippines plant and lift its share of nearline storage — the high-capacity drives that sit in data centers — from just over 10% toward 30% by fiscal 2027, which investors read as the end of the "supply discipline" that had kept drive prices and margins high. Analysts at Morgan Stanley, Rosenblatt and Citi called the drop overdone, arguing Toshiba's addition is unlikely to close the supply gap through 2028 and that it does not make its own media and heads, so outside suppliers would also have to expand. Watch the early-November earnings report, where consensus looks for sharply higher profit and revenue, and whether rivals respond with capacity plans of their own.
Western Digital slips as AI-storage peers wobble. Over the past five trading days Western Digital drifted slightly lower, a bigger move than the broader market, which also eased, while the technology sector was broadly flat. The likeliest drag came from a memory-and-storage selloff after word that SK Hynix's Solidigm storage unit may be spun off in a US listing, which hit storage names hard, and from a pause in frontier AI model training after a security breach, which raised doubts about near-term hardware demand. Partly offsetting that, Western Digital's credit outlook was lifted to positive on surging AI data-center storage demand, and it announced a tie-up with Newegg Business around AI-ready network attached storage — jargon for storage boxes that many users reach over a network. Watch the early-November earnings report, where the market will weigh AI storage demand against valuation and supply worries.