AI data and content creation could lift Seagate's and Western Digital's cross-cycle earnings even if supply catches up and pressures prices and margins. Western Digital reported hyperscaler demand signals through 2030/31, making 2013-2024 normalized earnings a poor baseline. Still not a huge fan of their stocks given their large premium to memory makers and Toshiba's production ramp. x.com  x.com 

Seagate and Western Digital trade at a huge multiple premium to other storage and memory, driven by vibes rather than cash flow, and Toshiba's expansion undermines the stable duopoly that justified it. Per @wallstengine, Toshiba plans about $380M to double HDD capacity for AI data centers by FY2027. Toshiba is a generation behind, with ramp issues, and is not a material near-term threat to profits, but the market will price the broken duopoly. The charts are awful. x.com  x.com  x.com  x.com  x.com 

Seagate's gross margin jump to 57.8% from 52.7% shows pricing power in a supply-constrained hard-drive market. AI data needs storage, hyperscalers seek capacity, and HAMR packs more terabytes into existing factories; roughly 90% of big-cloud data sits on hard drives. Sales reached $4.2B and next-quarter guidance of $4.8B beats the Street's $4.53B. This cycle looks to be accelerating rather than peaking. Overweight, $1,050 target. x.com  x.com 

A supply response could compress Western Digital's pricing and margins, eroding its apparent cheapness. Its 2013-24 normalized earnings merit a look: even huge demand growth in other industries eventually drew supply and mediocre returns. A digestion/reset would hurt buy-and-hold investors, though the outcome is uncertain. Pre-AI economics were mediocre and unlikely to become amazing post-AI; TSMC's stronger pre-AI economics make its post-AI case better. x.com  x.com  x.com 

Toshiba's reported plan to expand hard-drive output makes Seagate's and Western Digital's pricing after 2027 much less certain. Their bull case leaned on all three HDD makers holding unit output flat; per Nikkei Asia, Toshiba will spend about ¥60B to double AI data-center HDD capacity by March 2028 and lift its share from just over 10% to 30%. Seagate's 2027 pricing is already contracted, so this hits the multiple rather than next year's numbers. Toshiba has not confirmed the report. x.com  x.com  … Show more

Hard drives from Western Digital and Seagate are shouldering the bulk of the AI revolution's storage, and physical AI taking off would add even more demand. x.com 

The valuation gap favors SK hynix and Samsung over Corning, Seagate and Western Digital. Companies trading at 20x are still called cheap while the memory makers trade at 2x; Corning is not cheap on a $4 run rate even with growth, and neither are Seagate or Western Digital. The gap should narrow as memory rises while HDD stalls. x.com  x.com 

Western Digital's HDD exposure is hard to get behind because hard drives are even more commoditized than DRAM and NAND. HBM, by contrast, is difficult to make. x.com 

Western Digital benefits from HDDs' low storage cost and growing cloud demand, with higher NAND prices adding pricing power. Nearline bit demand normally grows 20-25% with some deflation, while AI data growth now exceeds 30%; HDD costs ~$0.02-$0.03/GB versus ~$0.25 for NAND. Before AI, the consolidated, ~95% cloud-exposed market looked worth a low-to-mid-teens multiple of normalized EPS. Entry barriers are extremely high, but irrational competition among the three players is a risk. x.com  x.com  … Show more

Sandisk, Western Digital and Seagate are priced as if AI's borrowed demand is permanent. Server spending is growing 36.9% in 2026 and data center systems 31.7%, versus 10.8% for total IT, a gap funded by raided budgets, panic orders and record debt; data center debt issuance nearly doubled last year to $182 billion. Since April, P/S rose from 10.5x to 25.5x at Sandisk, 8.6x to 18.7x at Western Digital and 8.5x to 19.7x at Seagate. Stocks bought above 10x sales have historically lost money. x.com