Morgan Stanley reiterates a bullish view on the HDD cycle, with STX as the top pre-earnings pick

Overview

This is a Morgan Stanley F4Q26 earnings preview for the North American IT Hardware/HDD sector, primarily covering Seagate Technology and Western Digital. The report argues that HDD fundamentals continue to improve, as AI-driven data generation, retention, and inference workloads are increasing hyperscaler demand for long-term capacity visibility, while tight industry supply-demand dynamics and pricing power should drive revenue, gross margin, and EPS revisions higher.

Core views

The core view of the report is that both STX and WDC are likely to deliver June-quarter results near the high end of guidance and provide September-quarter guidance above market consensus; pricing is the most important variable, with CY27-CY28 HDD pricing discussions moving toward $25-30/TB; STX is listed as the tactical top pick due to earnings catalysts and HAMR progress; although WDC lags STX on the HAMR timeline, its high-capacity HDDs and UltraSMR solutions still support margin expansion.

Analysis framework

The report evaluates earnings catalysts and mid-term EPS upside for STX and WDC by combining supply-chain checks, customer demand visibility, nearline HDD pricing, spot-versus-contract price gaps, HAMR capacity and yield progress, company guidance sensitivity, scenario valuation, and a risk-reward framework.

Methodology notes

• earnings_previewPre-earnings outlook and guidance sensitivity analysis

  Uses revenue, gross margin, expense, and EPS guidance as the core basis for assessing near-term catalysts.

  The report focuses on comparing June-quarter results and September-quarter guidance against MSe and Consensus for potential upside, arguing that pricing gains will drive both revenue and margin upside.

• industry_checksSupply chain and customer checks

  Validates cycle strength through HDD supply-demand dynamics, hyperscaler capacity reservations, spot pricing, and contract pricing discussions.

  Checks indicate cloud service providers are seeking capacity visibility through 2032, the industry faces an annual supply gap of 300-400EB, and spot EB pricing is materially above contract pricing.

• Valuation methodsScenario valuation / Risk Reward

  Builds bull, base, and bear cases based on CY27/CY28 EPS and different P/E multiples.

  The STX base-case target price is $1,035, based on CY27 EPS of $51.67; WDC's target price is $650. The report argues that, based on Morgan Stanley earnings forecasts, valuations are materially below the headline consensus-implied P/E.

Asset mapping & comparison

Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).

• Seagate Technology (STX.O)

  Core covered company, Morgan Stanley Top Pick

  Strengths

  Benefits from higher HDD pricing, HAMR progress, AI-driven cloud storage demand, and buyback potential; target price $1,035, bull-case scenario $1,446.

  Weaknesses

  The market worries that clean room expansion implies greater industry supply, and HAMR qualification and yields still require continued validation.

  Comparison

  Compared with WDC, STX is identified in the report as the tactical top pick ahead of earnings, with more advanced HAMR timing.

  Risks

  HDD demand below expectations, inability of gross margin to continue expanding, eSSD substitution, pricing normalization, and geopolitical and tariff costs.

• Western Digital (WDC.O)

  Core covered company, maintaining Overweight

  Strengths

  Benefits from high-capacity HDDs, UltraSMR, AI storage demand, and gross margin expansion; target price $650, bull-case scenario $920.

  Weaknesses

  Its HAMR timeline lags STX, and qualification and volume ramp timing still need validation.

  Comparison

  WDC has advantages in high-capacity HDD market share and UltraSMR, but trails STX on HAMR timing.

  Risks

  Delays in high-capacity product qualification, utilization and production expense pressure, tariffs, declining HDD pricing, and AI demand coming in below expectations.

• HDD industry

  A beneficiary sector of AI infrastructure data retention demand

  Strengths

  Strong supply discipline, a three-player oligopoly, high exposure to cloud customer demand, and lower unit capex requirements than other AI infrastructure segments.

  Weaknesses

  Over the long term, it still faces discussions around eSSD substitution and cyclical demand volatility.

  Comparison

  The report argues that the current HDD cycle should not be simplistically compared with the memory cycle, and that HDD gross margin and pricing upside remain at an earlier stage.

  Risks

  Greater-than-expected supply expansion, slower cloud capex, rapid declines in NAND/eSSD costs, or changes in data center storage architecture driven by open-source AI or the neocloud model.

Key data

• HDD supply gap300-400EB annually through CY28Industry checks indicate supply-demand tightness may persist through 2028.
• Long-term demand visibilitythrough 2032CSP customers are seeking capacity visibility extending through 2032.
• CY27-CY28 pricing discussions$25-30/TBHDD pricing negotiations are moving toward this range.
• Spot EB premium30-40%+Spot EB pricing carries a significant premium versus contracted volume.
• STX June-quarter expectationRevenue $3.50B-$3.55B; EPS $5.14-$5.33Expected to come in near the high end of company guidance.
• STX September-quarter guidance expectationRevenue $3.80B-$3.85B; EPS $6.10-$6.30Expected to be materially above Consensus, with gross margin of 53-54%.
• WDC June-quarter expectationRevenue $3.70B-$3.75B; EPS $3.34-$3.44Revenue is expected near the high end of guidance, with gross margin of 52-53%.
• WDC September-quarter guidance expectationRevenue $4.05B-$4.15B; EPS $3.95-$4.15Gross margin is expected at 54-55%, with EPS clearly above Consensus.
• eSSD versus HDD cost gap17-20xThe report believes the near-term risk of eSSD replacing HDD is limited.
• Valuation observationSTX/WDC about 16x CY27 base EPS; about 7x CY28 bull EPSThe report argues consensus underestimates earnings power, and the headline high P/E overstates valuation pressure.

Impact & implications

If the report's view proves correct, earnings and guidance from STX and WDC could drive a market re-rating of the HDD cycle and reinforce that AI infrastructure expansion benefits not only compute and semiconductors, but also the lower-capex, more supply-disciplined data storage segment. In the short term, earnings guidance and pricing commentary are the direct catalysts; in the medium term, HAMR commercialization, 40TB+ products, long-term cloud customer agreements, and declining unit costs will determine the sustainability of earnings.

Risks

• HDD pricing normalizes more than expected.
• AI-driven incremental HDD demand fails to materialize.
• High-capacity HDD or HAMR qualification and volume production progress is slower than expected.
• Cloud capex or the storage demand cycle is weaker than expected.
• Declining eSSD costs increase medium- to long-term substitution risk.
• Tariffs, geopolitics, and production cost pressures affect gross margins.
• STX or WDC guidance fails to come in materially above market expectations, causing the earnings catalyst to fade.

What to watch

• STX's July 28 and WDC's August 5 after-market earnings releases.
• Whether September-quarter revenue, gross margin, opex, and EPS guidance come in above Consensus.
• Management commentary on CY27-CY28 HDD pricing and $/TB trends.
• Whether long-term cloud customer capacity reservations, LTAs, and demand visibility continue to extend.
• Progress in HAMR yields, customer qualification, and ramp-up of Mozaic 4 and 40TB+ products.
• Whether the spread between spot EB and contract EB remains above 30-40%.
• Whether changes in NAND/eSSD pricing affect the assessment of HDD substitution risk.
• STX's capital allocation priorities, especially the trade-off between buybacks and deleveraging.