A sharp after-hours sell-off in Intel (NASDAQ:INTC) stock and SanDisk’s (NASDAQ:SNDK) contrasting performance following its latest earnings underline an important distinction in the AI investment trade: strong demand does not automatically translate into stronger shareholder returns.
For UK retail investors, the results offer two perspectives on the semiconductor industry. Intel is struggling to convert surging demand for AI server processors into near-term earnings and cash generation, while SanDisk is benefiting from booming demand for data-centre storage and tight NAND flash memory supplies.
| Intel (NASDAQ:INTC) | Price: $68.67 (-25% after-hours) | Market cap: ~$486.60bn |
| Sandisk (NASDAQ:SNDK) | Price: $1,228.13 (-9% after-hours) | Market cap: ~$192.23bn |
How to invest in semiconductor stocks: A UK beginner’s guide 2026
1. Intel: AI demand is strong, but guidance disappoints
Intel shares suffered a dramatic after-hours reversal, falling more than 25% from their regular session closing price of $92.07 to around $71.
The reaction was particularly striking because Intel delivered a strong Q3 performance, beating management guidance across revenue, margins and earnings.
Intel Q3 2026 financial performance
| Metric | Q3 2026 | Year-on-year |
| Revenue | $16.5bn | +21% |
| GAAP gross margin | 43.0% | +4.8ppt |
| Net income | $3.3bn | -18% |
| Adjusted EPS | $0.52 | +126% |
| Operating cash flow | $5.1bn | — |
The standout performer was Intel’s Data Centre and AI division, which generated $7.3bn in revenue, up 78% year-on-year. Meanwhile, Client Computing revenue fell 5% to $8.1bn.
Chief executive Lip-Bu Tan highlighted exceptionally strong demand for Xeon server processors, with supply constraints preventing Intel from fully satisfying customers.
He also identified agentic AI as a potentially significant growth opportunity, suggesting the addressable market for server CPUs could expand from approximately $40bn to more than $200bn over five years.
However, investors were more concerned about the outlook.
Intel Q4 2026 guidance
| Metric | Q3 actual | Q4 forecast |
| Revenue | $16.5bn | $15–16bn |
| Adjusted gross margin | 44.1% | 38.0% |
| Adjusted EPS | $0.52 | $0.25 |
Three concerns explain the negative reaction:
- Manufacturing disruption: Problems at its Fab 28 facility are expected to cost approximately $300m in quarterly revenue and reduce gross margin.
- PC weakness: Higher memory prices and shortages are discouraging purchases. Intel expects Client Computing revenue to decline more than 20% sequentially in Q4.
- Cash flow: Intel expects 2027 to be an investment year, with higher capital expenditure and no positive free cash flow expected.
The last point is particularly important. Intel raised $23bn through an equity offering in August to support its turnaround. Investors now want evidence that its manufacturing investments can generate attractive returns.
2. SanDisk: AI storage demand drives extraordinary growth
SanDisk offers a contrasting perspective.
The memory and storage specialist reported its first-quarter fiscal 2027 results, comfortably beating expectations and delivering exceptional revenue growth.
SanDisk Q1 FY2027 financial performance
| Metric | Q1 FY2027 | Year-on-year |
| Revenue | $11.03bn | +378% |
| Adjusted EPS | $49.51 | — |
| Adjusted gross margin | 85.1% | +55.2ppt |
| Operating cash flow | $6.4bn | — |
| Adjusted free cash flow | $5.7bn | — |
| Data-centre revenue | $4.8bn | +1,682% |
Data centre revenue increased 61% sequentially, representing approximately 44% of group sales.
The figures demonstrate how AI investment is creating opportunities beyond conventional GPU and processor manufacturers.
As AI models become larger and inference workloads increase, hyperscalers need additional storage capacity to handle enormous datasets and retrieve information efficiently.
SanDisk is positioning itself to benefit from this trend. While high-bandwidth memory (HBM) and DRAM remain essential for high-speed processing, NAND-based SSDs provide additional, more economical storage capacity.
Management also highlighted the growing importance of key-value cache, which allows AI systems to retain information during inference.
SanDisk has secured eight customers through its New Business Models agreements, representing $93.9bn of minimum contracted revenue at floor pricing. Around half of its memory bit production is committed through these agreements in FY2027, rising to approximately two-thirds in FY2028.
SanDisk Q2 FY2027 guidance
| Metric | Q2 guidance | Analyst forecast |
| Revenue | $12.2–12.6bn | $12.29bn |
| Adjusted EPS | $55–57 | $53.35 |
| Adjusted gross margin | 84.5–85.5% | — |
Despite the impressive results and stronger guidance, SanDisk shares also retreated, falling 5.3% during Thursday’s regular session and another 7.5% after-hours.
Investors are questioning whether extraordinary growth and margins are sustainable, particularly given memory’s cyclical nature. Consumer revenue also fell 29% sequentially to $397m.
SanDisk’s eight-for-one share split, scheduled for November, will make individual shares more accessible but does not change its underlying valuation.
3. What does this tell us about the AI trade?
Three important themes emerge.
First, AI infrastructure spending is spreading. The opportunity extends beyond Nvidia GPUs to server CPUs, NAND storage, networking, semiconductor equipment and data-centre infrastructure.
Second, supply constraints are creating winners and losers. Intel cannot satisfy all its server processor demand, while SanDisk benefits from tight memory supplies and stronger pricing. However, higher memory costs are already hurting parts of the PC industry.
Third, valuation matters. SanDisk demonstrates that even extraordinary growth and strong guidance cannot guarantee rising shares. Intel shows that beating quarterly expectations is insufficient when future earnings and cash flow disappoint.
Sharesify investor verdict
| Company | Bull case | Bear case |
| Intel | Server CPU demand, agentic AI and foundry recovery | PC weakness, manufacturing disruption and cash-flow pressure |
| SanDisk | AI storage demand, pricing power and strong cash generation | Elevated expectations, cyclical memory pricing and customer concentration |
Intel remains a higher-risk turnaround investment, with significant potential if its server processor roadmap and manufacturing strategy deliver. However, investors need evidence of improving margins and cash generation.
SanDisk currently offers clearer evidence of direct AI infrastructure monetisation. Its growth, margins and cash generation are impressive, although elevated expectations leave little room for disappointment.
For UK retail investors, the wider lesson is that the AI opportunity remains substantial, but the next phase may reward companies converting infrastructure spending into profits and free cash flow rather than simply those announcing the biggest investment plans.
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