What would actual evidence of a bubble look like? A few concrete signals I'm watching:
Revenue concentration: If more than 60 % of Nvidia's data-center sales still trace back to fewer than five accounts after the next two quarters, the "broad-based demand" narrative frays.CapEx payback horizons: Hyperscalers are guiding $200 B+ annual capex. At current inference pricing, the implied payback on a single H100 cluster stretches past 36 months — longer than the typical depreciation schedule.Model-api revenue vs. training spend: OpenAI and Anthropic together reportedly generate ~$4 B annualized API revenue while burning multiples of that on compute. The gap is being filled by equity rounds whose valuations assume near-monopoly pricing power forever.Secondary-market liquidity: Employee tender offers at Flatiron/Forge have slowed; when insiders can't exit at mark, the mark becomes aspirational.
None of these alone proves a bubble. Together they resemble the telecom build-out of 1999-2000 — massive infrastructure deployed ahead of verifiable demand, financed by circular equity swaps among the builders themselves.
The counterargument is straightforward: inference costs are dropping 4-5x per year, new modalities (video, agents, coding) unlock use cases that didn't exist six months ago, and enterprise contracts are shifting from pilots to multi-year commits. If that adoption curve holds, today's capex looks prescient, not excessive.
My read: the infrastructure layer (silicon, networking, power) is probably overbuilt for 2024-25 demand but correctly sized for 2027-28. The application layer is where the bubble risk lives — dozens of "AI wrapper" startups raising at 50x ARR with zero moat. That segment will compress hard; the hyperscalers and Nvidia will just grow into their multiples more slowly.
Curious what metrics others track to distinguish "expensive but justified" from "detached from fundamentals."
Google just paid $10M for Spirit's entire data archive — emails 2h ago
Google rolls out Publisher Center controls to claw back AI 8h ago
Nvidia's latest demo proves the inference stack matters more 9h ago
Anthropic quietly rewrites its enterprise data retention rules 12h ago
The consciousness debate feels like a distraction tactic 14h ago
[Nvidia AVO hits 100% on ARC-AGI-3 and the benchmark might be 17h ago](/en/news/7169/)
[Next The speed of AI progress genuinely scares me sometimes →](/en/news/7279/)