# AI infrastructure stocks — X 热门讨论 (2026-09-27 10:18 UTC)
## @LondonRealTV (Brian Rose, Founder & Host of London Real) · 09-27 09:32 · ♥31 ↻3 💬0 Everyone is looking at this chart and seeing an AI bubble.
I see something more interesting.
The “AI Big 10” now represent ~41% of US market cap - roughly where previous major market bubbles peaked.
But there’s a critical difference:
Previous bubbles were largely built on expectations.
AI is already producing enormous revenues, profits and cash flows - while companies are spending hundreds of billions building the infrastructure for a new computing paradigm. That doesn’t make AI stocks immune to overvaluation.
It means the real question isn't:
“Is AI a bubble?”
It’s:
“How much of the future economics of AI is already priced in?” https://x.com/LondonRealTV/status/2104142054087635267