Is AI 'one big bubble'? Behind the tech sell-off

A growing chorus of skeptics is questioning whether the AI infrastructure buildout — trillions of dollars in data center capex — will generate returns commensurate with the spend, with some calling it 'one big bubble.' NVDA sits at the center of this debate: $215.9B in revenue growing 65.5% YoY with 71.1% gross margins is a genuinely exceptional fundamental picture, but that picture is already widely known and heavily owned. The question the market is now asking is not whether AI is real, but whether the incremental dollar of capex is slowing — and what that does to NVDA's growth rate from here.

MSFT, whose Azure AI revenue has been a key demand signal, is growing at 14.9% YoY with 36.1% net margins — solid, but already priced for steady AI monetization. TSLA is a looser AI proxy (FSD, Dojo), but its -2.9% revenue decline and 4.1% net margins make it the most vulnerable to a risk-off rotation. The setup to watch: any deceleration in hyperscaler capex guidance or soft Azure/cloud growth in upcoming prints would validate the bubble thesis and could accelerate the sell-off across all three.