The AI bubble question
Is the AI build-out a bubble or the biggest infrastructure cycle ever? · updated 2026-07-30
Big Tech capex is heading past $600B a year while measured AI revenue is an order of magnitude smaller. Whether that gap is a bubble or a rational bet on future demand is the sharpest disagreement in finance right now, and serious people sit on both sides.
The concern
The concern: revenue is not catching up, GPU fleets depreciate fast, valuations price in perfection, and AI capex is itself propping up GDP, so a slowdown would hit twice.
The counter-view
The counter-view: unlike 2000, the spenders are the most profitable companies in history using cash, not debt; compute is a scarce productive asset; and infrastructure overbuild historically leaves useful capacity even when investors lose.
Where it stands (July 2026): capex keeps accelerating, analysts keep publishing duelling frameworks, and nobody has the counterfactual. Not investment advice.