The central bank of central bankers is side-eyeing the AI boom
The Bank for International Settlements — basically the central bank clubhouse’s hall monitor — used its 2026 annual report to warn that the AI story may be getting a little too spicy. The worry isn’t just “AI stocks are expensive.” It’s that a growing chunk of AI capex is being financed with debt, and when the debt pile grows faster than the cash flow, the whole thing starts looking less like a revolution and more like a stress test.
Why this matters to your portfolio
This is the kind of warning that makes bond people sit up straighter and equity folks mutter, “okay, but what if the music stops?” The BIS flagged:
- widening credit spreads
- more private credit exposure
- circular investing, where money loops through the same AI ecosystem like a never-ending group chat
That combo raises the risk of contagion if one part of the trade snaps. If financing gets tighter, the companies promising the biggest AI buildouts may suddenly find the bill due faster than expected.
The part nobody likes to say out loud
The BIS also pointed to a tougher backdrop for policymakers. If an AI bubble burst collides with credit stress, inflation noise, and fiscal headaches, central banks may have less room to ride to the rescue than investors would like. That’s not exactly the “buy the dip and chill” setup.
Big picture: this doesn’t mean the AI boom is over tomorrow. It does mean the market is increasingly being asked to back up the hype with real cash flows instead of just bigger capex plans and more optimistic slide decks.