On June 28, 2026, the Bank for International Settlements (BIS) released its Annual Economic Report warning that AI infrastructure investment has grown so large that leading firms can no longer fund it from operating cash flows alone — shifting to debt, private credit, and opaque 'circular financing' structures, with hyperscalers having issued over $100 billion in corporate bonds in 2025 alone.
The BIS — the central bank of central banks, based in Basel, Switzerland — just dropped its annual report, and one line stopped me cold: the AI capex boom has outgrown the ability of even the world's largest companies to fund it from their own cash generation.
That's a Free Cash Flow (FCF) story. FCF = Operating Cash Flow minus Capital Expenditure. When capex balloons faster than operating cash flow grows, FCF turns negative — even for a profitable company. A negative FCF company must go to external markets: equity raises, bonds, or private credit (loans from non-bank lenders like hedge funds and credit funds).
The BIS flags that hyperscalers — Amazon, Microsoft, Alphabet, Meta — issued over $100 billion in bonds in 2025. Part of this is now flowing through 'circular financing' deals where supplier contracts, equity, and debt are intertwined in ways that don't show up cleanly on a balance sheet. That's the alarm: economic leverage is higher than reported leverage.
As a CFO, this is the question I'd ask about any capex-heavy business: is this investment self-funding from operations, or are we quietly becoming dependent on credit markets staying open? When credit tightens — as the BIS warns it could — companies without positive FCF run out of runway fast.
The dot-com bust was a capex bubble. The BIS is asking whether AI is next. Whether it is or not, the lesson is the same: FCF is the oxygen. Debt is borrowed oxygen. Don't confuse the two.
📚 Learn the concept: Free Cash Flow
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