The Bank for International Settlements has cautioned that the unprecedented surge in AI investment could evolve into a damaging boom-and-bust cycle if spending continues to outpace sustainable returns. In its Annual Economic Report, the five largest hyperscalers are on pace to spend more than $1 trillion on AI-related capital expenditure across 2025 and 2026 combined — a scale already outpacing their earnings and free cash flow, forcing some to issue debt to cover the gap.
Drawing parallels with the railway, canal, and dot-com booms, the BIS notes each historical episode began with a genuine technological breakthrough that drew more capital than commercial returns could justify, and each ended with an investment reversal that triggered economy-wide recessions. BIS General Manager Pablo Hernández de Cos said the race to capture market share may have led to overinvestment.
The report flags financing structure as a key vulnerability. The BIS highlighted "circular financing" deals blending equity, debt, and supplier-client contracts — such as chipmakers and hyperscalers taking stakes in AI labs that then commit to long-term chip or computing purchases, with terms of such arrangements often poorly disclosed.
Systemic risk is a growing concern: a large share of AI-related debt flows through private credit channels and hedge funds rather than traditional banks, and BIS Asia-Pacific representative Zhang Tao warned a correction could unwind "much faster than previous banking crisis episodes" given this lighter regulatory oversight.
While AI remains a transformative technology — the report acknowledges productivity gains of 20% to 50% in time savings at the task level — the BIS's message is that disciplined investment, transparent financing, and prudent governance will determine whether the boom lands softly or ends in a broader financial reckoning.
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