BIS: AI Spending Boom Threatens Global Financial Stability

Context

The BIS - often referred to as the "bank of central banks" - has issued a formal warning about the trajectory of artificial intelligence investments. In an environment where global AI capex spending exceeds $300 billion in 2026 and sectoral concentration reaches historic levels, the BIS identifies the classic conditions of a bubble that could destabilize global financial markets and, in turn, the real economy.

Data

• Global AI capex 2026: >$300 billion (Goldman Sachs estimates, June 2026)
• Data center electricity consumption: ~945 TWh globally in 2026 (IEA, Electricity 2025)
• CoreWeave: documented liquidity tensions despite a valuation >$40 billion (Seeking Alpha, 22/06)
• S&P 500: weekly decline concentrated in tech mega-caps; Nasdaq-100 -3% on 23/06
• Coherent (28/06/2026): compute deflation - GPU prices drop despite capital influx
• Argentum AI: $4.1 billion contract for 27,000 GB300 GPUs signed on 23/06 - client undisclosed

Analysis

The BIS highlights the classic mechanism of an investment bubble: massive capital expenditures, concentrated among a limited number of players, financed by debt, and supported by expectations of future returns that remain largely hypothetical. The paradox pointed out by Coherent regarding compute deflation reinforces this diagnosis: investment is not yet translating into proportional returns for intermediate financiers.

Potential contagion follows two distinct channels. First channel: the balance sheets of hyperscalers (Microsoft, Alphabet, Amazon, Meta), which account for approximately 33% of the S&P 500's market capitalization, are now exposed to asset depreciation if AI models fail to generate revenues matching the expenditures. Second channel: energy providers and equipment manufacturers (GE Vernova, Eaton, Constellation) have structured their order books based on AI demand projections - a reversal would create cascading balance sheet effects on players with no direct link to tech.

The regulatory context amplifies the risk: the Moratorium Act (AOC/Sanders, 25/06/2026) and the warning from Exelon's CEO about a summer blackout risk (FT, 27/06) signal that physical infrastructure is reaching its limits even before the capex peak is crossed.

Probability-weighted scenarios

• Base scenario (50%): Gradual adjustment of tech valuations, consolidation of the specialized GPU sector (CoreWeave, Argentum AI), recalibration without recession. The Mag7 Q2 results in mid-July will serve as arbiter.
• Adverse scenario (30%): Contraction of AI capex spending post-July FOMC, triggering a systemic correction of the Nasdaq (-15 to -20% additional), spreading to exposed energy providers.
• Optimistic scenario (20%): AI revenues (Advantage+, Azure AI, AWS Bedrock) quickly catch up with expenditures by Q3, the BIS reintegrates the "tech soft landing" scenario - precedent: the 1999-2001 internet capex, whose productivity effects materialized in 2003-2007.

Portfolio implications

Reduce exposure to unprofitable "pure play" GPU-cloud players (CoreWeave-adjacent, unlisted AI startups). Favor players with demonstrated free cash flow (TSMC, ASML) over purely speculative ones. Monitor credit spreads of CoreWeave and highly capitalized SaaS bond issuers. Utilities exposed to AI demand (Vistra, Constellation) present an asymmetric profile: upside if demand holds, sharp correction if capex is revised downward.

Risks & blind spots

The BIS's main blind spot: AI could generate non-linear productivity gains that are not yet visible in macro data (typical lag of 18-24 months, cf. electricity/productivity in the 1920s). Hasty regulation (Moratorium Act passed) could itself trigger the confidence crisis it aims to prevent. [/ENCADRE]

Second blind spot: the BIS does not account for the shock-absorbing role of sovereign wealth funds (ADIA, GIC, Mubadala) now directly invested in AI infrastructure. [/ENCADRE]

To monitor

NERC July report on electrical grid constraints, Congress vote on the Moratorium Act, Mag7 Q2 results (mid-July), FOMC decision on July 29-30, CoreWeave credit spreads.