AI Boom Risks Collapse as $1.8T in Commitments Face Tightening Capital

The author frames the AI boom not as a technology problem but as a capital cycle problem. While acknowledging that AI is genuinely transformative, the piece argues that investors have extrapolated AI's eventual dominance backward into today's valuations and financed a decade or more of buildout in advance—a pattern the author notes has recurred with railroads, fiber optic cable, and the internet itself. In each case, the technology was revolutionary but investments far outpaced sustainable returns, destroying shareholder wealth despite long-term economic benefit. The specific danger with AI, the author contends, is the structural circularity: Nvidia and other suppliers are now financing their own customers, meaning revenue growth depends on capital availability rather than underlying demand. This creates reflexive dynamics where minor disappointments cascade—if AI customers spend less because financing tightens, compute orders fall, semiconductor earnings decline, and the multiple investors pay for those earnings compresses simultaneously, amplifying losses. The timing compounds the risk: the AI boom is reaching its most aggressive phase precisely when households are carrying record debt loads (American households held roughly $18.8 trillion as of the end of June 2026, with credit card and auto loan balances near all-time highs), as asset prices that have propped up household balance sheets face renewed pressure from higher rates, and as bond markets globally are signaling that risk is underpriced. The author's analogy—a poker table where the same chips circulate to create the illusion of wealth—suggests that even without fraud or irrationality, the system becomes fragile once the flow stops. Goldman Sachs estimates hyperscaler AI capex could reach $1.4 trillion in 2027, while Morgan Stanley calculates roughly $1.8 trillion in existing commitments, but these forecasts rest on the financing conditions remaining supportive, a assumption the author doubts will hold through the end of 2026.