Economist who called the 2008 crash says the AI bubble has "less than a year to go"

• Companies have borrowed over $410 billion this year for AI and data center investments, with some investment-grade bonds yielding 7.23%, higher than some junk-rated debt and well above the 4.7% U.S. 10-year rate.
• Keen estimates revenue from serious AI users runs at only one-fifth of what firms are spending, and warns that GPU-based data centers become uncompetitive after 3-4 years, forcing costly reinvestment cycles that may not be justified.
• On gold, Keen warns it could fall during a crisis as investors sell to cover losses in other positions, cautioning that 'rather than hedging your bets, you amplify your risk' if leveraged investors need liquidity.

Summary

Key Warning: Economist Steve Keen, who accurately predicted the 2008 financial crisis, warns the AI bubble has "less than a year" before collapse. Keen estimates revenue from sustainable AI users runs at only one-fifth of current company spending levels, predicting massive losses ahead.

Financial Data:

• Companies have borrowed over $410 billion this year for data centers and AI investments
• QTS Realty issued $3.9 billion in bonds at 7.23% yield for a Microsoft-linked Georgia facility
• Investment-grade issuance hit records in June, July, and August 2025
• U.S. private debt stands at approximately 150% of GDP, down from 170% peak but still 85% of crisis levels

Main Arguments:

Keen compares the AI bubble to 1840s railway mania rather than 2008. Critical concerns include:

• Data center GPUs becoming uncompetitive after 3-4 years, requiring costly renewals
• Mismatch between capital expenditure and sustainable user revenue
• Risk of "patchwork bankruptcies" as companies struggle to service debts

Not a Banking Crisis: Keen emphasizes this differs from 2008—he's not forecasting a banking collapse but rather disrupted supply chains impacting company cash flows and debt servicing.

Gold Warning: Contrary to popular belief, Keen warns gold could fall during crisis as leveraged investors liquidate positions to cover losses elsewhere, rather than serving as a pure hedge.

Market Context: Keen argues markets focus excessively on government debt while ignoring more dangerous private sector debt. He dismisses Federal Reserve stress tests as inadequate, claiming they miss money creation dynamics. Current valuations are "priced for perfection" with CAPE ratios at second-highest levels in history.