Massive AI and cloud infrastructure spending by tech giants is flooding the market with new debt. For the first time since the 2008 crisis, this oversupply, not macroeconomic fears, is becoming a primary driver of market volatility and repricing risk for existing corporate bonds.

The current AI spending frenzy uniquely merges elements from all major historical bubbles—real estate (data centers), technology, loose credit, and a government backstop—making a soft landing improbable. This convergence of risk factors is unprecedented.

History shows that markets with a CAPE ratio above 30 combined with high-yield credit spreads below 3% precede periods of poor returns. This rare and dangerous combination was previously seen in 2000, 2007, and 2019, suggesting extreme caution is warranted for U.S. equities.

Widespread credit is the common accelerant in major financial crashes, from 1929's margin loans to 2008's subprime mortgages. This same leverage that fuels rapid growth is also the "match that lights the fire" for catastrophic downturns, with today's AI ecosystem showing similar signs.

Morgan Stanley predicts the AI investment cycle, plus M&A and capex, will drive a 60% surge in U.S. investment-grade bond issuance in 2026. This massive supply increase is expected to push U.S. credit spreads wider, even if the underlying economy remains healthy and demand is strong.

Unlike the dot-com or shale booms fueled by less stable companies, the current AI investment cycle is driven by corporations with exceptionally strong balance sheets. This financial resilience mitigates the risk of a credit crisis, even with massive capital expenditure and uncertain returns, allowing the cycle to run longer.

The expected wave of M&A and LBOs has not materialized, leaving the deal pipeline thin. This lack of new debt supply provides a strong supportive backdrop for credit spreads, allowing the market to absorb geopolitical volatility more easily than fundamentals would otherwise suggest.

Instead of an imminent collapse, the credit market is likely poised for a final surge in risk-taking. A combination of AI enthusiasm, Fed easing, and fiscal spending will probably drive markets higher and fuel more corporate debt issuance. This growth in leverage will sow the seeds for the eventual downturn.

Tech giants are no longer funding AI capital expenditures solely with their massive free cash flow. They are increasingly turning to debt issuance, which fundamentally alters their risk profile. This introduces default risk and requires a repricing of their credit spreads and equity valuations.