AI Debt Now 15% of Corporate Bond Market, Creating New Concentration Risk

The article warns a new concentration risk is building in the corporate bond market as AI-related corporate debt now represents roughly 15% of the entire corporate bond universe, surpassing the largest banks as top issuers. Morningstar and JPMorgan analysis highlight that hyperscalers are borrowing heavily to fund AI infrastructure, and JPMorgan projects AI investment could exceed global military spending by 2027. With non-AI corporate debt contracting, AI debt’s share is rising faster, concentrating risk in fixed income similar to the Magnificent Seven’s weight in the S&P 500. The note also points out that elevated yields (10-year Treasury at 4.41% as of May 7, 2026) and a fed funds upper bound of 3.75% mean bonds still offer income, but investors should reassess passive bond and index exposures for implicit AI financing risk.