Federal Reserve’s hiking cycle raises concerns for AI financing as sector carries $320 billion in debt

The Federal Reserve’s first rate hike in three years landed in September 2026 like a cold shower on an industry that had been borrowing like there was no tomorrow. AI infrastructure firms, which have collectively issued roughly $320 billion in debt by mid-2026, now face a fundamentally different cost-of-capital environment at precisely the worst moment. After years of funding massive data center buildouts and GPU purchases from retained earnings, AI hyperscalers began tapping the bond markets aggressively in late 2025. The reason was straightforward: their capital expenditures had outpaced operating cash flows. The debt pile and what’s coming The $320 billion already issued is just the opening act. Total AI-related debt issuance for 2026 is projected to land somewhere between $490 billion and $570 billion. To put that in perspective, the entire US high-yield bond market typically sees around $300 billion in annual issuance in a busy year. Capital expenditure estimates for leading AI firms are expected to exceed $1 trillion in 2027. Echoes of the 1990s Richard Abbey and John Authers have flagged the potential for broader credit market disruption, and their concerns track with warnin...