Fed Paper Projects US Debt Could Reach 250% of GDP Without Immediate Rate Spike

A new Federal Reserve research paper suggests the US debt-to-GDP ratio could balloon to 250% without triggering an immediate surge in interest rates. The study, presented at the Jackson Hole symposium by economists from Stanford, Northwestern, and Harvard, highlights a precarious balancing act between demographic shifts and fiscal policy.

"The aging population's demand for SAFE assets like Treasury bonds may temporarily offset the inflationary pressure of rising debt issuance," explained Ludwig Straub, the Harvard economist who presented the findings. This demographic tailwind could prevent the typical debt spiral where borrowing costs rise with increasing leverage.

Current debt levels stand at 97% of GDP, but recent legislation like the One Big Beautiful Bill Act has accelerated borrowing. The Congressional Budget Office now projects 126.5% debt-to-GDP by 2034 - nearly 10 percentage points higher than January estimates.

The research team's long-term projections through 2100 reveal a sobering reality: while technical room exists for debt expansion, the window for orderly fiscal adjustment is narrowing. "Eventually, debt supply will outstrip safe-asset demand," warned Straub. "When that tipping point comes, the adjustment could be abrupt."