US Public Debt Surpasses $40 Trillion as Treasury Doubles Long-Dated Buybacks

Treasury Secretary Scott Bessent announced the buyback expansion on the same day debt records updated, aiming to compress term premiums on longer maturities. Fiscal year 2026 interest outlays already reached $1.37 trillion through July, up 20 percent year-over-year. The $1 trillion addition since June occurred outside wartime or recession conditions, driven by structural primary deficits exceeding 6 percent of GDP.

CBO baseline projections from March 2025 and the Treasury Quarterly Refunding documents show debt-to-GDP rising above 122 percent by 2034 under current law, with net interest becoming the largest federal expenditure category by 2027. Both parties have sustained revenue and entitlement trajectories that produce these outcomes; neither has enacted multi-year primary balance adjustments. The buyback shift mirrors prior operations that reduced average maturity without addressing stock growth.

Market clearing yields on 30-year auctions reached 25-year highs before the announcement reversed them temporarily. This dynamic increases future coupon payments, widening the deficit and requiring larger issuance—the precise feedback the Treasury statement seeks to interrupt. Foreign official holders reduced net purchases in the second quarter, shifting more absorption to domestic leveraged accounts.

Absent legislative change before the 2027 debt ceiling deadline, the Treasury will likely extend the buyback program into 2026 while testing further adjustments to auction sizes. Primary dealers report capacity constraints at current yield levels if foreign demand remains flat.