Treasury yields reach two-decade highs as US debt tops $40 trillion

US bond yields have surged to the highest levels in two decades⁴. Treasury yields hit 20-year highs⁹, and bond yields reached historic highs in Tokyo and Washington at the same time⁸. Last week’s seven-year Treasury note auction cleared at a high yield of 5.085%¹⁰.

US debt has hit $40 trillion³; the national debt recently topped 40 trillion dollars⁶. Annual interest payments on that debt have surged to 1 trillion dollars, pushing the federal deficit close to 2 trillion⁵. One account put debt interest payments at a record 1.38 trillion dollars, or 4.2 percent of GDP, amid a historic bond sell-off⁷.

Why it matters to investors

Budget forecasters have put numbers on the feedback loop. In a modelled scenario, higher rates would lift US debt to 222% of GDP by 2056¹, a level 47 percentage points above the extended baseline, while raising deficits and slowing average annual GDP growth¹. The Congressional Budget Office suggests the total deficit could rise to 14% of GDP by 2056².

Published summaries of that work differ on the growth effect. One cites a CBO estimate that GDP growth will be 0.1 percentage point below baseline⁴; another cites an estimate 0.05 percentage point higher on a different measure, and a debt path 74 percentage points below the CBO’s baseline projection for 2056³. The mechanism underneath is unglamorous: interest payments crowd out other spending⁶.

What to watch

Treasury is responding on the supply side. Treasury Secretary Scott Bessent announced plans to double long-dated bond buybacks to stabilize rising long-term rates¹¹. Whether buybacks can hold the long end down while the deficit runs near 2 trillion dollars is the test⁵.

The buyback plan is a maturity-management tool rather than a fiscal one. It can change where along the curve the pressure lands, but it does not change the quantity of debt being financed, and that quantity has just passed 40 trillion dollars^3,6.

The move is global rather than American. Institutional investors, long forced to chase yield in alternative assets, are being pulled back by what one account calls a deep recomposition of global capital flows⁸, and Japan’s market has come under similar pressure⁷. The near-term markers are clearing yields of the kind seen in the seven-year sale¹⁰, the pace at which interest costs climb toward and past the 1.38 trillion dollar record⁷, and whether the 20-year high in Treasury yields turns out to be a ceiling or a waypoint^4,9.