US Treasury Yields Hit 25-Year Highs on Fiscal Pressures

US long-term Treasury yields have climbed to 25-year highs, with the 30-year bond auctioning at 5.216 percent — the steepest since 2001 — as investors demand more compensation for a $40 trillion debt.

"Inflation is not the main driver here," said David Bianco, chief investment officer for the Americas at DWS. "The bigger issues are structural: US deficits above 6 percent of GDP, a rising total debt-to-GDP ratio, and the need to fund more borrowing domestically as foreign demand becomes less reliable."

The Aug. 13 auction of $25 billion in 30-year Treasuries drew a bid-to-cover ratio of 2.39, below the 12-month average, with primary dealers absorbing 11.5 percent of issuance. The 10-year Treasury note has traded above 4.6 percent for nearly a month, roughly 40 basis points above Congressional Budget Office projections. The 30-year yield touched 5.33 percent on Aug. 18, its highest since 2007.

The fiscal arithmetic is deteriorating. US debt surpassed $40 trillion for the first time, with the debt-to-GDP ratio at roughly 123 percent — near all-time highs. The US has run fiscal deficits for 25 consecutive years, and higher interest payments on outstanding debt are compounding the deficit. Fitch Ratings projects developed-market general government debt will rise by $4.2 trillion to $75.8 trillion, or 104 percent of GDP, by end-2026.

Treasury Buybacks Fall Short

The Treasury's response has been limited. Last week, the department said it would at least double its buyback ceiling on longer-dated bonds from $2 billion to $4 billion following the historic rise in yields. Rates initially fell on the news but reverted to pre-announcement levels the next day, as investors viewed the move as a debt reshuffling — refinancing long-term debt with short-term debt rather than retiring it. The $4 billion buyback on a $40 trillion debt pile amounts to one basis point relative to total debt.

Global Yield Spike

The move extends beyond the US. Average G7 long-dated yields are at their highest since 2008, with Japan's long-dated yields posting the largest rise this year. UK, French, and German long-dated bonds have all touched levels not seen in more than a decade. The initial trigger was the US-Iran war outbreak at end-February and the inflationary impact of higher oil prices, but the summer spike reflects a surge in competing supply from corporate issuers — including AI-related investment financing — and higher term premiums.

The last time the 30-year yield traded at these levels was in 2001, when the US was running budget surpluses and the debt-to-GDP ratio was below 60 percent. Today's situation is structurally different: deficits above 6 percent of GDP, a debt-to-GDP ratio above 120 percent, and a shrinking foreign buyer base.

Higher term premiums driven by fiscal and monetary policy uncertainty are more damaging to public debt dynamics than higher yields driven by stronger nominal growth expectations, Fitch said. Developed-market sovereigns with high debt-to-GDP ratios and short average debt-maturity profiles are most exposed to a sustained increase in yields.

For equity markets, sustained high Treasury yields and real rates could pressure valuations, increase corporate borrowing costs, and potentially trigger broader selling across risk assets. The transmission chain runs from fiscal policy through bond yields to equity multiples and credit spreads. Without action to put debt on a sustainable downward path, the United States faces a potential debt spiral — where interest costs grow faster than the economy — which in the worst case could lead to a fiscal crisis, according to the Committee for a Responsible Federal Budget.

This article is for informational purposes only and does not constitute investment advice.