US Debt Crisis Forces Choice Between Austerity and Inflation

Key points

• Annual interest payments on US national debt have reached approximately $1 trillion, with one dollar of every five in tax revenue spent on servicing this debt.
• Long-term Treasury yields are at their highest levels in two decades, driven by persistent deficits, slow inflation cooling, and a strong AI-driven economy that prevents rate cuts.
• The Treasury is currently using short-term bill issuance and small buybacks of older debt to manage liquidity, but these measures are insufficient to significantly lower long-term rates.
• If current strategies fail, the next step could involve a revival of 'Operation Twist,' where the Federal Reserve sells short-term debt and buys long-term bonds to flatten the yield curve.
• A more extreme measure would be explicit yield curve control, where the Fed caps long-term yields, a policy last used in the US during World War II and recently in Japan.
• Historical data shows the US has only reduced its debt-to-GDP ratio twice since WWII: once through inflation and capped rates, and once through fiscal austerity and rising revenue.

Background

Recent months have seen a sharp rise in global bond yields, with the 30-year Treasury yield hitting 5.38% in September 2026. This surge was exacerbated by Middle East tensions, oil price spikes, and expectations of Federal Reserve tightening. In early September, the Treasury expanded its debt-buyback program to $6 billion, but this fell short of analyst expectations, leading to further yield increases. Treasury Secretary Scott Bessent’s efforts to lower yields through buybacks have faced market resistance, suggesting the administration may be running out of conventional tools to manage borrowing costs.

Why it matters

The rising cost of servicing US debt threatens to crowd out other government spending and exacerbate inflation. If the government relies on inflationary measures to manage debt, it could erode investor confidence and lead to higher prices for consumers. Conversely, fiscal austerity could slow economic growth. The outcome will significantly impact global financial markets, interest rates, and the stability of the US dollar.

What to watch

The Treasury will likely continue to rely on short-term borrowing and small buybacks in the near term. If yields continue to rise, the Federal Reserve may be pressured to engage in large-scale bond purchases or implement yield curve control. Congress may face increasing pressure to enact fiscal adjustments, though political resistance to spending cuts and tax hikes remains high. Investors should monitor upcoming Treasury auctions and Federal Reserve communications for signs of policy shifts.