Rising US Debt Costs Prompt Drastic Policy Considerations

The US government is facing rising borrowing costs as long-term Treasury yields approach two-decade highs, driven by persistent inflation and a growing national debt. With deficits showing no signs of shrinking and the economy bolstered by an AI investment boom, the interest bill on over $40 trillion in debt has ballooned to roughly $1 trillion annually. The government is exploring various strategies to manage these costs, from increasing short-term borrowing to more drastic measures like yield curve control.

One potential solution could be a revival of Operation Twist, a 1961 strategy where the government sold short-term debt and bought long-term bonds to flatten the yield curve. However, this approach would require cooperation from the Federal Reserve, which may hesitate without a clear financial crisis. Fed Chairman Kevin Warsh has argued for clearer communication between the Fed and Treasury to avoid blurring the lines between monetary policy and debt management.

If Operation Twist proves insufficient, the next step could be explicit yield curve control, where the Fed buys unlimited government debt to cap long-term yields. While this method eases political pressures from deficits, it risks fueling inflation if investors lose confidence in the value of their repayments. Some experts argue that the only sustainable solution is fiscal discipline, with Congress needing to cut spending to address the debt problem.

The US has successfully reduced its debt-to-GDP ratio only twice since World War II, with bondholders experiencing vastly different outcomes each time. Post-war, capped borrowing costs and inflation helped shrink the debt ratio without strict fiscal measures. In the 1990s, spending restraint and rising revenue achieved similar results. Today, the path forward seems tilted toward inflationary measures that could harm bondholders, as Congress remains reluctant to implement tax hikes or spending cuts.