Long-dated Treasury yields are around their highest levels in about 20 years, and the drivers do not look short lived. Washington's heavy issuance reflects persistent budget shortfalls, while inflation has only inched down, and AI-driven capital spending is propping up overall growth even as housing and autos lag.
That mix has lifted the interest bill to about US40 trillion. Apollo Global Management's chief economist, Torsten Slok, put it bluntly: for every five dollars in tax revenue, one goes to interest. "That's a really, really high number and that's just going to continue to increase." At a recent appearance, DoubleLine Capital chief executive Jeffrey Gundlach said, "it's quite obvious that the government is getting uncomfortable with the level of rates." In a September 28 interview with Time magazine, U.S. President Donald Trump said the debt could be retired via growth or inflation, among other avenues.
Treasury has tilted issuance toward shorter-term bills and begun small buybacks of older bonds to improve liquidity. Those are the lighter touches. Pushing harder likely requires the Federal Reserve's balance sheet.
A likely next step would mirror 1961's Operation Twist, swapping issuance toward selling short maturities and purchasing longer-dated bonds to compress the curve. Slok noted that, absent the Fed's balance sheet, the Treasury "has limited resources to lower interest rates," and the central bank may refrain from acting unless there is an obvious financial crisis.
Kevin Warsh, Fed Chairman, has faulted the central bank's sizable stockpile of Treasuries and other assets, saying large-scale purchases risk muddling the boundary between monetary policy and managing the debt. He has proposed a new Treasury-Fed accord in which the Fed chair and the Treasury secretary would make public shared goals for the Fed's balance sheet and for Treasury issuance.
If twist-style buying is not enough, the heavier lift is yield curve control. That approach entails the central bank committing to purchase unlimited amounts of government securities so that long-term yields do not breach a predetermined cap. The last time the Fed restrained long Treasury yields at 2.5 per cent was during 1942 through the 1951 Treasury-Fed Accord, undertaken to help pay for World War Two and the subsequent recovery, and the Bank of Japan operated a similar framework from 2016 to 2024.
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It works only while investors trust they will be repaid in money that holds its value. If that confidence breaks, the very purchases meant to pin yields can end up stoking inflation.
Veronique de Rugy, a senior research fellow with the Mercatus Center at George Mason University, remarked, "Congress needs to do a fiscal adjustment. Austerity, in other words. The Fed can't do it alone."
Capital Economics' chief economic adviser, John Higgins, argues that since World War Two the U.S. has managed to bring down the debt-to-GDP ratio in a meaningful way on only two occasions, and the implications for bondholders diverged sharply across those episodes. During the 1990s, the debt ratio declined to 32 per cent of GDP from 48 per cent, and interest rates fell alongside it.
What changed between those episodes was the policy mix. In the postwar era, keeping borrowing costs capped and allowing relatively high inflation pushed nominal growth ahead of Treasury yields, shrinking the debt with little fiscal restraint. In the 1990s, with rates running a bit above growth, spending discipline and rising revenue did the heavy lifting.
The menu today looks similar: one route is austerity paired with declining yields; the other is financial repression alongside inflation, a mix under which yields may increase even while the debt ratio gets better. With mandatory spending now a larger share of the budget and little appetite in Congress for tax hikes or spending cuts, Higgins sees the risks "tilted toward" the inflationary path that hurts bondholders.
Yields near two-decade highs, an interest bill around US40 trillion, and fewer easy levers suggest borrowing costs will not drop much without a bigger policy swing. Treasury's pivot to bills and small buybacks can smooth liquidity, but stronger steps likely involve the Fed and come with higher inflation risk, a clear negative for long-duration bonds. The bottom line: whether policymakers lean into fiscal restraint that pulls yields lower or yield caps that risk inflation will shape returns for Treasuries, equities, and rate-sensitive corners of your portfolio.
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