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Long-term US borrowing costs climbed to levels not seen since before the global financial crisis after the Treasury auctioned $25bn (€21.3bn) in 30-year bonds at a high yield of 5.058% on Wednesday, according to the department’s own data.
The sale came only hours after the US Senate voted to confirm former Federal Reserve governor Kevin Warsh as the next chairman, succeeding Jerome Powell.
The auction result immediately complicated the backdrop for Warsh’s arrival at the central bank, underlining the pressure facing policymakers as inflation is rising.
At the time of writing on Thursday, US 30-year bonds are trading at 5.02% while 10-year notes are selling with a yield of 4.44%.
US inflation figures released earlier this week showed consumer prices rose 3.8% from April 2025 as the 10-week Iran war pushed energy costs higher and distanced inflation from the Federal Reserve’s 2% target.
Producer price data also pointed to persistent underlying cost pressures across the economy, reinforcing expectations that the central bank may struggle to ease monetary policy quickly.
Rising Treasury yields have broad implications for the economy because they influence borrowing costs on mortgages, corporate debt and other forms of credit.
Higher long-term yields can also increase financing costs for the US government at a time when public debt is nearing $40 trillion (€34.1tn).
Investors are increasingly concerned that a combination of resilient economic growth, elevated energy prices and sustained government borrowing could keep inflationary pressures alive despite two years of restrictive monetary policy.
The yield on the benchmark 30-year Treasury bond being auctioned above 5% is a symbolic threshold last reached in 2007 before the onset of the global financial crisis.
While market conditions today differ substantially from that period, the move nonetheless underscores the sharp repricing that has taken place in global bond markets over the past two years.
Kevin Warsh inherits a difficult policy environment
Kevin Warsh takes over the Federal Reserve at a delicate moment for the US economy.
The former Morgan Stanley banker and Fed governor has previously argued in favour of maintaining the central bank’s credibility on inflation, while also signalling support for reforms to the institution’s communication strategy and balance sheet policies.
Warsh’s confirmation comes as financial markets remain divided over how aggressively the Federal Reserve should respond to persistent inflation pressures.
Some investors believe rates may need to stay higher for an extended period, while others warn that maintaining tight monetary conditions for too long could weigh heavily on economic growth and employment.
The main driver of the rise in inflation is the current disruption to global energy markets caused by the Iran war which also leaves the central bank at the mercy of geopolitics and not able to effectively control the situation.
Analysts stated that Wednesday’s Treasury auction illustrated the immediate challenge confronting the incoming Fed chair.
Elevated bond yields can help tighten financial conditions without additional rate increases from the central bank, but they can also amplify risks for heavily indebted households, businesses and the federal government itself.
For Warsh, the market reaction served as an early reminder that restoring confidence on inflation may prove more complicated than simply holding interest rates at restrictive levels.
