The U.S. bond selloff intensified through the end of the week, pushing the benchmark 10-year Treasury yield to levels not seen since 2007 and raising the cost of capital across financial markets. The 10-year yield traded as high as roughly 5.23% on Friday before easing, while the Treasury Department’s official end-of-day curve placed it at 5.17%. The 30-year yield finished at 5.54%, extending a move that has carried long-term borrowing costs to their highest levels in more than two decades.
The move extends well beyond the 5.14% intraday peak reached Wednesday, when the 10-year finished around 5.11% and first broke decisively into territory last seen 19 years ago. What initially looked like a sharp reaction to strong economic data has become a broader repricing of how long interest rates may need to stay elevated, with inflation, resilient growth and renewed energy-price risks all working against investors who had expected borrowing costs to decline.
The selloff is especially important because the 10-year Treasury serves as a reference point for financing throughout the economy. Higher yields raise the hurdle rate for equities, influence mortgage and corporate borrowing costs and make government bonds more competitive with riskier assets. Unlike a brief volatility spike confined to one maturity, the latest move has spread across the curve: Treasury’s Friday data showed the two-year yield at 4.94%, the five-year at 5.06%, the 10-year at 5.17% and the 30-year at 5.54%.
Strong Growth Is Making the Fed’s Inflation Problem Harder
The immediate catalyst was a surprisingly strong set of September business surveys. S&P Global’s flash U.S. Composite PMI climbed to 58.4 from 56.0 in August, its strongest reading since July 2021, while manufacturing and service-sector activity both accelerated. S&P estimated that the survey readings were consistent with roughly 4% annualized economic growth during the third quarter and an even faster pace in September.
That strength would normally be favorable for corporate earnings, but the same report showed input costs increasing at their fastest rate in nearly four years as higher energy costs and tighter capacity pushed expenses upward. Employment growth also reached its strongest pace in more than four years. For the bond market, the combination is uncomfortable: growth remains strong enough to tolerate higher borrowing costs while inflation pressures are giving the Federal Reserve less reason to reverse course.
The Fed had already moved in that direction before the latest data. On September 16, policymakers raised the federal-funds target range by a quarter percentage point to 3.75% to 4.00%, citing resilient domestic spending and inflation that remains elevated. The Fed’s September projections put median 2026 PCE inflation at 3.7%, core PCE inflation at 3.4% and the median year-end policy-rate projection at 4.1%, up from 3.8% in June. Those projections are individual policymakers’ assessments rather than promises of future action, but they show that the expected rate path has shifted higher.
Markets have moved in the same direction. By Friday, futures pricing implied roughly a 71% probability of another quarter-point rate increase in October, according to CME data cited by Reuters. That probability can change rapidly with incoming data, but the repricing helps explain why the two-year Treasury yield has climbed toward 5% even as investors demand still higher yields to hold longer maturities.
Borrowing Costs Are Already Moving Higher
The consequences are becoming more visible outside the Treasury market. The average 30-year fixed mortgage rate rose to 7.03% in the week ended September 24, up from 6.95% a week earlier, 6.71% at the beginning of September and 6.30% a year ago, according to Freddie Mac. That increase adds another constraint to a housing market already dealing with affordability pressures and illustrates how quickly higher benchmark yields can reach households.
Equities have been more resilient than the bond market might suggest. Wall Street opened roughly flat Friday even with Treasury yields near multi-decade highs, as continued enthusiasm around artificial intelligence helped offset concerns about interest rates and energy prices. That resilience does not eliminate the valuation pressure created by a 10-year Treasury yield above 5%; it means strong earnings expectations and sector-specific growth have so far prevented the bond move from developing into a broad equity selloff.
Longer-term yields also suggest investors are responding to more than the next Federal Reserve meeting. A 30-year Treasury yield above 5.5% reflects the return investors require to lock up capital for decades, incorporating expectations for inflation, economic growth, future government borrowing and uncertainty surrounding the long-run rate environment. With the 30-year yield well above the two-year yield, the pressure at the long end cannot be explained solely by expectations for the Fed’s next few policy decisions.
Treasury Buybacks Have Not Stopped the Repricing
The Treasury Department has increased purchases of older long-dated securities as the bond market has come under pressure, but those operations should not be confused with Federal Reserve quantitative easing or a formal attempt to peg interest rates. Treasury describes the program as liquidity support, intended to improve trading conditions in less-liquid securities. In August, it said maximum buybacks in the 10-to-20-year and 20-to-30-year sectors would at least double from $2 billion to $4 billion per operation through early November.
The department subsequently scheduled a purchase of as much as $6 billion in 20- and 30-year securities during this week’s selloff. The fact that long-term yields continued rising shows the limits of those transactions when investors are simultaneously reassessing inflation, economic growth and the expected path of monetary policy. Liquidity operations can improve market functioning, but they do not remove the economic forces determining what investors require to own long-duration debt.
Oil remains another important variable. Higher crude prices have added to concerns that energy costs could slow the decline in inflation, while developments in the Middle East have repeatedly moved both oil and bond markets during September. The relationship cuts both ways: easing energy prices would reduce some of the immediate inflation pressure, while another sustained increase would make it harder for investors to anticipate an early end to Federal Reserve tightening.
The next major test arrives with the September employment report on October 2, followed by September consumer-price data on October 14. A labor market that remains unusually strong alongside persistent inflation would reinforce the forces that pushed the 10-year above 5%, while softer growth or inflation data could give the bond market its first durable reason to reverse part of the selloff. Until then, the question facing markets is no longer simply whether Treasury yields can reach 5%. It is how long borrowing costs can remain there without materially changing demand, valuations and financial conditions across the economy.