Key Takeaways:
The US government is set to pay its highest borrowing cost in a quarter-century to sell 30-year debt.
The US Treasury is set to sell $25 billion of 30-year bonds at a yield near 5.24 percent Thursday, the highest funding cost since 2001, after a historic selloff in long-dated debt.
The auction follows a selloff that pushed long-dated Treasury yields to levels last seen in January 2025, as war uncertainty and resurgent inflation expectations fueled bets the Federal Reserve will resume hiking, Argus Research said.
CME FedWatch data shows investors pricing a more than 90 percent probability that the fed funds rate, now at 3.50 percent to 3.75 percent, will be higher by year-end, with a 56 percent chance of a hike by September. The 10-year yield stood at 4.24 percent at the end of January, below its 4.9 percent cycle peak in October 2023.
A 25-year high in long-term borrowing costs would raise the government's interest bill, push up mortgage and corporate financing rates, and deepen concerns about fiscal sustainability — potentially forcing a structural shift toward shorter-duration issuance.
The pre-issuance market, where the new bond trades before the actual sale, priced the 30-year at about 5.24 percent. If confirmed, that would mark the most expensive long-dated borrowing for the US government since 2001, according to Bloomberg data. The sale comes after a period of heavy selling in long-dated Treasuries that has left the yield curve steepening as investors demand greater compensation for holding longer maturities.
The higher cost of long-term debt has broad implications across asset classes. Long-duration equities, including technology stocks and real estate investment trusts, face pressure as future profits are discounted at higher rates, while money market funds have become the most attractive fixed-income option amid bond market volatility, according to a Seeking Alpha analysis published Wednesday. The S&P 500, which hit an all-time high in early June, has since declined about 2 percent in an uneven pattern driven by war headlines and rate expectations.
The trajectory of long-term yields hinges on the Federal Reserve's next move. After cutting rates three times in late 2025, the central bank has held the fed funds rate at 3.50 percent to 3.75 percent, with Chair Jerome Powell's term ending in May 2026. The CME FedWatch tool shows a 34 percent probability of a hike at the late-July meeting, rising to 56 percent by September and more than 90 percent by year-end.
The last time long-dated yields traded near current levels was January 2025, when the 10-year yield spiked amid tariff uncertainty before easing through the year. The 10-year yield ended 2025 at 4.14 percent, down 43 basis points on the year, while the two-year yield fell 80 basis points to 3.45 percent — leaving the curve at its most positively sloped since 2021.
If the auction clears at 5.24 percent, it would signal that investors see persistent inflation and heavy supply ahead, keeping long-term borrowing costs elevated. That would weigh on equity valuations, lift mortgage rates for homebuyers, and raise the government's debt-service burden — a dynamic that could force the Treasury to lean more heavily on shorter-dated issuance to contain costs.
This article is for informational purposes only and does not constitute investment advice.
