Weak 30-Year Treasury Sale Tests Demand for Long-Dated Debt — Evening Brief – 08.13.26

Demand for long-term U.S. government debt was weak in the third and final leg of the Treasury’s quarterly refunding auctions as the Treasury’s $25 billion sale of 30-year bonds cleared at the highest yield in 25 years, extending concerns about rising federal borrowing costs and investor appetite for duration.

The bonds priced at a high yield of 5.216%, slightly above the 5.212% when-issued yield immediately before the auction. The 0.4-basis-point “tail” indicated that investors required a modest concession to absorb the supply.

The auction’s bid-to-cover ratio, which measures bids received relative to debt offered, declined to 2.392 from 2.444 in July. It also fell below the six-auction average of 2.429.

Indirect bidders, a category that includes foreign central banks and investment managers, purchased 66.9% of the offering. That was down sharply from July’s unusually high 77.7% and slightly below the recent 67% average.

Direct bidders took 21.6%, compared with a six-auction average of 22.5%. Primary dealers absorbed the remaining 11.5%, up from 10% in July and above the 10.6% average.

The results indicated weak but not disorderly demand. Investors submitted enough bids to complete the financing, but participation was less favorable than at the previous auction.

The sale completed the Treasury’s $125 billion quarterly refunding, which also included $58 billion of three-year notes and $42 billion of 10-year notes.