The US Treasury sold $18 billion of 20-year bonds at a high yield of 5.204%, in an auction that showed a somewhat soft demand profile despite an earlier announcement that the Treasury would at least double the size of its long-end liquidity-support buybacks. The 20-year bond, reintroduced in May 2020 to bridge the gap between the 10-year note and the 30-year bond, is sold monthly and has frequently traded cheap on the yield curve since its return, so each auction serves as a recurring read on investor appetite for the longest-dated coupon supply.

Auction results

• High yield: 5.204%
• When-issued (WI) level at the time of the auction: 5.199%
• Tail: 0.5 bps
• Bid-to-cover ratio: 2.53x
• Direct (domestic buyers): 24.59%
• Indirect (international buyers): 62.93%
• Dealers: 12.49%

The auction tailed by 0.5 bp, with the high yield of 5.204% set against a when-issued yield of 5.199% immediately before the sale. A tail generally indicates that investors demanded a slightly higher yield than the market had anticipated, making this a modestly weak result.

The bid-to-cover ratio came in at 2.53x, below the roughly 2.66x average across the previous six auctions. International buyers took 62.93% of the issue, almost 3 percentage points below the recent average, while dealers absorbed a larger-than-usual share. Indirect bidders — typically overseas central banks and institutions that bid through primary dealers — are the standard proxy for foreign demand at Treasury auctions, so the below-average indirect take was the clearest soft spot in the results.

Earlier in the day, the Treasury announced it would at least double the size of its liquidity-support buybacks of longer-dated securities, raising them from $2 billion to $4 billion per operation. The announcement prompted a sharp rally in long-dated Treasuries, with the 30-year yield briefly falling almost 10 bp. The buyback program, launched in 2024 as the Treasury's first regular repurchase effort since 2002, is designed to support trading liquidity in older, off-the-run securities that newer issues have replaced as market benchmarks, and the enlarged operations target the longer-dated segment of the market.

On that basis, stronger demand for today's 20-year auction might have been expected. Instead, the sale still tailed by 0.5 bp, suggesting that while the announcement provided a short-term boost to the secondary market, it did not completely eliminate investors' concerns. The state of structural demand for long-dated supply will next be visible in the Treasury's quarterly refunding process, where the department updates its borrowing estimates, auction calendar, and buyback plans, and in the results of subsequent monthly 20-year sales.