After strong demand for 3-year and 10-year Treasury debt earlier this week, Thursday’s 30-year bond auction delivered a much weaker finish.
Why it matters: Weak demand for long-term government debt can push Treasury yields higher, potentially putting upward pressure on mortgage rates and other borrowing costs.
- The 30-year auction stopped at a high yield of 5.216%, above the 5.212% when-issued yield immediately before the auction. That produced a 0.4-basis-point tail, signaling investors required a slightly higher yield than markets had anticipated to absorb the debt.
- Demand was also relatively soft. The bid-to-cover ratio came in at 2.39, below the 2.42 average across this year’s auctions.
Breaking it down: Indirect bidders, a category that includes foreign central banks and other international investors, took 66.8% of the auction. That was well below July’s unusually strong 77.7% share but almost exactly in line with this year’s 66.9% average.
- Direct bidders stepped up, taking 21.6% of the auction, a significant increase from just 12.2% in July. However, that was still slightly below the 22.3% average for the year.
Impact on Mortgage Rates: Unlike the strong 3-year and 10-year auctions earlier this week, Thursday’s results were slightly negative for bonds. While one disappointing auction is unlikely to significantly move mortgage rates on its own, consistently weak demand for longer-term Treasury debt could push yields and mortgage rates higher.
The bottom line: Treasury’s auction week ended on a sour note. Demand wasn’t disastrous, but investors clearly weren’t as enthusiastic about buying 30-year debt as they were shorter maturities earlier in the week.