Has the extra value investors place on Treasuries declined?
Core argument: The AAA–U.S. Treasury spread fell from a 2012–2019 mean of 67 basis points to a 2025 mean of 36 basis points.
The convenience yield of U.S. Treasuries reflects the extra value investors place on Treasuries beyond the present value of the securities’ cash flows - it reflects the value of the liquidity and safety provided by the Treasuries. The convenience yield lowers the interest payments on government debt, which is a source of seigniorage [implicit government revenue]. The reduction in the convenience yield of U.S. Treasury securities, particularly for long-maturity spreads, has been notable. Specifically [comparing the mean 2025 value of each spread measure to its 2012 to 2019 mean], the AAA-UST spread has decreased from 67 to 36 basis points. Additionally, the 10-year swap spread has shifted from 2 to 26 basis points, and the 18-month box spread [the difference between the Treasury rate and an estimate of the implicit risk-free rate used to price call and put options on the S&P 500] has contracted from 34 to 9 basis points. These changes appear consistent with the current environment of elevated fiscal deficits and increased government debt. Such conditions typically reduce the convenience yield and contribute to higher long-term yields.



