Are rising bond yields signaling higher future rates or debt concerns?
Core argument: The rise in ten-year real Treasury yields is driven almost entirely by higher expected long-run overnight rates, not by fiscal credibility concerns or debt sustainability fears.
Ten-year real yields are equal to the average expected overnight yield over the next ten years, plus a risk premium that investors demand for locking up their money for ten years. This term premium reflects the fact that realised overnight rates might deviate from expected overnight rates. If the market saw fiscal credibility or debt sustainability problems, this would show up in an increased term premium. But the term premium has also been stable and is only a hair lower since the end of last year. With term premium and inflation expectations contained, the recent increase in bond yields is therefore almost entirely due to higher expected overnight rates over the long term.


