Do rising bond yields signal worries about debt sustainability?
Core argument: The term premium on ten-year Treasuries has been stable and sits only a hair lower than at the end of last year, whereas fiscal credibility or debt sustainability concerns would show up as an increased term premium.
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.


