Are government bond yields hiding the true cost of borrowing?
Core argument: Analyst-estimated shadow yields represent a lower bound on potential rate moves: the exercise assumes no outright central bank bond sales, meaning a full market exit would drive long-end yields materially higher still.
The scatter plot shows my estimates for what 30-year shadow yields are for Germany (DE), Spain (ES), Italy (IT), Greece (GR) and Japan (JP). The solid red dots are actual yields in markets as of [July 21st], while the hollow dots are where I think yields would be if central banks pulled back from yield caps. In the case of Japan, this would be an end to gross purchases of JGBs. For the ECB, it means cancelling TPI and going back to the OMT as the only bailout facility. It would obviously also preclude the kind of comments President Lagarde is fond of making on French yields. I don’t anticipate actual selling of government bonds from anyone, so my shadow yields are a lower bound for how high yields might go if central banks really exited bond markets.

