How much does debt tolerance vary across countries at equal debt levels?
Core argument: Illustrative “debt tolerance” levels — the debt ratio above which a country is predicted to lose a rating of 9 with p=50%, given zero forecast primary balances and the 2020 time effect — reach 272% for Singapore and 248% for Germany.
Germany has an expected rating of 11, while, at the same level of debt and primary balances, Ireland has a predicted rating of 9, and the Baltic countries have a predicted rating of 2. Even given debt, and the forecast evolution of primary balances over the next five years, investors may question what will happen over a longer horizon. Uncertainty about interest rates and primary balances can vary, and the composition of the investors’ pool can vary. Yet, the differences are striking. Figure 7 shows a “debt tolerance” level - the level of debt above which a country is predicted to lose its rating of 9 with p= 50% (given zero forecast primary balances and the year 2020 time effect). At one end, the highest illustrative debt ratio tolerance levels are for Singapore (272%) and Germany (248%). In the middle are the US (161%), France (135%), and Italy 89%. At the low end are the Baltics, with ratios <0.

