Emerging market bond spreads and sovereign credit ratings: reconciling market views with economic fundamentals

摘要

This paper uses a panel data estimation of a simple univariate model of sovereign spreads on ratings to analyze statistically significant differences between actual spreads and ratings-based spreads. When such deviations are significant, we find that 'excessively high' spreads are on average followed by episodes of spread tightening 1 month later rather than credit downgrades. In contrast, observations with 'excessively low' spreads are on average followed by rating upgrades 3 months later rather than episodes of spread widening. The paper also illustrates how significant disagreements between market and rating agencies' views can be used as a signal that further technical and sovereign analysis is warranted. For instance, we find that spreads were 'excessively low' for most emerging markets before the Asian crisis. More recently, spreads were 'excessively high' for a number of emerging markets.