HKS Affiliated Authors


November 2022, Paper: "Theory suggests that corporate and sovereign bonds are fundamentally different, also because sovereign debt has no bankruptcy mechanism and is hard to enforce. We show empirically that the two assets are more similar than you think, at least when it comes to high-yield bonds over the past 20 years. Based on rich new data we compare high-yield US corporate bonds (“junk” bonds) to high-yield emerging market sovereign bonds 2002-2021. We find that investor experiences in these two asset classes were surprisingly aligned, with (i) similar average excess returns, (ii) similar average risk-return patterns (Sharpe ratios), (iii) a similar default frequency, and (iv) comparable haircuts. A notable difference is that sovereigns feature “serial defaults”, which are not observed for corporations and that the average default duration is slightly higher for sovereigns. Furthermore, the time profile of bond returns and default events differs. One explanation is that the two markets co-move differently with domestic and global factors. US “junk” bond yields are more closely linked to US market conditions such as US stock market returns, US stock price volatility (VIX), US industrial production growth, or US monetary policy shocks."