What went wrong? Why did seemingly rational bond investors continue to purchase Puerto Rican debt with only a modest risk premium, even though the macroeconomic fundamentals were dismal? Why did financial markets fail to exercise market discipline and restrict capital flows to Puerto Rico? Given...

Debt vulnerabilities in low-income countries have increased substantially in recent years. Since 2013, median government debt has risen by about 20 percentage points of gross domestic product and increasingly comes from non-concessional and private sources. As a result, in most low-income...