Yahoo Finance

The risky business of chasing high-yield muni bonds

The downside, though, is that if enough of these risky municipal projects default, those attractive yields will quickly reverse.

About 2.5% of non-investment-grade munis are currently in default, according to Municipal Market Analytics.

https://finance.yahoo.com/news/the-risky-business-of-chasing-highyield-muni-bonds-185633139.html