High yield bonds are forecast to default at a 40% higher rate. I'm guessing those that invested in these bonds have been sweating for the last few months, and will continue to sweat for the distant future. Even if the issuer of the bond manages to get out of their financial problem, the possibility of this to happen will not be soon. To make things worse, if bankruptcy raises its ugly head, the final return may be pennies on the dollar of the original investment; and such things as pensions may lead to court decisions that leave absolutely nothing for the investor. Regardless of the outcome, long periods of time pass without an answer, and without money to invest in something more profitable.
Investing is always a gamble, and with the Covid madness, investing in municipalities with a bad credit rating is betting on an inside straight.