FYI: ( The linkster's Hertz 1/15/21 7.375% that I bought a year ago are holding their own.)
In March, my colleague Emory Zink wrote about elevated risks of a sell-off in the corporate bond market ("Tiptoeing Towards the Exits in Corporates"). Citing remarkably narrow option-adjusted spreads among investment-grade corporate bonds (85 basis points in January--a decade low), she discussed some intermediate-term bond funds that had begun to pare back their corporate exposures.
Regards,
Ted
https://www.morningstar.com/articles/882719/whats-the-hubbub-with-bbb-bonds.html