This post is off the topic of certificates of deposit. However, it remains on the topics of fixed income investments, safety, and yield. While likely of most interest to high income investors living in certain states, others might also wish to be aware of what's here:
There are today available some rather high yielding, well rated, munis. In the muni world, state GOs are perhaps among the most highly rated credits. We are not discussing hospital bonds here, or county debt either for that matter (yes, I well remember the insane Orange County, CA, default and bankruptcy filing in 1994). While nothing is for certain in today's world, the credit quality here is respectable and might, for some, justify tax equivalent yields approaching 10%.
This off topic post is NOT a recommendation. I am merely here to raise awareness. Any risk you might decide to assume is entirely on you:
https://finance.yahoo.com/news/york-jersey-muni-bond-buyers-182929259.html
https://fixedincome.fidelity.com/ftgw/fi/FILanding#tbcurrent-yields|highest-yield
Note for anyone unfamiliar:
Safety is paramount. State GO (General Obligation) bonds have a long history of safety. The most recent default came during the Great Depression in Arkansas. The ability of any state to file for bankruptcy is a topic of debate. More can be found here:
https://en.wikipedia.org/wiki/State_defaults_in_the_United_States