Earl.......perhaps you will share your findings.........like the top 5 
or 10 muni funds that look attractive?
 
NIO-- Priced @ 13.52 has TEY of 7.15; CDR 5.15 @ a 8.46% discount to 
NAV.
 
I have found higher yields, but holdings rated BBB or below  range 
from  19 to 74% and one might suspect some defaults.
 
THX, Gerryb