All points are true but that does not answer why bonds which are senior to the preferrerds are selling at such a big discount. I can only assume there are more high yield bond funds that are getting redemptions than preferred holders who want out.
I also own some bonds. I am assuming high yield bond funds are dumping energy high yield bonds because of redemptions and they do not want them on their books for year end. The preferrerds are not owned by these funds.