@GoDividend In fact, there is even an ETF on the subject that can be traded in Germany, the Invesco Preferred Shares UCITS ETF (WKN: A2JEE2). There are a few more in the USA, for example I have picked out the iShares Preferred and Income Securities ETF.
@GoDividend it was not the time to invest in PS with the interest rate environment. Now a bottom could have been reached and prices could return towards their nominal value. But you need to understand how it works!
@freakyfinance According to your post, however, this can or may take a very long time. I'll keep an eye on scalable. But I don't know yet whether it's right for me