Most of the people on this board have no idea what you are talking about. A better question is what are you trying to achieve by buying bonds/preferred or common stock? Each have advantages and disadvantages based on your objectives and risk tolerance. Money can be made and lost in any of the instruments. Performing a DCF, Discounted Cash Flow or a Time value of money analysis may help you make a decision. I would suggest you let your objectives direct the decision instead of the instrument.
Colgate currently pays a 2.2% divy. Impressive but not the rate or amount of risk I want. FTR has it's share of problems but they keep sending me dimes every quarter. Fortunately my basis is below current market value and reinvesting, compounding dividends has treated me well.
I was just in Dallas, Texas and many buildings downtown have signs which state it is illegal to have a gun open or concealed on the premises and cite an ordinance. Some locations in Alabama do the same. So much for open carry or a permit to conceal.