over the course of 99% of market activity of 99% of companies - preferred are used and thought of as PAR purchase price and PAR redemption - sale - call and dividends along the way.... a bit riskier than bonds but for healthy companies a way to make 20% more INCOM
preferred shares are income shares (but equity)
based on all market theory (say U of C and the like) the risk reward on preferred shares is closer to that of a bond
common is normal equity risk reward --- with lots more risk and volatility risk and complete reward
think if Amazon and Netfilx and Google and MSFT had issued preferred at PAR 25
why would not common - who took the full risk for no dividends - not get 5 or 10 TIMES the return