claffra/iStock via Getty Images Costamare Series E Preferreds (NYSE:CMRE.PR.E) are the most junior of the preferreds in the whole capital stack, above only common stock. Value drivers here are credit quality of Costamare (CMRE) and duration considerations, as they are basically ultra-long duration unsecured credit. We've discussed them in the past, and the core idea that the common stocks are more worth following has not changed, especially as trade disruption events could become recurring trading opportuni ...