you should only by c's and d's
no risk of conversion to commons...which are basically useless....at the moment...and a's and b's will be converted eventually that leaves c's and d's that pay over 40 c dividend that was almost 40 % dividend annually and will be paid to you or bought out at 25 $ a share or so...so thats they only way u should be playing yellow media to make a quick buck...also invest the money u get from the dividend to but other shares ....thats gives u a huge compounding effect ...with my calculations considering the dividends..you could double your investment in less then 6 months on c's and d's...even more if others start to pick them up