Halacha:

Ribbis 

Collections: R' Ike Sultan Ribbit Chabura

Description

After research, the preferred stocks have a price that fluctuates less than the common stock but also changes based on fed interest rates. The dividends are more likely but can also be cancelled just like in a regular stock. They are often convertible to a higher amount of regular stock ie it goes up in price but it can lose price also. It is equity and it is karov lzeh vlzeh so it seems that it isn’t ribbit.