Islamqa is one of the most trusted Muslim websites for iftaa, and in the link below they define what are stocks and shares and why stocks are haram and why shares are halal. Does IFG invest in stocks or in shares (or follow funds that invest in them)? What are your opinions? Jazzakumullahu Khayran!
(https://islamqa.info/en/answers/69941/the-difference-between-shares-and-stocks)