The money you initially put into an investment, e.g. when you invest $100 in a bank term deposit this is your "capital" amount on which you get paid interest. See news stories related to Capital. See guides related to Capital.  See reader questions and answers related to Capital.  

The fee you pay to a broker for buying or selling shares. See news stories related to Brokerage. See guides related to Brokerage. 

Fixed interest securities which can be bought and sold, and which may be traded on a stock exchange. See guides related to Bonds.  See reader questions and answers related to Bonds.