Brokerage firms have minimum commissions for trading stock, from $7 to $55, depending of the number of shares sold and the value of the stock.

Brokerage firms have minimum commissions for trading stock, from $7 to $55, depending of the number of shares sold and the value of the stock. Full-service broker would typically charge about $150 on a transaction, discount brokers $55 to $85. Full service and discount brokers charge more than online brokerage transactions, but you make your own decisions in trading online. Who Regulates the Securities Markets?