Types of Brokers. The trading activities done by the investors are executed by a security firm acting either a broker or a dealer. A firm acting in a brokerage capacity serves as an agent for investors by finding anther investor to take the other side of the transaction. For doing this job, the broker is compensated by a commission. A broker in the securities markets is an … [Read more...] about Types of Brokers and Dealers – A Broker in The Securities Markets