Brokerage Function is often allowed to refer to an investment dealer as a broker. When Brokerage Function deal with a securities firm as a case-by-case, we are asking that firm to broker a transaction on our behalf. The rewards for taking this risk, however, are often huge: the subventing firm receives a profit from the difference between the buying and selling prices, so naturally, this firm will aim to sell as many units of the issue as possible at the highest price possible. The broker can represent buyers and sellers, who in fact are the principals, or owners of the securities.