Business of constituting a Broker One may open a brokerage office, upon having a broker’s license, for the function of employing in brokerage. Commission experienced by a broker for his services. For example, the brokerage on the sale of a $100,000 house was $6,000. Ecurities: Person acting as an agent or Intercessor between buyer and seller, Generally charging a fee, or commission, for performing that service. Banks acting as brokers on behalf of their customers must register with the Securities and Exchange Commission and with the literal exchange where trading takes place.