Divided warehouse income of securities firms. Brokers collect commissions from fund companies after providing services such as fund underwriting or industry and company research. Sub-warehouse commission refers to the fees paid to securities companies when a fund company entrusts a number of securities companies to buy and sell funds at the same time. After the transaction is completed, the fund position commission is the operating income or handling fee income of the securities company acting as an agent for the fund company to buy and sell funds.