The official name of the red vest is "trader" or "market representative". Is the market representative of the member units of the exchange (futures companies, self-operated members). He is responsible for inputting the trading instructions of the company (customer) into the trading terminal of the seat (commonly known as "typing in"), and making returns and inquiries about the transaction. In addition, it is also responsible for all the affairs of futures companies (or self-operated members) in the exchange, such as deposit and withdrawal transfer, signing documents, attending and voting at temporary meetings of the exchange, etc.

In the exchange, the red vest represents the futures company (self-operated member), so each red vest has a power of attorney for the market representative (trader) issued by the futures company (self-operated member) to the exchange, the content of which is "xx Company authorizes xxx to be the market representative of our company in xxxx Exchange ...", and the following shall be signed and sealed by the legal representative or general manager of the company.

The red vest is a trader of a brokerage firm, and the yellow vest is a staff member of the exchange. At that time, this design did not conform to international practice, and it was a red and yellow vest system with China characteristics.

The origin of vest is the clothing worn by brokers of American stock exchange to facilitate trading activities.