An agent who transacts business with the broker in the stock exchange is a

An agent who transacts business with the broker in the stock exchange is a jobber. A jobber is a type of middleman who acts as an intermediary between a broker and a customer in the stock exchange. Jobbers buy and sell securities on behalf of their clients, typically at a markup or commission. They play an important role in the stock exchange by facilitating the buying and selling of securities and helping to create liquidity in the market. By acting as intermediaries, jobbers provide a valuable service to both buyers and sellers in the stock exchange, helping to match buyers and sellers, negotiate prices, and execute trades.