Stock broker
A
stock broker or stockbroker is someone or a
firm who performs transactions in
financial instruments on a
stock market either (1) as an
agent of clients who are unable or unwilling to trade for themselves or (2) as a
principal i.e. on his/her/its own behalf.
When acting as an agent, the stockbroker charges a flat fee and/or a percentage-based commission for undertaking the trade.