Other forms: stockbrokers
A stockbroker is someone who buys, sells, and trades stocks — or shares in companies — for a living. Most stockbrokers work for brokerage firms.
People who have money to invest often buy stocks, which is like buying a small portion of a company, and then sell them when they've increased in value. Someone whose job involves buying and selling stocks for clients is a stockbroker. It's more common these days to use the terms "broker" or "financial adviser," but stockbroker has been around since the 1700's, from the sense of a broker as "someone who buys and sells."