Front Running:
Front running is an unethical trading practice where a broker or trader uses advance knowledge of pending large orders of clients to trade ahead of them for personal profit. They execute personal trades before processing clientsβ orders, taking advantage of expected price movements.
For example, Lets say a broker gets an order from a major client to buy 500,000 shares of XYZ Co. Such a huge purchase is bound to drive up the price of the stock immediately, at least in the short term. The broker sets aside the request for a minute and first buys some XYZ stock for his/her own personal portfolio. Then the client's order is executed. The broker immediately sells the XYZ shares and pockets a profit.
Front-running is commonly confused with insider trading, but they are distinct. Insider trading refers to a company insider who trades on advanced knowledge of corporate activitiesβfor example, using their insider knowledge to buy or sell shares ahead of a major announcement.