Trading ahead

Trading ahead occurs when a broker-dealer holds a customer order in a security and then trades that same security for its own proprietary account at a price that would have satisfied the customer's order, without filling the customer first. The firm effectively puts its own interests in front of the customer's, which violates its duty to handle customer orders fairly.

For example, suppose a customer places a limit order to buy shares at $50, and the firm then buys shares for its own account at $50 or better while the customer's order sits unfilled. That is trading ahead. Under FINRA Rule 5320, a firm that trades for its own account while holding an unexecuted customer order in the same security at the same or a better price must promptly execute the customer's order up to the size of its own trade at that price or better.

The rule protects investors by ensuring that a firm cannot profit from information about its own customers' pending orders. Trading ahead is closely related to, but distinct from, front-running: front-running typically involves trading ahead of a large block order to profit from the anticipated price move, while trading ahead refers broadly to executing proprietary trades before held customer orders.

Securities exams including the Series 6, Series 63, and Series 65 test trading ahead as a prohibited or unethical business practice. Know that customer orders take priority over the firm's proprietary trades, that FINRA Rule 5320 carries narrow exceptions — including a no-knowledge exception for firms with effective information barriers and a large-order/institutional-account exception where the customer receives written disclosure and does not opt out — and that the remedy is prompt execution of the customer's order at the same or a better price.