Customer's order to a broker to buy or sell a security at the price that applies when an exchange opens. If the order is not executed at that time, it is automatically canceled.
In securities trading, a buy order is an instruction to a broker to purchase a specified quantity of a security at the market price or another stipulated price.
A Fill or Kill (FOK) order is an order to buy or sell a particular security that, if not executed immediately, is canceled.
