how ioc works
investors can submit either a limit or market immediate or cancel order ioc depending on their specific execution requirements an ioc limit order is entered at a particular price whereas an ioc market order has no price attached and transacts with the best offer price for a buy and the best bid price for a sell ioc orders differ from other duration orders in that they only require a partial fill whereas both fok and aon orders must be filled in their entirety or canceled gtc orders remain active until executed in the market or canceled by the client although most brokers cancel them between 30 and 90 days 