IOC. An order where the goal is to buy or sell the stated total quantity but is flexible in two distinct senses: The investor will accept any partial fill. The order, whether partially or fully executed, is immediately cancelled thereafter and does not remain open. As a best practice approach, an investor should consider attaching limits to IOC (Immediate Or Cancel) orders.
An order condition that requires all or part of an order to be executed immediately. The part of the order that cannot be executed immediately is canceled.
Instructions to immediately fill as much of a customer's order as possible and cancel any part remaining.
Instructions to immediately fill your order either partially or entirely--or cancel the order. Only applicable to Limit Orders on listed stocks.
When an IOC order is entered, the system will immediately try to match this order as much as possible and cancel the remaining quantity, if any at all. In this attempt, the order might find a partial match.
An order which must be filled immediately or be canceled. IOC orders need not be filled in their entirety.
Immediate or cancel (aka. Fill and Kill or Must be filled) is a security order type instructing that quantity of the the bid or ask is to be executed in full, whatever the price. Once entered, this type of order must be met in full as soon as trading commences.