Immediate or Cancel (IOC)

Definition - What does Immediate or Cancel (IOC) mean?

Immediate or Cancel (IOC) is an order that is to be executed as fully as possible immediately and whatever is not executed will be canceled.

Testopedia explains Immediate or Cancel (IOC)

An investor may enter an Immediate or Cancel (IOC) order when the investor needs to execute the order in as part of a trading strategy that includes the purchase or sale of another security such as an option or futures contract. Certain favorable market conditions that make executing the orders advantageous may only exist for a brief period of time.

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