Fill-or-kill orders behave as:

Fill-or-kill orders behave as:

• A. Flexible partial fills
• B. Executed immediately in full, or deleted
• C. Can be left unfilled for hours
• D. Cancel at end of day

Answer: (B)

Fill-or-kill orders require the entire order to be filled immediately or not at all. If the market can execute all the requested quantity right away, it happens in full; if it cannot, the entire order is canceled instead of filling partially. This is why the option describing immediate full execution or deletion best captures the behavior. It contrasts with orders that allow partial fills or that can wait or be canceled at a later time. For example, attempting to buy 500 shares as a FOK: you either get all 500 instantly at the chosen terms, or you get nothing.

Fill-or-kill orders require the entire order to be filled immediately or not at all. If the market can execute all the requested quantity right away, it happens in full; if it cannot, the entire order is canceled instead of filling partially. This is why the option describing immediate full execution or deletion best captures the behavior. It contrasts with orders that allow partial fills or that can wait or be canceled at a later time. For example, attempting to buy 500 shares as a FOK: you either get all 500 instantly at the chosen terms, or you get nothing.