Fill Or Kill - FOK


DEFINITION of 'Fill Or Kill - FOK'

A type of time-in-force designation used in securities trading that instructs a brokerage to execute a transaction immediately and completely or not at all. This type of order is most likely to be used by active traders and is usually for a large quantity of stock. The order must be filled in its entirety or canceled (killed). The purpose of a fill or kill order is to ensure that a position is entered at a desired price.


Without a fill or kill designation, it might take a prolonged period of time to complete a large order. In reality, however, the fill-or-kill type of trade does not occur very often. Other methods of instructing a brokerage on the time frame in which a trade is to be executed include "immediate or cancel," which means to fill all or part of the order immediately, then cancel any part that cannot be filled, and "good ‘til canceled," which keeps an order open until it is able to be filled at a specified price.

  1. Limit Order

    An order placed with a brokerage to buy or sell a set number ...
  2. At-Or-Better

    An order condition instructing a broker to only fill a transaction ...
  3. Stop-Limit Order

    An order placed with a broker that combines the features of stop ...
  4. Immediate Or Cancel Order - IOC

    An order to buy or sell a security that if not immediately filled, ...
  5. Kill

    To cancel a trade or order that has been placed, but not filled. ...
  6. Market Order

    An order that an investor makes through a broker or brokerage ...
Related Articles
  1. Investing Basics

    Principal Trading and Agency Trading

    Ever wonder what happens behind the scenes when you buy or sell a stock? Read on and find out!
  2. Investing Basics

    Understanding Order Execution

    Find out the various ways in which a broker can fill an order, which can affect costs.
  3. Active Trading Fundamentals

    The Basics Of Trading A Stock

    Taking control of your portfolio means knowing what orders to use when buying or selling stocks.
  4. Technical Indicators

    Using Pivot Points For Predictions

    Learn one of the most common methods of finding support and resistance levels.
  5. Investing Basics

    Quit Your Job To Trade Stocks

    Changes in technology have turned trading into a career field that’s easy to enter. But staying in it is a different story.
  6. Active Trading Fundamentals

    5 Must Watch Films and Documentaries for Day Traders

    Discover these five must-watch films and documentaries for day traders reviewed with the takeaway lessons that inspire, motivate and entertain.
  7. Trading Strategies

    The Traits All Baller Traders Have In Common

    When it comes to traders, these are the traits that separate the wheat from the chaff.
  8. Active Trading Fundamentals

    Playing It Safe With Trades? Or Holding Yourself Back?

    Fear of breaking out of a comfort zone can prevent an investor from reaching his or her full potential.
  9. Mutual Funds & ETFs

    The Top 7 ETFs For Day Trading

    ETFs that offer cost efficiency with high liquidity are ideal for day trading. Here are some of the top ETFs for day trading.
  10. Investing Basics

    4 Movies Showing the Real Side of Finance

    Read about the most accurate and realistic movies about the financial industry and the people who have to work every day in a fast-paced, high-stakes arena.
  1. How can I use a buy limit order to buy a stock?

    An investor uses a buy limit order to buy a stock at a specific price or better price. Unlike a market order that takes the ... Read Full Answer >>
  2. How do I place an order to buy or sell shares?

    It is easy to get started buying and selling stocks, especially with the advancements in online trading since the turn of ... Read Full Answer >>
  3. How do I set a strike price in foreign exchange trading?

    In trading with a foreign exchange, a trader can set a strike price for a currency pair by entering a limit order or a stop ... Read Full Answer >>
  4. How do I place a buy limit order if I want to buy a stock during an initial public ...

    During an initial public offering, or IPO, a trader may place a buy limit order by choosing "Buy" and "Limit" in the order ... Read Full Answer >>
  5. Is it better practice to use a stop order or a limit order?

    Both stop orders and limit orders have their advantages and disadvantages; traders need to decide between the two based on ... Read Full Answer >>
  6. Are stop orders only used for stocks?

    Stop orders can be used for a variety of securities and are not limited to stocks. They can be extended to other securities, ... Read Full Answer >>

You May Also Like

Hot Definitions
  1. Barefoot Pilgrim

    A slang term for an unsophisticated investor who loses all of his or her wealth by trading equities in the stock market. ...
  2. Quick Ratio

    The quick ratio is an indicator of a company’s short-term liquidity. The quick ratio measures a company’s ability to meet ...
  3. Black Tuesday

    October 29, 1929, when the DJIA fell 12% - one of the largest one-day drops in stock market history. More than 16 million ...
  4. Black Monday

    October 19, 1987, when the Dow Jones Industrial Average (DJIA) lost almost 22% in a single day. That event marked the beginning ...
  5. Monetary Policy

    Monetary policy is the actions of a central bank, currency board or other regulatory committee that determine the size and ...
  6. Indemnity

    Indemnity is compensation for damages or loss. Indemnity in the legal sense may also refer to an exemption from liability ...
Trading Center