What does FOK mean in stock trading?

What does FOK mean in stock trading?

In stock market trading, the term ‘FOK’ stands for “fill or kill”. It is an order type that must be filled in entirety. Otherwise, it will be entirely cancelled. FOK orders are often used by high-frequency traders and institutional investors who must execute large trades quickly and accurately. This article will explore what FOK means in stocks and how it can affect a trader’s strategy.

What does FOK mean in stock trading?

The acronym “FOK” refers to “fill or kill” orders placed on financial markets. This type of order requires immediate execution or will be terminated altogether. It means that all or none of the FOK orders will be completed.

FOK orders are often used by high-frequency traders and institutional investors looking to execute large trades in a concise time frame. These orders are instrumental when trading illiquid stocks, as they allow immediate execution of the desired share amount at the specified price.

Why use FOK?

Using a FOK order provides traders with several benefits over traditional market orders. Firstly, an investor can be sure that their entire order is filled or killed in one go, meaning there is no need to manually place multiple orders and monitor them throughout the day. Secondly, this type of order is not subject to price slippage, often experienced when trading with more significant share amounts.

Moreover, FOK orders have proven to help avoid market volatility. If the price of a stock moves significantly while an order is being filled, it may not be complete and will be automatically cancelled instead. It helps traders avoid losses due to unpredictable market conditions.

What are the risks associated with FOK?

Despite its benefits, some risks are associated with this type of order. Firstly, if the required amount of stocks cannot be filled at the specified price, then the entire order will be cancelled without any partial execution taking place. It means that investors must ensure they enter realistic limit prices which can be met for their desired quantity of shares before they set an order.

Secondly, FOK orders are generally subject to higher fees than other types due to their time-sensitive nature and the resources required to complete them. It can be a significant disadvantage for investors who do not have large amounts of capital available.

What are other types of orders used in stock trading

Here are some other common types of orders used in stock trading:

Market order

A market order is an order that is placed with a UK broker to buy or sell a security at the current market rate. This type of order ensures that your trade will be executed immediately, but there is no guarantee of the price you will pay for the stock.

Limit order

A limit order lets UK traders buy or sell a stock at a set price or better. The order will be executed automatically if the share price reaches your limit. However, if it does not reach your limit, your trade may not be filled and must be re-entered later.

Stop loss order

A stop-loss order allows traders to set an automatic trigger point to close their position if the stock’s price moves against them. It helps protect investors from significant losses due to sudden shifts in the market and ensures profits are taken when they reach a certain level.

Stop limit order

Stop limit orders combine elements of stop loss and limit orders by allowing investors to set both a maximum purchase/sell price and minimum purchase/sell prices for their stocks. The investor’s order will be executed once either of these levels has been reached.

All or no orders

An all-or-none order requires that a trade must be filled in its entirety or cancelled entirely. This type of order is usually used by investors who need to buy or sell large blocks of shares as it guarantees the order can be filled without partial executions.

Good till cancelled orders

Good till cancelled orders are placed with a broker and remain open until the investor cancels them. They can be used to buy or sell stocks at any point within a specified time frame, such as for the day or week. Traders who trade stocks online often use this order type to automate their trading strategies.


The term “FOK” stands for “fill or kill” orders in stock market trading and refers to an order type that must either be filled in entirety or cancelled entirely. FOK orders are often used by high-frequency traders and institutional investors looking to execute large trades quickly and accurately, providing them with benefits such as not being subject to price slippage and protecting against market volatility. However, they also come with risks, such as potentially higher fees than other orders and possibly having the entire order cancelled if it cannot be filled at the specified price. By understanding what FOK means in stocks and the different types of stock market orders available, traders in the UK will be better able to make informed decisions regarding their trading strategies. This improved knowledge can help to minimise risks while maximising potential profits.

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