Understanding AON orders in stocks


An-or-None (AON) order is a condition in stock trading that allows traders to place purchase or sell orders. These orders come with instructions for brokers to either fulfil the entire order or not execute it. This condition ensures precision and control in executing trades, providing traders with the flexibility to manage their investments effectively. 

This type of order is beneficial when dealing with larger quantities of stocks, as it ensures that the investor’s specific requirements are entirely met, minimising the risk of partial execution and potential market impact. By utilising AON orders, traders can maintain greater control over their transactions, aiming for optimal outcomes and maximising their investment strategies.

The mechanics of AON order

When a trader places an AON order, they demand the brokerage to secure all the desired shares at their desired price. The order will only be executed if their demand is met. This type of monitoring is essential if there is a possibility of the stock price changing before all the shares can be obtained. It also helps prevent slippage as it eliminates partial transaction executions and ensures that entry and exit points are precise as determined by the investor.

Benefits of an AON order 

AON orders provide two main advantages for a stocks trade. The first is that it eliminates the risk of partial execution and prevents slippage. With this type of order, traders can be specific that their total number of shares will be purchased or sold as per their instructions, with no extra cost incurred in case of a partial transaction. 


The second benefit is that an AON order ensures maximum flexibility regarding trading strategies. By eliminating the possibility of partial execution, traders can use sophisticated strategies such as pairs trading and market timing without worrying about unexpected changes in stock prices.

Drawbacks of AON orders 

One drawback of using an AON order is that it may take a lot of work to obtain the desired stock when dealing with large orders. Since an AON order requires all shares to be bought or sold at once, it might take time for the brokerage to complete a transaction as they need to find enough stocks in the market willing to meet the terms of the investor. Sometimes, a trader may need to adjust their limit price or revise the number of shares they plan to trade to ensure their order can be filled. 


Another potential issue with AON orders is that they may need to be more suitable for volatile markets. As previously mentioned, this type of order requires all shares to be bought or sold simultaneously and ensures no partial executions. However, for fast-moving stocks, the market price may change significantly between when an order is placed and when it can be filled. Therefore, investors should thoroughly consider the advantages and drawbacks of AON orders before using them for their stock trading strategies.

How to place an AON order

When incorporating an AON order into a comprehensive stock trading strategy, investors must clearly understand the necessary details when submitting instructions. By following these steps, investors can ensure their AON orders are executed effectively, minimising the risk of partial execution and potential market impact.

Determine the number of shares

Begin by assessing the number of shares you wish to purchase or sell. This step allows you to establish a precise goal and align your trading strategy accordingly.

Set the limit price

Consider prevailing market conditions and your desired outcome to determine the limit price for your AON order. This thoughtful consideration ensures that your order aligns with your investment objectives.

Specify order type

Choose between a market order or a limit order type based on your trading preferences and the specific requirements of your investment strategy.

Indicate AON order

Indicate that your order is an AON order, which ensures that the entire order will be executed or none at all. This characteristic of AON orders offers enhanced control and minimises the risk of incomplete transactions.

Submit the order

Transmit your order to your broker and diligently monitor its progress until completion. Staying informed about the execution of your AON order allows you to make real-time decisions and adapt to any changing market conditions.


By following these comprehensive steps, investors can leverage the power of AON orders to improve their trading outcomes. With a thorough understanding of how an AON order works and the precise steps involved in placing one, traders can confidently utilise this tool to maximise their investment strategies and achieve optimal results.

Final thoughts

An All-or-None (AON) order is a powerful tool for stock traders that provides greater control over their investments. By eliminating the risk of partial execution and preventing slippage, AON orders can help traders maintain precise entry and exit points for their trading strategies. 


Investors should also be aware of the potential drawbacks of this type of order, as it may only sometimes be possible to obtain all desired stocks or be unsuitable for volatile markets. With a thorough understanding of the mechanics and advantages of AON orders, stock traders can use this tool to achieve optimal trading outcomes. 



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