Market-On-Close Orders_ Benefits and Drawbacks

Market-On-Close Orders: Benefits and Drawbacks

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Market-On-Close (MOC) requests are a critical facet of the dynamic financial market. They offer dealers a unique opportunity. They can execute operations at the closing price of the market. It provides both advantages and challenges.

Understanding the nuances of MOC trading is essential. It is favored by institutional dealers. They’re mutual funds and pension funds. They’re looking to efficiently navigate the complexities of executing large operations. At the same time, they want to minimize market impact. But they come with limitations. It includes a lack of control over execution prices and exposure to potential risks.

This article delves into the intricacies of MOC. We will comprehensively explore its benefits and drawbacks.

It’s a type of market order. It’s used in financial securities, such as stocks and exchange-traded funds (ETFs). It instructs the broker to execute the trade at the closing price of the exchange day. In other words, it seeks to buy or sell a specific quantity of security as close to the market’s closing price as possible.

MOC requests are often used by institutional dealers. They’re mutual funds, pension funds, and large asset managers. It’s to execute large operations efficiently. They are typically placed shortly before the market’s closing bell. It’s to take advantage of the closing price. It can be significant for various reasons, including portfolio rebalancing and benchmark tracking.

Benefits of MOC Trading

Benefits of MOC Trading

Market-On-Close (MOC) is a unique type. It offers distinct advantages to dealers.

MOC allows participants to execute trades at the closing price of the market. It creates opportunities and advantages that set it apart from other strategies. Whether you are an institutional or an individual retail dealer doesn’t matter. Understanding the benefits of MOC can help you make informed decisions. And it will enhance your experience.

Let’s explore the various benefits associated with MOC trading:

  • Price Certainty. One of the primary benefits is that MOC provides dealers with price certainty. By executing at the closing price, dealers can avoid the price fluctuations. Those can occur during the exchange day. This is important to ensure operations do not significantly impact the market price.
  • Liquidity Use. MOC requests can help dealers efficiently use available liquidity in the market. They are executed at the close of the day when exchange volumes are typically higher. MOC requests are more likely to be filled completely. This is especially helpful for large requests. They might otherwise have difficulty finding enough liquidity during regular exchange hours.
  • Reduced Market Impact. Large operations can have a large impact on a security’s price if executed during regular exchange hours. MOC stock orders allow institutional dealers to cut their market impact. It’s done by executing operations when the market is less sensitive to their activity. This can help prevent adverse price movements that may result from a large request.
  • Portfolio Rebalancing. Many institutional dealers use MOC requests for portfolio rebalancing. By executing operations at the closing price, they can bring their portfolios in line with their target asset allocations without causing excessive price changes in the securities they are buying or selling.
  • Benchmark Tracking. For index funds and ETFs, tracking the benchmark index’s performance is crucial. MOC requests enable these funds to closely replicate the benchmark’s closing prices. It helps them achieve their investment objectives more effectively.

Drawbacks of MOC Trading

Drawbacks of MOC Trading

Market-On-Close requests offer several advantages. But they also come with their share of drawbacks:

  • Lack of Control. MOC requests do not provide control over the exact execution price. Dealers are dependent on the closing price. It may not always align with their desired price. This lack of control can be a drawback when precision in execution is paramount.
  • Price Risk. Because MOC requests are executed at the closing price, dealers are usually exposed to any significant price movements. They may occur in the last moments of the day. There may be unexpected news or a sudden market event. Then, the closing price may differ from the price at which the dealer intended to execute the request.
  • Limited Flexibility. MOC stock orders are typically only available for execution at the end of the day. It means dealers cannot adapt to changing market conditions or news on exchange day. For some, this lack of adaptability can be a significant drawback.
  • Imbalance Risk. In some cases, the market may experience an early MOC imbalance. There is a substantial excess of buy or sell requests at the close. This imbalance can lead to price distortions. And it may result in less favorable execution prices for MOC requests.
  • Limited Applicability. MOC requests are most suitable for institutional dealers with large request sizes. Dealers with smaller portfolios may not benefit as much from MOC requests. The cost savings and efficiencies may not outweigh the drawbacks for smaller operations.

Examples of Market-On-Close Order

Let’s explore a few scenarios where MOC requests could be beneficial:

  • Example 1. Portfolio Rebalancing. Imagine an investment manager overseeing a mutual fund that tracks the S&P 500 index. At the end of the quarter, the fund needs to rebalance its portfolio to match the index’s composition. The manager submits MOC requests to do this efficiently and cut market impact. It’s to buy or sell the required shares at the closing price.
  • Example 2. Large Block Trade. An institutional dealer wants to sell a significant number of shares in a company. They want to avoid causing a sharp decline in the stock’s price during regular exchange hours. Then, they place an MOC request to sell the shares at the closing price. This ensures a more orderly exit from the position.

Example 3. ETF Creation and Redemption. Authorized participants in ETFs use MOC requests to create or redeem ETF shares. When creating new ETF shares, they submit MOC stock orders to deliver the underlying securities in exchange for ETF shares at the closing price. Similarly, when redeeming ETF shares, they submit MOC requests to receive the underlying securities in exchange for ETF shares at the closing price.


Now you know what market on close is. It offers distinct advantages for institutional dealers. It provides price certainty, reduces market impact, and can be instrumental in rebalancing. But it also comes with drawbacks. It includes limited control over execution price and exposure to potential price risk. The suitability depends on the specific objectives and request sizes.

In the dynamic world of finance, understanding different request types is essential for avoiding mistakes. It’s for making informed decisions. Weigh the benefits and drawbacks of MOC requests. And then, you can determine whether this request type aligns with your trading strategies and risk tolerance.


MOC stands for “Market-On-Close” in finance. It is an order type used to execute trades at the closing price of the market.

Day trading involves opening and closing positions within the same trading day. It’s often with the goal of profiting from short-term price movements. MOC trading involves executing trades at the closing price of the market. It’s typically for longer-term investment or portfolio management purposes.

It occurs when there is a significant disparity between the buy and sell orders for a security submitted as MOC orders before the market’s closing. This imbalance can impact the execution price of MOC orders. And it may lead to price distortions.

MOC orders are often associated with institutional investors. But individual retail traders can also use them. But the suitability of MOC orders for retail traders depends on factors. They’re order size and trading objectives. Retail traders may find MOC orders more beneficial for larger trades. There, minimizing market impact is crucial.

MOC orders are typically submitted shortly before the market’s closing bell. It’s usually during a specific window of time designated by the exchange. The exact timeframe can vary depending on the exchange rules and market regulations. It’s essential for traders to check with their brokers or the exchange. It’s to determine the submission deadline for MOC orders on the market they are trading.

It’s when there is a large disparity between the quantity of buy orders and sell orders. This imbalance can state a potential price impact. It’s because the market attempts to match these orders at the closing price. Traders and market participants closely track MOC imbalances. They can affect the final execution price. And they may lead to price volatility during the closing auction.

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