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Trading Options: Understanding Assignment

The options market can seem to have a language of its own. To the average investor, there are likely a number of unfamiliar terms, but for an individual with a short options position—someone who has sold call or put options—there is perhaps no term more important than " assignment "—the fulfilling of the requirements of an options contract.

Options trading carries risk and requires specific approval from an investor's brokerage firm. For information about the inherent risks and characteristics of the options market, refer to the Characteristics and Risks of Standardized Options also known as the Options Disclosure Document (ODD).

When someone buys options to open a new position ("Buy to Open"), they are buying a right —either the right to buy the underlying security at a specified price (the strike price) in the case of a call option, or the right to sell the underlying security in the case of a put option.

On the flip side, when an individual sells, or writes, an option to open a new position ("Sell to Open"), they are accepting an obligation —either an obligation to sell the underlying security at the strike price in the case of a call option or the obligation to buy that security in the case of a put option. When an individual sells options to open a new position, they are said to be "short" those options. The seller does this in exchange for receiving the option's premium from the buyer.

Learn more about  options from FINRA or access free courses like Options 101 at OCC Learning .

American-style options allow the buyer of a contract to exercise at any time during the life of the contract, whereas European-style options can be exercised only during a specified period just prior to expiration. For an investor selling American-style options, one of the risks is that the investor may be called upon at any time during the contract's term to fulfill its obligations. That is, as long as a short options position remains open, the seller may be subject to "assignment" on any day equity markets are open. 

What is assignment?

An option assignment represents the seller's obligation to fulfill the terms of the contract by either selling or buying the underlying security at the exercise price. This obligation is triggered when the buyer of an option contract exercises their right to buy or sell the underlying security.

To ensure fairness in the distribution of American-style and European-style option assignments, the Options Clearing Corporation (OCC), which is the options industry clearing house, has an established process to randomly assign exercise notices to firms with an account that has a short option position. Once a firm receives an assignment, it then assigns this notice to one of its customers who has a short option contract of the same series. This short option contract is selected from a pool of such customers, either at random or by some other procedure specific to the brokerage firm. 

How does an investor know if an option position will be assigned?

While an option seller will always have some level of uncertainty, being assigned may be a somewhat predictable event. Only about 7% of options positions are typically exercised, but that does not imply that investors can expect to be assigned on only 7% of their short positions. Investors may have some, all or none of their short positions assigned.

And while the majority of American-style options exercises (and assignments) happen on or near the contract's expiration, a long options holder can exercise their right at any time, even if the underlying security is halted for trading. Someone may exercise their options early based upon a significant price movement in the underlying security or if shares become difficult to borrow as the result of a pending corporate action such as a buyout or takeover. 

Note: European-style options can only be exercised during a specified period just prior to expiration. In U.S. markets, the majority of options on commodity and index futures are European-style, while options on stocks and exchange-traded funds (ETF) are American-style. So, while SPDR S&P 500, or SPY options, which are options tied to an ETF that tracks the S&P 500, are American-style options, S&P 500 Index options, or SPX options, which are tied to S&P 500 futures contracts, are European-style options.

What happens after an option is assigned?

An investor who is assigned on a short option position is required to meet the terms of the written option contract upon receiving notification of the assignment. In the case of a short equity call, the seller of the option must deliver stock at the strike price and in return receives cash. An investor who doesn't already own the shares will need to acquire and deliver shares in return for cash in the amount of the strike price, multiplied by 100, since each contract represents 100 shares. In the case of a short equity put, the seller of the option is required to purchase the stock at the strike price.

How might an investor's account balance fluctuate after opening a short options position?

It is normal to see an account balance fluctuate after opening a short option position. Investors who have questions or concerns or who do not understand reported trade balances and assets valuations should contact their brokerage firm immediately for an explanation. Please keep in mind that short option positions can incur substantial risk in certain situations.

For example, say XYZ stock is trading at $40 and an investor sells 10 contracts for XYZ July 50 calls at $1.00, collecting a premium of $1,000, since each contract represents 100 shares ($1.00 premium x 10 contracts x 100 shares). Consider what happens if XYZ stock increases to $60, the call is exercised by the option holder and the investor is assigned. Should the investor not own the stock, they must now acquire and deliver 1,000 shares of XYZ at a price of $50 per share. Given the current stock price of $60, the investor's short stock position would result in an unrealized loss of $9,000 (a $10,000 loss from delivering shares $10 below current stock price minus the $1,000 premium collected earlier).

Note: Even if the investor's short call position had not been assigned, the investor's account balance in this example would still be negatively affected—at least until the options expire if they are not exercised. The investor's account position would be updated to reflect the investor's unrealized loss—what they could lose if an option is exercised (and they are assigned) at the current market price. This update does not represent an actual loss (or gain) until the option is actually exercised and the investor is assigned. 

What happens if an investor opened a multi-leg strategy, but one leg is assigned?

American-style option holders have the right to exercise their options position prior to expiration regardless of whether the options are in-, at- or out-of-the-money. Investors can be assigned if any market participant holding calls or puts of the same series submits an exercise notice to their brokerage firm. When one leg is assigned, subsequent action may be required, which could include closing or adjusting the remaining position to avoid potential capital or margin implications resulting from the assignment. These actions may not be attractive and may result in a loss or a less-than-ideal gain.

If an investor's short option is assigned, the investor will be required to perform in accordance with their obligation to purchase or deliver the underlying security, regardless of the overall risk of their position when taking into account other options that may be owned as part of the overall multi-leg strategy. If the investor owns an option that serves to limit the risk of the overall spread position, it is up to the investor to exercise that option or to take other action to limit risk. 

Below are a couple of examples that underscore how important it is for every investor to understand the risks associated with potential assignment during market hours and potentially adverse price movements in afterhours trading.

Example #1: An investor is short March 50 XYZ puts and long March 55 XYZ puts. At the close of business on March expiration, XYZ is priced at $56 per share, and both puts are out of the money, which means they have no intrinsic value. However, due to an unexpected news announcement shortly after the closing bell, the price of XYZ drops to $40 in after-hours trading. This could result in an assignment of the short March 50 puts, requiring the investor to purchase shares of XYZ at $50 per share. The investor would have needed to exercise the long March 55 puts in order to realize the gain on the initial multi-leg position. If the investor did not exercise the March 55 puts, those puts may expire and the investor may be exposed to the loss on the XYZ purchase at $50, a $10 per share loss with XYZ now trading at $40 per share, without receiving the benefit of selling XYZ at $55.

Example #2: An investor is short March 50 XYZ puts and long April 50 XYZ puts. At the close of business on March expiration, XYZ is priced at $45 per share, and the investor is assigned XYZ stock at $50. The investor will now own shares of XYZ at $50, along with the April 50 XYZ puts, which may be exercised at the investor's discretion. If the investor chooses not to exercise the April 50 puts, they will be required to pay for the shares that were assigned to them on the short March 50 XYZ puts until the April 50 puts are exercised or shares are otherwise disposed of.

Note: In either example, the short put position may be assigned prior to expiration at the discretion of the option holder. Investors can check with their brokerage firm regarding their option exercise procedures and cut-off times.

For options-specific questions, you may contact OCC's Investor Education team at [email protected] , via chat on OptionsEducation.org or subscribe to the OIC newsletter . If you have questions about options trading in your brokerage account, we encourage you to contact your brokerage firm. If after doing so you have not resolved the issue or have additional concerns, you can contact FINRA .

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Options Assignment

How can i tell when i will be assigned.

You can never tell when you will be assigned. Once you sell an American-style option (put or call), you have the potential for assignment to fulfill your obligation to receive (and pay for) or deliver (and are paid for) shares of stock on any business day. In some circumstances, you may be assigned on a short option position while the underlying shares are halted for trading, or perhaps while they are the subjects of a buyout or takeover.

To ensure fairness in the distribution of equity and index option assignments, OCC utilizes a random procedure to assign exercise notices to clearing member accounts maintained with OCC. The assigned firm must then use an exchange-approved method (usually a random process or the first-in, first-out method) to allocate notices to its accounts that are short the options.

Some generalizations might help you understand likelihood of assignment on a short-option position:

• Option holders only exercise about 7% of options. The percentage hasn't varied much over the years. That does not mean that you can only be assigned on 7% of your short option. It means that, in general, option exercises are not that common.
• The majority of option exercises (and the corresponding assignments) occurs as the option gets closer to expiration. It usually doesn't make sense to exercise an option, which has any time premium over intrinsic value. For most options, that doesn't occur until close to expiration.
• In general terms, an investor is more likely to exercise a put that goes in-the-money than a call that goes in-the-money. Why? Think about the result of an exercise. An investor who exercises a put uses it to sell shares and receive cash. A person exercising a call option uses it to buy shares and must pay cash. Option holders are more likely to exercise options if it means they can receive cash sooner. The opposite is true for calls, where exercise means you have to pay cash sooner.

The bottom line is that you really don't have any sure-fire way to predict when you will be assigned on a short option position. It can happen any day the stock market is open for trading.

Could I be assigned if my covered calls are in-the-money?

If i am short a call option (on a covered write) and i buy back my short call, is it possible for..., if i am short a call option (on a covered write) and i buy back my short call, is it possible for me to be assigned (and the stock position to be called away) that night, i sold short 10 options contracts recently. unfortunately, i was assigned early on each contract..., i sold short 10 options contracts recently. unfortunately, i was assigned early on each contract, one at a time. couldn't all the contracts have been assigned at once, are options automatically assigned when they are in-the-money at expiration is there a way that..., are options automatically assigned when they are in-the-money at expiration is there a way that i can avoid assignment.

OCC encourages all investors to inform their brokerage firm of their exercise intentions for their long options at expiration. While each firm may have their own thresholds, OCC employs an administrative procedure where options that are $.01 in-the-money are exercised unless contrary instructions are provided. Customers and brokers should check with their firm's operations department to determine their company's policies regarding exercise thresholds.

An option holder has the right to exercise their option regardless of the price of the underlying security. It is a good practice for all option holders to express their exercise (or non-exercise) instructions to their broker. Is there a magic number that ensures that option writers will not be assigned? No. Although unlikely, an investor may choose to exercise a slightly out-of-the-money option or choose not to exercise an option that is in-the-money by greater than $.01.

Some investors use the saying, "when in doubt, close them out.” This means that if they buy back any short contracts, they are no longer at risk of assignment.

I wrote a slightly out-of-the-money covered call. The call has since moved in-the-money. Is there...

I wrote a slightly out-of-the-money covered call. the call has since moved in-the-money. is there any way to avoid assignment on that short call, if i buy-to-close a short option position, how can i be sure i will not be assigned.

You will want to first check with your broker to ensure that an assignment has not already occurred.

Because OCC processes closing buy transactions before exercises, there is no possibility of being assigned on positions that were closed during that day's trading hours.

When I sell an option to open, is my only chance of assignment (and being required to fulfill my...

When i sell an option to open, is my only chance of assignment (and being required to fulfill my obligations as the option writer) when the person or entity that bought from me decides to exercise.

No. There are several reasons why this is untrue. First, the buy side of your opening sale could have been a closing purchase by someone who was already short the option. Second, OCC allocates assignments randomly. Anyone short that particular option is at risk of assignment when an option holder decides to exercise. Third, assuming the other side of your trade was an opening purchase, they may sell to close at any time but since you are still short, you are at risk of assignment.

As long as you keep a short option position open, you are at risk of assignment. Assignment risk increases as the option becomes deeper in-the-money and as expiration approaches (the option trades with less time premium). Assignment risk also increases just before the ex-dividend date for short calls and just after the ex-dividend date for short puts.

At expiration, OCC exercises all equity options that are in-the-money by $.01 or more unless the option holder instructs their broker not to exercise or the stock has been removed from OCC’s exercise-by-exception processing.

The exchanges recently halted trading on a stock where I’m short puts. Am I still obligated to...

The exchanges recently halted trading on a stock where i’m short puts. am i still obligated to purchase the security if assigned.

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Options and Derivatives

Strategy & Education

Assignment: Definition in Finance, How It Works, and Examples

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and behavioral finance. Adam received his master's in economics from The New School for Social Research and his Ph.D. from the University of Wisconsin-Madison in sociology. He is a CFA charterholder as well as holding FINRA Series 7, 55 & 63 licenses. He currently researches and teaches economic sociology and the social studies of finance at the Hebrew University in Jerusalem.

Yarilet Perez is an experienced multimedia journalist and fact-checker with a Master of Science in Journalism. She has worked in multiple cities covering breaking news, politics, education, and more. Her expertise is in personal finance and investing, and real estate.

What Is an Assignment?

Assignment most often refers to one of two definitions in the financial world:

• The transfer of an individual's rights or property to another person or business. This concept exists in a variety of business transactions and is often spelled out contractually.
• In trading, assignment occurs when an option contract is exercised. The owner of the contract exercises the contract and assigns the option writer to an obligation to complete the requirements of the contract.

Key Takeaways

• Assignment is a transfer of rights or property from one party to another.
• Options assignments occur when option buyers exercise their rights to a position in a security.
• Other examples of assignments can be found in wages, mortgages, and leases.

Property Rights Assignment

Assignment refers to the transfer of some or all property rights and obligations associated with an asset, property, contract, etc. to another entity through a written agreement. For example, a payee assigns rights for collecting note payments to a bank. A trademark owner transfers, sells, or gives another person interest in the trademark. A homeowner who sells their house assigns the deed to the new buyer.

To be effective, an assignment must involve parties with legal capacity, consideration, consent, and legality of object.

A wage assignment is a forced payment of an obligation by automatic withholding from an employee’s pay. Courts issue wage assignments for people late with child or spousal support, taxes, loans, or other obligations. Money is automatically subtracted from a worker's paycheck without consent if they have a history of nonpayment. For example, a person delinquent on $100 monthly loan payments has a wage assignment deducting the money from their paycheck and sent to the lender. Wage assignments are helpful in paying back long-term debts.

Another instance can be found in a mortgage assignment. This is where a mortgage deed gives a lender interest in a mortgaged property in return for payments received. Lenders often sell mortgages to third parties, such as other lenders. A mortgage assignment document clarifies the assignment of contract and instructs the borrower in making future mortgage payments, and potentially modifies the mortgage terms.

A final example involves a lease assignment. This benefits a relocating tenant wanting to end a lease early or a landlord looking for rent payments to pay creditors. Once the new tenant signs the lease, taking over responsibility for rent payments and other obligations, the previous tenant is released from those responsibilities. In a separate lease assignment, a landlord agrees to pay a creditor through an assignment of rent due under rental property leases. The agreement is used to pay a mortgage lender if the landlord defaults on the loan or files for bankruptcy . Any rental income would then be paid directly to the lender.

Options Assignment

Options can be assigned when a buyer decides to exercise their right to buy (or sell) stock at a particular strike price . The corresponding seller of the option is not determined when a buyer opens an option trade, but only at the time that an option holder decides to exercise their right to buy stock. So an option seller with open positions is matched with the exercising buyer via automated lottery. The randomly selected seller is then assigned to fulfill the buyer's rights. This is known as an option assignment.

Once assigned, the writer (seller) of the option will have the obligation to sell (if a call option ) or buy (if a put option ) the designated number of shares of stock at the agreed-upon price (the strike price). For instance, if the writer sold calls they would be obligated to sell the stock, and the process is often referred to as having the stock called away . For puts, the buyer of the option sells stock (puts stock shares) to the writer in the form of a short-sold position.

Suppose a trader owns 100 call options on company ABC's stock with a strike price of $10 per share. The stock is now trading at $30 and ABC is due to pay a dividend shortly. As a result, the trader exercises the options early and receives 10,000 shares of ABC paid at $10. At the same time, the other side of the long call (the short call) is assigned the contract and must deliver the shares to the long.

Trading Instruments

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What Is an Option Assignment?

Definition and Examples of Assignment

How does assignment work, what it means for individual investors.

Morsa Images / Getty Images

An option assignment represents the seller of an option’s obligation to fulfill the terms of the contract by either selling or purchasing the underlying security at the exercise price. Let’s explain what that means in more detail.

Key Takeaways

• An assignment represents the seller of an option’s obligation to fulfill the terms of the contract by either selling or purchasing the underlying security at the exercise price. 
• If you sell an option and get assigned, you have to fulfill the transaction outlined in the option.
• You can only get assigned if you sell options, not if you buy them.
• Assignment is relatively rare, with only 7% of options ultimately getting assigned.

An assignment represents the seller of an option’s obligation to fulfill the terms of the contract by either selling or purchasing the underlying security at the exercise price. Let’s explain what that means in more detail.

When you sell an option to someone, you’re selling them the right to make you engage in a future transaction. For example, if you sell someone a put option , you’re promising to buy a stock at a set price any time between when the transaction happens and the expiration date of the option.

If the holder of the option doesn’t do anything with the option by the expiration date, the option expires. However, if they decide that they want to go through with the transaction, they will exercise the option. 

If the holder of an option chooses to exercise it, the seller will receive a notification, called an assignment, letting them know that the option holder is exercising their right to complete the transaction. The seller is legally obligated to fulfill the terms of the options contract.

For example, if you sell a call option on XYZ with a strike price of $40 and the buyer chooses to exercise the option, you’ll be assigned the obligation to fulfill that contract. You’ll have to buy 100 shares of XYZ at whatever the market price is, or take the shares from your own portfolio and sell them to the option holder for $40 each.

Options traders only have to worry about assignment if they sell options contracts. Those who buy options don’t have to worry about assignment because in this case, they have the power to exercise a contract, or choose not to.

The options market is huge, in that options are traded on large exchanges and you likely do not know who you’re buying contracts from or selling them to. It’s not like you sell an option to someone you know and they send you an email if they choose to exercise the contract, rather it is an organized process.

In the U.S., the Options Clearing Corporation (OCC), which is considered the options industry clearinghouse, helps to facilitate the exchange of options contracts. It guarantees a fair process of option assignments, ensuring that the obligations in the contract are fulfilled.

When an investor chooses to exercise a contract, the OCC randomly assigns the obligation to someone who sold the option being exercised. For example, if 100 people sold XYZ calls with a strike of $40, and one of those options gets exercised, the OCC will randomly assign that obligation to one of the 100 sellers.

In general, assignments are uncommon. About 7% of options get exercised, with the remaining 93% expiring. Assignment also tends to grow more common as the expiration date nears.

If you are assigned the obligation to fulfill an options contract you sold, it means you have to accept the related loss and fulfill the contract. Usually, your broker will handle the transaction on your behalf automatically.

If you’re an individual investor, you only have to worry about assignment if you’re involved in selling options. Even then, assignments aren't incredibly common. Less than 7% of options get assigned and they tend to get assigned as the option’s expiration date gets closer.

Having an option assigned does mean that you are forced to lock in a loss on an option, which can hurt. However, if you’re truly worried about assignment, you can plan to close your position at some point before the expiration date or use options strategies that don’t involve selling options that could get exercised.

The Options Industry Council. " Options Assignment FAQ: How Can I Tell When I Will Be Assigned? " Accessed Oct. 18, 2021.

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Ready for Options Trading? Make Sure You Understand Assignment First

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Your first assignment: decoding this important options term before you start trading.

The options market can seem to have a language of its own. To the average investor, there are likely a number of unfamiliar terms, but for an individual with a short options position—someone who has sold call or put options—there is perhaps no term more important than " assignment "—the fulfilling of the requirements of an options contract.

When someone buys options to open a new position ("Buy to Open"), they are buying a  right —either the right to buy the underlying security at a specified price (the strike price) in the case of a call option, or the right to sell the underlying security in the case of a put option.

Image source: Getty Images

On the flip side, when an individual sells, or writes, an option to open a new position ("Sell to Open"), they are accepting an  obligation —either an obligation to sell the underlying security at the strike price in the case of a call option or the obligation to buy that security in the case of a put option. When an individual sells options to open a new position, they are said to be "short" those options. The seller does this in exchange for receiving the option's premium from the buyer.

American-style options allow the buyer of a contract to exercise at any time during the life of the contract, whereas European-style options can be exercised only during a specified period just prior to expiration. For an investor selling American-style options, one of the risks is that the investor may be called upon at any time during the contract's term to fulfill its obligations. That is, as long as a short options position remains open, the seller may be subject to "assignment" on any day equity markets are open. 

What is assignment?

An option assignment represents the seller's obligation to fulfill the terms of the contract by either selling or buying the underlying security at the exercise price. This obligation is triggered when the buyer of an option contract exercises their right to buy or sell the underlying security.

To ensure fairness in the distribution of American-style and European-style option assignments, the Options Clearing Corporation (OCC), which is the options industry clearing house, has an established process to randomly assign exercise notices to firms with an account that has a short option position. Once a firm receives an assignment, it then assigns this notice to one of its customers who has a short option contract of the same series. This short option contract is selected from a pool of such customers, either at random or by some other procedure specific to the brokerage firm. 

How does an investor know if an option position will be assigned?

While an option seller will always have some level of uncertainty, being assigned may be a somewhat predictable event. Only about 7% of options positions are typically exercised, but that does not imply that investors can expect to be assigned on only 7% of their short positions. Investors may have some, all or none of their short positions assigned.

And while the majority of American-style options exercises (and assignments) happen on or near the contract's expiration, a long options holder can exercise their right at any time, even if the underlying security is halted for trading. Someone may exercise their options early based upon a significant price movement in the underlying security or if shares become difficult to borrow as the result of a pending corporate action such as a buyout or takeover. 

Note: European-style options can only be exercised during a specified period just prior to expiration. In U.S. markets, the majority of options on commodity and index futures are European-style, while options on stocks and exchange-traded funds (ETF) are American-style. So, while SPDR S&P 500 , or SPY options, which are options tied to an ETF that tracks the S&P 500, are American-style options, S&P 500 Index options, or SPX options, which are tied to S&P 500 futures contracts, are European-style options.

What happens after an option is assigned?

An investor who is assigned on a short option position is required to meet the terms of the written option contract upon receiving notification of the assignment. In the case of a short equity call, the seller of the option must deliver stock at the strike price and in return receives cash. An investor who doesn't already own the shares will need to acquire and deliver shares in return for cash in the amount of the strike price, multiplied by 100, since each contract represents 100 shares. In the case of a short equity put, the seller of the option is required to purchase the stock at the strike price.

How might an investor's account balance fluctuate after opening a short options position?

It is normal to see an account balance fluctuate after opening a short option position. Investors who have questions or concerns or who do not understand reported trade balances and assets valuations should contact their brokerage firm immediately for an explanation. Please keep in mind that short option positions can incur substantial risk in certain situations.

What does "XYZ July 50" mean? XYZ = the ticker symbol of the security July = the month when the option will expire 50 = $50, the strike price on the option

For example, say XYZ stock is trading at $40 and an investor sells 10 contracts for XYZ July 50 calls at $1.00, collecting a premium of $1,000, since each contract represents 100 shares ($1.00 premium x 10 contracts x 100 shares). Consider what happens if XYZ stock increases to $60, the call is exercised by the option holder and the investor is assigned. Should the investor not own the stock, they must now acquire and deliver 1,000 shares of XYZ at a price of $50 per share. Given the current stock price of $60, the investor's short stock position would result in an unrealized loss of $9,000 (a $10,000 loss from delivering shares $10 below current stock price minus the $1,000 premium collected earlier).

Note: Even if the investor's short call position had not been assigned, the investor's account balance in this example would still be negatively affected—at least until the options expire if they are not exercised. The investor's account position would be updated to reflect the investor's unrealized loss—what they  could  lose if an option is exercised (and they are assigned) at the current market price. This update does not represent an actual loss (or gain) until the option is actually exercised and the investor is assigned. 

What happens if an investor opened a multi-leg strategy, but one leg is assigned?

American-style option holders have the right to exercise their options position prior to expiration regardless of whether the options are in-, at- or out-of-the-money. Investors can be assigned if any market participant holding calls or puts of the same series submits an exercise notice to their brokerage firm. When one leg is assigned, subsequent action may be required, which could include closing or adjusting the remaining position to avoid potential capital or margin implications resulting from the assignment. These actions may not be attractive and may result in a loss or a less-than-ideal gain.

If an investor's short option is assigned, the investor will be required to perform in accordance with their obligation to purchase or deliver the underlying security, regardless of the overall risk of their position when taking into account other options that may be owned as part of the overall multi-leg strategy. If the investor owns an option that serves to limit the risk of the overall spread position, it is up to the investor to exercise that option or to take other action to limit risk. 

Below are a couple of examples that underscore how important it is for every investor to understand the risks associated with potential assignment during market hours and potentially adverse price movements in afterhours trading.

Example #1: An investor is short March 50 XYZ puts and long March 55 XYZ puts. At the close of business on March expiration, XYZ is priced at $56 per share, and both puts are out of the money, which means they have no intrinsic value. However, due to an unexpected news announcement shortly after the closing bell, the price of XYZ drops to $40 in after-hours trading. This could result in an assignment of the short March 50 puts, requiring the investor to purchase shares of XYZ at $50 per share. The investor would have needed to exercise the long March 55 puts in order to realize the gain on the initial multi-leg position. If the investor did not exercise the March 55 puts, those puts may expire and the investor may be exposed to the loss on the XYZ purchase at $50, a $10 per share loss with XYZ now trading at $40 per share, without receiving the benefit of selling XYZ at $55.

Example #2: An investor is short March 50 XYZ puts and long April 50 XYZ puts. At the close of business on March expiration, XYZ is priced at $45 per share, and the investor is assigned XYZ stock at $50. The investor will now own shares of XYZ at $50, along with the April 50 XYZ puts, which may be exercised at the investor's discretion. If the investor chooses not to exercise the April 50 puts, they will be required to pay for the shares that were assigned to them on the short March 50 XYZ puts until the April 50 puts are exercised or shares are otherwise disposed of.

Note: In either example, the short put position may be assigned prior to expiration at the discretion of the option holder. Investors can check with their brokerage firm regarding their option exercise procedures and cut-off times.

For options-specific questions, you may contact OCC's Investor Education team at  [email protected] , via chat on  OptionsEducation.org  or  subscribe to the OIC newsletter . If you have questions about options trading in your brokerage account, we encourage you to contact your brokerage firm. If after doing so you have not resolved the issue or have additional concerns, you can  contact FINRA .

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Options Basics: How the Option Assignment Process Works

July 23, 2021 — 12:46 pm EDT

Written by [email protected] for Schaeffer  ->

There is a lot of technical jargon that is specific to the options market. For a beginner who is aiming to learn how to trade options, understanding these technical terms is crucial to optimizing trading results. One phrase that is a critical part of this options trading language is “assignment.” Simply defined, the assignment of an option refers to the fulfillment of the options contract by the seller. An option holder has the right to buy or sell the underlying equity at the given strike price. Once the holder decides to exercise the option, the option is said to be “assigned.” If a trader sells options, he must be aware of the assignment process and the risks it entails. We recommend subscribing to one of Schaeffer's options trading newsletters  to gain the ultimate insights into the language of the options market while making money, too.

What Does it Mean to Write an Option?

When an options seller writes an options contract, this is known as a “sell to open” trade, as he is essentially opening a new position. As the trader is selling the option to open this position, he is technically said to be “short” that underlying stock. The seller accepts a responsibility to sell or buy the underlying security in lieu of a premium received from the buyer. As a general rule, an option holder can exercise his rights any time before the contract expires. In order to learn to trade options, it is necessary to grasp this structure of corresponding rights and duties. It's important to also note that most options are exercised when they are nearing expiry because, after that, the options contract is worthless.

How Does the Option Assignment Process Work?

The assignment process is done at random by the Options Clearing Corporation (OCC) . A trader will become more acquainted with the operations of the OCC as he or she learns to trade options. When a buyer exercises his option, the OCC will randomly connect them with a brokerage that is short on options of that equity. Due to the lottery-like nature of the process, it is almost impossible to predict when an investor’s option may be assigned.

2 Categories of Options to Understand

As a brief summary, let’s go over the two basic categories of options. These categories and their respective merits become apparent as one learns to trade options. In a call option, the option holder possesses the right to buy the security before the contract expires. In this scenario, the seller’s obligation is to sell the option upon assignment.

The inverse of this is the put option. In this category, the holder has the right to sell to the security at the contract price. The consequence of this is that upon assignment, the seller must purchase the security at the strike price. If an investor does not own the stock, he must first buy it. After this, he must deliver it to the holder.

Initially, a seller has an edge in the options trading process. He starts with a net benefit as a premium is paid to him by the buyer without him giving any monetary return immediately. If an option is never exercised, the seller actually retains the premium if the contract expires.

However, the issues arise as the contract nears its expiry, as the chances of assignment increase exponentially. The problem for investors when called to assign are three-fold: 1) they have no control over when the option is exercised, 2) they must fulfill their end of the bargain irrespective of whether this could lead to a loss or a low gain, and 3) even if the underlying stock is not trading, in a call option the deliver the stock to the buyer.

Can an Options Seller Predict When an Option Will Be Exercised?

It would be misleading if we were say there is some magic formula that we could use to predict when an option will be exercised. Traders will understand how frequent assignment occurs once they more completely learn to trade options. However, a general statistic is that approximately 7% of options are actually ever exercised. Even though, technically, an option can be assigned any time while the contract remains open, option holders usually exercise their option near its expiration date. This is because traders usually wait to find the ideal time and observe trading prices. As you learn to trade options, you will realize that very few buyers ever exercise options ahead of expiration.

When is Options Assignment Less Likely?

Even though we cannot accurately predict when an option will be exercised, there are certain indicators traders can use. These indicators are easier to see when you learn to trade options and observe market trends.

An assignment is less probable when an option is out-of-the-money. An option is out-of-the-money when the security is trading at a higher value in the market as compared to the strike price. It is rarely recommended to sell an option that is out-of-the-money. This is because if the strike price is lower than the market value, the option holder will make a loss on the contract. If the strike price is $30, and the market value is $20 and the holder exercises the call option, they will end up taking a loss since they are buying it at a higher price. As investors learn to trade options, they can better predict the time of assignment with greater accuracy.

The views and opinions expressed herein are the views and opinions of the author and do not necessarily reflect those of Nasdaq, Inc.

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• Trading Strategies
• Options Trading Basics

Options Exercise, Assignment, and More: A Beginner’s Guide to Options Expiration

Learn about options exercise and options assignment before taking a position, not afterward. This guide can help you navigate the dynamics of options expiration.

Key Takeaways

• Learn the basics of options exercise and options assignment
• Understand the difference between in-the-money and out-of-the-money options
• The surest way to avoid exercise or assignment is to liquidate or roll a position ahead of expiration, but remember, assignment of a short option can happen at any time 

So your trading account has gotten options approval and you recently made that first trade—say, a long call in XYZ with a strike price of $105. Then the option expires, and at the time, XYZ is trading at $105.30.

Wait. The stock’s above the strike. Is that in the money (ITM) or out of the money (OTM)? Do I need to do something? Do I have enough money in my account? Help!

Please, please, please: Don’t be that trader. The time to learn the mechanics of options expiration is before you make your first trade. Opening an account at TD Ameritrade entitles you to a host of free trading education, including an entire course on options trading. (And at the end of this article, you’ll find a short video covering the basics.)

Here’s a guide to help you navigate options exercise and assignment — along with a few other basics.

Memorize This Table (or Cut It Out and Paste It to Your Screen)

The buyer (“owner”) of an option has the right, but not the obligation, to exercise the option on or before expiration. A call option gives the owner the right to buy the underlying security; a put option gives the owner the right to sell the underlying security.

Conversely, when you sell an option, you may be assigned the underlying asset—at any time regardless of the ITM amount—if the option owner chooses to exercise. The option seller has no control over assignment and no certainty as to when it could happen.

An option will likely be exercised if it’s in the option owner’s best interest to do so, meaning if it’s advantageous from a price standpoint for the owner to take or to close a position in the underlying security at the strike price rather than at the prevailing price in the open market. After the close on expiration day, ITM options may be automatically exercised, whereas OTM options are not and typically expire worthless (often referred to as being “abandoned”). The table below spells it out.

This assumes a position is held all the way through expiration. Of course, you typically don’t need to do that. And in many cases, the usual strategy is to close out a position ahead of the expiration date. We’ll revisit the close-or-hold decision in the next section and look at ways to do that. But assuming you do carry the options position until the end, there are a few things you need to consider:

• Know your specs .Each standard equity options contract controls 100 shares of the underlying stock. That’s pretty straightforward. Non-standard options may have different deliverables. Non-standard options can represent a different number of shares , shares of stock of more than one company, or underlying shares and cash. Other products—such as equity index options or options on futures—have  different contract specs .
• Offsetting positions will match and close .Suppose you’re long 300 shares of XYZ and short one ITM call that’s assigned. That call is deliverable into 100 shares, so you’ll be left with 200 shares of XYZ if the option is assigned.

Exercise and Assignment: It’s Not Just at Expiration!

Standard U.S. equity options are American-style options, meaning they can be exercised anytime before expiration. If you’re short an option that’s deep ITM, it’s possible you’ll get assigned early. ITM short call positions are particularly vulnerable if a company is about to issue a dividend. ( Learn more about options and dividend risk .)

• It’s automatic, for the most part . If an option is ITM by as little as $0.01 at expiration, it will automatically be exercised for the buyer and assigned to a seller. However, there’s something called a Do Not Exercise request that a long option holder can submit if they want to abandon an option. In such a case, it’s possible that a short ITM position might not be assigned. For more, see the note below on pin risk, or refer to this advanced options expiration article . 
• You’d better have enough cash . If an XYZ option is exercised or assigned and you don’t have an offsetting position, you’ll essentially be exchanging an options position for a position in the underlying. A long call or a short put will result in a long position in XYZ; a short call or a long put will result in a short position in XYZ. For long stock positions, you need to have enough cash to cover the purchase or else you’ll be issued a margin call, which you must meet by adding funds to your account. But that timeline may be short, and the broker, at its discretion, has the right to liquidate positions in order to meet a margin call. If exercise or assignment involves taking a short stock position, you need a margin account and sufficient funds in the account to cover the margin requirement.
• Short equity positions are risky business . An uncovered short call or a long put, if assigned or exercised, will result in a short position. If you’re short a stock, you have potentially unlimited risk because there’s no limit to the price increase of a security. There’s also no guarantee the brokerage firm can continue to maintain that short position for an unlimited time period. So if you’re a newbie, it’s generally inadvisable to carry a position into expiration if there’s a chance you might end up with a short stock position.   

A note on pin risk : It’s rare, but occasionally a stock settles right on a strike price at expiration. So if you were short the 105 calls and XYZ settled at exactly $105, there would be no automatic assignment, but depending on the actions taken by the option holder, you may or may not be assigned—and you may not be able to trade out of any unwanted positions until the next business day.

But it goes beyond the exact price issue. What if an option is ITM as of the market close, but news comes out after the close (but before the exercise decision deadline) that sends the stock up or down through the strike price? Remember: The holder of the option could submit a Do Not Exercise request. 

This uncertainty and potential exposure is called pin risk, and the best way to avoid it is to close your position before expiration.

The Decision Tree: How to Approach Expiration

As expiration approaches, you have three choices. Depending on the circumstances—and your objectives and risk tolerance—any of these might be the best decision for you. 

Are options the right choice for you?

While options trading involves unique risks and is definitely not suitable for everyone, if you believe options trading fits with your risk tolerance and overall investing strategy, TD Ameritrade can help you pursue your options trading strategies with powerful trading platforms, idea generation resources, and the support you need.

Learn more about the potential benefits and risks of trading options.

Let the chips fall where they may . Some positions may not require as much maintenance. An options position that’s deeply OTM will likely go away on its own, but occasionally an option that’s been left for dead springs back to life. If it’s a long option, that might feel like a windfall; if it’s a short option that could’ve been closed out for a penny or two, you might be kicking yourself for not doing so.

Conversely, you might have a covered call against long stock, and the strike price was your exit target. For example, if you bought XYZ at $100 and sold the 110-strike call against it, and XYZ rallies to $113, you might be content with the $10 profit (plus the premium you took in when you sold the call, but minus any transaction costs). In that case, you can let assignment happen.

Close it out . If you’ve met your objectives for a trade—for better or worse—it might be time to close it out. Otherwise, you might be exposed to risks that aren’t commensurate with any added return potential (like the short option that could’ve been closed out for next to nothing, then suddenly came back into play).

The close-it-out category also includes ITM options that could result in an unwanted position or the calling away of a stock you didn’t want to part with. And remember to watch the dividend calendar. If you’re short a call option near the ex-dividend date of a stock, the position might be a candidate for early exercise. If so, you may want to consider getting out of the position well in advance—perhaps a week or more. Keep in mind, there is no guarantee that there will be an active market for an options contract, so it is possible to end up stuck and unable to close an options position.        

Roll it to something else . This is the third choice. Rolling is essentially two trades executed as a spread. One leg closes out the existing option; the other leg initiates a new position. For example, suppose you’re short a covered XYZ call at the July 105 strike, the stock is at $103, and the call’s about to expire. You could roll it to the August 105 strike. Or, if your strategy is to sell a call that’s $5 OTM, you might roll to the August 108 call. Keep in mind that rolling strategies can entail additional transaction costs, including multiple contract fees, which may impact any potential return. 

The Bottom Line on Options Expiration

You don’t enter an intersection and  then  check to see if it’s clear. You don’t jump out of an airplane and  then  test the rip cord. So do yourself a favor. Get comfortable with the mechanics of options expiration before you make your first trade. Your beating heart will thank you. 

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Content intended for educational/informational purposes only. Not investment advice, or a recommendation of any security, strategy, or account type.

Be sure to understand all risks involved with each strategy, including commission costs, before attempting to place any trade. Clients must consider all relevant risk factors, including their own personal financial situations, before trading.

Margin trading increases risk of loss and includes the possibility of a forced sale if account equity drops below required levels. Margin is not available in all account types. Margin trading privileges subject to TD Ameritrade review and approval. Carefully review the Margin Handbook and Margin Disclosure Document for more details. Please see our website or contact TD Ameritrade at 800-669-3900 for copies.

The risk of loss on an uncovered call options position is potentially unlimited since there is no limit to the price increase of the underlying security. The naked put strategy includes a high risk of purchasing the corresponding stock at the strike price when the market price of the stock will likely be lower. Naked options strategies involve the highest amount of risk and are only appropriate for traders with the highest risk tolerance. 

Spreads and other multiple-leg options strategies can entail additional transaction costs which may impact any potential return. These are advanced options strategies and often involve greater risk, and more complex risk, than basic options trades.

Please note that the examples above do not account for transaction costs or dividends. Options orders placed online at TD Ameritrade carry a $0.65 fee per contract. Orders placed by other means will have additional transaction costs.

Market volatility, volume, and system availability may delay account access and trade executions.

Past performance of a security or strategy does not guarantee future results or success.

Options are not suitable for all investors as the special risks inherent to options trading may expose investors to potentially rapid and substantial losses. Options trading subject to TD Ameritrade review and approval. Please read Characteristics and Risks of Standardized Options before investing in options.

Supporting documentation for any claims, comparisons, statistics, or other technical data will be supplied upon request.

This is not an offer or solicitation in any jurisdiction where we are not authorized to do business or where such offer or solicitation would be contrary to the local laws and regulations of that jurisdiction, including, but not limited to persons residing in Australia, Canada, Hong Kong, Japan, Saudi Arabia, Singapore, UK, and the countries of the European Union.

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Understanding Options Assignment: What It Means and How to Respond

Mar 22, 2022 Educational

Some Quick Definitions

• Exercise — When an option contract is executed by the option buyer.
• Assignment — What happens to shares of an option contract. As an option seller, you can be assigned 100 long shares of stock per put option contract and 100 short shares of stock per call option.
• Call Option — Gives the owner the right to call (buy) shares from the option seller.
• Put Option — Gives the owner the right to put (sell) shares to the option seller.
• Short Option — Selling an option contract.
• Long Option — Buying an option contract.

A Cautionary Tale

What is option assignment, handling assignment, avoiding options assignment.

• The option is deep in the money, even if there is a lot of time until the expiration date
• The option is in the money and it is near or at expiration

Final Thoughts

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