assignment notice explained

An assignment notice is a formal notification received by the seller (writer) of an option that they are required to fulfill their obligation under the terms of the option contract

In options trading, an assignment notice is a critical communication for the seller of an option contract. When an option buyer decides to exercise their right, the corresponding option seller is 'assigned' the obligation to complete the transaction. The assignment notice informs the seller that this has occurred and outlines the specifics of the obligation. For a call option seller, this means selling the underlying asset at the strike price. For a put option seller, it means buying the underlying asset at the strike price. This process generally occurs electronically through the Options Clearing Corporation (OCC) or a similar clearing organization, which randomly allocates exercise notices among sellers of the same option series, although some brokerage firms use other methods.

Consider an investor who sold a call option with a strike price of $50 on XYZ stock, expiring next month, and received a premium for taking on this obligation. If the price of XYZ stock rises to $55, the option buyer might decide to exercise their right to buy shares at $50. When this happens, our investor who sold the call option will receive an assignment notice. This notice obligates them to sell 100 shares of XYZ stock (the standard contract size for one option) to the exercising buyer at the $50 strike price, even though the current market price is $55. The investor must then deliver these shares, either from their existing holdings or by purchasing them in the open market, potentially at a higher price if they do not own them.

Why it matters

Understanding what an assignment notice entails helps option sellers prepare for potential obligations and manage the financial impact of fulfilling their contract terms.
Receiving an assignment notice means a specific transactional action is immediately required, influencing a trader's portfolio management and potential cash flow.
Awareness of the likelihood of receiving an assignment notice is crucial for actively managing assignment risk, especially for in-the-money options.
The notice confirms an option has been exercised, leading directly to the settlement of the contract and subsequent changes in account positions and balances.

Common mistakes

Ignoring an assignment notice can lead to forced liquidation of positions or unexpected margin calls to cover the obligation, creating financial stress.
Not accounting for the exercise of an option after hours can result in a surprise assignment, requiring immediate action the next trading day.
Failing to have sufficient capital or underlying shares readily available to meet an assignment obligation can cause significant losses or penalties.
Underestimating the probability of early assignment for in-the-money options, particularly those near ex-dividend dates, can lead to unexpected portfolio changes.

FAQs

What triggers an assignment notice for an option seller?

An assignment notice is triggered when an option buyer decides to exercise their option contract. This action obligates the seller to fulfill their side of the agreement.

Is an assignment notice the same as an exercise notice?

No, an exercise notice is sent to the OCC by the option buyer's broker. An assignment notice is then sent by the OCC to the seller's broker, informing the seller of their obligation.

What happens if I receive an assignment notice after market hours?

If you receive an assignment notice after market hours, your brokerage will typically process it by the next trading day, and your account will reflect the transaction accordingly.

Can I prevent an assignment notice as an option seller?

You cannot directly prevent an assignment notice once an option is exercised. However, closing your short option position before exercise occurs will remove your obligation.