Options assignment refers to the mandatory fulfillment of the option contract by the seller when the buyer exercises their right. For a call option, the seller is obligated to deliver the underlying asset at the strike price. Conversely, for a put option, the seller must purchase the underlying asset at the strike price. This obligation can occur anytime between purchase and expiration for American-style options, or only at expiration for European-style options.
Process
The assignment process typically begins with the options clearing corporation randomly selecting a short position holder to fulfill the exercised contract. This selection is usually based on a fair and impartial method, such as a random lottery or a pro-rata basis. Once assigned, the short position holder is notified and must then deliver or receive the underlying asset according to the contract terms. The settlement occurs through the broker and clearing house.
Risk
Options assignment introduces significant risk for sellers, especially those with naked positions, as it mandates action regardless of market conditions. An assigned naked call seller faces potentially unlimited losses if the underlying asset price has risen sharply. Managing this risk involves holding sufficient collateral, understanding assignment probabilities, and employing hedging strategies. Traders must remain aware of their assignment exposure, particularly as expiration approaches.
