Hello, after receiving a certain amount of royalties, the seller who sells the open position must unconditionally obey the buyer's choice and fulfill the stipulated obligations within a certain period of time.

The expiration date of the option, if it is a virtual value contract or a fair value contract, the buyer will generally choose not to exercise the right, and the seller's profit is the royalty; If it is a real contract, if the buyer exercises the right, the seller's profit and loss amount is: the profit and loss amount of call option = premium-(market price-exercise price) * quantity, and the profit and loss amount of put option = premium-(exercise price-market price) * quantity. (Ignore handling fee)