Put option is a financial derivative, which gives the option holder the right to sell the underlying assets at a specific price on a specific date or maturity date in the future, but not the obligation. The timing of selling options depends on the following factors:

Option expiration date: Put options usually have a specific expiration date and can only be exercised before the expiration date. Option holders can choose to exercise options before or on the expiration date.

Price of the underlying asset: Option holders usually consider whether to execute the option before the expiration date of the option or when the market situation becomes unfavorable. If the market price of the underlying asset is lower than the exercise price of the option, the holder can choose to exercise the put option to sell the asset. In this way, the income corresponding to the market price difference can be obtained.

Option contract: the conditions and procedures for exercising options are generally stipulated in the option contract. The holder needs to exercise the option according to the contract.

Investor's strategy: Option holders can decide whether to exercise options according to their own investment strategies and market expectations. Some investors may choose to hold options on the maturity date to obtain greater potential returns.

Not all put options will be executed. If the market price is higher than the exercise price of the option, the option holder usually chooses not to exercise the right, because the price of the assets purchased in the market is lower than the exercise price, and there is no need to sell the assets through the option. Exercising put options usually requires paying royalties. If the market price is higher than the exercise price, the exercise will lead to losses.