When selling put options and opening positions, the risk is that falling asset prices may lead to the need to buy assets at the agreed strike price.

In order to hedge this risk, the following risk hedging methods can be considered:

1. Hold enough cash: The risk of selling put options is that you may need to buy assets when the asset price falls. In order to hedge this risk, you can hold enough cash to meet the possible purchase demand. In this way, when asset prices fall, you can buy assets in cash without worrying about lack of funds.

2. Buy put options: You can buy put options with the same underlying assets to hedge the risk of selling put options. In this way, if the asset price falls, the value of the put option will rise, which can offset the loss of selling the put option.

3. Use other derivatives: Similar to buying put options, other derivatives can also be used to hedge risks, such as buying call options, futures contracts or option portfolio strategies. These tools can help hedge the risk of selling put options when the price of the underlying assets falls.

4. Build a protective portfolio: You can build a protective portfolio by buying call options and selling put options at the same time, or by other options portfolio strategies. In this way, if the asset price falls, the increase of put option value can offset the loss of call option, thus hedging the risk of selling put option.