Put options is called "put options", "sell options" or "knock out". The symmetry of call options, one of the types of option transactions, will be sold at a specified price and quantity in a certain day or period in the future.
For example, If the market price of “Object” falls below the agreed price (execution price) in the future, the put option owner can make a profit by selling the asset at the exercise price (the price higher than the current market price), so it is called Put Options. If the market price of “Object” higher than the agreed price, the put option owner can give up the right. European options and American options can be divided according to option performance. European-style options must be held until expiration and cannot be executed in advance. American options can be regarded as European options with pre-execution rights, that is, they can be exercised on any trading day before the expiration date. This RightBTC put option activity is an European option.