任选期权又称选择人期权(Chooser Option)，指在—定期限内可由多头选择该期权为看多期权依旧看空期权的期权。
An option where the investor has the opportunity to choose whether the option is a put or call at a certain point in time during the life of the option.
Also known as 'hermaphrodite option' or 'AC-DC option'.