Chooser option - Financial definition
Concise definition of the term chooser option
A type of option where the option buyer chooses at a specific date whether the option is a call or a put. The strike and the maturity of a chooser option are predetermined and are usually the same for the call and the put.
Comprehensive definition of the term chooser option
Similar to a straddle but cheaper, because the holder must choose at a predetermined date, chooser options are a good way of speculating on extreme moves.