An option (American option) that automatically deactivates (knocks out) or expires only when a certain price of its underlying (disadvantageous...

A barrier option that is equipped with a knock-out (KO) barrier- a barrier that allows it to deactivate (knock out)...

A barrier option that is equipped with a knock-out barrier- a barrier that allows it to deactivate (knock out) immediately...

A down-and-out option (specifically, a knock-out barrier option/ KO barrier option) that deactivates, i.e., expires if the market price of...