A stock index option issued by either a corporate or a sovereign entity as part of a security offering, and guaranteed by an option clearing corporation.

a type of security issued by a corporation (usually together with a bond or preferred stock) that gives the holder the right to purchase a certain amount of common stock at a stated price; "as a sweetener they offered warrants along with the fixed-income securities"

a written certificate that gives the holder the right to purchase shares of a stock for a specified price within a specified period of time