option

(FINANCE) a type of financial derivative; a certificate that gives the owner the right to buy (or sell) a fixed amount of a specific thing for a specific price (the strike price). An option to buy something else is called a call option; an option to sell something else is called a put option. An option has a strike price, which is the price at which you are entitled to buy (or sell) the underlying commodity, or stock, or foreign currency, or whatever. Options allow the owner to speculate in the possibility that market prices will change in a certain direction, without actually spending the value of the underlying item. For example, suppose WTI crude is $85.75/bbl. In order to make $1000 off of a $0.25 increase in the price, you ordinarily would need to own 4000 bbls of crude, which you can't afford. So, instead, you buy a call option for 4000 bbls with a strike price of $85.75/bbl (i.e., exactly what it is now). This option will cost a tiny amount of money. If the price goes up to $86.00/bbl, you don't own the oil, but your options are now worth $1000 to somebody who wants to buy that oil. An option with intrinsic value (for example,a call option whose strike price is less than the spot price) is "in the money." An option with no intrinsic value is "out of the money."