Ally Financial Inc. (NYSE: ALLY) is a leading digital financial services company. Ally Bank, the company's direct banking subsidiary, offers an array of deposit and mortgage products and services. Ally Bank is a Member FDIC and Equal Housing Lender , NMLS ID 181005. Mortgage credit and collateral are subject to approval and additional terms and conditions apply. Programs, rates and terms and conditions are subject to change at any time without notice.
In terms of valuing option contracts, it is essentially all about determining the probabilities of future price events. The more likely something is to occur, the more expensive an option would be that profits from that event. For instance, a call value goes up as the stock (underlying) goes up. This is the key to understanding the relative value of options.
However, options are not the same thing as stocks because they do not represent ownership in a company. And, although futures use contracts just like options do, options are considered lower risk due to the fact that you can withdraw (or walk away from) an options contract at any point. The price of the option (its premium) is thus a percentage of the underlying asset or security.