• A derivative financial instrument whose value depends, at least in part, on the value of the underlying asset or liability. Essentially, its value is “derived” from the value of some underlying asset such as a commodity or stock. For example, if an individual or entity holds an option to purchase 1,000 shares of a particular stock at a set price, the value of the option will increase as the value of the share increases. Risk managers and financial officers often use derivatives as a method of managing their business risks.