A family of derivatives essentially made up of options, e.g. embedded options, over-the-counter options, exchange-traded options and warrants, which give the holder the right, but not the obligation, to buy or sell a fixed amount or quantity of an underlying (for example a financial asset, an index or a commodity) at an agreed price on a specific future date or during a specific period, the option writer being bound by the holder's decision to exercise the option or not.