Margin requirement (options) Definition: The amount of cash an uncovered option writer is required to deposit and maintain to cover his daily position valuation and reasonably foreseeable intraday price changes. Nearby Terms Margin of profit Margin of safety Margin requirement (options) Margin security Margin stock
A flexible-fuel vehicle (FFV) or dual-fuel vehicle (colloquially called a flex-fuel vehicle) is an alternative fuel vehicle with an internal combustion engine designed to run on more than one fuel, usually gasoline blended with either ethanol or methanol fuel, and both fuels are stored in the same common tank.
Flexible fuel vehicles (FFVs) are vehicles that can run on fuel blends containing up to 85 percent ethanol, E85. According to the Energy Information Administration, there were more than 8 million FFVs on the road in 2010. That figure may rise as the demand for fuel-efficient vehicles grows.