The Risk Limited Glossary
V:

V  the Commodity Futures Symbol which represents the October Delivery Month.
Value at Risk (VaR)  a quantitative methodology for estimating market risk. A more detailed description of VaR can be displayed from the Risk Limited Factoids page here.
Variance  a measure of volatility, risk, or statistical dispersion. It is the square of the standard deviation.
VarianceCovariance VaR  linear VaR.
Vega  the measure of change in an option value given a change in the volatility.
Venn Diagram  a pictorial depiction of the relations among sets or events, where set are shown as regions with the overlap of the regions corresponds to the intersection of the sets. If the regions do not overlap, the sets are disjoint.
Volatility  a measurement of the rate of price change of a futures contract, security, or other instrument underlying an option. See also Historical Volatility, Implied Volatility.
Volatility Smile  a condition where implied volatilities for inthemoney and outofthemoney strikes exceed those for atthemoney strikes. Graphically depiction of this condition is a curve in the form of a 'smile', hence the name.
Volumetric Risk  risk resulting from uncertainty and changes in exposure level for usage, productions or other factors. Hedge instruments structured to manage such risks include Swing Options.
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