# Trade of the month: volatility smiles

## Trade of the month: volatility smiles

When considering an underlying asset's behaviour there are two ways to measure volatility - looking at historical and implied volatility. Historical volatility is the standard deviation of the price series of the underlying. It only requires values for the underlying and can be computed in a spreadsheet. Implied volatility is the volatility level that the market is observing through option prices or structured products. This is harder to gauge and requires the existence of a number of liquid opt

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The week on Risk.net, November 10-16, 2017