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sstModel (version 1.0.0)

volaToExpectedShortfall: Transform normal volatility in expected shortfall

Description

function to compute expected shortfall from volatility for normal random variables.

Usage

volaToExpectedShortfall(x, alpha = 0.01, sup = F, ...)

Arguments

x

a numeric vector of positive volatilities.

alpha

a numeric value. The alpha-Expected Shortfall, must take values between 0 and 1.

sup

a logical value. If TRUE the function returns the upper expected shortfall and otherwise the lower. Default is set to FALSE.

...

additional parameters.

Value

a numeric vector, the expected shortfalls.