Transform normal volatility in expected shortfall
function to compute expected shortfall from volatility for normal random variables.
volaToExpectedShortfall(x, alpha = 0.01, sup = F, ...)
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 |
... |
additional parameters. |
a numeric vector, the expected shortfalls.
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