Estimates VaR with Box-Cox transformation

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Description

Function estimates the VaR of a portfolio assuming P and L data set transformed using the BoxCox transformation to make it as near normal as possible, for specified confidence level and holding period implied by data frequency.

Usage

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BoxCoxVaR(PandLdata, cl)

Arguments

PandLdata

Daily Profit/Loss data

cl

Confidence Level. It can be a scalar or a vector.

Value

Estimated Box-Cox VaR. Its dimension is same as that of cl

Author(s)

Dinesh Acharya

References

Dowd, K. Measuring Market Risk, Wiley, 2007.

Hamilton, S. A. and Taylor, M. G. A Comparision of the Box-Cox transformation method and nonparametric methods for estimating quantiles in clinical data with repeated measures. J. Statist. Comput. Simul., vol. 45, 1993, pp. 185 - 201.

Examples

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# Estimates Box-Cox VaR
   a<-rnorm(100)
   BoxCoxVaR(a,.95)

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