I think VAR is a very healthy development within the industry.
- Alison MacphersonAlan White and I have not as yet written anything on VAR but we have done a number of consulting projects in this area and expect to do more.
- Alison MacphersonOne important measurement issue concerns the fat tails problem that I mentioned earlier. VAR is concerned with extreme outcomes. If the tails of the probability distributions we are using are too thin, our VAR measures are likely to be too low.
- Alison MacphersonThere are challenges in terms of the measurement of VAR for what are known as nonlinear derivatives, where things like gamma and vega are important dimensions of the risk.
- Alison Macpherson