Explanation : Most alternative investments tend to be leptokurtic and negatively skewed
i.e. with fat tails due to positive average returns and long-tails downside
due to potential extreme losses. Since their distribution is not close to
normal distribution but is negatively skewed, standard deviation is not an
appropriate measure for volatility and hence leads to an understated VaR
figure. Moreover, since alternative investments are generally illiquid, the
use of estimated rather than actual transaction prices result in smoothed
out or overstated returns and understated volatility/standard deviation.