Applying VaR to Longer Time Horizons
The standard deviation should be estimated over the time horizon in which the maximum loss is to be measured. Suppose Thai Co. expects to receive USD in 1 month for products it exported. Determine the maximum 1-month loss due to a potential decline in the value of the USD, based on a 95% confidence interval. The estimated standard deviation of monthly percentages of the USD is 6% over the last 40 months. Assume an expected percentage change of -1% during the next month.
Applying VaR to Transaction Exposure of a Portfolio
Since MNCs are commonly exposed to more than one currency, they may apply the VaR method to a currency portfolio. When considering multiple currencies, software packages can be used to perform the computations.