The following data applies to a foreign stock investment:
The gain on the stock in foreign currency terms was 22 percent.
The foreign currency has appreciated by 7 percent.
The standard deviation of stock returns was 38 percent and the standard deviation of the foreign currency was 24 percent.
The correlation between the stock returns and the currency is 0.10.
What is the contribution of currency risk?
Answer and Explanation
The contribution of currency risk measures the risk incremental to foreign asset risk from currency risk and is the difference between the asset risk in domestic currency terms and the risk of the foreign asset in foreign currency terms. To obtain the contribution of currency risk, we must first calculate the risk of the asset in domestic currency terms. To obtain the risk of the asset in domestic currency terms, we use the formula for portfolio risk that considers the risk of the asset in foreign currency terms, the risk of the foreign currency, and the correlation between the two: σ$2 = 0.382 + 0.242 + 2(0.38)(0.24)(0.1) = 0.2202 σ$ = √0.2202 = 0.4693 = 46.93% Contribution of Currency = 46.93% - 38.00% = 8.93%
The contribution of currency risk measures the risk incremental to foreign asset risk from currency risk and is the difference between the asset risk in domestic currency terms and the risk of the foreign asset in foreign currency terms. To obtain the contribution of currency risk, we must first calculate the risk of the asset in domestic currency terms. To obtain the risk of the asset in domestic currency terms, we use the formula for portfolio risk that considers the risk of the asset in foreign currency terms, the risk of the foreign currency, and the correlation between the two: σ$2 = 0.382 + 0.242 + 2(0.38)(0.24)(0.1) = 0.2202 σ$ = √0.2202 = 0.4693 = 46.93% Contribution of Currency = 46.93% - 38.00% = 8.93% |