Suppose you start with $100 and buy stock in when the exchange rate is 1 = $1.5. One year later, the stock price changes to 75, and you sell it. At the time of sale, exchange rate is 1 = $1.6.

What is your return (just) due to the exchange rate?

Multiple Choice

12.5%. -20%. -6.67%. -7.5%. 6.67%. 20%.