Benjamin Button does not believe that the international Fisher effect (IFE) holds. Current one-year interest rates in Switzerland are 15 percent, while one-year interest rates in the U.S. are 8 percent. Benjamin converts $100,000 to Swiss francs and invests them in Switzerland. One year later, he converts Swiss francs back to dollars. The current spot rate of Swiss franc is $1.15. If the spot rate of Swiss franc in one year is $1.03, what is Benjamin's percentage return from his strategy?