2. A U.S. bank converted $1 million to Swiss francs to make a Swiss franc loan to a valued corporate customer when the exchange rate was 1.4 francs per dollar. The borrower agreed to repay the principle plus 7% interest in 1 year. The borrower repaid Swiss francs at loan maturity and when the loan was repaid the exchange rate was 1.35 francs per dollar. What was the bank's dollar rate of return?