Which one the following conditions will guarantee profits for carry traders who borrow in yen and invest in dollars?
The yen interest rate is higher than the dollar interest rate and the exchange rate remains constant.
The yen interest rate is smaller than the dollar interest rate and the exchange rate remains constant.
The yen interest rate is equal to the dollar interest rate and the yen appreciates against the dollar.
The yen interest rate is higher than the dollar interest rate and the yen appreciates against the dollar.