You can buy dollars and sell Swiss francs in the 90-day forward market, that is, regardless of the capital gain of dollars, you can lock in the income of 4000/0.5200=7692.3 1 due Swiss francs. After 90 days, the market term exchange rate becomes 0.5500 USD/sq. ft., so you can convert the Swiss francs obtained by forward delivery into USD in the spot market of 7692.538+. Therefore, regardless of the capital gains of USD, the gains from trading (which I think is not suitable for investment) are USD 230.77, and the holding period yield is 5.77% (annualized about 23.08%).