“…In formula (8), i is the return on assets in domestic currency, i * + ΔR is the expected return on foreign assets, R and R * are the respective risks of investors holding domestic currency assets and foreign currency assets, respectively, and κ(i, i * + ΔR, R, R * ), S 1 (i, i * + ΔR, R, R * ), and S 2 (i, i * + ΔR, R, R * ) are the proportions of three assets held respectively. It can be analyzed from formula (4) that when other factors are determined and remain unchanged, if the expected exchange rate level increases, investors will increase the holding proportion of this part of assets in order to obtain greater income.…”