Final answer:
The nominal interest rate per annum is 6.00% for the U.S. and 4.00% for the U.K., calculated using the Fisher effect. The expected future spot exchange rate in three years, considering inflation differences, is approximately $1.4351/£. We cannot infer the one-year forward rate without specific market data.
Step-by-step explanation:
To compute the nominal interest rates per annum for both the United States and the U.K., we use the Fisher effect, which states that the nominal interest rate is approximately the sum of the real interest rate and the expected inflation rate. Therefore, the nominal interest rate in the United States (US) would be 6.00% (2.5% + 3.5%) and in the U.K. it would be 4.00% (2.5% + 1.5%).
For the expected future spot dollar-pound exchange rate in three years, we need to consider the expected inflation rates in each country. Using the formula S = S0 * (1 + i_foreign)/(1 + i_domestic), where S is the future spot rate, S0 is the current spot rate, i_foreign is the inflation rate in the foreign (U.K.) country, and i_domestic is the inflation rate in the domestic (U.S.) country, we expect the future spot exchange rate (S) to be approximately $1.4351/£.
We cannot directly infer the forward exchange rate from the given information as it would require knowledge of the specific forward rate quotes or interest rate parity, which is not provided. The forward rate is influenced by the current spot rate and the interest rate differential between the two countries.