Final answer:
When a country's currency is expected to appreciate, it can lead to a decrease in the country's interest rates.
Step-by-step explanation:
When a country's currency is expected to appreciate in value, it means that the currency is expected to strengthen against other currencies. In this case, the international investor expects the British pound (£) to buy $1.60 in U.S. currency instead of its current exchange rate of $1.50.
As a result of the expected appreciation, the investor may convert a significant sum of Pound Sterling to US dollars to purchase US Treasury bonds. This increase in demand for US Treasury bonds can lead to a decrease in their yields, which is essentially the interest rate paid on the bonds. Therefore, the expected effect on the UK real interest rate is that it falls.
Overall, when a country's currency is expected to appreciate, it can lead to a decrease in the country's interest rates due to increased demand for foreign assets.