Final answer:
Considering only the expected local currency equity returns, the United Kingdom offers the best investment opportunity at a 13.5% return, higher than that of Japan's 10% and the United States' 11.4%.
Step-by-step explanation:
When assessing equity investment opportunities overseas, one important factor for investors to consider is the expected return in local currency terms, without factoring in exchange rate fluctuations. The question provided gives three different countries with their corresponding expected local currency equity returns. These are 10% for Japan, 13.5% for the United Kingdom (UK), and 11.4% for the United States (US). If we evaluate these investments based solely on the expected equity returns and disregard potential gains or losses from exchange rate changes, the UK appears to provide the highest expected return at 13.5%, making it the most attractive investment opportunity amongst the options provided. Therefore, based on the expected local currency equity returns alone, the best investment opportunity would be in the United Kingdom.