Which one(s) of the following factors affect the optimal weight of a foreign countrys stocks included in an investment portfolio that does not hedge the currency risk of the foreign investment?

1. I. Expected return of the foreign stocks

2. II. Return volatility of the foreign stocks

3. III. Return correlation between the foreign stocks and domestic stocks

4. IV. Expected exchange rate return, its volatility and its correlation with stock return

   1. Group of answer choices

   2. I and II

   3. I and III

   4. I, II and III

   5. I, II, III and IV