3.(Chapter 19)Consider three stock market indexes:the Dow Jones Industrial Average(DJIA),the S&P 500
and the Nikkei 225.Suppose you forecast that all three indices will have expected returns of 15% and annual
standard deviations of 30%.You forecast that the DJIA and S&P 500 have O.95 correlation.the DJIA and Nikkei
225 have 0.75 correlation, and the S&P 500 and Nikkei 225 have 0.75 correlation. Relative to holding only US stocks,could you improve your risk-adjusted returns by diversifying internationally? Why or why not?