Once you've run solver for the global minimum variance portfolio, look at positions C331:C350. These are the weights you would invest in each country to get the minimum variance portfolio. Are these weights practical? How much does diversifying improve your minimum variance portfolio in the 1990 to 2017 period? Once you've run solver for the global minimum variance portfolio, look at positions C331:C350. These are the weights you would invest in each country to get the minimum variance portfolio. Are these weights practical? How much does diversifying improve your minimum variance portfolio in the 1990 to 2017 period?