The Human Development Index is measured according to your life expectancy, education, and per capita income. If you have the list of possible answers and there are things that are not one of these three, then that's what your answer is. The HDI statistics vary a bit though in countries where there's inequality of any kind and this inequality is then taken into consideration.
In the 1930's, the best time to sell your stocks would have been around mid-April (this is when they were worth the most.)The best time to buy new stocks would have been when the stock market was at its lowest point,during late October.
