NO.PZ2015121801000002
问题如下：
Which of the following is the best reason for an investor to be concerned with the composition of a portfolio?
选项：
A.Risk reduction.
B.Downside risk protection.
C.Avoidance of investment disasters.
解释：
A is correct.
Combining assets into a portfolio should reduce the portfolio’s volatility. The portfolio approach does not necessarily provide downside protection or guarantee that the portfolio always will avoid losses.
老师，应该怎么理解risk reduction和risk diversification的区别呢？
