问

问题如下：

Which of the following statements about portfolio method is correct?

选项：

A.

Investors should use a portfolio approach to reduce the overall volatility of returns.

B.

Investors should use a portfolio approach to monitor overall volatility of returns.

C.

Investors should use a portfolio approach to eliminate the overall volatility of returns.

解释：

A is correct.

The volatility of the portfolio can be reduced by combining assets . Holding porfolios can help individuals and institutions to reduce risk. However, because of the impact of economic change during a period, the risk may not reduce as much as expected.