NO.PZ2015121802000055
问题如下：
If a portfolio plots inside the effective frontier, which of the following is correct?
选项：
A.
The portfolio is an efficient portfolio.
B.
The portfolio is an inefficient portfolio.
C.
The portfolio is a global minimum-variance portfolio.
解释：
B is correct.
Portfolios that plots inside the minimum-variance frontier are inefficient portfolios because there will be another portfolio with a higher expected return for the same level of risk, or a lower level of risk for the same expected return.
那如果是outside呢？也是inefficient 吗？
