问题如下:
Which of the following is true regarding the performance of passive trading strategies in a semi-strong-form efficient market?
选项:
A.Passive trading strategies would earn abnormal returns.
B.Passive trading strategies would outperform active trading strategies.
C.Passive trading strategies would underperform active trading strategies.
解释:
B is correct.
For a fund that adopts active trading strategies, costs would be hard to recover, so therefore, passive portfolio management should outperform active portfolio management on a consistent after-cost basis.
请问老师为什么是B不是C呢,能都解释一下意思吗,谢谢