NO.PZ2018101901000013
问题如下：
Under-diversified portfolios are not a potential implication of which of the following behavioral biases?
选项：
A.Representativeness
Illusion of control
Confirmation
解释：
A is correct.
Under-diversified portfolios are a consequence of both illusion of control and confirmation biases. Researchers have found that some investors prefer to invest in companies that they feel they have control over, such as the companies they work for, leading them to hold concentrated positions. Confirmation bias may lead to FMPs ignoring negative news, paying attention only to information confirming that a company is a good investment, which may result in large positions. Representativeness bias is not typically associated with under-diversified portfolios.
过去的经验不是不全面的吗，如果依据过去经验做决策不应该比较局限，可能导致分散化不足？
