老师在总结里不是说available也会造成分散化不足吗

问题如下：

Under-diversified portfolios are a potential implication of which of the following behavioral biases?

选项：

A.Representativeness B.

Illusion of control

C.

Available

解释：

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 and available bias is not typically associated with under-diversified portfolios.