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pepperhyp · 2023年08月26日

体现两个behavioral bias的证据

NO.PZ2023012803000032

问题如下:

The CIO then suggests updating their stock selection model to incorporate a price momentum factor. Kelly states that she is concerned that momentum will not be effective across all sectors. The CIO counters that because a number of behavioral biases support the persistence of price momentum, they would be foolish not to incorporate this factor. After a brief discussion, the other committee members agree with the CIO and momentum is added to the stock selection model.

Which of the following biases least likely provides behavioral support for the factor being added to the stock selection model?

选项:

A.

Framing

B.

Availability

C.

Hindsight

解释:

Framing bias is a type of cognitive error in which a person answers a question differently based on the way in which it is asked. This behavior is unlikely to explain the persistence of momentum. Regret is a type of hindsight bias that can result in investors purchasing securities after a significant run-up in price because of a fear of not participating. This bias could explain momentum. With availability bias, also referred to as the recency effect, the tendency to recall recent events more vividly can result in investors extrapolating recent price gains into the future. This bias could also explain momentum.

 The CIO counters that because a number of behavioral biases support the persistence of price momentum, they would be foolish not to incorporate this factor. 

是不是前半句表现了availability bias,后半句表现了hindsight bias

1 个答案

王琛_品职助教 · 2023年08月28日

嗨,从没放弃的小努力你好:


1

不是哈,这道题其实考查的是哪些偏差可以解释 momentum 现象

你看题目的问法,也就是最后一个问句,其实是个定于从句,你把 "the factor being added to the stock selection model" 换成 momentum

问句就变成了:Which of the following biases least likely provides behavioral support for momentum

下列哪个偏差最不可能给 momentum 提供行为指导,即最不可能导致 momentum

2

选项 B 和 C 是在讲义中有明确列出的解释

而选项 A 并没有涉及,所以才选的 A 哈

也请参考基础班讲义墨迹版 P163

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