張同學
2022-08-03 10:50沖刺筆記上冊P57 Representative vs Availability bias
沖刺筆記上冊第57頁,behavioral bias提到 Representative 和 Availability bias。 課后題Q5提到,以前某個資產虧錢,現(xiàn)在再也不投這個資產 - 是avaialbility bias,為什么不是representative bias呢? 這里不是很清楚,麻煩老師再給講解一下。謝謝
所屬:CFA Level III > Asset Allocation and Related Decisions in Portfolio Management 視頻位置 相關試題
來源: 視頻位置 相關試題
1個回答
hongbo助教
2022-08-04 14:10
該回答已被題主采納
同學,你好,在Asset Allocation部分原版書的定義如下:Availability bias is an information-processing bias in which people take a mental shortcut when estimating the probability of an outcome based on how easily the outcome comes to mind.
Representativeness, or recency, bias is the tendency to overweight the importance of the most recent observations and information relative to a longer-dated or more comprehensive set of long-term observations and information.
在行為金融部分,原版書的定義如下:
Availability bias is an information-processing bias in which people take a heuristic (sometimes called a rule of thumb or a mental shortcut) approach to estimating the probability of an outcome based on how easily the outcome comes to mind.
Representativeness bias is a belief perseverance bias in which people tend to classify new information based on past experiences and classifications.
在兩部分教材的定義中,availability的定義是非常接近的,就是大腦根據直覺來評估概率,僅僅基于有多么容易想起最近發(fā)生的事情。K不投資新興市場股權,是因為最近家族信托在最近的經濟危機里在這類投資上遭受了損失。所以availability是合適選項。
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追答
行為金融在出題的時候,一般都是讓你從給定的幾個bias里去選擇,避免了非常接近的類似的bias過于難選的問題。
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追問
Representativeness也提到了the most recent observations and information 那按理來說選擇representativene也是對的啊.
或者你給舉一個,在AA下,是representativene的例子,做下對比? -
追答
同學,你好。representative bias在協(xié)會的例子通常類似于:最近幾年房地產漲了很多,所以某塊商業(yè)地產就是好投資;張三是好CEO所以張三管理的公司就是值得投資;蘋果手機是很好的產品,所以蘋果公司的股票值得投資。
