張同學(xué)
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(gè)資產(chǎn)虧錢,現(xiàn)在再也不投這個(gè)資產(chǎn) - 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(guān)試題
來源: 視頻位置 相關(guān)試題
1個(gè)回答
hongbo助教
2022-08-04 14:10
該回答已被題主采納
同學(xué),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(jù)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(quán),是因?yàn)樽罱易逍磐性谧罱慕?jīng)濟(jì)危機(jī)里在這類投資上遭受了損失。所以availability是合適選項(xiàng)。
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追答
行為金融在出題的時(shí)候,一般都是讓你從給定的幾個(gè)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(gè),在AA下,是representativene的例子,做下對比? -
追答
同學(xué),你好。representative bias在協(xié)會(huì)的例子通常類似于:最近幾年房地產(chǎn)漲了很多,所以某塊商業(yè)地產(chǎn)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(jī)是很好的產(chǎn)品,所以蘋果公司的股票值得投資。
