報酬率常態分佈假設 - 財務

By Hedy
at 2015-02-04T22:42
at 2015-02-04T22:42
Table of Contents
※ [本文轉錄自 jayhsieh 信箱]
作者: gozule (好冷啊~~) 站內: Quant
標題: [討論] 報酬率常態分佈假設
時間: Wed Aug 27 17:40:39 2014
如標題所寫,許多交易或定價模型(如CAPM, Black-Schole eq.等),
假設標的物(如股票、期貨、選擇權)的報酬率符合常態分佈,
但是在許多文獻與實證研究當中,大家又公認報酬率
有fat tail與volatility clustering的性質,
間接說明了模型的結果是有問題的。
但是為何到了現在這些模型的結果還是常常被引用?
除了這些模型有解析解的因素與欺騙外行人不懂,
還有什麼不為人知的原因嗎?
--
作者: gozule (好冷啊~~) 站內: Quant
標題: [討論] 報酬率常態分佈假設
時間: Wed Aug 27 17:40:39 2014
如標題所寫,許多交易或定價模型(如CAPM, Black-Schole eq.等),
假設標的物(如股票、期貨、選擇權)的報酬率符合常態分佈,
但是在許多文獻與實證研究當中,大家又公認報酬率
有fat tail與volatility clustering的性質,
間接說明了模型的結果是有問題的。
但是為何到了現在這些模型的結果還是常常被引用?
除了這些模型有解析解的因素與欺騙外行人不懂,
還有什麼不為人知的原因嗎?
--
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財務
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