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arXiv 2005.05310q-fin.CPq-fin.PR
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行为期权定价的理性金融方法

Rational Finance Approach to Behavioral Option Pricing

Jiexin Dai, Abootaleb Shirvani, Frank J. Fabozzi

摘要:

在期权定价时,对标的价格过程的瞬时平均收益率可能有不同的看法。根据Black(1972)的观点,如果对瞬时平均收益存在不同的观点,这将导致套利机会。行为金融学的支持者认为,这种异质性的观点可能会发生,这将不会影响理性动态资产定价理论提出的期权定价模型,不会引起波动率微笑。为了纠正这一点,行为金融学的一位主要倡导者提出了一个行为期权定价模型。由于期权定价的行为方法和理性方法之间可能存在未被探索的联系,本文以Shefrin(2008)的期权定价模型为例,通过引入套利交易成本来抵消套利交易的收益,提出了一种修正行为金融学期权定价公式的方法,使其与理性动态资产定价理论相一致。

英文摘要:

When pricing options, there may be different views on the instantaneous mean return of the underlying price process. According to Black (1972), where there exist heterogeneous views on the instantaneous mean return, this will result in arbitrage opportunities. Behavioral finance proponents argue that such heterogenous views are likely to occur and this will not impact option pricing models proposed by rational dynamic asset pricing theory and will not give rise to volatility smiles. To rectify this, a leading advocate of behavioral finance has proposed a behavioral option pricing model. As there may be unexplored links between the behavioral and rational approaches to option pricing, in this paper we revisit Shefrin (2008) option pricing model as an example and suggest one approach to modify this behavioral finance option pricing formula to be consistent with rational dynamic asset pricing theory by introducing arbitrage transaction costs which offset the gains from arbitrage trades.

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