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A Neyman-Pearson problem with ambiguity and nonlinear pricing

机译:具有歧义和非线性定价的Neyman-Pearson问题

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We consider a problem of the Neyman–Pearson type arising in the theory of portfolio choice in the presence of probability weighting, such as in markets with Choquet pricing (as in Araujo et al. in Econ Theory 49(1):1–35, 2011; Cerreia-Vioglio et al. in J Econ Theory 157(1):730–762, 2015; Chateauneuf and Cornet in Submodular financial markets with frictions. Working Paper, 2015; Chateauneuf et al. in Math Finance 6(3):323–330, 1996) and ambiguous beliefs about the payoffs of contingent claims (see Gilboa and Marinacci, in: Acemoglu, Arellano, Dekel (eds) Advances in economics and econometrics: theory and applications, tenth world congress of the econometric society, Cambridge University Press, Cambridge, 2013). Specifically, we consider a problem of optimal choice of a contingent claim so as to minimize a non-linear pricing functional (or a distortion risk measure), subject to a minimum expected performance measure (or a minimum expected return or utility), where expectations with respect to distorted probabilities are taken in the sense of Choquet. Such contingent claims are called cost-efficient. We give an analytical characterization of cost-efficient contingent claims under very mild assumptions on the probability weighting functions, thereby extending some of the results of Ghossoub (Math Financ Econ 10(1):87–111, 2016), and we provide examples of some special cases of interest. In particular, we show how a cost-efficient contingent claim exhibits a desirable monotonicity property: It is anti-comonotonic with the random mark-to-market value (or return, etc.) of the underlying financial position, and it is hence a hedge against such variability.
机译:我们考虑了存在概率加权的情况下,在投资组合选择理论中出现的内曼-皮尔森型问题,例如在具有Choquet定价的市场中(如Araujo等人,Econ Theory 49(1):1-35, 2011; Cerreia-Vioglio等人,《经济理论》 157(1):730-762,2015; Chateauneuf和Cornet在具有摩擦的次模块化金融市场中;工作论文,2015; Chateauneuf等人,Math Finance 6(3): 323–330,1996年)和对或有债权的回报的big昧信念(请参见Gilboa和Marinacci,位于:Acemoglu,Arellano,Dekel(eds)经济学和计量经济学的进展:理论与应用,计量经济学会第十届世界大会,剑桥大学出版社,剑桥,2013年)。具体来说,我们考虑一个最优选择或有债权的问题,以便将非线性定价功能(或失真风险度量)减到最小,这取决于期望的最小预期绩效度量(或最小预期收益或效用)。关于扭曲概率的观点是在Choquet的意义上得出的。这种或有要求被称为具有成本效益。我们在概率加权函数的非常温和假设下对具有成本效益的或有债权进行了分析表征,从而扩展了Ghossoub的某些结果(Math Financ Econ 10(1):87-111,2016),并提供了以下示例一些特殊情况。特别是,我们展示了具有成本效益的或有债权如何表现出理想的单调性:它与基础财务状况的随机市价(或收益等)是反共价的,因此是对冲这种可变性。

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