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Utility based option evaluation with proportional transaction costs

机译:基于公用事业的期权评估,交易成本成比例

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We examine the problem of finding investors reservation prices of European contingent claims in a continuous time finite horizon economy with proportional transaction costs. We derive analytically numerous properties of reservation prices reflecting their dependency on the size of the option position, the risk aversion, and the initial wealth. For the special case of HARA utility functions, we consider the so-called marginal reservation prices, i.e. unit reservation prices of infinitesimal positions of the contingent claim, and prove that these are independent of the initial wealth and the parameters of the utility function, except for the exponent. Furthermore, we present numerical examples suggesting that the marginal reservation prices are, for reasonable parameter values, insensitive to the drift of the underlying security and the exponent of the HARA utility function.
机译:我们研究了在具有成比例交易成本的连续时间有限时域经济中寻找投资者对欧洲或有债权的保留价的问题。我们从分析中得出保留价格的众多属性,反映了保留价格对期权头寸规模,风险规避和初始财富的依赖性。对于HARA效用函数的特殊情况,我们考虑了所谓的边际保留价格,即或有债权的无穷小头寸的单位保留价格,并证明它们与初始财富和效用函数的参数无关,除了为指数。此外,我们提供的数值示例表明,对于合理的参数值,边际保留价格对基础证券的漂移和HARA效用函数的指数不敏感。

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