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Arbitrage and utility maximization in market models with an insider

机译:有内部人员的市场模型中的套利和效用最大化

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We study arbitrage opportunities, market viability and utility maximization in market models with an insider. Assuming that an economic agent possesses an additional information in the form of an $$mathscr {F}_T$$ F T -measurable discrete random variable G , we give criteria for the no unbounded profits with bounded risk property to hold, characterize optimal arbitrage strategies, and prove duality results for the utility maximization problem faced by the insider. Examples of markets satisfying NUPBR yet admitting arbitrage opportunities are provided. For the case when G is a continuous random variable, we consider the notion of no asymptotic arbitrage of the first kind (NAA1) and give an explicit construction for unbounded profits if NAA1 fails.
机译:我们与内部人士一起研究市场模型中的套利机会,市场生存能力和效用最大化。假设经济主体以$$-mathscr {F} _T $$ FT-可测量的离散随机变量G的形式拥有其他信息,我们给出了没有无限风险利润且拥有有限风险属性的标准,并描述了最佳套利策略,并证明内部人面临的效用最大化问题的对偶结果。提供了满足NUPBR但又承认套利机会的市场的示例。对于G是连续随机变量的情况,我们考虑了第一类无渐进套利(NAA1)的概念,并在NAA1失败时给出了无穷利润的明确构造。

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