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Dynamic no-good-deal pricing measures and extension theorems for linear operators on L~∞

机译:L〜∞上线性算子的动态不良交易定价方法和扩展定理

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摘要

In an L ~∞-framework, we present majorant-preserving and sandwich-preserving extension theorems for linear operators. These results are then applied to price systems derived by a reasonable restriction of the class of applicable equivalent martingale measures. Our results prove the existence of a no-good-deal pricing measure for price systems consistent with bounds on the Sharpe ratio. We treat both discrete- and continuous-time market models. Within this study we present definitions of no-good-deal pricing measures that are equivalent to the existing ones and extend them to discrete-time models. We introduce the corresponding version of dynamic no-good-deal pricing measures in the continuous-time setting.
机译:在L〜∞框架中,我们给出了线性算子的守恒保持和三明治保持扩展定理。然后,将这些结果应用于通过合理限制适用的等效mar测度类别而得出的价格系统。我们的结果证明,存在与Sharpe比率的界限一致的价格体系的不良交易定价措施。我们同时处理离散时间和连续时间市场模型。在这项研究中,我们提出了与现有交易方法等效的无效交易定价方法的定义,并将其扩展到离散时间模型。我们在连续时间设置中引入了相应版本的动态不交易价格测度。

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