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arXiv 2102.13574q-fin.MFmath.PR
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第二基本资产定价定理在离散时间下的条件版本

A conditional version of the second fundamental theorem of asset pricing in discrete time

Lars Niemann, Thorsten Schmidt

AI总结:

本文在离散时间金融市场中,基于条件信息推导出第二基本资产定价定理的条件版本,利用动态非线性期望的时间一致性刻画无套利价格、可达性与市场完备性,扩展了现有结果。

摘要:

我们考虑一个离散时间的金融市场,并研究在任意时间点之前可获取信息条件下的定价与对冲。在此条件框架下,我们确定了无套利价格的结构。此外,我们刻画了可达性与市场完备性。我们推导出第二基本资产定价定理的条件版本,令人惊讶的是,该版本至今尚未可得。我们使用的主要工具是动态非线性期望的时间一致性性质,并将其应用于上对冲和下对冲价格。所得结果扩展了文献中已有的结果,其中条件设置在大多数情况下仅在有限概率空间上被考虑。

英文摘要:

We consider a financial market in discrete time and study pricing and hedging conditional on the information available up to an arbitrary point in time. In this conditional framework, we determine the structure of arbitrage-free prices. Moreover, we characterize attainability and market completeness. We derive a conditional version of the second fundamental theorem of asset pricing, which, surprisingly, is not available up to now. The main tool we use are time consistency properties of dynamic nonlinear expectations, which we apply to the super- and subhedging prices. The results obtained extend existing results in the literature, where the conditional setting is considered in most cases only on finite probability spaces.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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