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arXiv 1407.0948q-fin.MFmath.PR
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不确定离散时间市场中的泛套利聚合器

Universal Arbitrage Aggregator in Discrete Time Markets under Uncertainty

Matteo Burzoni, Marco Frittelli, Marco Maggis

摘要:

在一个独立于模型的离散时间金融市场中,我们讨论了鞅测度族的丰富性与不同的套利概念之间的关系,它是由一类重要集合$\mathcal{S}$产生的,我们称之为类套利$\mathcal{S}$ . $\mathcal{S}$的选择反映了鞅测度的极集类的内在性质。特别是:对于S= $Ω$,不存在模型独立套利等价于存在鞅测度;对于$\mathcal{S}$是开集,不存在开放套利等价于存在完全支持鞅测度。这些结果是通过采用技术过滤放大和构建一个通用的聚合器的所有套利机会。我们进一步引入市场可行性的概念,并通过套利条件提供其特征。我们得出结论,提供了一个双重表示的开放式套利弱开放集的概率措施,这突出了这个概念的鲁棒性。

英文摘要:

In a model independent discrete time financial market, we discuss the richness of the family of martingale measures in relation to different notions of Arbitrage, generated by a class $\mathcal{S}$ of significant sets, which we call Arbitrage de la classe $\mathcal{S}$. The choice of $\mathcal{S}$ reflects into the intrinsic properties of the class of polar sets of martingale measures. In particular: for S=$Ω$ absence of Model Independent Arbitrage is equivalent to the existence of a martingale measure; for $\mathcal{S}$ being the open sets, absence of Open Arbitrage is equivalent to the existence of full support martingale measures. These results are obtained by adopting a technical filtration enlargement and by constructing a universal aggregator of all arbitrage opportunities. We further introduce the notion of market feasibility and provide its characterization via arbitrage conditions. We conclude providing a dual representation of Open Arbitrage in terms of weakly open sets of probability measures, which highlights the robust nature of this concept.

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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