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arXiv 1606.00530q-fin.PR
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广义3/2和1/2模型下的美式VIX期权

On American VIX options under the generalized 3/2 and 1/2 models

Jerome Detemple, Yerkin Kitapbayev

摘要:

本文推广了Goard和Mazur(2013)研究的波动率指数的3/2模型,并引入了广义3/2和1/2波动率过程类。在这些模型下,我们研究了欧洲和美国的VIX期权的定价,对于后者,我们得到了一个提前行使溢价表示使用自由边界的方法和当地的时空演算。波动率的最优执行边界作为Volterra型积分方程的唯一解得到。我们还考虑了一个混合这两类的模型,并制定相应的最优停时问题的观察因子过程。美国波动率指数看涨期权的价格由提前行使溢价公式表示。我们证明了因子过程的一对最优运动边界的存在性,并将其描述为积分方程系统的唯一解。

英文摘要:

In this paper, we extend the 3/2-model for VIX studied by Goard and Mazur (2013) and introduce the generalized 3/2 and 1/2 classes of volatility processes. Under these models, we study the pricing of European and American VIX options and, for the latter, we obtain an early exercise premium representation using a free-boundary approach and local time-space calculus. The optimal exercise boundary for the volatility is obtained as the unique solution to an integral equation of Volterra type. We also consider a model mixing these two classes and formulate the corresponding optimal stopping problem in terms of the observed factor process. The price of an American VIX call is then represented by an early exercise premium formula. We show the existence of a pair of optimal exercise boundaries for the factor process and characterize them as the unique solution to a system of integral equations.

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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