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arXiv 1004.3299math.PRq-fin.PR
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随机波动率模型的估值方程

Valuation equations for stochastic volatility models

Erhan Bayraktar, Constantinos Kardaras, Hao Xing

摘要:

本文在随机波动率模型的一般框架下分析了欧式未定权益的估值偏微分方程,其中扩散系数可能比线性增长更快,并在状态空间的边界上退化。我们允许各种类型的模型行为:在我们的模型中的波动率过程可能会达到零,要么停留在那里,要么瞬间反映,资产价格过程可能是一个严格的局部鞅。我们的主要结果是关于估值方程的经典解唯一性的一个充要条件:在至多线性增长的函数中,价值函数是估值方程的唯一非负经典解当且仅当资产价格是鞅.

英文摘要:

We analyze the valuation partial differential equation for European contingent claims in a general framework of stochastic volatility models where the diffusion coefficients may grow faster than linearly and degenerate on the boundaries of the state space. We allow for various types of model behavior: the volatility process in our model can potentially reach zero and either stay there or instantaneously reflect, and the asset-price process may be a strict local martingale. Our main result is a necessary and sufficient condition on the uniqueness of classical solutions to the valuation equation: the value function is the unique nonnegative classical solution to the valuation equation among functions with at most linear growth if and only if the asset-price is a martingale.

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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