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A Unified Stochastic Volatility—Stochastic Correlation Model

机译:统一随机挥发性 - 随机相关模型

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This paper has two main contributions. First, we build a simple but rigorous stochastic volatility—stochastic correlation model. Mean-reverting and locally stochastic with dependent Brownian motions, our model proves to fit both marginal and joint distributions of the option market implied volatility and correlation. Second, asset correlations are currently modeled exogenously and then ad hoc assigned to an asset price process such as the Geometric Brownian Motion (GBM). This is conceptually and mathematically unsatisfying. We apply our approach to build a unified asset price—asset correlation model, which outperforms the standard GBM significantly.
机译:本文有两个主要贡献。首先,我们建立一个简单但严谨的随机波动性 - 随机相关模型。平均恢复和局部随机与依赖布朗运动,我们的模式证明了符合期权市场暗示波动性和相关性的边缘和联合分布。其次,资产相关性目前外源建模,然后分配给资产价格过程,如几何布朗运动(GBM)。这是概念上和数学上的不满意。我们采用我们的方法来构建统一的资产价格 - 资产相关模型,其显着优于标准的GBM。

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