Estimating option pricing models using a characteristic function-based linear state space representation
利用特征函数线性状态空间表示估计期权定价模型AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要明确以仿射跳跃扩散期权定价模型和标普 500 期权价格为对象,核心是定价模型的状态过滤与参数估计。
利用特征函数线性状态空间表示估计期权定价模型AI 解读 ↓
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We develop a novel filtering and estimation procedure for parametric option pricing models driven by general affine jump-diffusions. Our procedure is based on the comparison between an option-implied, model-free representation of the conditional log-characteristic function and the model-implied conditional log-characteristic function, which is functionally affine in the model's state vector. We formally derive an associated linear state space representation and the asymptotic properties of the corresponding measurement errors. The state space representation allows us to use a suitably modified Kalman filtering technique to learn about the latent state vector and a quasi-maximum likelihood estimator of the model parameters, for which we establish asymptotic inference results. Accordingly, the filtering and estimation procedure brings important computational advantages. We analyze the finite-sample behavior of our procedure in Monte Carlo simulations. The applicability of our procedure is illustrated in two case studies that analyze S&P 500 option prices and the impact of exogenous state variables capturing Covid-19 reproduction and economic policy uncertainty.