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Empirical Analysis of Affine Versus Nonaffine Variance Specifications in Jump-Diffusion Models for Equity Indices

机译:股票指数跳跃扩散模型中仿射与非仿射方差指标的实证分析

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摘要

This article investigates several crucial issues that arise when modeling equity returns with stochastic variance. (ⅰ) Does the model need to include jumps even when using a nonaffine variance specification? We find that jump models clearly outperform pure stochastic volatility models. (ⅱ) How do affine variance specifications perform when compared to nonaffine models in a jump diffusion setup? We find that nonaffine specifications outperform affine models, even after including jumps.
机译:本文研究在对具有随机方差的股权收益进行建模时出现的几个关键问题。 (ⅰ)即使使用非仿射方差规范,模型是否也需要包括跳跃?我们发现跳跃模型明显优于纯随机波动率模型。 (ⅱ)与跳跃扩散设置中的非仿射模型相比,仿射方差规范如何执行?我们发现,即使包含跳转,非仿射规格也优于仿射模型。

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