Impact of jumps on returns and realised variances: econometric analysis of time-deformed Lévy processes
跳跃对收益与已实现方差的影响:时间变换 Lévy 过程的计量分析AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要直接研究收益跳跃、已实现方差及其波动测量与预测含义。
反馈分类问题跳跃对收益与已实现方差的影响:时间变换 Lévy 过程的计量分析AI 解读 ↓
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In order to assess the effect of jumps on realised variance calculations, we study some of the econometric properties of time-changed Lévy processes. We show that in general realised variance is an inconsistent estimator of the time-change, however we can derive the second order properties of realised variances and use these to estimate the parameters of such models. Our analytic results give a first indication of the degrees of inconsistency of realised variance as an estimator of the time-change in the non-Brownian case. Further, our results suggest volatility is even more predictable than has been shown by the recent econometric work on realised variance.
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