Bespoke realized volatility: Tailored measures of risk for volatility prediction
定制已实现波动率:面向波动率预测的风险度量AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要以高频数据构造已实现波动率,并服务于 HAR 和 GARCH-X 波动率预测。
定制已实现波动率:面向波动率预测的风险度量AI 解读 ↓
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Standard realized volatility (RV) measures estimate the latent volatility of an asset price using high frequency data with no reference to how or where the estimate will subsequently be used. This paper presents methods for “tailoring” the estimate of volatility to the application in which it will be used. For example, if the volatility measure will be used in a specific parametric forecasting model, it may be possible to exploit that knowledge to construct a better measure of volatility. We use methods from machine learning to estimate optimal “bespoke” RVs for heterogeneous autoregressive (HAR) and GARCH-X forecasting applications. We apply the methods to 886 U.S. stock returns and find that bespoke RVs significantly improve out-of-sample forecast performance. We find that, across a variety of volatility models, the bespoke RV places more weight on data from the end of the trade day, and that the optimal bespoke weights can be well-approximated by a simple parametric function.