Incorporating overnight and intraday returns into multivariate GARCH volatility models
将隔夜与日内收益纳入多元 GARCH 波动率模型AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要明确使用五分钟高频收益及隔夜收益,构造多元 GARCH 并预测周度波动率。
将隔夜与日内收益纳入多元 GARCH 波动率模型AI 解读 ↓
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We propose and evaluate mixed-frequency multivariate GARCH models for forecasting low-frequency (weekly) volatility based on high-frequency intraday returns (at 5-minute intervals) and on the overnight returns. The low-frequency conditional volatility matrix is modeled as a weighted sum of an intraday and an overnight component. The components are specified as multivariate GARCH processes of the BEKK type, adapted to the mixed-frequency data setting, and may enter the model as two separate components or as a single one. The models may further be extended by a nonparametrically estimated slowly-varying long-run volatility matrix. We evaluate the models in and out of sample using the 5-minute and overnight returns on four DJIA stocks (AXP, GE, HD, and IBM) from January 1988 to November 2014 and find that they systematically dominate a variety of models that only use lower-frequency data (weekly, daily, or close-to-open and open-to-close returns).