Local Predictability in High Dimensions
高维环境下的局部可预测性AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要明确提出时间序列密度预测方法,并应用于季度通胀与日度股票收益预测。
高维环境下的局部可预测性AI 解读 ↓
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We propose a time series forecasting method designed to effectively handle large sets of predictive signals, many of which may be irrelevant or short-lived over time. Our method transforms predictive signals into candidate density forecasts via time-varying coefficient models, and subsequently combines them into an aggregate density forecast via time-varying subset combination. The approach is computationally efficient because it uses online prediction and updating. Through extensive simulation analysis, we find that our approach outperforms competitive benchmark methods in terms of forecast accuracy and computing time. We further demonstrate the capabilities of our method in applications to forecasting aggregate daily stock returns and quarterly inflation.