On the number of common factors with high-frequency data
高频数据中的共同因子数量AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要明确使用高频数据估计连续时间模型的共同因子数,允许载荷时变,并分析金融数据,直接对应金融因子与高频计量。
高频数据中的共同因子数量AI 解读 ↓
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In this paper, we introduce a local principal component analysis approach to determining the number of common factors of a continuous-time factor model with time-varying factor loadings using high-frequency data. The model is approximated locally on shrinking blocks using discrete-time factor models. The number of common factors is estimated by minimizing the penalized aggregated mean squared residual error over all shrinking blocks. While the local mean squared residual error on each block converges at rate |$\min(n^{1/4}, p)$|, where |$n$| is the sample size and |$p$| is the dimension, the aggregated mean squared residual error converges at rate |$\min(n^{1/2}, p)$|; this achieves the convergence rate of the penalized criterion function of the global principal component analysis method, assuming restrictive constant factor loading. An estimator of the number of factors based on the local principal component analysis is consistent. Simulation results justify the performance of our estimator. A real financial dataset is analysed.