Bootstrapping High-Frequency Jump Tests
高频跳跃检验的自助法AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要以高频日内收益、已实现波动率及双幂变差为基础检验跳跃,直接涉及高频计量与波动率。
高频跳跃检验的自助法AI 解读 ↓
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The main contribution of this article is to propose a bootstrap test for jumps based on functions of realized volatility and bipower variation. Bootstrap intraday returns are randomly generated from a mean zero Gaussian distribution with a variance given by a local measure of integrated volatility (which we denote by {v^in}). We first discuss a set of high-level conditions on {v^in} such that any bootstrap test of this form has the correct asymptotic size and is alternative-consistent. We then provide a set of primitive conditions that justify the choice of a thresholding-based estimator for {v^in}. Our cumulant expansions show that the bootstrap is unable to mimic the higher-order bias of the test statistic. We propose a modification of the original bootstrap test which contains an appropriate bias correction term and for which second-order asymptotic refinements are obtained.