When Moving‐Average Models Meet High‐Frequency Data: Uniform Inference on Volatility
移动平均模型与高频数据:波动率的一致有效推断AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要直接研究含噪声的高频交易价格,并以连续时间价格过程的二次变差定义和估计波动率,对应高频计量与波动率。
移动平均模型与高频数据:波动率的一致有效推断AI 解读 ↓
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We conduct inference on volatility with noisy high‐frequency data. We assume the observed transaction price follows a continuous‐time Itô‐semimartingale, contaminated by a discrete‐time moving‐average noise process associated with the arrival of trades. We estimate volatility, defined as the quadratic variation of the semimartingale, by maximizing the likelihood of a misspecified moving‐average model, with its order selected based on an information criterion. Our inference is uniformly valid over a large class of noise processes whose magnitude and dependence structure vary with sample size. We show that the convergence rate of our estimator dominates n 1/4 as noise vanishes, and is determined by the selected order of noise dependence when noise is sufficiently small. Our implementation guarantees positive estimates in finite samples.