Model-free approaches to discern non-stationary microstructure noise and time-varying liquidity in high-frequency data
识别高频数据中非平稳微观结构噪声与时变流动性的无模型方法
In this paper, we provide non-parametric statistical tools to test stationarity of microstructure noise in general hidden Itô semimartingales, and discuss how to measure liquidity risk using high-frequency financial data. In particular, we investigate the impact of non-stationary microstructure noise on some volatility estimators, and design three complementary tests by exploiting edge effects, information aggregation of local estimates and high-frequency asymptotic…