Comment on: Price Discovery in High Resolution
13 Pages Posted: 6 Mar 2019 Last revised: 12 Mar 2019
Date Written: February 15, 2019
This note is commenting on Hasbrouck (2018). The paper investigates the problem of price discovery on markets with trades recorded at sub-millisecond frequencies. The application of the popular information share measure of Hasbrouck (1995) to such data faces several difficulties, as the underlying VECM would need a huge number of lags to capture dynamics at different time-scales. The problem is handled by imposing a set of restrictions on parameters inspired by the Heterogeneous Autoregressive model for realized volatility. We illustrate some potential drawbacks of the information share measure adopted in the paper and propose a modelling strategy aimed at dealing with such limitations. In particular, we introduce a structural multi-market model with a lagged adjustment mechanism describing lagged absorption of information across markets. The advantages of the method are shown in simulations.
Keywords: High-resolution, High-frequency trading, Information share, HAR, Lagged-adjustment
JEL Classification: C32, D58, G14
Suggested Citation: Suggested Citation