Informed Trading and the Price Impact of Block Trades: A High Frequency Trading Analysis
50 Pages Posted: 25 Nov 2014 Last revised: 31 Jul 2016
Date Written: July 29, 2016
Using high frequency data from the London Stock Exchange (LSE), we investigate the relationship between informed trading and the price impact of block trades on intraday and inter-day basis. Price impact of block trades is stronger during the first hour of trading; this is consistent with the hypothesis that information accumulates overnight during non-trading hours. Furthermore, private information is gradually incorporated into prices despite heightened trading frequency. Evidence suggests that informed traders exploit superior information across trading days, and stocks with lower transparency exhibit stronger information diffusion effects when traded in blocks, thus informed block trading facilitates price discovery.
Keywords: Informed trading, Block trades, Transparency, Opacity, Price impact, Price discovery
JEL Classification: G12, G14
Suggested Citation: Suggested Citation