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The Price Impact of Order Book Events

Rama Cont

Imperial College London; CNRS; Norges Bank Research

Arseniy Kukanov

AQR Capital Management, LLC

Sasha Stoikov

Cornell Financial Engineering Manhattan

April 30, 2012

JOURNAL OF FINANCIAL ECONOMETRICS (Winter 2014) 12 (1): 47-88.

We study the price impact of order book events - limit orders, market orders and cancelations - using the NYSE TAQ data for 50 U.S. stocks. We show that, over short time intervals, price changes are mainly driven by the order flow imbalance, defined as the imbalance between supply and demand at the best bid and ask prices. Our study reveals a linear relation between order flow imbalance and price changes, with a slope inversely proportional to the market depth. These results are shown to be robust to intraday seasonality effects, and stable across time scales and across stocks. This linear price impact model, together with a scaling argument, implies the empirically observed "square-root" relation between the magnitude of price moves and trading volume. However, the latter relation is found to be noisy and less robust than the one based on order flow imbalance. We discuss a potential application of order flow imbalance as a measure of adverse selection in limit order executions, and demonstrate how it can be used to analyze intraday volatility dynamics.

Number of Pages in PDF File: 32

Keywords: limit order book, market microstructure, liquidity, price impact, trading volume, equity markets, eletronic markets, high frequency data

JEL Classification: C58, G12

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Date posted: November 28, 2010 ; Last revised: September 17, 2015

Suggested Citation

Cont, Rama and Kukanov, Arseniy and Stoikov, Sasha, The Price Impact of Order Book Events (April 30, 2012). JOURNAL OF FINANCIAL ECONOMETRICS (Winter 2014) 12 (1): 47-88.. Available at SSRN: https://ssrn.com/abstract=1712822 or http://dx.doi.org/10.2139/ssrn.1712822

Contact Information

Rama Cont (Contact Author)
Imperial College London ( email )
London, SW7 2AZ
United Kingdom
HOME PAGE: http://www3.imperial.ac.uk/people/r.cont
CNRS ( email )
Laboratoire de Probabilites & Modeles aleatoires
Universite Pierre & Marie Curie (Paris VI)
Paris, 75252
HOME PAGE: http://rama.cont.perso.math.cnrs.fr/
Norges Bank Research ( email )
P.O. Box 1179
Oslo, N-0107
Arseniy Kukanov
AQR Capital Management, LLC ( email )
Greenwich, CT
United States

Sasha Stoikov
Cornell Financial Engineering Manhattan ( email )
55 Broad street (3rd floor)
New York, NY New York 10005
United States
Feedback to SSRN

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