The Price Impact of Order Book Events

Abstract : 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 seasonality effects, and stable across time scales and across stocks. We argue that this linear price impact model, together with a scaling argument, implies the empirically observed "square-root" relation between price changes and trading volume. However, the relation between price changes and trade volume is found to be noisy and less robust than the one based on order flow imbalance.
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https://hal.archives-ouvertes.fr/hal-00545745
Contributeur : Rama Cont <>
Soumis le : samedi 11 décembre 2010 - 22:37:31
Dernière modification le : jeudi 27 avril 2017 - 09:45:59

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  • HAL Id : hal-00545745, version 1
  • ARXIV : 1011.6402

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UPMC | USPC | PMA

Citation

Rama Cont, Arseniy Kukanov, Sasha Stoikov. The Price Impact of Order Book Events. 2010. <hal-00545745>

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