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Statistically validated lead-lag networks and inventory prediction in the foreign exchange market

Damien Challet (), R\'emy Chicheportiche, Mehdi Lallouache and Serge Kassibrakis

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Abstract: We introduce a method to infer lead-lag networks of agents' actions in complex systems. These networks open the way to both microscopic and macroscopic states prediction in such systems. We apply this method to trader-resolved data in the foreign exchange market. We show that these networks are remarkably persistent, which explains why and how order flow prediction is possible from trader-resolved data. In addition, if traders' actions depend on past prices, the evolution of the average price paid by traders may also be predictable. Using random forests, we verify that the predictability of both the sign of order flow and the direction of average transaction price is strong for retail investors at an hourly time scale, which is of great relevance to brokers and order matching engines. Finally, we argue that the existence of trader lead-lag networks explains in a self-referential way why a given trader becomes active, which is in line with the fact that most trading activity has an endogenous origin.

New Economics Papers: this item is included in nep-sog
Date: 2016-09, Revised 2018-07
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Working Paper: Statistically validated leadlag networks and inventory prediction in the foreign exchange market (2018)
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