Rise of the Machines: Algorithmic Trading in the Foreign Exchange Market

Alain P. Chaboud, Benjamin Chiquoine, Erik Hjalmarsson and Clara Vega

Journal of Finance, 2014, vol. 69, issue 5, 2045-2084

Abstract: type="main">

We study the impact of algorithmic trading (AT) in the foreign exchange market using a long time series of high-frequency data that identify computer-generated trading activity. We find that AT causes an improvement in two measures of price efficiency: the frequency of triangular arbitrage opportunities and the autocorrelation of high-frequency returns. We show that the reduction in arbitrage opportunities is associated primarily with computers taking liquidity. This result is consistent with the view that AT improves informational efficiency by speeding up price discovery, but that it may also impose higher adverse selection costs on slower traders. In contrast, the reduction in the autocorrelation of returns owes more to the algorithmic provision of liquidity. We also find evidence consistent with the strategies of algorithmic traders being highly correlated. This correlation, however, does not appear to cause a degradation in market quality, at least not on average.

Date: 2014
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Working Paper: Rise of the machines: algorithmic trading in the foreign exchange market (2009)
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