Dynamical Clustering of Exchange Rates

Details Dynamical Clustering of Exchange Rates Dynamical Clustering of Exchange Rates

2009-05-29

arxiv.org/abs/0905.4912v2

Economy

Quantitative Finance

Trading and Market Microstructure

31 pages, 19 figures (some with multiple parts). Section added in v2.

Scientific paper

We use techniques from network science to study correlations in the foreign exchange (FX) market over the period 1991--2008. We consider an FX market network in which each node represents an exchange rate and each weighted edge represents a time-dependent correlation between the rates. To provide insights into the clustering of the exchange rate time series, we investigate dynamic communities in the network. We show that there is a relationship between an exchange rate's functional role within the market and its position within its community and use a node-centric community analysis to track the time dynamics of this role. This reveals which exchange rates dominate the market at particular times and also identifies exchange rates that experienced significant changes in market role. We also use the community dynamics to uncover major structural changes that occurred in the FX market. Our techniques are general and will be similarly useful for investigating correlations in other markets.

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