Formation of tectonic wave networks: Dynamics of the Mexican payment system structure

The purpose of the present study is to analyze the network structure of the Mexican large value payment system (LVPS), SPEI, by accounting for all direct participants. We build the bilateral relationships of the financial institutions based on the aggregated amount of transactions performed on a daily basis. In particular, we look trough two different segments-one consisting of the institutions that have direct access to the liquidity provided by the Mexican Central Bank, and the other formed by the institutions that do not have such access. In order to determine the overall structure of the network, we identify different components and measure their connectivity. We term this structure `tectonic waves´ by analogy with structural geology. We observe that tectonic waves structure exhibits dynamic properties.