Towards a Network Description of Interbank Payment Flows
AbstractWe present the application of network theory to the Dutch payment system with specific attention to systemic stability. The network nodes comprise of domestic banks, large international banks and TARGET countries, the links are established by payments between the nodes. Traditional measures (transactions, values) first show payments are relatively well behaved through time and that the system does not contain a group of significant structural net receivers or payers among the participant institutions. Structural circular flows do, however, exist in the system, most prominently a large circular net flow between TARGET countries. Analysis of the properties of prominent network measures over time shows that fast network development takes place in the early phase of network formation of about one hour and slower development afterwards. The payment network is small (in actual nodes and links), compact (in path length and eccentricity) and sparse (in connectivity) for all time periods. In the long run, a mere 12% of the possible number of interbank connections is ever used and banks are on average only 2 steps apart. Relations in the network tend to be reciprocal. Our results also indicate that the network is susceptible to directed attacks. In a final section we show that the recent 'sub prime' turmoil in credit markets has not materially affected the network structure.
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Bibliographic InfoPaper provided by Netherlands Central Bank, Research Department in its series DNB Working Papers with number 177.
Date of creation: May 2008
Date of revision:
network; topology; interbank; payment; systemic risk; financial stability;
Find related papers by JEL classification:
- G1 - Financial Economics - - General Financial Markets
- E5 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit
This paper has been announced in the following NEP Reports:
- NEP-ALL-2008-06-07 (All new papers)
- NEP-BAN-2008-06-07 (Banking)
- NEP-NET-2008-06-07 (Network Economics)
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