The global financial system has become highly connected and complex. Has been
proven in practice that existing models, measures and reports of financial risk
fail to capture some important systemic dimensions. Only lately, advisory
boards have been established in high level and regulations are directly
targeted to systemic risk. In the same direction, a growing number of
researchers employ network analysis to model systemic risk in financial
networks. Current approaches are concentrated on interbank payment network
flows in national and international level.