Systemic risk spreads rapidly through the interconnected web of counterparty lending agreements that define the interbank market. Stability teams use advanced Network Topology models to map these interdependencies.
Mapping the Interbank Adjacency Matrix
Risk teams use adjacency matrices to track credit exposures and locate systemic hubs across the interbank market:
  Network Structure Node |   Counterparty Asset Connection  |   Contagion Default Risk Profile
-------------------------+----------------------------------+-----------------------------------------
  Dispersed Network      | Evenly distributed asset claims  | Low contagion risk; high risk absorption
  Core-Periphery Hub     | Highly concentrated central SIFIs| High systemic risk; central hub failure triggers system gridlock

A core-periphery structure concentrates credit linkages within a small cluster of dominant institutions. While this structure clears transactions efficiently during normal market conditions, a failure at a central hub can trigger a cascading domino effect of defaults across the periphery network.
 
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