Credit default swaps are financial contracts that transfer the credit risk of a borrower from one party to another. During crises, they affect banks’ ability to raise money because they change market perceptions of default risk, increase counterparty exposures, and trigger collateral and margin demands that tighten liquidity.
Mechanisms during crises
Market signals from rising CDS spreads often precede deteriorations in bond markets. Darrell Duffie, Stanford University, has written about how over-the-counter derivatives create interconnected exposures that amplify counterparty fears. As CDS spreads widen, lenders and institutional counterparties treat the bank as riskier, demanding higher interest rates or requiring additional collateral. That raises a bank’s funding costs directly for new borrowing and indirectly by reducing access to unsecured interbank funding. Markus Brunnermeier, Princeton University, explains how these dynamics feed into a liquidity spiral: falling asset prices force more selling and margin calls, which further increases CDS spreads and funding pressures.
Consequences for lending and contagion
Higher funding costs reduce banks’ willingness to extend credit, particularly to small businesses and households with thinner relationships to large lenders. The Bank for International Settlements has documented how derivative-market stress can transmit rapidly across borders, turning a localized funding squeeze into a regional or global contraction in credit. The International Monetary Fund has also analyzed how CDS on sovereigns and banks can amplify perceived fiscal or solvency problems, producing feedback loops between sovereign and banking sectors that harm employment and public services in affected territories.
Regulatory and market responses matter for outcomes. Central clearing and greater transparency reduce bilateral counterparty uncertainty and can lower risk premia, a point emphasized in research on post-crisis reforms. However, nuance matters: in emerging markets, limited access to liquid collateral and shallower CDS markets mean funding shocks can force deeper real-economy contractions than in advanced economies. Cultural and political factors influence whether authorities intervene quickly to support liquidity or allow market pricing to proceed, shaping recovery paths for communities dependent on bank credit.