We investigate the interdependence of the default risk of several Eurozone countries (France, Germany, Italy, Ireland, the Netherlands, Portugal, and Spain) and their domestic banks during the period between June 2007 and May 2010, using daily credit default swaps (CDS). Bank bailout programs changed the composition of both banks’ and sovereign balance sheets and, moreover, affected the linkage between the default risk of governments and their local banks. Our main findings suggest that in the period before bank bailouts the contagion disperses from bank credit spreads into the sovereign CDS market. After bailouts, a financial sector shock affects sovereign CDS spreads more strongly in the short run. However, the impact becomes insignificant in the long term. Furthermore, government CDS spreads become an important determinant of banks’ CDS series. The interdependence of government and bank credit risk is heterogeneous across countries, but homogeneous within the same country.

In this paper we modify and extend the framework of Diebold and Yilmaz (2011) to quantify spillovers between sovereign credit markets and banks in the euro area. Spillovers are estimated recursively from a vector autoregressive model of daily changes in credit default swap (CDS) spreads with exogenous common factors. We account for interdependencies between sovereign and bank CDS spreads and derive generalized impulse response functions. Specifically, we assess the systemic effect of an unexpected shock to the creditworthiness of a sovereign or country-specific bank index on other sovereigns and bank CDSs between October 2009 and July 2012. Channels of shock transmission from or to sovereigns and banks are summarized in a Contagion Index and its four components: (i) among sovereigns, (ii) among banks, (iii) from sovereigns to banks, and (iv) from banks to sovereigns. We also highlight the impact of policy-related events on the Contagion Index.