Banks and government bonds: A love story

European banks have been criticised for holding too much domestic government debt during the recent euro area crisis, intensifying the doom loop between sovereign and bank credit risks. This column deviates from previous research that focused on 'bad' reasons for holding sovereign debt, and points to a 'good' reason: an informational advantage that particular banks have regarding sovereigns. This seems to have had a role in the fragmentation of European government bond markets.