At the height of the European sovereign debt crisis, the European Central Bank decided to purchase distressed European government bonds. Even worse, and more importantly, the ECB is providing direct support of several hundred billions of euros to troubled banks via its normal monetary policy...

Applying a t-DCC-GARCH model to daily spread data, four phases of interaction in euro area sovereign bond markets are identified between January 2008 and June 2013. The initial period (January-October 2008) is followed by a general rise in pairwise correlation values between November 2008 and...