“…Using high-frequency data, several papers have also shown the role of macroeconomic news and rating announcements (see, e.g., Alfonso, Furceri and Gomez, 2011;Arezki, Candelon and Sy, 2011;Arru et al, 2012;De Santis, 2012;Gärtner and Griesbach, 2012). Others argued that the unexplained part of spreads dynamics could re ‡ect a new, systemic risk emerged since 2010: the risk of a euro break-up, that is, the risk that one or more countries might exit from the EMU and introduce new national currencies (see, e.g., Eichler, 2011;Hui and Chung, 2011;Di Cesare et al, 2012;Woo and Vamvakidis, 2012;Klose and Weigert, 2012;Favero, 2013).…”