In the FT (Alphaville), Marcello Minnena explains what type of currency denominations of Euro area sovereign debt constitute credit events; and how markets assess the risk of such denominations.
After the Greek default in 2012
new ISDA standards entered into force: contracts made since 2014 protect against euro area countries redenominating their debt into new national currencies [unless the debt is redenominated] into a reserve currency: the US dollar, the Canadian dollar, the British pound, the Japanese yen, or the Swiss franc. In all other cases, the only way to avoid the triggering of a credit event is if the switch to the new currency does not result in a loss for the investor: “no reduction in the rate or amount of interest, principal or premium payable”.
Since 2014 two types of sovereign CDS therefore coexist: the old (ISDA 2003) and the new (ISDA 2014). The latter has always traded at spreads wider than the CDS-2003, but the difference (the ISDA basis) has generally been small: 15-20 bps for Italy, 8-12 bps for Spain, 2-4 bps for France, and 1-2 bps for Germany.
Since January 2017, the spread difference for Italy and France has increased by roughly 20 basis points.