He said the size of the bond purchases would be published weekly. A breakdown by country will take place monthly.
The ECB will have the same status as other creditors for the bonds it buys. That means that if a country defaults on those bonds, it would take losses as well. The decision is meant to not scare investors away from the bonds the ECB buys.
Mr Draghi said the ECB can stop the purchases if a country does not comply with policy conditions.