Demand for nations first zero-coupon issue reflects safe-haven buying.

Lackluster results of Spanish debt auction also hit Italian, Greek bonds.

Lackluster results of Spanish debt auction also hit Italian, Greek bonds.

Portuguese debt suggests Greek restructuring not unique.

Portuguese debt suggests Greek restructuring not unique.

Greek debt crisis, concerns about growth dampen currency

Greek debt crisis, concerns about growth dampen currency

Central bank must back up debt purchases to stave off speculators.