The future of the euro may be determined in the coming weeks, asGreek voters decide whether to honor the country's internationalbailout and create a first test for Spain's newly built 100billion-euro ($125 billion) banking firewall.

With Greece going to the polls in six days, the most recentsurveys showed the main party opposing the terms of its bailoutvying for first place. The government in Athens has “a few weeks”before exhausting its funds, making this is “a make-or-breakperiod,” former Greek Prime Minister George Papandreou toldBloomberg Television in a June 8 interview.

The European debt crisis, now in its third year, reached a newmilestone after Spain abandoned unilateral attempts to rescue itsbanks and became the fourth country in the 17-member currency unionto seek an emergency bailout. The aid blueprint hammered out in anemergency conference call among euro finance chiefs two days ago isdesigned to create a line of defense if the Greek vote unleashes anew bout of market turmoil.