Greece's possible exit from the euro area moved to the center of Europe's financial-crisis debate, rattling markets as authorities in Athens struggled to form a government.

Meetings brokered by Greek President Karolos Papoulias were set to continue today after Syriza, the leading anti-bailout party, rejected a unity government following inconclusive elections May 6. That moved the country closer to a new vote, with at least five European central bankers broaching the once-taboo topic of its exit from the euro.

“We're really getting to a denouement,” Michael O'Sullivan, head of portfolio strategy at Credit Suisse Private Banking, said today in a Bloomberg Television interview. “We're getting to the part where a decision has to be made” on whether Greece leaves the 17-nation currency union, he said.