Foreign holders of €422bn of Greek debt were warned to brace themselves for "killer losses" as coalition talks in Athens collapsed, threatening Greece's future in the eurozone. The euro tumbled to a four-month low and European stock markets dropped as political leaders and economists warned that the next round of elections called in Athens amounted to a vote on Greek membership of the euro “What’s at stake isn’t just the next Greek government,” said Guido Westerwelle, Germany’s foreign minister. “What’s at stake is the Greek people’s commitment to Europe and the euro.” “A second vote means Greece is edging closer...