Survey finds that increasing uncertainty over financial future of Greece weighing on eurozone

A closely watched survey shows uncertainty over the financial future of Greece is weighing on the eurozone economy.

Financial information company Markit says Wednesday that concerns over Greece are acting as "a brake on growth." Markit says its purchasing managers' index — a broad gauge of business activity — for May fell to a 3-month low of 53.6 points from 53.9 the month before.

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Greek Prime Minister Alexis Tsipras is due in Brussels later to discuss proposals to end the protracted talks over the country's bailout. Without a deal that would release remaining bailout funds, Greece faces bankruptcy and a possible exit from the euro, a development that could roil the 19-country eurozone.

Markit's chief economist Chris Williamson says "any escalation of the Greek crisis could rapidly derail the recovery."