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European Central Bank chief Mario Draghi (L) talks during the Committee on Economic and Monetary Affairs at the EU headquarters in Brussels on June 21, 2016.
Draghi said on June 21 the ECB is prepared for all eventualities regarding the British EU referendum later this week, but the economic impact of the vote is difficult to predict. / AFP / JOHN THYS (Photo credit should read JOHN THYS/AFP/Getty Images)