Euro zone flash inflation data for May is due today, with the consensus being a 0.7% rise year-on-year. The numbers are expected to reinforce the case for a heavy monetary stimulus from the European Central Bank. Barclays (BCS), RBS (RBS) and JPMorgan (JPM) predict an annual inflation reading of 0.5%, far below the ECB's target of 2%. A softer reading will also boost the chances of the ECB loosening its policy towards negative deposit rates.