The euro struggled to hold above eight-month lows against the dollar on Friday, hurt by a dive in Germany's Ifo survey of business sentiment heading in to the end of the U.S. currency's strongest week since March.
The Ifo numbers, the most watched forward-looking indicator of growth in the euro zone's largest member economy, fell for the third month running, both of its main indexes falling much more than forecast.
The euro fell to near $1.34 in response, within touching distance of Thursday's eight-month lows around $1.3438.
Leading banks have been forecasting a decisive break higher by the dollar against the euro since early this year but have been frustrated by lukewarm U.S. data and yield-seeking investment flows into European stocks and bonds.
But U.S. economic numbers have finally shown some more consistency in the past couple of months and the slightest hints of a more hawkish tone from Federal Reserve chief Janet Yellen have proven triggers for a jerk higher in the currency. A number of analysts say that may be the start of something bigger, although there is still caution out there.