The Euro zone's currency has appreciated on Monday rebounding from its lowest rate comparing to the US Dollar since the beginning of the year. It was predicted by strategists that more pressure can be expected because of the suspense over Greece's future as a member the Euro zone and worries with respect to the region's banking system. The US Dollar index, which reveals currency's behaviour relative to its six major peers, erased earlier gains by dipping from 81.163 to 80.970 in North American market last Friday. The index on Friday has stopped a 14-day of successful series, the longest streak since the 1985, which had been provided largely by flight to safety amid rising uncertainty over the Euro zone.