Analysts think that this has been caused by an increasing willingness of governments of important countries to invest into stimuli of their economies. Most notably, there have been indications that the German government is thinking of abandoning its balanced budget policy in favor of investments into the German economy.
This is particularly interesting, because budgetary zeal has long been the staple of German policy and such talk would have been unthinkable only a few years ago. However, enduring criticism of German handling of the eurozone crisis coupled with an increasingly bleak outlook seems to have had an effect.
Dollar has been slowly, but steadily increasing in value from the beginning of 2018, when 1 dollar was worth just 0,8 euro. This was a rapid drop from just a year before, when there was almost parity between dollar and euro.