Deutsche Boerse, the German stock exchange operator, experienced a short disruption on its Xetra trading platform early on Wednesday, but trading started as normal at 0800 GMT.
Deutsche Boerse was not immediately available to explain the disruption, which surfaced around 0715 GMT with a notice on its website. That notice was removed about 30 minutes later.
Such short-lived disruptions occur from time to time. Wednesday's difficulty did not spill over into the start of normal trade. The DAX index of 30 major companies opened down 0.3 percent.