The trading halt for Voxeljet AG (VJET) is a precautionary measure taken when significant news is expected to be released. This news could be either positive or negative, but its significance is such that it warrants a temporary pause in trading to ensure a fair and orderly market once the news is public. The impact on the stock price will depend on the nature of the news. Given the lack of details on the news content, a neutral score is assigned, but the relevance and importance are rated highly due to the direct impact on trading activities.