This is CNBC's live blog covering European markets. European markets are heading for a negative open Wednesday as uncertainty over the direction of U.S. trade tariffs dents sentiment. The U.K.'s FTSE 100 index is expected to open 33 points lower at 8,217, Germany's DAX down 53 points at 21,174, France's CAC 53 points lower at 7,279 and Italy's FTSE MIB 168 points lower at 34,814, according to data from IG.