Trading in the U.S. index futures suggests that Wall Street stocks may open Friday’s session lower, continuing losses into the fifth straight session as investors fret over looming rate hikes and geopolitical tensions. Global cues are mixed, with Asian stocks ending on a mixed note, while the European markets are also seeing mixed sentiment. Crude oil prices are pulling back, as geopolitical tensions ease. A domestic consumer sentiment reading could impact the market mood to some extent, although the still unsettled Greek debt crisis could serve as an overhang.