U.S. stock index futures edged higher Tuesday, after the Dow and S&P 500 logged their first four-day losing streaks this year, but ongoing anxiety about a possible imminent scaling back of the Federal Reserve's massive stimulus program roiled markets worldwide.
As global markets took their cue from Wall Street's losing streak, which extended into a fourth straight session on Monday -- its longest downward trend so far this year -- stock futures pointed higher as surging Treasury yields appeared to stabilize in early dealings.