U.S. stock index futures edged higher on Friday, recovering slightly from the previous session's losses as investors awaited Federal Reserve Chair Jerome Powell's address at the Jackson Hole Symposium for clues on the interest-rate path.

Stock-index futures are pointing to a higher start Friday, following five straight days of losses for the S&P 500. "After spending the week on the back foot in anticipation of Fed Chair Jerome Powell delivering a forceful message on inflation in his Jackson Hole speech today,