Kevin Dietsch/Getty ImagesUS stocks staged a sharp rebound on Friday, snapping a three-day streak of losses.Encouraging inflation data stoked optimism that the Federal Reserve can cut interest rates in September.The rotation into small-caps continued, with the Russell 2000 rising more than 1.5%.US stocks rebounded Friday, helping reverse a streak of losses that dominated most of this week.With investor confidence starting to waver in the tech-stock bull run, rotations out of the mega-cap sector sent indexes on a three-day decline.