The Russell 2000 Index comprises primarily small-cap stocks, with some mid-cap stocks included prior to its annual reconstitution on June 28.The Russell 2000 is a great index for finding smaller companies that could become strong portfolio additions for investors. It is also a metric used by many investors to gauge the overall performance of the small-cap market.Below, I discuss three stocks included in the Russell 2000 Index that have performed remarkably well over this past year, particularly in terms of  ...