While there have been winners in several corners of the small-cap space, Turtle Beach Corporation HEAR has climbed the most with more than 1000% gains. Click to get this free report Twitter, Inc. (TWTR): Free Stock Analysis Report Turtle Beach Corporation (HEAR): Free Stock Analysis Report First BanCorp. While a combination of factors like solid earnings, upbeat economic data and new tax legislation have fueled the rally, inflation fears, surge in yields, tech selloff, and most specifically tariff tantrums continue to weigh on stock returns.