Relative strength focuses on stocks that have performed well compared to the market or another relevant benchmark. By targeting those displaying outperformance, investors can participate in positive market momentum. Recently, several Zacks top-ranked stocks have shown precisely that. Abercrombie & Fitch (ANF) , Sunoco (SUN) , and Duolingo (DUOL) have all enjoyed positive price action over the last month, as we can see illustrated below. Image Source: Zacks Investment Research But what’s driving the outperfo ...