RomoloTavani The two best publicly traded business development companies based on long-term total return performance are Capital Southwest (CSWC) and Main Street Capital (MAIN). As you can see in the chart below, they have both generated enormous long-term total returns that completely leave the S&P 500 (SPY) and the broader BDC sector (BIZD) in the dust. Data by YCharts We previously discussed CSWC's strengths here and MAIN's strengths here. In this article, we will discuss what makes them such effective l ...