VioletaStoimenova/E+ via Getty Images Overview Capital Southwest (NASDAQ:CSWC) is a financial company that lends to medium-sized businesses. It borrows a lower yield or issues equity to grow a portfolio of loans and equity investments. Capital Southwest earns money due to the spread between its yield when lending money and the yield on the debt it borrows. You can see in Figure 1 that in the last year has gained 40% in its stock price performance. It is impressive if you consider it is a high dividend secur ...