Thomas Barwick/DigitalVision via Getty Images Over the years, I have found that patience is incredibly important when it comes to investing. This is especially true during difficult times. Rarely can you expect to generate strong upside immediately after buying shares of a business. But during the time in which subpar performance reigns supreme, the psychological toll that it can take can be difficult to deal with. A good example of a firm that has woefully underperformed my expectations but that I stil ...