When it comes to investing, the conventional wisdom is to buy-and-hold a balanced portfolio of stocks and bonds. However, following the major bear markets that resulted from the popping of the tech and housing bubbles, many investors either questioned the validity of this advice or abandoned the discipline required to follow this strategy. As a result, many surrendered to the emotions of the market, sold at the wrong time, and underperformed. These stock market corrections have left many wonderi...