Some once great companies have fallen on hard times, causing their stock to sink. While surprising, the long-term decline of powerful brands is nothing new. Business history is littered with discarded companies that were once dominant but became irrelevant value traps over time. Many great companies cease to exist and become top blue-chip stocks to sell. Think of names such as Eastman Kodak (NYSE:KODK), Compaq Computer and F.W. Woolworth. It’s important for investors to recognize when the company behind a s ...