The Other Sure Thing Though we don't like to think about it, all of us will make an exit sometime. Are you prepared? Related Content How Stocks Work Understanding how a stock works is key to understanding your investments. The Rule of 72 Do you know how long it may take for your investments to double in value? The Rule of 72 is a quick way to figure it out. How to Retire Early Retiring early sounds like a dream come true, but it’s important to take a look at the cold, hard facts.