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. Share | Related Content Understanding Dividends Find out the value working with a mutual company and how you may be entitled to an added benefit of an annual dividend. Contributing to an IRA? Determine if you are eligible to contribute to a traditional or Roth IRA. Estate Management Checklist Is your estate in order? This short quiz may help you assess your overall strategy.