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 Navigating Retirement Pitfalls Why are they made again and again? Making sense of these errors in judgement. Conquering Retirement Challenges for Women Looking ahead can help you conquer these unique obstacles. Layers of Protection Take these five steps to protect your financial well-being before making any other changes.