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. Related Content The Business Cycle Understanding the economy's cycles can help put current business conditions in better perspective. Disability and Your Finances In the event of an unforeseen accident or illness, disability insurance may be a good way to protect your income and savings. Countering Counterfeit Currency Combating counterfeiting remains core to preserving the integrity of the nation’s money.