The Rule of 72 Want to be Smarter With Your Money? Join our mailing list and get news and info to support your financial goals. First Name Last Name Email Address Thank you! Oops! 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 Acres of Diamonds In life it often happens that the answers to our most pressing questions are right in our own backyards. Does Your Credit Score Affect Your Insurance Rates? Your credit score may influence how much you pay for auto and home insurance. How to Appeal Your Property Taxes For homeowners who think their property taxes are too high, there are ways to appeal.