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. Share | Related Content The Business Cycle How will you weather the ups and downs of the business cycle? Getting a Head Start on College Savings A few strategies that may help you prepare for the cost of higher education. Keys to Investing for Retirement There are some key concepts to understand when investing for retirement.