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 Are Alternative Investments Right for You? With alternative investments, it’s critical to sort through the complexity. What’s Your Investment IQ? You make decisions for your portfolio, but how much do you really know about the products you buy? Try this quiz 5 Smart Investing Principles Principles that can help create a portfolio designed to pursue investment goals.