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 Emerging Market Opportunities What are your options for investing in emerging markets? Earnings for All Seasons Earnings season can move markets. What is it and why is it important? 5 Smart Investing Strategies Getting what you want out of your money may require the right game plan.