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 Your Personal Recovery As the economy gathers momentum, many are waiting for their personal finances to gather momentum, too. Value vs. Growth Investing Among stock-market investors there’s long been a debate between those who favor value and those who favor growth. 5 Smart Investing Principles Principles that can help create a portfolio designed to pursue investment goals.