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. The Investment Risk No One’s Ever Heard Of You face a risk for which the market does not compensate you, that can not be easily reduced through diversification. 5 Smart Investing Strategies Getting what you want out of your money may require the right game plan.