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 Bridging the Confidence Gap In the world of finance, the effects of the "confidence gap" can be especially apparent. The Utility of Sector Investing Successful sector investing is dependent upon an accurate analysis about when to rotate in and out. 5 Smart Investing Strategies Getting what you want out of your money may require the right game plan.