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. Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content Understanding Homeowners Insurance Purchasing homeowners insurance is critical for protecting your home. Four Great, Unexpected Places to Raise a Family Here are 4 great, and sometimes unexpected, places to raise a family. Buying Auto Insurance For Teen Drivers Tips on insuring your teen driver.