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 Risk Tolerance: What’s Your Style? Learn about what risk tolerance really means in this helpful and insightful video. The Average American Budget Learn about the average American budget in this fun and interactive piece. 4 Steps to Protecting a Child with Disabilities Planning for a child with special needs can be complicated, confusing, and even overwhelming.