The Rule of 72 Are You Making the Most of Your 401(k)? In this ebook, we outline your 401(k) choices and explore critical mistakes to avoid. Download it today First Name Last Name Email Address Thank you! Oops! 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 The Fed and How It Got That Way Here is a quick history of the Federal Reserve and an overview of what it does. A Decision Not Made Is Still a Decision Investors who put off important investment decisions may face potential consequence to their future financial security. 5 Smart Investing Principles Principles that can help create a portfolio designed to pursue investment goals.