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. Related Content The Cost of Procrastination Don't let procrastination keep you from pursuing your financial dreams and goals. The Great Debate Continues: Active vs. Passive In investments, one great debate asks the question, “Active or Passive Investing: Which Is Better?” The Cycle of Investing Understanding the cycle of investing may help you avoid easy pitfalls.