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 Global and International Funds Investors seeking world investments can choose between global and international funds. What's the difference? The Business Cycle How will you weather the ups and downs of the business cycle? Strategies For Managing Student Loan Debt Five strategies for managing your student debt.