rule of 72
rule of 72 72规则 投资本利和金额计算方法，用于计算一笔按复利计息的投资，其本利达到原投资额两倍所需年限。以72除以一项投资的利率，即可计算出所需要的年限。例如，若以复利率6%计算，投资本金需要12年(72除以6)即可翻倍。
RULE OF 72
rule of 72
rule of 72. A method for determining how many years it takes to double money invested at a compound interest rate. • For example, at a compound rate of 6%, it takes 12 years (72 divided by 6) for principal to double.