What is the rule of 72 in investing: 5 things to know (2024)

FAQs

What is the rule of 72 in investing: 5 things to know? ›

Here's how the Rule of 72 works. You take the number 72 and divide it by the investment's projected annual return. The result is the number of years, approximately, it'll take for your money to double.

Do you know the Rule of 72? It's an easy way to calculate just how long it's going to take for your money to double. Just take the number 72 and divide it by the interest rate you hope to earn. That number gives you the approximate number of years it will take for your investment to double.

For example if you wanted to double an investment in 5 years, divide 72 by 5 to learn that you'll need to earn 14.4% interest annually on your investment for 5 years: 14.4 × 5 = 72. The Rule of 72 is a simplified version of the more involved compound interest calculation.

The rule of 8-4-3 when it comes to compounding indicates a style of investment that accelerates growth with time. Initially, a corpus doubles within 8 years through an average annual return of 12% subsequently another doubling happens for the same period after another 4 years following its initial setting up.

One can also use this to compute the returns a portfolio should generate to double money in a given time period. If you want to double it in five years, the portfolio should be invested such that it yields 72/5=14.4%.

A: Five rules drawn from Warren Buffett's wisdom for potentially building wealth include investing for the long term, staying informed, maintaining a competitive advantage, focusing on quality, and managing risk.

1 – Never lose money. Let's kick it off with some timeless advice from legendary investor Warren Buffett, who said “Rule No. 1 is never lose money.

"Rule No. 1: Never lose money. Rule No. 2: Never forget Rule No. 1."- Warren Buffet.

What is the magic Rule of 72? ›

The Rule of 72 is a calculation that estimates the number of years it takes to double your money at a specified rate of return. If, for example, your account earns 4 percent, divide 72 by 4 to get the number of years it will take for your money to double. In this case, 18 years.

1 At 10%, you could double your initial investment every seven years (72 divided by 10). In a less-risky investment such as bonds, which have averaged a return of about 5% to 6% over the same period, you could expect to double your money in about 12 years (72 divided by 6).

The Rule of 72 provides only an estimate, but that estimate is most accurate for rates of return of 5% to 10%.

This sort of five percent rule is a yardstick to help investors with diversification and risk management. Using this strategy, no more than 1/20th of an investor's portfolio would be tied to any single security. This protects against material losses should that single company perform poorly or become insolvent.

They are: (1) Use specialist products; (2) Diversify manager research risk; (3) Diversify investment styles; and, (4) Rebalance to asset mix policy. All boringly straightforward and logical.

The other determinants of investment include expectations, the level of economic activity, the stock of capital, the capacity utilization rate, the cost of capital goods, other factor costs, technological change, and public policy.

The Rule of 72 is a calculation that estimates the number of years it takes to double your money at a specified rate of return. If, for example, your account earns 4 percent, divide 72 by 4 to get the number of years it will take for your money to double.

The Rule of 72 can be applied to anything that increases exponentially, such as GDP or inflation; it can also indicate the long-term effect of annual fees on an investment's growth. This estimation tool can also be used to estimate the rate of return needed for an investment to double given an investment period.

The rule of 72 is only an approximation that is accurate for a range of interest rate (from 6% to 10%). Outside that range the error will vary from 2.4% to 14.0%. It turns out that for every three percentage points away from 8% the value 72 could be adjusted by 1.