What is the rule of 70 investing?
The Rule of 70 is a calculation that determines how many years it takes for an investment to double in value based on a constant rate of return. Investors use this metric to evaluate various investments, including mutual fund returns and the growth rate for a retirement portfolio.
The Rule of 70 Formula
Hence, the doubling time is simply 70 divided by the constant annual growth rate. For instance, consider a quantity that grows consistently at 5% annually. According to the Rule of 70, it will take 14 years (70/5) for the quantity to double.
Put simply, the 70 percent rule states that you shouldn't buy a distressed property for more than 70 percent of the home's after-repair value (ARV) — in other words, how much the house will likely sell for once fixed — minus the cost of repairs.
These rules are used to calculate doubling time, as well as the doubling time formula. The Rule of 70 relies on the assumption that the annual growth rate will stay consistent, it calculates exponential growth, and it is the set number we use to calculate doubling time.
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.
Using the Rule of 70
For example, if an economy grows at 1 percent per year, it will take 70/1=70 years for the size of that economy to double. If an economy grows at 2 percent per year, it will take 70/2=35 years for the size of that economy to double.
Simple multiply that number by 70/100. and you'll get your answer. As 70/100=0.7 so multiply that number by 0.7. i.e. x*0.7 and you'll get your answer.
The Rule of 70 is a calculation that determines how many years it takes for an investment to double in value based on a constant rate of return. Investors use this metric to evaluate various investments, including mutual fund returns and the growth rate for a retirement portfolio.
It involves buying a property and then reselling it for more money. Usually, when someone flips a property, he or she makes repairs and improvements beforehand. It can become illegal if the person falsely represents the condition and value of the property. This equates to fraud, which carries serious consequences.
This rule states that the most an investor should pay for a property is 70% of the After Repair Value minus the estimated rehab cost. The idea is that the remaining 30% will cover the real estate commission, closing costs and so forth while still leaving a healthy profit.
Why does the rule of 70 work?
The reason why the rule of 70 is popular in finance is because it offers a simple way to manage complicated exponential growth. It breaks down growth formulas into a simple equation using the number 70 alongside the rate of return.
The rule of 70 is used to judge growth rate. GDP is used to measure economic growth and an economy's ability to double its GDP. The growth rate is determined by dividing 70 by the rate of growth, which determines how long GDP will take to double.
Adjusted for inflation, it still comes to an annual return of around 7% to 8%. If you earn 7%, your money will double in a little over 10 years.
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.
Final answer:
It will take approximately 15.27 years to increase the $2,200 investment to $10,000 at an annual interest rate of 6.5%.
Try Flipping Things
Another way to double your $2,000 in 24 hours is by flipping items. This method involves buying items at a lower price and selling them for a profit. You can start by looking for items that are in high demand or have a high resale value. One popular option is to start a retail arbitrage business.
The rule of 70 (and 72) comes from the natural log of 2 which is 0.693.. or 69.3%. Basically this is rounded to 70 (or 72) to make doing the math in your head easier. It's not 100% accurate but usually when you are asking about the doubling time of a rate by quick mental estimate, a little error doesn't matter.
According to rule 70, the no. of years that a variable can take to become double is determined by taking a ratio of 70 and the annual percentage growth rate of the given variable. In this case, the annual growth rate of real GDP is 70/20 years which is 3.5% per year.
The rule of 69 is simple: divide 69 by the growth rate percentage. It will then tell you how many periods it'll take for the value to double. For example, if a business has 10% annual growth, divide 69 by 10%. That gives you 6.9 years.
The value of 70% of 500 is 350.
How do you calculate profit?
Profit is revenue minus expenses. For gross profit, you subtract some expenses. For net profit, you subtract all expenses.
To calculate interest rates, use the formula: Interest = Principal × Rate × Tenure. This equation helps determine the interest rate on investments or loans.
Final thoughts on the rule of 72
Keep in mind it is only a mathematical formula that helps determine how long it hypothetically takes for your money to double. It emphasizes the power of compound earnings over time and is not a guarantee of success.
The rule of 72 is best for annual interest rates. On the other hand, the rule of 70 is better for semi-annual compounding. For example, let's suppose you have an investment that has a 4% interest rate compounded semi-annually or twice a year. According to the rule of 72, you'll get 72 / 4 = 18 years.
The Rule of 72 is a simple way to determine how long an investment will take to double given a fixed annual rate of interest. Dividing 72 by the annual rate of return gives investors a rough estimate of how many years it will take for the initial investment to duplicate itself.
