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  • Writer's pictureAntonio Buchanan

The Rule of 72

The rule of 72 is a way to determine how long an investment will take to double, given a fixed annual rate of interest.

Example: The rule of 72 states that $1,000 invested at 13% would take 5.5 years to turn into $2,000.

Calculation is 72 divided by the interest rate

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