Question
The rule of 72 can be used to give an estimate of the
time period in which an investment amount can grow by ______, given the annual rate of return.Solution
The rule of 72 is a simple way to determine how long an investment will take to double (i.e. grow by 100%), given a fixed annual rate of interest. By dividing 72 by the annual rate of return, investors obtain a rough estimate of how many years it will take for the initial investment to duplicate itself. However, the Rule of 72 is reasonably accurate for low rates of return.
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