rule of 72
A formula for calculating time it takes for the value of an investment to double at a specific compound annual rate of return. Calculated by dividing the number 72 by the annual rate of return. For example, the formula 72 ÷ 9 = 8 shows that it will take 8 years for an investment to double if it earns a 9 percent compound annual rate of return.
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Standard & Poor's Depositary Receipt (SPDR)
tax payable
weak dollar