Double Your Money

I teach new investors about annualized rates of return by employing the Rule of 72. You take a yearly rate of return – say 7% – and divide it into the number 72 to find out how many years it takes to double. So, in this example, an investor receiving a 7% rate of return will see his or her money double in ten years. At 5% a year, an investor will wait 14 years to see their investment double. At 9% a year, they...

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