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Money Mistakes: Are you mistake prone?
The more you understand the markets, the less likely you are to make big errors that set you back.
By David Futrelle
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1. You sock away $100 a month in your IRA for a decade, earn a breathtaking 12% a year, and end up with $23,000. If you invest $200 a month over 10 years but make a paltry 3%, roughly how much do you end up with?