The rule of 72 is a shortcut investors can use to determine how long it will take their investment to double based on a fixed annual rate of return. To use the rule of 72, divide 72 by the fixed rate ...

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When we put our money in the market, or before we even do, one of the biggest questions we have is: How long will it take for this investment to really grow? Luckily, there's a mathematical shortcut ...