Michael Boyle is an experienced financial professional with more than 10 years working with financial planning, derivatives, equities, fixed income, project management, and analytics. Timothy Li is a ...

Elvis Picardo is a regular contributor to Investopedia and has 25+ years of experience as a portfolio manager with diverse capital markets experience. Suzanne is a content marketer, writer, and ...

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Simple interest is used when a company borrows money for a loan. Usually this amount will be on a monthly basis. The formula for simple interest is principal times the interest rate times the period.

Interest is quite possibly the most complex bit of math that the average person has to use everyday. Like the Force, it can be used for good, for evil, and it binds the galaxy together. When interest ...

The Rule of 72 has likely made its way to many table conversations about money. It’s a simple, almost magical calculation that tells you how long it takes to double your investment. And you don’t need ...