No matter which side of a financial transaction you’re on, it’s important to understand the concept of interest. It’s the charged fee for borrowing money—often a percentage of the amount borrowed. For ...

Matt Richardson is the senior managing editor for the Managing Your Money section for CBSNews.com. He writes and edits content about personal finance ranging from savings to investing to insurance.

Forbes contributors publish independent expert analyses and insights. Mark Travers writes about the world of psychology. Take a minute to think about the times you’ve felt most alive. There’s a high ...