Under federal law, many employees can take up to 12 weeks unpaid leave when a child is born. It's not hard to figure out if your full-time staffers qualify under federal rules. If they work part time, ...

Two years ago, Slate ran a marathon prediction calculator. In the years since, the researchers have updated their work (and the writer became a FiveThirtyEight staff writer). We’ve collaborated with ...

One quirk with Time Machine that some people have experienced is when backup runs get stuck at "Calculating Changes" instead of completing the backup. Topher Kessler MacFixIt Editor Topher, an avid ...

Daniel Jassy, CFA, is an Investopedia Academy instructor and the founder of SPYderCRusher Research. He contributes to Excel and Algorithmic Trading. Suzanne is a content marketer, writer, and ...

Calculating the internal rate of return, or IRR, of an investment is a powerful tool for businesses. When a manager is faced with a capital intensive decision, IRR can quickly compare the financial ...

Daniel McNulty began writing for Investopedia in 2012. His work includes articles on financial analysis, asset allocation, and trading strategies. Andy Smith is a Certified Financial Planner (CFP®), ...