Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Somer G. Anderson is CPA, doctor of accounting, and an accounting and finance professor who ...

Daniel Jassy, CFA, is an Investopedia Academy instructor and the founder of SPYderCRusher Research. He contributes to Excel and Algorithmic Trading. Return on investment (ROI) measures the amount of ...

David Lumb is a managing editor for the mobile team, covering mobile and gaming spaces. Over the last decade, he's reviewed phones for TechRadar as well as covered tech, gaming, and culture for ...

Don't think that Excel is just for numbers. Many people populate Excel's seemingly infinite grids with data, using it as a flat-file database. It can serve as a relatively effective contact manager or ...