Claire Boyte-White is the lead writer for NapkinFinance.com, co-author of I Am Net Worthy, and an Investopedia contributor. Claire's expertise lies in corporate finance & accounting, mutual funds, ...

Ariel Courage is an experienced editor, researcher, and former fact-checker. She has performed editing and fact-checking work for several leading finance publications, including The Motley Fool and ...

Calculating data fluctuations-- also called variance -- is a multi-step process that requires total accuracy. Excel 2010 provides two basic formulas for calculating fluctuations, depending on whether ...