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 ...

Your typical Excel workbook—the file you're working in—can get loaded with plenty of worksheets (each indicated by a tab at the bottom, which you can name). Hide a sheet if you want, rather than ...