LAMBDA lets you turn repeated Excel logic into reusable functions that update automatically across your entire workbook.

Excel’s built-in automation tools can be faster and more reliable than AI chatbots for many everyday data tasks—if you know where to find and use them. Features like Power Query, PivotTables, Office ...

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 ...