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

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Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Samantha (Sam) Silberstein, CFP®, CSLP®, EA, ...

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 ...

Relative clauses are used to give additional information about a noun, such as a person, place or thing. Relative pronouns introduce a relative clause. They include who for people, that and which for ...