Claude in Excel is a real upgrade. It is also not the point.
The feature lives in a cell. The edge lives in what you do after the cell is filled. Building a model used to be the slow, skilled part. Now building is cheap and review is the scarce skill.
Three shifts, AI builds and you judge:
1. Model review: stop asking AI to build the model, ask it to break it. Wrong row references, hardcoded numbers inside formulas, sign flips, totals that stop tying. 2. Assumption challenge: every input gets defended. Why this growth rate, this margin, this discount rate. "It was in the template" is not a reason. 3. Source tie-out: every number traces to a filing, a transcript, or a labeled assumption. A page and a date, or it comes out of the model.
Notice what the AI is not doing: it is not telling you the company is cheap, what it is worth, or whether to act. That stays with you.
Save this one and run it on your next model.
Educational content only. Not investment advice, and not a recommendation to buy, sell, or hold any security. Wall Street Prompt. Always verify against the primary source.