Before you trust a stock pitch, run It through Claude

Before someone else’s conviction becomes your investment.

An email lands in your inbox.

Your favorite investing newsletter just published a new stock idea.

You open it.

Start reading:

1. The business looks good.

2. The numbers make sense.

3. The upside looks attractive.

A few minutes later, you’re checking the stock price.

But before you go further, something bothers you.

• Is that growth assumption realistic?

• Can margins really go that high?

• Did the author miss something?

So you open Claude to check the growth assumptions, profit margins, and math behind the stock pitch.

Here’s what that looks like with a real example :

I picked a stock pitch from Value Investors Club.

The author made a case for roughly 16% annual returns.

Here’s what Claude flagged:

• A math issue :Fixing it brought estimated annual returns to 15%.
  

• A recovery assumption to check: the model needed stronger sales growth in 2027, while management expected its markets to stay flat.

• A margin goal to test: the pitch assumed an 11% adjusted EBITDA margin. the business had only reached that level in 2021 and 2022, though management outlined improvements that could help it get there again.

Claude then went claim by claim, marking each as holds up, overstated, or can’t be checked.

A screenshot of Claude’s output

By the end of this article, you’ll have the skill and the steps to run this check on any stock pitch, including your own.

Let’s set it up:

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Step 1: Give Claude a stock pitch to check