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How to use Claude for stock research

Use Claude to read long company documents for you, then check the few numbers that matter. Give it the source, ask it to point to the page, and keep the decision yours.

Beginner guide · 8-minute read · Updated 2026-10-28

What Claude is good for here

Claude is an AI chat assistant made by Anthropic. For stock research, its best use is reading long documents: a full annual report, two earnings-call transcripts, a stack of company press releases. Things you'd never read cover to cover yourself.

It is not a source of facts on its own. From memory, it can mix up years, numbers and even companies. So the method is always the same: you bring the document, Claude reads it, you check the key numbers.

What Claude can do changes by plan and by update. As of October 2026, check Anthropic's Claude help center for current file limits and whether web search is on for your account.

Job 1: Read a 10-K for you

A 10-K is the yearly report US public companies file with the SEC. It's long, dry and full of the things that matter: how the company makes money, how much it owes, and what it thinks could go wrong. See 10-K filing for more.

Download the PDF from the SEC's EDGAR site or the company's investor page. Upload it and start here:

Read the attached 10-K. Using only this file, answer in plain words:
1. How does this company make money? Name its biggest product lines.
2. Revenue this year and last year. Give the page or table.
3. Total debt and cash. Give the page or table.
4. The 5 biggest risks the company names, one line each.
If something isn't clearly in the file, write "not found".

Asking for the page or table is the most useful line here. It turns a 300-page check into a 30-second one.

Then ask the question you actually care about:

What changed in the risk section compared with what a reader
would expect from last year's report? If you don't have last
year's report, say so instead of guessing.

Better still, upload last year's 10-K too and ask it to compare the two risk sections line by line. New risks are often the most telling part of the report.

Job 2: Compare two earnings calls

Every quarter, most public companies hold a call where bosses talk through results and answer questions. The transcripts are long. Comparing two of them by hand takes an hour. Claude does it in a minute or two.

Paste or upload two transcripts, one quarter apart:

Here are two earnings call transcripts for the same company,
one quarter apart. Compare them:
1. What did management say they expect next (their guidance)?
   Did it go up, down or stay the same?
2. Which topics got more time in the newer call? Which got less?
3. List any analyst questions management avoided or answered vaguely.
Quote the exact sentence for each point.

"Quote the exact sentence" keeps it honest. If it can't quote it, it may have made it up. Guidance in plain words is the company's own forecast for its next quarter or year.

Job 3: Build your own checklist

Claude is good at turning a fuzzy goal into a short list. Use that to build the checks you'll run on every stock, so you stop deciding by mood.

I want a 10-point checklist I run before I put any stock on my
watchlist. Keep each point to one line I can answer yes or no.
Include where to find each answer (10-K, broker, earnings calendar).
Don't include anything that predicts the price.

Then edit it. Cut what you won't really check. Add your own rules. A checklist you wrote beats one you were handed.

If you sell options, add the checks that matter for selling: would you own this stock at the strike, is the earnings date inside the trade, and is the cash really set aside. Those are the core of the wheel strategy.

What to check every time (hypothetical example)

Here's why the checking step is not optional. This is an illustration, not a trade idea, on made-up company XYZ.

You upload XYZ's 10-K and ask about debt. Claude answers: "Total debt fell from $3.0 billion to $2.2 billion." That sounds great. You check the table it named. The $2.2 billion is long-term debt only. Short-term debt adds another $0.9 billion. Total debt really went up, to $3.1 billion.

Say you skipped the check. Feeling good about the "lower debt," you sell a Cash-secured put at a $40 strike for $1.20 a share. The stock drops to $32 and you're assigned.

One line in a table. One check you skipped. Here are the checks to run every time:

• The 2 or 3 numbers your decision rests on. Open the page it named and read them yourself.
• "Total" vs "part of." AI often mixes up a subtotal with a total.
• The year. Make sure it read this year's column, not last year's.
• Anything from memory. If it didn't come from the file, treat it as a rumour until you check it.

My guide on how to fact-check AI answers about money has more.

What not to ask

• "Should I buy XYZ?" You'll get a guess. See can ChatGPT pick stocks; the same goes for Claude.
• "What's XYZ trading at?" Use your broker for prices.
• "Which strike should I sell?" That's your call, made with the live chain in front of you.

For where AI fits when you sell options, see our AI for options trading guide. For how Claude stacks up against the other two, see ChatGPT vs Claude vs Gemini for stock research.

Questions