Before you buy a stock,
ask whether it's a good business

Opening move: study the business, not the ticker

The Warren Buffett Agent's first instinct isn't to ask "will it go up tomorrow?" It asks: if the stock market closed for ten years tomorrow, would you still be happy owning this business?

It pulls every question back to the business itself, in plain English: why can't customers walk away, can prices go up, has management turned every retained dollar into more than a dollar of value, and does today's price leave you room to be wrong.

What it trusts first

This agent's corpus comes from Buffett's long public record: shareholder letters, annual-meeting Q&A, classic speeches, investment cases, and years of interviews. It pulls the one or two most relevant passages, rather than dumping the whole archive on you.

• Shareholder letters and meeting Q&A come first It starts with the principles Buffett himself has repeated for decades, then explains them through cases like Coca-Cola, Apple, American Express, and Moody's.
• Cases over slogans Saying "long-termism" isn't enough. Every substantive answer has to land on a real company, a concrete number, a lived case, or a clearly stated assumption.
• Data is raw material, not the answer Prices, filings, news, and valuation multiples are never conclusions on their own. Everything passes through the business-quality, moat, management, and margin-of-safety framework first.
• If it's not covered, it says so Outside its circle of competence, it will say "I'd need to see more before I could tell you" instead of inventing a conclusion. Restraint is part of the Buffett style.

The core framework: a good business at a good price

Buffett isn't buying a jumping stock chart — he's buying a piece of a business. Coca-Cola's brand, American Express's network, Apple's ecosystem and customer loyalty: that's the moat a good business has and an ordinary one doesn't.

But a great company isn't automatically a great investment. The agent also asks whether the price has already spent the future, whether management allocates capital rationally, and whether free cash flow keeps finding its way back to shareholders over the long run.

1. 01

   A good business you can understand

   A simple business model, durable long-term demand, customers who happily pay again and again — protected by a brand, platform, cost, or network-effect moat.

2. 02

   Able and honest management

   Managers who allocate capital well, communicate candidly, avoid foolish acquisitions, and run shareholders' money the way they'd run their own family farm.

3. 03

   Rock-solid financials

   High returns on capital sustained over time, positive free cash flow, debt kept in check. A long-run ROE above 15% is the starting line; above 20% deserves a serious look.

4. 04

   A sensible price and a margin of safety

   Buy at a discount; never overpay for a beautiful story. Better to miss one than to lock yourself into years of mediocre returns.

Coke, farms, and snowballs

This agent turns complicated questions into everyday ones. Buying a stock is like buying a farm: you wouldn't sell the farm just because a neighbor shouts a price over the fence every day. You'd care how much it harvests each year, what it costs to run, and whether the soil is wearing out.

A good business is a snowball: you need wet snow and a really long hill. The moat, the returns on capital, and the room to reinvest are the long hill; patience and a sensible price are what keep you from kicking the snowball apart yourself.

What the output looks like

A complete answer leads with a verdict, then the reasoning: buy, pass, or wait. It never stops at principles — it backs the judgment call with companies, numbers, or classic cases, and when something falls outside the circle, it says "this is beyond my circle of competence."

Who it's for

It suits people who want to study stocks as ownership stakes in real businesses. Ask it to take a company apart, estimate intrinsic value, or stress-test a moat — or simply let its slower, more patient view talk you out of your next impulsive trade.

• Anyone screening for durable, long-term businesses instead of chasing short-term themes
• Investors who need to judge moats, management, and capital-allocation quality
• Anyone who wants to value companies on free cash flow, returns on capital, and margin of safety
• Anyone who needs a standing reminder to trade less, think more, and never overpay for a story

Boundaries: the circle of competence

It won't predict short-term moves, index levels, interest-rate paths, or next week's mood. It also won't quote current prices, market caps, multiples, or financials from memory — when a number matters, it queries the database or tells you plainly to verify it.

Asked about a specific stock, it gives a judgment call inside the framework, never a firm buy or sell order. Industries it can't understand, companies that live or die by a technology inflection, names without enough financial disclosure — those go honestly into the "outside the circle of competence" pile.

Buffett

Well, hello there. I'm Warren Buffett, and I just poured my third Coke of the day. Now — which stock, or which worry, brings you in today?

This agent offers an analytical perspective only. Content is for reference and is not investment advice.

Using your standards, pick out good companies worth holding for the long term Is this stock expensive? Help me estimate its intrinsic value What 'forever businesses' like Coca-Cola are still out there today?

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