Learn / Fundamentals

Every number on a stock page, made obvious.

Learn how markets really work, one number at a time. Every lesson is interactive and free. You play with the inputs, break the common misconceptions, and watch the metric move, the way it should have been taught the first time.

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01 Start here

Three lessons, in order

Start with company size, then profit per share, then what you pay for that profit. After that, pick any topic below by question or difficulty.

02 The library

Pick the question you have

Metrics are grouped by what you want to know. Filter by difficulty if you want a shorter path.

13 lessons

Valuation

What am I paying?

Am I paying too much for how fast it grows?

Pick a growth rate, read the tag

Is the stock price above what the assets are worth?

Stack assets, subtract debt

What if the company has no profit yet?

Switch to sales when P/E breaks

How much of the profit is paid out as dividends?

Split the profit pie between pay and keep

Profitability & returns

Is it a good business?

How much profit does the company make on owners' money?

Pick a return, play 10 years

How hard do the company's assets work to generate sales?

Same sales, different asset pile

Financial health

Can it survive?

How much does the company owe compared to what owners put in?

Tip the beam, run good and bad years

Can it pay bills due in the next year?

Move inventory out of the pile

Can it afford its loan payments?

Pick a quarter, watch the cushion

How much short-term cushion sits above near-term bills?

Assets due soon minus bills due soon

How many times a year does the company sell through its inventory?

Same warehouse, different sell-through speed

Cash flow

Is the cash real?

Did real cash land in the bank?

Raise profit on paper, watch cash lag

How much cash did the core business generate?

Start from profit, land on cash from ops

Ready to see a real stock?

Every lesson ends on a live ticker — ratios, history, and how it compares to its peers.