Fundamental analysis is the method for deciding whether a company is worth investing in by looking at what really matters: how much it earns, how much it owes, and how fast it grows. Instead of guessing where the price will go, you try to estimate how much the business is worth.
The idea in one sentence
A share isn't a number on a screen: it's a slice of a real company. If the company makes money, grows and isn't drowning in debt, that slice is worth more over time. Fundamental analysis means opening the company's accounts and checking whether the business is good and whether its current price is reasonable. As the value-investing school put it: price is what you pay; value is what you get.
What it looks at (the four pillars)
However many ratios exist, almost everything boils down to four questions:
- Is it cheap or expensive? Here the P/E ratio comes in, comparing price with profit. The same P/E can be cheap or expensive depending on the sector.
- Is it growing? A company that increases its sales and profits year after year is worth more than a stagnant one. It's best to look at several years, not just the last one.
- Is it profitable? Margins and ROE tell you how much profit it squeezes from each dollar of sales and from each dollar of shareholders' money.
- Is it solid? Debt versus profits (net debt/EBITDA) and free cash flow reveal whether the business can withstand a rough patch.
Where the data comes from
U.S.-listed companies are required to file their accounts with the SEC (the market regulator) in public reports: the annual (10-K) and the quarterly ones (10-Q). They are the most reliable source there is, and they're free. That's where profits, revenue, debt and the rest come from. The only figure not in those reports is today's price, which you add.
How to start in practice
You don't need a giant spreadsheet. A good first filter is: 1) check whether the company makes money consistently; 2) see whether it grows; 3) make sure the debt isn't outsized; and 4) only then ask whether the price is reasonable by comparing its P/E with that of its sector. If you'd rather skip the math, type the ticker into the analyzer and you'll get those four pillars summarized in a 0–100 score; you can see the detail of how it's computed in how it works.
Its limits
Fundamental analysis is a starting point, not a crystal ball. It doesn't capture the qualitative side —the quality of management, a hard-to-copy competitive advantage, a regulatory change— nor does it nail the exact moment to buy. And the numbers can be distorted by one-off items. Use it to rule out the obvious and to understand what you're buying, not as an automatic order.