Direct Answer
Direct answer: Company fundamental metrics like the P/E ratio, PEG ratio, EPS, revenue growth, and free cash flow measure a company's valuation, growth, and profitability so investors can judge whether the underlying business supports its current market price. No single metric determines whether a stock is attractive, they must be evaluated together against the company's specific business model.
Key Takeaways
- Metrics generally fall into three categories, valuation, growth, and quality, and a company can look strong in one category while weak in another.
- A low P/E isn't automatically cheap and a high P/E isn't automatically expensive; each can reflect real business risk or durable growth quality.
- Share dilution can hide weak per-share performance, net income can grow while EPS stays flat if shares outstanding rise.
- Comparing companies across unrelated industries is a common mistake, since a bank, utility, and software company naturally trade at very different multiples.
What Fundamental Analysis Measures
Fundamental analysis examines a company's financial performance, business quality, growth prospects, and valuation. The goal isn't to find the lowest stock price, it's to understand what you're paying for and whether the underlying business can support its current market valuation. Five of the most commonly used metrics:
| Metric | Primary question |
|---|---|
| P/E ratio | How much are investors paying for each dollar of earnings? |
| PEG ratio | Is the valuation reasonable relative to expected earnings growth? |
| EPS | How much profit is attributable to each common share? |
| Revenue growth | How quickly is the company expanding its sales? |
| Free cash flow | How much cash remains after operating and capital expenditures? |
No single metric establishes whether a stock is attractive. Investors evaluate valuation, growth, profitability, cash generation, financial condition, and risk together.
Valuation, Growth, and Quality Metrics
Fundamental metrics generally fall into three categories: valuation (P/E, forward P/E, PEG, price-to-sales, price-to-FCF, EV/EBITDA) measures what investors are paying; growth (revenue growth, EPS growth, FCF growth) measures business expansion; quality (gross/operating/FCF margin, ROE, ROIC, debt-to-equity) measures durability and efficiency. A company can look attractive under one category and weak under another, a stock might have rapid revenue growth, negative free cash flow, and heavy dilution, while another has slow growth, strong cash flow, and a durable dividend. Neither is automatically better; it depends on the business model and your objectives.
The Core Formulas
P/E ratio = stock price ÷ earnings per share. A $60 stock with $3 diluted EPS trades at 20× earnings. Full P/E guide →
PEG ratio = P/E ÷ expected annual EPS growth rate (growth entered as a whole number). P/E of 24 with 12% expected growth = 2.0 PEG. Full PEG guide →
Basic EPS = (net income − preferred dividends) ÷ weighted-average common shares. ($500M − $20M) ÷ 200M = $2.40. Full EPS guide →
Revenue growth = (current revenue − previous revenue) ÷ previous revenue × 100. $4B to $4.6B = 15% growth. Full revenue growth guide →
Free cash flow = operating cash flow − capital expenditures. $1.2B − $350M = $850M FCF. Full FCF guide →
How the Five Metrics Work Together
Consider two fictional software companies. Company Alpha: P/E 22, PEG 1.6, EPS growth 14%, revenue growth 10%, FCF margin 20%. Company Beta: P/E 38, PEG 1.3, EPS growth 29%, revenue growth 25%, FCF margin 8%. Alpha has the lower valuation and stronger cash-flow margin; Beta has faster growth and a lower PEG because its expected earnings growth is much higher. The better investment can't be determined from these numbers alone, you'd also need to evaluate growth durability, competitive position, debt, dilution, and forecast reliability. See the full comparison framework →
Common Fundamental Analysis Mistakes
- Treating a low P/E as automatically cheap, it may reflect declining earnings or real business risk
- Treating a high P/E as automatically expensive, a high-quality, durable-growth company may justify it
- Using unreliable growth estimates in PEG, the ratio is only as good as the growth forecast
- Ignoring share dilution, net income can grow while EPS stays flat if shares outstanding rise
- Focusing only on revenue growth without checking profitability or cash flow
- Comparing unrelated industries, a bank, utility, and software company naturally trade at different multiples
Fundamental Metrics Checklist
Before comparing companies, collect: current price, market cap, trailing and forward P/E, PEG, basic and diluted EPS, EPS growth, revenue growth, operating margin, operating cash flow, capital expenditures, free cash flow, FCF margin, debt, cash, share-count growth, and analyst estimates.
Frequently Asked Questions
What are the most important fundamental stock metrics?
Important metrics include revenue growth, earnings growth, EPS, free cash flow, profit margins, debt, return on invested capital, and valuation multiples.
Is a low P/E ratio always good?
No. A low P/E can indicate undervaluation, but it can also reflect shrinking earnings, high debt, cyclicality, or structural business problems.
Is revenue growth more important than EPS growth?
It depends on the company's stage and business model. Early-stage companies may prioritize revenue growth, while mature companies are generally expected to produce profits and cash flow.
Why is free cash flow important?
Free cash flow shows how much cash remains after operating activities and capital expenditures. It can be used for debt repayment, dividends, share repurchases, acquisitions, or reinvestment.
Which metric is best for comparing stocks?
No single metric is best. Comparisons should combine valuation, growth, profitability, cash flow, financial strength, and business quality.
Do these metrics work the same way for a bank as for a manufacturer?
Several do not translate. Free cash flow as commonly defined assumes capital expenditure is the main investment outflow, which does not describe a lender whose balance sheet is the business. Banks and insurers are normally assessed on measures such as book value, return on equity and regulatory capital instead. Applying a general metric set across a financial company produces numbers that compute correctly and describe something other than what they do elsewhere.
How do you decide which metric to look at first?
Start from the question rather than the metric. If the concern is whether the business converts sales into cash, cash flow measures come first. If it is whether the price already reflects expectations, valuation multiples do. If it is whether growth is real, revenue decomposition does. Running the same fixed order regardless of question means spending time on figures that cannot change the conclusion.
What does it mean when two of these metrics disagree?
Disagreement is information rather than a problem to resolve. Rising earnings alongside falling cash flow points to a gap between accounting profit and collected cash, and a low valuation multiple alongside weak growth points to a market pricing in decline. The useful step is identifying which underlying feature produces the divergence, since that feature is usually the substantive issue and the metrics are just where it becomes visible.
Should metrics be taken from the company's own presentation or from a data provider?
Company presentations often lead with adjusted figures defined by the company itself, and providers apply their own standardization, so the two frequently differ for the same period. Neither is automatically correct. Reading the reconciliation in the filing shows exactly what was excluded from an adjusted figure, and that reconciliation is the only place where the difference between the two versions is documented rather than inferred.