Stock Metrics Explained
Plain-language explanations of the key financial ratios every beginner investor should understand.
Understanding a handful of key financial metrics is the foundation of smart stock research. This page explains the most important metrics every beginner investor should know — in plain, simple language.
Key Stock Metrics at a Glance
| Metric | Full Name | What It Measures |
|---|---|---|
| P/E | Price-to-Earnings Ratio | How much investors pay per $1 of a company’s earnings |
| P/B | Price-to-Book Ratio | How stock price compares to net asset value per share |
| ROE | Return on Equity | How efficiently a company generates profit from shareholders’ equity |
| Dividend Yield | — | Annual dividends as a percentage of stock price |
| Market Cap | Market Capitalization | Total market value of all outstanding shares |
| EPS | Earnings Per Share | A company’s net profit divided by number of shares |
| Debt/Equity | Debt-to-Equity Ratio | How much debt a company uses relative to equity |
P/E Ratio — Price-to-Earnings
The P/E ratio is calculated by dividing a stock’s current price by its earnings per share (EPS). For example, if a stock trades at $50 and its EPS is $5, the P/E ratio is 10x.
A lower P/E ratio may suggest the stock is modestly valued relative to earnings, while a higher P/E may indicate the market expects strong future growth. Context matters — comparing a company’s P/E to its peers and its own historical range is more useful than looking at it in isolation.
P/B Ratio — Price-to-Book
The P/B ratio compares a stock’s market price to its book value (total assets minus total liabilities, divided by shares outstanding). A P/B below 1.0 means the stock is trading at a discount to its net assets — which can signal value, or can reflect underlying problems.
ROE — Return on Equity
ROE measures how much net income a company generates per dollar of shareholders’ equity. A higher ROE generally indicates a more profitable and efficient business. ROE above 15% is often considered strong, though industry benchmarks vary widely.
Dividend Yield
Dividend yield is calculated as the annual dividend per share divided by the stock’s current price, expressed as a percentage. For example, if a stock pays $2 in dividends per year and trades at $50, the dividend yield is 4%. This metric is especially important for income-focused investors.
Market Capitalization
Market cap = share price × total shares outstanding. It categorizes companies by size:
- Large-cap: Over $10 billion — generally more stable, established companies
- Mid-cap: $2 billion to $10 billion — often a balance of growth potential and stability
- Small-cap: Under $2 billion — higher growth potential but also higher risk
Learn More in Our Guides
- 5 Stock Metrics Every Beginner Investor Should Know
- Dividend Yield Explained for Beginner Investors
- Market Cap Explained: Large-Cap, Mid-Cap, and Small-Cap Stocks
- What Is ROE? Understanding Return on Equity in Simple Terms
- What Is the P/B Ratio and How Should Investors Use It?
Disclaimer: SmartSpot Pro provides educational stock research information only. Nothing here is financial advice or a recommendation to buy or sell any security. Always do your own research before making investment decisions.