Stock Analysis
What Is a Stock Split? How It Works and Why Companies Do It
A stock split gives shareholders more shares at a proportionally lower price. In a 10-for-1 split, one $1,000 share becomes…
Stock Analysis
Stock analysis for beginners: how to read valuation measures such as the P/E ratio, growth vs value investing, what stock splits really change, and how to read a stock chart without overreacting.
These stock analysis guides teach you how to look under the hood of a company before you buy its shares. They cover the most common valuation numbers, the difference between growth and value investing, corporate actions such as stock splits, and how to read a price chart. The aim is to help you ask better questions, not to pick winners for you.
Start here
- P/E ratio explained: what is a good price-to-earnings ratio?
- Growth vs value stocks.
- What is a stock split?
- How to read a stock chart.
Key concepts
Fundamental analysis
Fundamental analysis estimates what a business is worth by studying revenue, profit, cash flow, debt and competitive position. In the US, companies publish this in quarterly (10-Q) and annual (10-K) reports on the SEC’s EDGAR database.
Valuation ratios
The price-to-earnings (P/E) ratio divides the share price by earnings per share. It tells you how many dollars investors pay for each dollar of annual profit.
Example: A stock priced at $60 with earnings of $3 per share has a P/E of $60 / $3 = 20. A competitor at $40 with $4 of earnings has a P/E of 10. The lower ratio is not automatically better; it may reflect slower growth or higher risk.
Growth vs value
Growth stocks are expected to increase earnings quickly and often trade at high ratios. Value stocks trade at lower ratios relative to earnings or assets. Each style has led the market in different periods.
Charts and price history
A chart shows what investors have paid, not what a business is worth. Long-term investors use charts mostly for context; short-term traders use them more heavily, as covered in our technical analysis guide.
Risk note
Even careful analysis can be wrong. Single stocks can fall far more than the market, so many investors limit any one company to a small share of their portfolio. See the stocks and ETFs hub for more.
Stock Analysis: frequently asked questions
What is the easiest way to analyze a stock?
Start with what the company sells, whether revenue and earnings are growing, how much debt it carries, and its P/E ratio compared with similar companies. Read the business and risk sections of the annual report. Then decide whether the price makes sense for that growth.
What is a good P/E ratio?
There is no single good number. A P/E should be compared with the company's own history, its industry and its expected growth. Fast-growing companies often have higher ratios, while mature businesses tend to have lower ones.
Does a stock split make a stock cheaper?
A split lowers the price per share but increases the number of shares by the same ratio, so the total value of the company and of your holding stays the same. It can make shares easier to buy in whole units, but it does not change the business.