A share is a piece of a business
When you buy a share you own a small part of a company: its sales, its profits, its factories, its patents and its future. The ticker symbol on a screen is just the address of that ownership.
Warren Buffett often compared stocks to a farm. If you owned a farm you would not check its price every hour. You would ask how big the harvest was, whether the soil was improving, and whether the farm earned more than it cost to run. Stocks deserve the same questions.
A second picture: owning a local franchise. You would care about sales per store, the margin on each burger, and whether new locations are opening. You would not sell the franchise because a neighbour said the market felt shaky.
Two clocks
Stocks run on two clocks.
| Clock | What moves the price | How long it lasts |
|---|---|---|
| Short term | Stories, fund flows, interest-rate fear, headlines | Days to months |
| Long term | Revenue growth, earnings growth, margins | Years |
Most mistakes come from reacting to the short clock when you meant to invest on the long one. A company can fall 30% in a quarter while its revenue grows 25%. The owner's question is not "why is the price down?" but "is the business still getting better?"
What this means in practice
- Judge a holding by its latest quarterly results, not its latest price.
- Expect big price swings even in excellent companies.
- Buy more of a great business when the price falls and the fundamentals hold.
- Sell only when the business itself changes: growth stalls for good, margins break, or the balance sheet weakens.
See Fundamental analysis for what to check and Investor or trader for how to stay on the long clock.
See also
- What is a stock? A plain-English explanation of what a stock is, how owning shares works, how stock prices are set, and how shareholders make money.
- A long-term investing philosophy Buy companies with strong growth fundamentals, hold them, and rarely sell. Why a long horizon and a few simple habits beat short-term trading.
- Fundamental analysis What fundamental analysis is, the four things it checks in every company, and how it differs from reading price charts.
Pages that link here: Investor or trader
Last updated September 30, 2026. Education only, not investment advice.