What Is a Stock?
In plain English
A stock, also called a share or equity, is a unit of ownership in a corporation. Companies issue stock to raise capital, and investors who purchase shares become partial owners of the business. Stockholders can profit through price appreciation if the company grows in value and through dividends if the company distributes profits. Stocks are the primary driver of long-term wealth creation in investment portfolios.
How Do Stocks Generate Returns for Investors?
Stocks generate returns in two ways. Capital appreciation occurs when the stock's market price increases above your purchase price. Dividends are cash distributions from the company's profits paid to shareholders. Historically, equities have delivered average annual returns of 7% to 10% when accounting for inflation, though returns vary greatly year to year and among individual companies.
What Makes a Stock Price Go Up or Down?
Stock prices reflect collective investor expectations about a company's future earnings and growth. Prices rise when investors believe a company will generate more value than currently reflected in the price. Prices fall on disappointing earnings, management changes, competitive threats, or broader economic concerns. Short-term prices can be driven by sentiment and speculation, while long-term prices tend to track fundamental business performance.
Should You Buy Individual Stocks or Invest in Funds?
Individual stock picking requires significant research, time, and risk tolerance. Most retail investors underperform broad index funds because of behavioral mistakes, poor timing, and insufficient diversification. Index funds and ETFs provide exposure to hundreds of companies without requiring individual stock analysis. For most investors, holding low-cost index funds as the core portfolio and limiting individual stocks to a small percentage is a prudent approach.
Frequently asked questions
What is the difference between common and preferred stock?
Common stockholders have voting rights and receive dividends after preferred stockholders. Preferred stockholders receive fixed dividends with priority over common stockholders and have a higher claim on assets in bankruptcy, but typically have no voting rights. Most retail investors hold common stock.
How do I start investing in stocks?
Open a brokerage account with a reputable provider like Fidelity, Schwab, or Vanguard. Most have no account minimums and offer fractional shares, meaning you can invest in any stock with as little as $1. A common starting point is broad index funds rather than individual stocks while building investment knowledge.
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Related terms
Dividend
A dividend is a portion of a company's profits paid out to shareholders, typically on a quarterly basis. Dividends provide investors with regular income in addition to any stock price appreciation.
Capital Gains
Capital gains are the profits you earn when you sell an investment for more than you paid for it. Whether those gains are short-term or long-term determines how much tax you owe.
Market Capitalization
Market capitalization is the total market value of a company's outstanding shares. It is used to classify companies as large-cap, mid-cap, or small-cap and helps investors understand a company's relative size.
Price-to-Earnings Ratio
The price-to-earnings (P/E) ratio compares a company's stock price to its annual earnings per share. It is one of the most widely used metrics for evaluating whether a stock is cheap or expensive relative to its profits.
Index Fund
An index fund is a type of investment fund that tracks a specific market index, like the S&P 500. It offers broad diversification at very low cost and is a cornerstone of passive investing.
Blue-Chip Stocks
Blue-chip stocks are shares of large, financially stable, well-established companies with long track records of reliable performance and dividend payments. They are considered among the safest individual stock investments.