What Stocks Are and How They Work
A stock is a small piece of ownership in a company
When you buy a stock, you own a share of that company. If a company issues one million shares and you own 100 of them, you own one ten-thousandth of the business. That ownership stake is real — it comes with voting rights on major company decisions and a claim on the company's profits.
Companies issue stock to raise money. Instead of borrowing from a bank, a company can sell pieces of itself to investors. You get ownership; the company gets cash to build factories, hire people, or expand. The company does not have to pay the money back the way it would with a loan.
Key Takeaways
- Buying a stock means owning a piece of a real company, with voting rights and a claim on its profits.
- Stock prices move based on what investors think the company will earn in the future, not just what it earns today.
- You make money from stocks in two ways: when the price rises and when the company pays dividends.
- Stocks are riskier than bonds or savings accounts because prices can fall sharply and companies can fail.
- You buy and sell stocks through a brokerage account, which you can open online in minutes.
How stock prices change
Stock prices move constantly during trading hours. A stock's price at any moment reflects what investors are willing to pay for it right then — which depends almost entirely on what they think the company will earn in the future, not what it earned last year.
If a company announces strong earnings or a new product, investors expect higher future profits and bid the price up. If the company misses targets or faces a lawsuit, investors expect lower profits and sell, pushing the price down. The price can also move on news that has nothing to do with the company itself — a recession, a change in interest rates, or a shift in investor mood.
This is why stocks are volatile. A company's actual business might be stable, but the stock price can swing 10 or 20 percent in a week based on investor sentiment alone.
The two ways you make money from stocks
Capital gains happen when you sell a stock for more than you paid. If you buy Apple at $150 and sell it at $180, you have a $30 gain per share. This is the most visible way people think about stock returns.
Dividends are payments the company sends to shareholders, usually quarterly. Not all companies pay dividends — young growth companies often reinvest all profits back into the business. Mature companies like Coca-Cola or Johnson & Johnson pay dividends regularly. A dividend might be $2 per share per year, so owning 100 shares would bring you $200 annually.
Your total return combines both. You might buy a stock at $100, receive $4 in dividends over a year, and sell it at $110 — a $14 gain on your $100 investment.
Why stocks are riskier than other investments
A stock can fall as easily as it can rise. If you buy a stock at $100 and it drops to $60, you have lost $40 per share unless you hold it long enough for the price to recover. Some stocks never recover — the company might fail, face bankruptcy, or simply never grow as expected.
This is different from a savings account, where your money is insured by the FDIC up to $250,000 and will not disappear. It is also different from a bond, where you know the exact payment schedule and the company must pay you before it pays shareholders. With a stock, you are last in line if the company fails — creditors and bondholders get paid first, and shareholders get whatever is left.
The upside is that stocks have historically returned more than bonds or savings accounts over long periods. The downside is that you have to be able to stomach the short-term swings without panic-selling at the bottom.
How to buy and sell stocks
You buy stocks through a brokerage account. A brokerage is a company licensed to execute trades on your behalf. You open an account with a brokerage — Fidelity, Charles Schwab, E-Trade, and Vanguard are large ones, but there are dozens — and link a bank account.
Once your account is open and funded, you search for the stock you want by its ticker symbol (Apple is AAPL, Microsoft is MSFT) and place an order. A market order buys at the current price immediately. A limit order lets you set a maximum price you will pay and waits until the stock drops to that level or below.
Selling works the same way in reverse. You select the stock, choose how many shares to sell, and place an order. The cash lands in your brokerage account within a few days and you can withdraw it to your bank account.
Individual stocks versus stock funds
Buying individual stocks means you pick the companies yourself and own them directly. You control exactly what you own and pay no fund manager fees. But you also have to research companies, monitor them, and rebalance your holdings yourself.
A stock fund — either a mutual fund or an ETF — pools money from many investors and buys dozens or hundreds of stocks. A fund manager or a computer algorithm decides which stocks to buy. You own a share of the fund, not the individual stocks. This spreads your risk across many companies, so one bad stock does not sink your investment.
Most individual investors do better with funds because they require less research and provide automatic diversification. But some investors enjoy picking individual stocks and have the time and temperament for it.
Taxes on stock gains and dividends
When you sell a stock for a profit, you owe capital gains tax. The rate depends on how long you held it. If you held it less than a year, it is taxed as ordinary income at your regular tax rate. If you held it a year or more, it is taxed at the long-term capital gains rate, which is lower — 0, 15, or 20 percent depending on your income.
Dividends are also taxed, though the rate varies. may have access to dividends (from most large US companies) are taxed at the long-term capital gains rate. Non-may have access to dividends are taxed as ordinary income.
If you hold stocks in a retirement account like a 401(k) or IRA, you do not pay taxes on gains or dividends until you withdraw the money — or in a Roth account, never. This is one reason retirement accounts are powerful tools for long-term stock investing.
Frequently Asked Questions
Can a stock go to zero?
Yes. If a company goes bankrupt, shareholders are last in line and often get nothing. This is rare for large established companies but common for small or struggling ones. This is why diversification — owning many stocks or a stock fund — matters.
Do I have to hold a stock forever?
No. You can sell any stock any trading day the market is open. You can hold for decades or a few weeks. The longer you hold, the more likely you are to benefit from long-term capital gains tax rates and to ride out short-term price swings.
What is the difference between a stock and a share?
They mean the same thing. A share is one unit of stock. If you own 100 shares of Apple, you own 100 units of Apple stock.
Do I need a lot of money to start buying stocks?
No. Most brokerages have no minimum account balance. You can open an account with $100 or even less. Some brokerages offer fractional shares, so you can buy a portion of an expensive stock instead of waiting to save for a full share.
What happens if the company I own stock in gets bought by another company?
Your shares are usually converted to shares of the new company, or you receive cash equal to the agreed purchase price. The acquiring company's board and shareholders must vote to approve the deal, and regulators review it for antitrust issues. You do not have to do anything — the brokerage handles the conversion automatically.