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 1,000 shares and you buy 10 of them, you own 1% of the business. The company uses the money from selling shares to pay for operations, build facilities, hire workers, or expand. In return, you become a part-owner — which means you can benefit if the company does well, but you also lose money if it fails.

Stocks are traded on exchanges like the New York Stock Exchange (NYSE) or NASDAQ. These are marketplaces where buyers and sellers meet to trade shares. The price of a stock changes throughout each trading day based on what people are willing to pay for it. If many people want to buy a stock, the price goes up. If many people want to sell, the price goes down.

Key Takeaways

  • Owning a stock means you own a percentage of a real company, and the value of your ownership changes as the company's prospects change.
  • Stock prices move based on supply and demand — how many people want to buy versus how many want to sell at any given moment.
  • Some stocks pay dividends, which are regular cash payments to shareholders, while others focus on growth and reinvest profits back into the business.
  • You can make money from stocks in two ways: by selling them for more than you paid, or by receiving dividend payments while you hold them.
  • Stocks carry real risk — a company can lose value, cut dividends, or go bankrupt, which means you can lose some or all of your money.

How stock prices actually move

Stock prices are not set by the company itself — they are set by the market. Every time someone buys or sells a share, that transaction happens at a specific price. If you want to sell 100 shares of Apple and someone offers you $150 per share, that becomes the price for that trade. The next trade might happen at $150.50 or $149.75, depending on what the next buyer and seller agree to.

Over time, stock prices reflect what investors think a company is worth. If a company reports strong earnings, investors expect it to make more money in the future, so they bid the price up. If a company reports weak earnings or faces a lawsuit, investors expect lower future profits, so they sell and the price falls. News, economic conditions, industry trends, and management decisions all influence what investors think a company is worth.

This means stock prices can be volatile. A stock might gain 5% one day and lose 3% the next. Over longer periods — years rather than days — prices tend to reflect the actual performance of the business. But in the short term, prices can swing based on emotion, rumors, or temporary market conditions.

Dividends versus growth stocks

Some companies return profits to shareholders as dividends — regular cash payments, usually quarterly. A company might pay $2 per share every three months. If you own 100 shares, you receive $200 each quarter. Dividend-paying stocks are common among established companies like utilities, banks, and consumer goods manufacturers. They appeal to investors who want steady income from their holdings.

Other companies reinvest all profits back into the business instead of paying dividends. These are often younger or faster-growing companies. They use the money to develop new products, enter new markets, or buy other companies. Investors in growth stocks make money primarily by selling the shares for more than they paid — they are betting the company will become more valuable over time.

Neither approach is inherently better. A dividend stock gives you income while you wait. A growth stock requires patience but can deliver larger gains if the company succeeds. Many investors own both types.

The two ways to make money from stocks

The first way is capital appreciation — buying a stock at one price and selling it at a higher price. If you buy 50 shares of a company at $100 per share and sell them at $120 per share, you make $1,000 (minus any fees or taxes). This works whether the company pays dividends or not.

The second way is dividend income — holding a stock that pays regular cash distributions. If you own 100 shares of a company that pays a $1 annual dividend, you receive $100 per year just for holding the shares. You can reinvest that dividend by buying more shares, or you can pocket the cash.

Many investors combine both approaches. They buy stocks they believe will increase in value, and they choose companies that also pay dividends so they earn income along the way. Over decades, this combination has historically produced solid returns for long-term investors.

What you can lose when you own stocks

Stock ownership carries real risk. If you buy a stock at $100 per share and the price falls to $60, you have lost $40 per share. You only recover that loss if the price rises again — or you accept the loss by selling. If a company goes bankrupt, the stock can become worthless, and you lose your entire investment in that company.

Dividends can also be cut or eliminated. A company that has paid $1 per share annually might reduce it to $0.50 if business weakens. Shareholders who were relying on that income are suddenly earning less.

The longer you hold a stock, the more time it has to recover from temporary price drops. But there is no may provide any individual stock will recover. This is why financial advisors often recommend owning many stocks across different industries and company sizes — if one company struggles, the others may do well, and the losses are spread out.

Stocks versus bonds and other investments

Stocks are one type of investment. Bonds are loans you make to companies or governments; they pay a fixed interest rate and are generally less risky than stocks but offer lower potential returns. Mutual funds and exchange-traded funds (ETFs) are baskets of many stocks or bonds bundled together, so you own a piece of many companies with a single purchase. Real estate, savings accounts, and certificates of deposit (CDs) are other ways to invest or store money.

Stocks historically have produced higher average returns than bonds or savings accounts over long periods, but they also have larger year-to-year swings. The choice between stocks and other investments depends on your time horizon, how much risk you can tolerate, and what you are saving for.

How to actually buy and sell stocks

To buy stocks, you need a brokerage account — an account with a company that connects you to the stock market. Major brokerages include Fidelity, Charles Schwab, E*TRADE, and Vanguard. You open an account, deposit money, and then you can search for stocks by company name or ticker symbol (a short code like AAPL for Apple or MSFT for Microsoft). You enter how many shares you want to buy and at what price, and the brokerage executes the trade.

Most brokerages charge little or no commission per trade anymore, though some may charge fees for certain services. You can also set up automatic investments — for example, $500 per month into a particular stock or fund — so you do not have to remember to buy manually.

Selling works the same way: you log into your account, select the stock, enter how many shares you want to sell, and the brokerage sells them at the current market price. The cash lands in your account within a few days.

Frequently Asked Questions

Can I lose more money than I invested in a stock?

In normal circumstances, no. If you buy 100 shares at $50 per share, you invest $5,000. If the stock falls to $0, you lose $5,000 — your entire investment. But you do not owe additional money. The only exception is if you borrow money to buy stocks (called buying on margin), in which case you could theoretically owe more than your initial investment.

Do I have to hold a stock for a certain amount of time?

No. You can buy a stock and sell it the same day if you want. However, if you hold a stock for more than one year before selling, you may may have access to for lower tax rates on your gains in many countries. Holding for shorter periods is taxed at higher rates. Check your local tax rules.

What is the difference between a stock and a share?

They mean the same thing. A share is one unit of ownership in a company. If a company has issued 1 million shares, one share represents one millionth of the company. Stock is the general term for ownership in a company, and shares are the individual units you buy and sell.

How do I know which stocks to buy?

Research the company's financial statements, read analyst reports, and understand what the business does and how it makes money. Many investors start by reading annual reports (called 10-K filings) that companies file with the Securities and Exchange Commission (SEC). Others use stock screeners — tools that filter stocks by price, earnings, dividend yield, and other metrics — to narrow down options.

Can I buy stocks in companies outside my country?

Yes. Most brokerages allow you to buy stocks listed on foreign exchanges, though there may be additional fees or currency conversion costs. You can also buy American Depositary Receipts (ADRs), which are certificates representing shares of foreign companies and trade on U.S. exchanges.