How Stocks Work: What Happens When You Buy a Share

What happens when you buy a stock

When you buy a stock, you own a small piece of a real company. That piece is called a share. If a company has issued one million shares and you own 100 of them, you own one ten-thousandth of that company. You do not own a building or equipment — you own a proportional claim on the company's earnings and assets.

The company uses the money from selling shares to fund operations, pay employees, build facilities, or expand. In return, shareholders get two potential ways to make money: the stock price can rise (and you can sell your shares for more than you paid), or the company can distribute profits to shareholders as dividends. Most stocks do not pay dividends; investors buy them hoping the price will go up.

Stock prices move based on what other investors think the company is worth. If investors believe a company will grow and become more profitable, they buy more shares, and the price rises. If they lose confidence, they sell, and the price falls. No single investor sets the price — it emerges from millions of buy and sell orders happening throughout the trading day.

Key Takeaways

• A stock represents fractional ownership in a company; you own a claim on its earnings and assets, not physical property.
• Stock prices rise and fall based on investor demand, company performance, and expectations about future earnings.
• You can make money from stocks through price appreciation (selling higher than you bought) or dividends (company distributions of profit).
• Stock markets operate during set hours on trading days, and you buy and sell through a brokerage account.
• Stocks carry risk: a company's value can decline, and you could lose part or all of your investment.

How stock prices are set and change

Stock prices are determined by supply and demand in the market. When more people want to buy a stock than sell it, the price goes up. When more people want to sell than buy, the price goes down. This happens in real time during market hours — typically 9:30 a.m. to 4 p.m. Eastern time on weekdays when U.S. markets are open.

Several things influence whether investors want to buy or sell. Company earnings reports, announcements about new products, changes in leadership, and broader economic news all affect investor sentiment. A company might report higher profits than expected, and the stock price jumps. Or a competitor might release a better product, and the price falls. Investors also react to what they think will happen in the future, not just what has already happened.

You do not need to predict these moves perfectly to invest in stocks. Most long-term investors buy stocks in companies they believe will grow over years or decades, and they hold through price fluctuations. Short-term traders try to profit from daily or weekly price swings, but this is riskier and requires more active monitoring.

Dividends and shareholder returns

Some companies distribute a portion of their profits to shareholders as dividends. A dividend is usually paid in cash, though occasionally in additional shares. Not all stocks pay dividends — many younger or faster-growing companies reinvest all profits back into the business instead.

Dividend-paying stocks are common among mature, stable companies like utilities, banks, and consumer goods manufacturers. If a stock pays a dividend of $2 per share per year and you own 100 shares, you receive $200 annually. The dividend is paid on a schedule set by the company — often quarterly (four times per year).

Dividends are one source of return, but they are usually smaller than potential price appreciation. A stock that pays a 2 percent dividend yield but rises 10 percent in price delivers a larger total return than the dividend alone. Conversely, a stock that pays a 5 percent dividend but falls 15 percent in price results in a net loss despite the dividend payment.

Who can buy stocks and how to get your free guide

You buy stocks through a brokerage account — an account with a firm licensed to buy and sell securities on your behalf. Major brokerages include Fidelity, Charles Schwab, E*TRADE, and Interactive Brokers, though many others exist. You open an account by providing personal information, funding it with cash, and then placing buy orders for specific stocks.

Most brokerages now charge zero commission per trade, meaning you do not pay a fee when you buy or sell a stock. Some brokerages offer fractional shares, which means you can buy a portion of a stock if you do not have enough cash for a full share. For example, if a stock costs $500 per share and you have $100, you might be able to buy 0.2 shares.

You can hold stocks in a regular taxable brokerage account, or in tax-advantaged accounts like a 401(k) or IRA if you are saving for retirement. Tax-advantaged accounts have contribution limits and rules about when you can withdraw money, but they reduce the taxes you owe on investment gains.

The risks of owning stocks

Stock prices can fall significantly, and you can lose money. If you buy a stock for $50 per share and it falls to $30, you have lost $20 per share. You recover that loss only if the price rises back above $50, or you accept the loss and sell. There is no may provide a stock will recover.

Companies can also fail. If a company goes bankrupt, shareholders are last in line to receive any remaining assets — creditors and bondholders are paid first. In many bankruptcies, shareholders receive nothing. This is why diversification matters: owning many different stocks reduces the impact of any single company's failure on your overall portfolio.

Market-wide downturns also affect stocks. During recessions or financial crises, most stock prices fall together, regardless of individual company performance. The stock market has experienced several severe declines in the past two decades, including the 2008 financial crisis and the 2020 pandemic shock. Investors who needed their money during these periods and had to sell at low prices suffered real losses.

Stocks versus other investments

Stocks are one of several investment types available to individual investors. Bonds are loans you make to companies or governments; they pay a fixed interest rate and are generally less volatile than stocks but offer lower potential returns. Mutual funds and ETFs are baskets of many stocks or bonds managed by professionals or designed to track an index. REITs are companies that own real estate and distribute rental income to shareholders.

Most investors hold a mix of these types rather than stocks alone. A portfolio might contain 60 percent stocks, 30 percent bonds, and 10 percent other investments. The exact mix depends on your age, how much risk you can tolerate, and when you need the money. Younger investors with decades until retirement often hold more stocks; investors nearing retirement often shift toward bonds and other lower-volatility investments.

Stocks are the highest-risk, highest-potential-return option among these choices. Over very long periods (20+ years), stocks have historically outpaced inflation and other investments, but they are volatile in the short term. If you cannot tolerate seeing your account value drop 20 or 30 percent in a bad year, stocks may not be appropriate for your situation.

How to research stocks before buying

Before buying a stock, you can review publicly available information about the company. Public companies file regular reports with the Securities and Exchange Commission (SEC), including annual reports (Form 10-K) and quarterly earnings reports (Form 10-Q). These documents describe the company's business, financial performance, risks, and management.

You can also look at basic metrics like the price-to-earnings ratio (P/E), which compares the stock price to the company's annual profit per share. A lower P/E might suggest the stock is cheaper, though it could also mean investors expect slower growth. Earnings growth, profit margins, debt levels, and competitive position all matter when evaluating whether a stock is worth buying at its current price.

Most brokerages provide research tools and stock screeners that let you filter companies by these metrics. Financial websites like Yahoo Finance and Morningstar also offer free stock data and analysis. Reading the company's own investor relations materials and earnings call transcripts can give you insight into management's strategy and confidence.

Frequently Asked Questions

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

No, not in a standard brokerage account. If you buy 100 shares at $50 per share and the stock falls to $0, you lose your $5,000 investment but nothing more. The exception is if you use margin (borrowed money) to buy stocks — then losses can exceed your initial cash. Most beginning investors should avoid margin.

Do I have to hold a stock forever?

No. You can sell a stock anytime the market is open by placing a sell order through your brokerage. The sale happens within seconds, and the cash appears in your account within a few days. There is no penalty for selling, though you may owe taxes on any profit you made.

What happens to my stocks if the brokerage goes out of business?

Your stocks are protected. Brokerages hold customer securities in separate accounts, and the Securities Investor Protection Corporation (SIPC) insures up to $500,000 per customer per brokerage if a firm fails. Your stocks remain yours and can be transferred to another brokerage.

How much money do I need to start buying stocks?

Many brokerages have no minimum account balance. You can open an account and buy fractional shares with as little as $1 or $10. However, trading frequently with small amounts means fees and taxes can eat into returns, so most investors benefit from building up larger positions over time.

Should I buy individual stocks or funds?

Individual stocks require research and active decisions; funds let you own many companies with one purchase. Funds are simpler for beginners and reduce risk through diversification, but they charge fees. Many investors use both — a core holding in a low-cost index fund plus a smaller portion in individual stocks they research.