A stock is a piece of ownership in a company. When you own a share of stock, you own a small part of that company, not just a number on a screen, but a legal claim on a fraction of its assets and future earnings.
Stocks are also called equities. People buy them hoping the company becomes more valuable, pays dividends (cash from company profits), or both.
How Stocks Can Make Money
Stocks can make money in two main ways.
First, the price can rise. If you buy a stock for $50 and later sell it for $70, the $20 difference is a gain before taxes and fees.
Second, some companies pay dividends. A dividend is a cash payment to shareholders from company profits. Not all companies pay them, and they can be reduced or stopped at any time. A company might pay a dividend quarterly, say, $0.50 per share every three months. If you own 100 shares, that is $50 every quarter just for holding the stock. But if the company hits hard times, dividends can be cut or eliminated with little notice.
Why Stock Prices Move
Stock prices move because buyers and sellers disagree about what the company is worth.
Prices can change because of:
- Company earnings reports (better or worse than expected)
- New products or services
- Interest rate changes by the Federal Reserve
- Competition from rival companies
- Investor expectations about future growth
- Economic news like inflation or unemployment data
- Fear, excitement, or speculation
A good company can still see its stock price fall if investors expected more. A company might report record profits, but if Wall Street was expecting even higher profits, the stock can still drop. This is sometimes called “sell the news.”
Common Stock vs Preferred Stock
Common stock is what most people mean when they talk about stocks. It typically comes with voting rights on major company decisions (like electing the board of directors) and may include dividends if the company chooses to pay them.
Preferred stock is different. It often pays a fixed dividend and gives preferred shareholders priority over common shareholders when the company distributes profits or assets. But preferred stockholders usually have little or no voting power. Think of it as a middle ground between a common stock and a bond.
Most people encounter stocks through funds rather than buying individual companies one by one. If you want to understand how pooled investments work, see What Is An ETF? or What Is An Index Fund?.
The Main Risk
Stocks can lose value. If a company performs badly or investors lose confidence, the price can fall sharply, sometimes by 50% or more. In a bankruptcy, common stockholders are near the back of the line, behind creditors and preferred shareholders. You could lose everything you invested in that company.
This is why many people use diversified funds instead of concentrating money in one company. Spreading across many stocks doesn’t eliminate risk, but it means one company’s failure won’t wipe out your entire portfolio.
Stock vs Stock Fund
Buying one stock means betting on one company. If that company struggles, your investment suffers directly.
Buying a stock fund means owning pieces of many companies through a single fund. A broad stock fund might hold hundreds or thousands of individual stocks. Funds can still lose money, but they reduce the risk of one company ruining the whole plan. To understand how this works in practice, see What Is A Mutual Fund?.
Stocks vs Bonds: A Quick Comparison
| Stocks | Bonds | |
|---|---|---|
| What you own | Partial ownership in a company | A loan to a company or government |
| Income | Dividends (optional, not guaranteed) | Regular interest payments (coupon) |
| Growth potential | Higher, can grow with the company | Lower, capped at the interest rate |
| Risk | Higher, price can drop sharply | Generally lower, but still has risk |
| If company fails | Common shareholders paid last | Bondholders paid before stockholders |
| Best for | Long-term growth goals | Income, stability, shorter horizons |
For a deeper look at the other side of this table, see What Is A Bond?.
Frequently Asked Questions
Q: Can you lose all your money in stocks?
Yes. If you own stock in a single company that goes bankrupt, you can lose the full amount you invested, this is why it’s generally smarter to spread your money across many companies rather than concentrating in one. A broad index fund holds hundreds of companies, so one failure has a much smaller impact.
Q: Do you need a lot of money to buy stocks?
Not anymore. Many brokerages let you buy fractional shares, meaning you can invest $5 or $10 in a company whose full shares cost hundreds of dollars. That said, having an emergency fund and paying off high-interest debt before investing is usually the smarter first step.
Q: How are stocks different from mutual funds and ETFs?
A single stock represents one company. A mutual fund or ETF pools many stocks (and sometimes bonds) into one fund you can invest in. Funds give you built-in diversification. See What Is A Mutual Fund? and What Is An ETF? for more.
Q: What does it mean when stocks are “up” or “down”?
When people say the stock market is up or down, they usually mean a major index, like the S&P 500 or Dow Jones Industrial Average, moved higher or lower that day. That doesn’t mean every individual stock moved the same direction. Your specific stocks or funds could behave differently from the overall market.