The core difference: ownership versus lending
When you buy a stock, you own a piece of a company. When you buy a bond, you lend money to a company or government and they promise to pay you back with interest. That distinction shapes everything else about how they work, what they cost you, and what you stand to gain or lose.
A stock gives you a claim on the company's future earnings and assets. If the company does well, the stock price typically rises and you can sell it for more than you paid. If the company struggles, the stock price falls. You also might receive dividends—small cash payments the company distributes to shareholders—but you're not may provide anything.
A bond is a debt instrument. The company or government issuing the bond has borrowed money from you and committed to repay it on a specific date, called the maturity date. In the meantime, they pay you interest, usually twice a year. That interest rate is set when you buy the bond and doesn't change, even if market conditions shift.
Key Takeaways
- Stocks represent ownership in a company; bonds represent a loan you make to a company or government that they repay with interest.
- Stock prices fluctuate based on company performance and market sentiment, while bond prices are more stable but still move when interest rates change.
- Stocks offer the potential for higher returns over time but come with greater risk; bonds offer predictable income with lower risk.
- If a company fails, bondholders get paid before stockholders, making bonds a safer position but with lower upside.
- Most long-term investors hold both stocks and bonds to balance growth potential with stability.
How stock prices move and what drives them
Stock prices change constantly during trading hours based on what buyers and sellers think the company is worth right now. If a company announces strong earnings, the stock often rises because investors expect future profits. If the company misses expectations or faces bad news, the stock typically falls.
You make money on stocks in two ways: capital appreciation (the stock price goes up) and dividends (the company pays you a share of profits). You lose money if the stock price drops below what you paid for it. There's no may provide return, and you could lose your entire investment if the company goes bankrupt.
Stock volatility—the degree to which prices swing up and down—varies by company and industry. A large, established utility company's stock might move slowly and predictably. A new technology company's stock might swing 10 percent in a single day. This unpredictability is why stocks are considered higher-risk investments.
How bond prices and interest rates work together
When you hold a bond until maturity, you receive all your money back plus the agreed-upon interest. That predictability is a major reason people buy bonds. However, bond prices do move if you try to sell before maturity, and the movement is tied directly to interest rates.
Here's the mechanism: if you own a bond paying 3 percent interest and new bonds are issued paying 5 percent, your bond becomes less attractive. If you want to sell it, you'll have to accept a lower price to compensate the buyer for the lower interest rate. Conversely, if new bonds pay only 2 percent, your 3 percent bond becomes more valuable and you could sell it for more than you paid.
The credit quality of the issuer also matters. A bond from a stable government or a financially strong company is less risky than a bond from a struggling company. Riskier bonds pay higher interest rates to compensate investors for the greater chance of default—the issuer failing to repay.
Risk and return: what you're trading off
Stocks historically deliver higher average returns over long periods—typically 7 to 10 percent annually over decades—but with significant year-to-year swings. Some years stocks gain 20 percent; other years they lose 30 percent. If you need your money in five years, that volatility matters more than if you need it in thirty.
Bonds typically return less—often 3 to 5 percent annually depending on the type and credit quality—but with much smaller price swings. You know roughly what you'll receive if you hold to maturity. This makes bonds suitable for money you'll need soon or for investors who can't tolerate large losses.
The trade-off is simple: higher potential returns come with higher risk. Lower risk comes with lower returns. Most investors don't choose one or the other; they hold both, adjusting the mix based on their age, goals, and how much risk they can stomach.
What happens if the company fails
When a company goes bankrupt, there's a legal order for who gets paid first. Bondholders stand ahead of stockholders. The company's assets are sold and the proceeds go first to bondholders (starting with secured bondholders, then unsecured), then to preferred stockholders, then to common stockholders. Stockholders often get nothing.
This priority is why bonds are considered safer. You're less likely to lose your entire investment. However, even bondholders may not recover 100 percent if the company's assets don't cover all debts. Stockholders, by contrast, can lose everything but their downside is capped at their initial investment.
Different types of stocks and bonds
Stocks come in different sizes and styles. Large-cap stocks are shares in big, established companies. Small-cap stocks are shares in smaller companies with more growth potential but also more volatility. Growth stocks are companies expected to expand rapidly; value stocks are companies trading below what analysts think they're worth.
Bonds also vary widely. Government bonds (Treasury bonds, issued by the U.S. government) are considered very safe because the government can print money to repay them. Corporate bonds are issued by companies and carry more risk. Municipal bonds are issued by states and cities and often have tax advantages. High-yield bonds (sometimes called junk bonds) pay high interest rates because the issuer is risky.
Within each category, you can buy individual securities or funds that hold many of them. A stock mutual fund or exchange-traded fund (ETF) holds dozens or hundreds of stocks, spreading your risk. A bond fund works the same way.
How most people actually use stocks and bonds
Few individual investors pick individual stocks and bonds. Most hold them through funds—mutual funds or ETFs—that do the picking for you. A target-date fund automatically adjusts its mix of stocks and bonds as you age, holding more stocks when you're young and shifting toward bonds as you approach retirement.
A common approach for long-term investors is a simple split: 60 percent stocks and 40 percent bonds, or some variation based on risk tolerance. Younger investors often tilt more heavily toward stocks because they have decades to recover from downturns. Retirees often hold more bonds because they need stable income and can't wait out a market crash.
The key insight is that stocks and bonds behave differently under different conditions. When stocks fall, bonds often hold steady or rise. This inverse relationship is why holding both smooths out your overall returns and reduces the chance of a catastrophic loss at the wrong time.
Frequently Asked Questions
Can I lose money on a bond?
Yes, in two ways. If you sell before maturity and interest rates have risen, you'll receive less than you paid. If the issuer defaults, you may not get all your money back. However, if you hold a bond to maturity and the issuer doesn't default, you'll receive your full principal plus all promised interest.
Why would anyone buy stocks if bonds are safer?
Because stocks historically return more over long periods. If you need your money in 30 years, the higher average return of stocks outweighs the short-term volatility. Bonds are better for money you'll need soon or for reducing overall portfolio swings.
What's the difference between a stock and a stock fund?
A stock is a single company's share. A stock fund holds shares in many companies, spreading your risk. If one company fails, it's a small part of your fund. Most investors use funds rather than individual stocks because the diversification reduces the impact of any single company's problems.
Do I have to pick between stocks and bonds?
No. Most investors hold both. The mix depends on your age, goals, and risk tolerance. A common starting point is 60 percent stocks and 40 percent bonds, but younger investors often hold more stocks and older investors often hold more bonds.
What happens to my bond if the company is bought by another company?
Usually your bond continues unchanged. The new owner inherits the debt obligation and must honor the terms. However, read the bond's terms—some bonds have clauses allowing early repayment if ownership changes, which could affect your return.