What are bonds, and how do they differ from stocks?

A bond is a loan. When you buy a bond you are lending money to the issuer — a government or a company — which promises to pay you regular interest and return the principal on a set date. Where a stock makes you a part-owner, a bond makes you a lender.

Stocks vs. bonds: the core trade-off

A stockholder shares in unlimited upside if the company thrives but can be wiped out if it fails. A bondholder's return is capped at the agreed interest, but they sit ahead of stockholders if the issuer gets into trouble, so the outcome is usually steadier. As a rough, long-run generalization, stocks have offered higher returns with bigger swings, and high-quality bonds lower returns with smaller swings — which is why a portfolio often holds both.

Why bonds cushion a portfolio

High-quality government bonds have often held up — or even risen — during stock-market falls, giving them a low or negative correlation to stocks over many periods. That is exactly the property that makes them useful in asset allocation: the bond portion can soften the ride when stocks fall. This cushioning is a tendency, not a law — there have been stretches when stocks and bonds fell together.

Bonds are not risk-free

Two real risks matter. Interest-rate risk: when prevailing rates rise, existing bonds paying lower rates fall in price. Credit (default) risk: a shakier issuer might not pay you back, which is why lower-rated bonds must offer higher interest — the same idea behind a credit spread. Bonds reduce a portfolio's swings; they do not eliminate risk.

Frequently asked questions

What is a bond in simple terms?

A bond is a loan you make to a government or company. In return they pay you regular interest and repay the original principal on a set maturity date. You are a lender, not an owner.

How are bonds different from stocks?

A stock makes you a part-owner with unlimited upside but full downside; a bond makes you a lender with a capped return but a steadier, higher-priority claim if the issuer struggles.

Are bonds risk-free?

No. Bond prices fall when interest rates rise (interest-rate risk), and a weak issuer may default (credit risk). Bonds reduce a portfolio's swings but do not remove risk entirely.