Bond vs Stock (Equity)
Bond and Stock (Equity) are two Money, Banking & Finance concepts in AP Economics that students often mix up. A bond is a debt security in which an investor lends money to a government or company in exchange for periodic interest and repayment at maturity. A stock is a share of ownership in a company, giving the holder a claim on part of its assets and profits. Here is how they compare side by side.
Bond prices and interest rates move in opposite directions: when rates rise, existing bond prices fall. Central banks buy and sell government bonds in open market operations to change the money supply. Bonds are generally lower-risk than stocks.
Companies issue stock to raise financial capital. Shareholders may earn returns through dividends and rising share prices. Stocks are riskier than bonds but historically offer higher average returns.
Bonds vs Stocks: Two Different Claims on the Same Company
| Bond | Stock (Equity) | |
|---|---|---|
| Best case for the holder | Capped at the coupon stream and the face value, however well the issuer performs | Uncapped, since a residual claim grows with every extra dollar the firm earns |
| Payment | A fixed coupon the issuer must pay or else default | A dividend the board can cut or skip in any year |
| If the issuer fails | Paid before shareholders out of whatever the assets fetch | Paid last, and usually receives nothing |
| Term | Ends on a stated maturity date, when the face value is repaid | Has no maturity and lasts as long as the company does |
| Control | No vote on how the company is run | Voting rights on directors and major decisions |
| Link to interest rates | Price moves inversely with market interest rates by arithmetic, since the coupon cannot change | Price responds only indirectly, through expected profits and the rate used to discount them |
| Role in AP Macroeconomics | Central to open market operations, the money market, and loanable funds | Background only, as one form in which households hold wealth |
The inverse link between price and interest rate belongs to bonds alone
Take a bond that pays $5 every year indefinitely and sells for $100. Its yield is $5 divided by $100, or 5 percent. Now suppose newly issued bonds of the same risk pay 10 percent. Nobody will pay $100 for a $5 stream when $100 elsewhere buys $10 a year, so the price of the older bond falls until its fixed coupon delivers a competitive return. At a price of $50, that $5 coupon is a 10 percent yield, and the two bonds are equally attractive. The coupon never changed. Only the price moved, and it moved because the coupon could not. Stocks carry no such arithmetic, since a company facing higher interest rates might cut its dividend, raise it, or leave it alone, so the share price responds through expectations rather than through a fixed numerator. That difference is why open market operations run through bonds. A central bank buying bonds knows which way the yield moves before the trade settles.
The repayment order explains the price of the risk
A failed company does not hand everyone a share of what is left. Claims are settled in order. Suppose a firm is liquidated, its assets fetch $60 million, and bondholders are owed $70 million. Bondholders divide the whole $60 million and recover about 86 cents on the dollar, while shareholders receive nothing, because equity is the residual claim on whatever survives after debts are settled. That ordering is why a bond from a given company offers a lower expected return than the same company's stock. Investors are not being generous, they are accepting less because they carry less risk. The ordering explains the issuer's side too. Interest is a contractual obligation that must be paid in a bad year, so borrowing makes profits swing harder, while a new share issue imposes no fixed payment but dilutes the ownership of existing shareholders. A firm choosing between a bond issue and a share issue is trading fixed risk against surrendered control.
AP Macroeconomics leans on bonds and barely touches stocks
Bonds carry real weight in the course. The central bank buys and sells government bonds to change the money supply, a bond purchase pushes bond prices up and interest rates down, and a higher real interest rate raises the quantity of loanable funds supplied while reducing the quantity demanded. Bonds are also the standard interest-bearing asset in a money demand question, where a higher interest rate raises the opportunity cost of holding cash and pushes households toward bonds. Stocks appear mainly as one category of financial asset a household can hold. No standard graph in the course puts a share price on an axis, and no policy chain runs through the stock market. When a question mentions the stock market, it is usually setting a scene, such as a fall in household wealth that cuts consumption and shifts aggregate demand left. Answer that one through the wealth effect on consumption, not through equity valuation.
Frequently asked questions
Why do bond prices fall when interest rates rise?
Bond prices fall when interest rates rise because the coupon is fixed at issue and cannot follow the market up. A bond paying $8 a year is worth $200 while the going rate is 4 percent, since $8 divided by $200 is 4 percent. Let the going rate double to 8 percent and that same $8 stream is worth only $100, because a buyer with $100 could get $8 a year from a newly issued bond instead. Nothing about the issuer has to change for the price to fall. How far it falls depends on how many payments the bond still has left, since a longer bond has more of its value exposed to the new rate.
Are bonds always safer than stocks?
Bonds from a given issuer are safer than that issuer's stock, because bondholders are paid first and their payment is contractual rather than discretionary. Across different issuers the ranking can flip. A bond from a struggling company can be riskier than a share in a stable one, and even a government bond with no default risk loses market value when interest rates rise, which is a genuine loss for anyone who sells before maturity. Safety depends on the issuer and the holding period, not on the label.
Does the Federal Reserve buy stocks?
The Federal Reserve conducts open market operations in government bonds, not in corporate stock. Buying bonds credits reserves to banks and pushes bond prices up and interest rates down, which is the transmission channel a free-response question asks you to trace. A rubric asking for an open market operation wants the bond purchase named, so writing that the central bank prints money, buys shares, or lends directly to firms can cost the point even when the direction of the final answer is right.
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