Investing in bonds means lending money to a government, company or other issuer in exchange for agreed payments. Bonds can provide income, help fund future spending and reduce dependence on stock market returns. But fixed income does not mean a fixed account balance.
The useful questions are practical: who owes you the money, when should they repay it, what could interrupt those payments, and what price are you paying? A high interest rate answers none of those questions on its own. All numerical examples below are hypothetical, not current market quotes.
How a bond investment works
A conventional bond has a face value, a maturity date and a coupon rate. Face value is the principal due at maturity. The coupon determines the interest payment, while maturity tells you when the issuer is scheduled to repay the principal.
Suppose you buy a five-year bond with a $2,000 face value and a 5% annual coupon. It pays $100 a year, perhaps as two $50 payments. If the issuer makes every payment and the bond is not redeemed early, you receive $500 in interest over five years and $2,000 at maturity.
That repayment is the face value, not necessarily what you paid. Buying the same bond for $2,100 does not increase its scheduled maturity payment to $2,100.
With an ordinary corporate bond, you are a lender rather than a shareholder. Your contractual payments do not rise simply because the business becomes more profitable. The issuer can also default, so its ability to meet those obligations matters from the outset (SEC investor bulletin on corporate bonds).
Coupon rate, yield and total return are different
The coupon describes the interest relative to face value. Yield relates that income, and sometimes other cash flows, to the price you pay.
Buy the $2,000 bond above for $1,900 and its $100 annual coupon produces a current yield of approximately 5.26%: $100 divided by $1,900. The coupon rate remains 5%. Current yield does not account for the additional $100 you would receive if the issuer repays the full face value at maturity.
Yield to maturity accounts for the purchase price, scheduled interest payments, repayment amount and time remaining. It assumes the promised payments arrive. It is not a guaranteed realized return: taxes, costs, default and the rates available for reinvesting coupons can change your outcome.
For a callable bond, the issuer can repay early under the contract’s terms. Check yield to call and yield to worst, which considers the least favorable contractual redemption outcome without default. “Worst” does not mean the largest possible loss. These distinctions are covered in FINRA’s guide to bond yield and return.
Total return includes income and changes in value. Receiving $100 in interest does not leave you ahead if you then sell the bond for $200 less than you paid.
The main types of bonds
Start with the issuer and payment structure rather than sorting a purchase screen by the highest yield. Different bond categories serve different purposes.
| Bond category | What you own | What to examine |
|---|---|---|
| U.S. Treasury securities | Federal government debt, including bills, notes and bonds | Maturity, yield and price sensitivity if sold early |
| Investment grade corporate bonds | Company debt with stronger credit ratings | Issuer finances, rating changes and repayment terms |
| High yield corporate bonds | Lower rated company debt | Greater default risk and whether the yield compensates for it |
| Municipal bonds | Debt from state and local governments or related issuers | Repayment backing, issuer finances, tax treatment and call provisions |
| Treasury Inflation-Protected Securities | U.S. government debt with inflation-adjusted principal | Purchase price, real yield and the intended holding period |
Treasury Inflation-Protected Securities, or TIPS, adjust principal using a consumer price index. Their fixed coupon rate applies to that adjusted principal, so the dollar interest payment changes. At maturity, Treasury pays the inflation-adjusted principal or original principal, whichever is greater, under the Treasury’s TIPS payment terms.
That maturity protection does not guarantee recovery of every price paid in the secondary market. It also does not prevent a loss if you sell before maturity. Inflation protection and price stability are different things.
Why bond prices fall when interest rates rise
When market yields rise, an existing fixed coupon becomes less attractive. Its price generally falls until the remaining payments offer a yield that buyers will accept. Falling market yields generally have the opposite effect.
The relevant comparison is with yields on similar bonds, not just the Federal Reserve’s latest policy decision. Changes in the issuer’s creditworthiness can also move its price.
Duration estimates sensitivity to yield changes. A bond or fund with a duration of six would, approximately, lose 6% in price if its relevant yield rose by one percentage point, with other factors unchanged. On a $10,000 holding, that is roughly $600 before income. The estimate becomes less precise for larger movements or changing cash flows (FINRA’s explanation of interest rates and duration).
Maturity and duration are not interchangeable. Maturity is a repayment date; duration is a sensitivity measure. Holding an individual bond to maturity can avoid having to sell at a depressed price, but it does not remove default risk, inflation or the opportunity cost of being locked into a lower coupon.
The risks beyond interest rates
Credit risk concerns the issuer’s ability to pay. A downgrade can reduce a bond’s market value even without a missed payment. A credit rating is an assessment, not insurance. Before buying company debt, consider cash generation, existing borrowing and how the business would cope with weaker trading conditions.
Avoid letting one borrower dominate the bond portion of your portfolio. Buying several bonds from the same company does not spread issuer risk. The broader principles of diversification and concentration risk apply to lending as much as share ownership.
Inflation risk affects what fixed payments can buy. Receiving the promised dollars is not the same as preserving purchasing power. Reinvestment risk arises when coupons or repaid principal must be invested at lower yields. An early call can bring that problem forward.
Liquidity risk matters when you need to sell. A bond may trade infrequently, and the price a buyer actually offers can differ from the estimated value shown in your account. Do not assume every individual bond is easy to turn into cash at a reasonable price.
Individual bonds versus bond funds and ETFs
Individual bonds give you control over issuers, maturity dates and scheduled payments. That can be useful when matching an investment to a known expense. The trade-off is the work involved in researching borrowers, spreading holdings and reinvesting repayments.
A bond mutual fund or exchange-traded fund pools investors’ money into a portfolio of debt. Funds can simplify ownership, but the label alone tells you little about safety. Their holdings may carry credit, interest rate and early repayment risks, including funds that own government securities (SEC overview of bond fund risks).
Most conventional bond funds continually replace holdings rather than returning a fixed face value to you on a personal maturity date. Your eventual proceeds depend on the value of your shares when you sell. A fund’s income payments can change too. Treat its stated yield as a measure to investigate, not a promised return.
Compare funds using their duration, credit quality, holdings, fees and yield calculation date. Check whether the portfolio matches the purpose you have assigned it. The differences between fund structures and trading arrangements are covered separately in index funds and ETFs explained.
Match bonds to the spending they need to support
Start with the money’s job. Funding tuition in three years is a different task from maintaining a bond allocation throughout retirement. A long maturity bond should not become the default choice simply because its quoted yield looks attractive.
For a known expense, consider how scheduled principal and interest payments line up with the payment date. Leave room for uncertainty: spending can arrive earlier than expected, and some bonds can be called before their stated maturity.
A bond ladder spreads maturities across several dates. As a hypothetical structure, five holdings might mature in one, two, three, four and five years. Each repayment can fund spending or be reinvested. This staggers reinvestment decisions rather than placing them all on one date, but does not eliminate losses or guarantee better returns.
Deciding how much of your total portfolio belongs in bonds is a separate asset allocation decision. Choose the allocation before choosing products to fill it.
How to buy bonds and check the costs
New Treasury securities can be purchased at auction through TreasuryDirect or a bank, broker or dealer. TreasuryDirect uses noncompetitive bids: you accept the rate or yield established at auction rather than selecting it yourself. Its minimum bid for marketable securities is $100, with purchases in $100 increments (TreasuryDirect purchase rules).
Corporate and municipal bonds can be purchased through brokers, either as new offerings or in the secondary market. Compare the actual security, not just the issuer’s name. One company can have several bonds with different maturities, payment priorities and call terms.
Check the total settlement amount. A quote of 98 means 98% of face value: $1,960 for $2,000 of principal, before accrued interest and any separately charged fees. Accrued interest compensates for interest earned before the purchase; it is not an extra coupon windfall.
With municipal bonds, dealer markups may be included in the price, while fund and advisory charges can create ongoing costs (MSRB guide to municipal bond purchases). Ask what compensation is embedded in the quote and whether the displayed yield reflects your actual purchase costs.
Before confirming an order, verify the issuer, security identifier, maturity, call schedule, yield and amount payable. If you might sell early, check how that sale would work through the account you intend to use.
Compare returns after tax
For U.S. investors holding bonds in taxable accounts, corporate bond interest is generally taxable. Interest from Treasury bills, notes and bonds is subject to federal income tax but exempt from state and local income taxes. Municipal bond interest is generally exempt from federal income tax, with exceptions. Tax-exempt interest does not automatically make every gain on the investment tax free (IRS Publication 550 on investment income).
A tax-equivalent yield can help compare a qualifying municipal bond with a taxable alternative. Divide the exempt yield by one minus the applicable marginal tax rate.
For example, a 3.6% federally tax-exempt yield has a federal tax-equivalent yield of approximately 4.74% at a hypothetical 24% marginal rate: 3.6% divided by 0.76. This simplified comparison ignores state taxes, other tax effects and differences in credit quality, maturity or call provisions.
Compare like with like. A tax advantage does not make a weaker borrower safer, and a higher after-tax yield does not compensate automatically for a holding period that conflicts with your spending needs. Retirement account treatment can also change the comparison.
Choose the obligation, not just the income
Before investing, be able to explain who will repay you, when the money should arrive, what could change that schedule and how you would exit early. Then compare yield after costs and tax. If the purchase only makes sense because it offers the highest displayed rate, the assessment is not finished.