What Are Corporate Bonds? How to Buy and Invest in Them

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A corporate bond is a debt security a company issues to borrow money from investors. The buyer lends the company a set amount, usually receives interest payments on a fixed schedule, and is owed the principal (face value) back on the maturity date. The bondholder is a creditor, not an owner: the return depends on the company’s ability to keep paying, not on its profits growing.

How Corporate Bonds Work

Every corporate bond is defined by a few terms set at issuance:

• Face value (par): the amount the company repays at maturity, typically $1,000 per bond.
• Coupon rate: the annual interest rate applied to face value. It can be fixed for the life of the bond or floating, resetting with a benchmark rate or other economic indicator.
• Payment schedule: how often interest is paid. Semiannual payments are common, but monthly, quarterly and annual schedules exist. Bond funds often distribute income monthly even when their holdings pay semiannually.
• Maturity date: when the principal is due. Maturities range from a few years to several decades.
• Security and seniority: most corporate bonds are backed only by the company’s ability to generate cash. Some are secured by specific assets, which gives holders a claim on those assets if the company defaults.
• Call provision: a callable bond lets the issuer repay it early, usually after a set date. Companies tend to use this when interest rates fall, so they can refinance at a lower cost. The investor gets principal back sooner but loses the remaining higher coupons.

Some bonds add other features. Convertible bonds can be exchanged for the company’s shares if certain conditions are met. Income bonds, sometimes issued by companies in financial distress or reorganization, pay interest only if the company earns enough, which is why they usually offer above-average rates.

Calculating Corporate Bond Payments

The coupon payment follows directly from the bond’s terms:

Annual interest = Face value × Coupon rate

Each payment = Annual interest ÷ Number of payments per year

Hypothetical example: a company issues a 10-year bond with a $1,000 face value and a 5% fixed coupon, paid semiannually.

• Annual interest: $1,000 × 5% = $50
• Each semiannual payment: $50 ÷ 2 = $25
• Total coupons over 10 years: $25 × 20 payments = $500
• At maturity, the investor also receives the $1,000 face value.

Interpreting Corporate Bond Prices and Yields

The coupon is fixed in dollars, but the bond’s market price is not. After issuance, bonds trade in the secondary market, and their prices move inversely to interest rates. If new bonds of similar quality start paying 6%, nobody will pay full price for a bond paying 5%, so its price falls until its yield is competitive. If rates drop, the older, higher coupon becomes more valuable and the price rises.

Continuing the hypothetical example: if the 5% bond trades at $950, its current yield is $50 ÷ $950 = 5.26%. The buyer also gains $50 if the bond is held to maturity and repaid at $1,000, which current yield ignores. Yield to maturity captures both the coupons and that price difference, assuming all payments are made and reinvested at the same rate, so it is the better figure for comparing bonds with different prices and coupons.

Corporate Bond Ratings

Before a bond is sold, one or more rating agencies assess the issuer’s creditworthiness. The three major agencies in the U.S. are S&P Global Ratings, Moody’s Investors Service and Fitch Ratings. Each uses its own scale, but the top grade is commonly called “triple-A.”

Ratings divide the market into two broad groups:

• Investment grade: BBB- or higher at S&P and Fitch, Baa3 or higher at Moody’s. These issuers are judged more likely to meet their obligations.
• High yield (junk): anything below those levels. These bonds pay higher coupons to compensate investors for a greater chance of missed payments or default.

Ratings affect what a company pays to borrow and which investors can buy its debt. A downgrade after issuance usually pushes a bond’s price down, because the market demands a higher yield for the added risk. A rating is an opinion about default risk; it does not measure interest rate risk or guarantee repayment.

How Corporate Bonds Are Issued and Traded

A company usually hires an investment bank to underwrite the offering: structure the terms, set the price and sell the bonds to investors. Large institutions buy much of a new issue, and individual investors can sometimes buy new issues through their broker.

After issuance, corporate bonds trade mainly over the counter through dealers rather than on a central exchange. Prices can differ between dealers, and the price an investor pays may include a dealer markup. In the U.S., FINRA’s TRACE system publishes reported corporate bond trades, which lets investors see recent transaction prices.

How to Buy Corporate Bonds

There are two main routes:

1. Individual bonds through a brokerage account. Many brokers let you filter bonds by issuer, rating, maturity and yield. You receive the stated coupons and, if you hold to maturity and the issuer does not default, the face value. Unless you buy many issues, your credit risk is concentrated in a few companies.
2. Bond mutual funds and ETFs. A fund holds hundreds or thousands of bonds, spreading issuer risk and allowing small investments. A bond ETF trades on an exchange during the day, while a mutual fund prices once daily at its net asset value. Funds have no single maturity date, so there is no guaranteed return of principal on a set day, and the fund’s price moves with rates continuously.

Before buying, compare yield to maturity rather than coupon alone, check the rating and whether the bond is callable, and match the maturity to when you will need the money.

Why Companies Issue Bonds

Companies raise capital through equity (selling shares), bank loans, lines of credit and bonds. Bonds are debt financing, often used to fund expansion, capital projects, acquisitions or the refinancing of existing debt. Debt lets a company raise money without giving up ownership or control, and interest is often cheaper than the cost of equity. The stronger a company’s perceived credit quality, the more it can borrow and the lower the rate. For needs of a few weeks or months, companies issue commercial paper, short-term unsecured debt that typically matures in 270 days or less.

Corporate Bonds vs. Stocks

A bondholder lends money; a stockholder owns part of the company. Stock returns come from price changes and any dividends, and they rise or fall with the company’s fortunes. Bond returns come mainly from contractual interest, and the upside is capped at the coupons plus face value.

Priority also differs. If a company goes bankrupt, creditors, including bondholders, are paid before shareholders, who receive anything only after debts are settled. Bondholders can still lose money in a default if assets fall short, but they stand ahead of equity in line.

Corporate Bonds vs. Treasury Bonds

Treasury bonds are backed by the U.S. government, which investors treat as having very low default risk. Corporations are more likely to default, so their bonds typically pay higher yields than Treasuries of similar maturity. The difference, called the credit spread, is wider for lower-rated issuers.

Taxes differ too. Treasury interest is exempt from state and local income tax, while corporate bond interest is generally taxable at the federal, state and local levels. The choice depends on how much credit risk you will accept for the extra yield and on your tax bracket.

Limitations of Corporate Bonds

• Credit and default risk: the issuer can miss payments or fail entirely.
• Interest rate risk: rising rates lower the market value of existing bonds, and longer maturities are more sensitive.
• Inflation risk: fixed coupons lose purchasing power when inflation runs higher than expected.
• Liquidity and pricing: many individual issues trade infrequently, and dealer markups can make small trades costly.
• No deposit insurance: corporate bonds are securities, not bank deposits, so FDIC coverage does not apply.

FAQs

The Bottom Line

Corporate bonds suit investors who want contractual interest income and are willing to take on credit risk for yields above Treasuries. Compare yield to maturity instead of coupon alone, check the rating and any call provision, and match the maturity to when you need the money. A fund spreads issuer risk across many bonds, but it has no set maturity date, so principal is not returned on a fixed day.