Corporate Bonds, Types, and Market Size

Corporations are issuing bonds at a record clip

Corporate team meeting

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Corporate bonds are issued by companies to raise more capital. Companies use the money to reinvest in their operations, buy other companies, or even pay off older, more expensive loans.

In January 2018, there was $37 billion in corporate debt traded per day. That grew to $44.7 billion in total volume in March of 2021. Companies want to issue debt before the Federal Reserve raises interest rates further.

The alternative for companies is to engage in an initial public offering and raise equity by selling stocks. This is a long and expensive procedure. Selling bonds, while still complicated, is easier. It's a quicker way to raise capital for corporate expansion.

Key Takeaways

  • Corporate bonds are a type of debt issued by companies and sold to investors in order to raise capital for the business.
  • They represent a quicker, easier way to raise capital than to release stocks for purchase.
  • Unlike stocks, bonds offer.a fixed interest rate if the purchaser holds them to full maturity.
  • Investors should evaluate corporate bonds in terms of duration, risk, and type of interest rate offered.

US Bond Trading Volume

The graph below illustrates the U.S. Bond trading volume from 1996-2019, broken down by treasurys, mortgage-backed securities, corporate debt, municipal bonds, and federal agency securities.

Corporate Bonds

You can buy corporate bonds individually or through a bond fund from your financial advisor. They are less safe than government bonds. There is a greater chance the company can go bankrupt and default on the bond. They are rated according to their risk by Moody's or Standard & Poor's. The higher the risk, the higher the return the corporation must offer. 

Corporate bonds, like all other bonds, offer a fixed interest rate to the bond purchaser. If you hold the bond to maturity, you will receive the principal plus the sum of all the interest paid. That's your total return or yield.

But if you sell the bond before maturity, you may not get the same price back that you paid for it. The value of your bond will drop if interest rates on other bonds go up. Why would someone pay you the same if your bond has a lower interest rate than the others that are available? In that case, your total return or yield will drop. That's why they always say bond yields fall when interest rates rise.

Types of Corporate Bonds

There are many different types of corporate bonds, depending on their risk and return.


The first category is the duration. This refers to how long it will take for the bond to mature. There are three lengths of duration:

  • Short-term: Set to mature in three years or less, these bonds used to be considered the safest, because they were held for less time. But in 2015, the Fed began raising interest rates. That means some of those bonds will depreciate in value. 
  • Medium-term: Rates will probably rise on these bonds as well over the next year, as the Fed tapers off its purchases of U.S. Treasury notes. The term on these bonds is four to 10 years. The Fed purchases these when they see the need to stimulate the economy through quantitative easing.
  • Long-term: Longer-term bonds, with terms of more than 10 years, offer higher interest rates because these tie up lenders’ money for a decade or more. This makes the yield, or overall return, more sensitive to interest rate movements. These bonds are sold with a call, or redemption provision. Longer-duration bonds allow the issuing company to redeem them after the first 10 years if interest rates are lower. That allows them to pay off your bond with funds from a new, cheaper bond.


The second category is risk, which can be broken down in two ways.

Investment-grade bonds are issued by companies that are unlikely to default. Most corporate bonds are investment grade. These are attractive to investors who want more return than they can get with Treasury notes. These corporate bonds are really still quite safe. These are rated at least Baa3 by Moody’s and at least BBB- by Standard & Poor’s and Fitch Ratings.

High-yield bonds, also known as junk bonds, offer the highest return. But they are the riskiest. In fact, the rating of "not investment grade" should scare you. These are considered downright speculative. These bonds rate a B or lower.

Interest Payment

The third category is the type of interest payment. There are four possibilities.

  • Fixed-rate, also called plain vanilla, are the most common. You will receive the same payment each month until maturity. These are called coupon payments. The interest rate is called the coupon rate. Back in the old days, investors actually had to clip the coupons on the paper bond and send them in to get paid. Now, of course, it's all done electronically.
  • Floating-rate bonds reset their payments periodically, every six months. The payments will change based on the prevailing interest rates of Treasurys.
  • Zero-coupon bonds withhold interest payments until maturity. The investor must pay taxes on the accrued value of the interest payment, just as if they were being paid.
  • Convertible bonds are like plain vanilla bonds, but these allow you to convert them to shares of stock. If stock prices rise, the value of the bonds will increase. If stock prices fall, you still have the bond coupons and the original bond value if you hold until maturity. Since these bonds have this added advantage, they pay lower interest rates than plain vanilla bonds.

Article Sources

  1. U.S. Securities and Exchange Commission. "Investment-Grade Bond (or High-Grade Bond)."

  2. U.S. Securities and Exchange Commission. "High-Yield Bond (or Junk Bond)."