Fixed Income Fundamentals: Understanding Bonds
When people think about investing, stocks often come to mind first. They tend to attract the headlines, whether markets are reaching new highs or experiencing sharp declines. But stocks are only one part of the investment world.
Bonds, often referred to as fixed-income investments, play an important role in many investment portfolios. They can provide income, help manage portfolio volatility, and offer investors a different way to put their money to work.
Yet for many investors, bonds remain something of a mystery. How do they generate income? And if they are generally considered less risky than stocks, why can their values sometimes fall?
Understanding the fundamentals is a good place to start.
What Exactly Is a Bond?
At its simplest, a bond is a loan. When you purchase a stock, you are buying a small ownership stake in a company. When you purchase a bond, you are lending money to an organization, such as a corporation, government, or municipality.
In exchange, the borrower (known as the issuer) agrees to repay the money according to the bond's terms. Many bonds also pay interest at regular intervals.
For example, a company might raise money by issuing bonds to investors. The company receives the funding it needs, while investors receive the contractual promise of interest payments and repayment of principal, subject to the issuer's ability to meet its obligations.
How Does a Bond Work?
Let's look at a simplified example. Imagine you purchase a newly issued bond with the following terms:
Face Value (Principal): $1,000
Coupon Rate (Interest Rate): 4% annually
Maturity: 5 years
Interest Payments: Every six months
Assuming you purchase the bond at face value, you would invest $1,000 and receive $40 in annual interest, paid as two $20 payments. At the end of five years, the bond matures, and the issuer repays the $1,000 principal, provided it meets its obligations. Over those five years, you would have received $200 in interest, plus your original $1,000 investment back.
This illustrates the basic structure of a traditional fixed-rate bond. Three terms are especially important:
Face Value: The amount the issuer promises to repay at maturity.
Coupon: The interest rate applied to the bond's face value. For a traditional fixed-rate bond, this generally remains unchanged throughout its life.
Maturity: The date when the issuer is scheduled to repay the principal.
Coupon Rate vs. Yield: What's the Difference?
One important distinction in bond investing is the difference between a bond's coupon rate and its yield. The coupon tells you how much interest the bond pays relative to its face value. But bonds can be bought and sold after they are issued, and their prices can change.
For example, a bond originally issued with a 4% coupon may later trade above or below its face value. The bond still pays the same contractual interest, but the new investor's return will differ because they paid a different price. This is where yield becomes important.
Yield helps investors evaluate returns based on the price they pay. One commonly used measure, yield to maturity, considers the purchase price, interest payments, time remaining until maturity, and amount expected to be repaid.
Understanding yield helps investors compare bonds with different prices, coupons, and maturity dates.
Why Do Bond Prices Change?
A common misconception is that bonds maintain a constant value because their interest payments are fixed. In reality, most bonds fluctuate in market value throughout their lives. One primary reason is changes in market interest rates.
Bond prices and market interest rates generally move in opposite directions.
Consider an investor who owns a bond paying 3% interest. If newly issued comparable bonds begin offering 5%, the older bond paying 3% becomes less attractive. To sell that bond, the investor may need to accept a lower price. The reverse can also happen. If newly issued comparable bonds offer only 2%, the older bond paying 3% becomes more attractive, potentially increasing its market value.
The length of time until maturity also matters. Longer-term fixed-rate bonds are generally more sensitive to interest rate changes than comparable shorter-term bonds. Importantly, if an investor holds an individual bond until maturity, interim price fluctuations may have less significance, assuming the issuer repays the promised principal. However, selling before maturity could result in a gain or loss.
Are All Bonds the Same?
Not at all. Bonds come in different forms, each with its own characteristics and risks. These are a few of the main types of bonds found in the U.S market:
U.S. Treasury Securities
Issued by the U.S. federal government, Treasury securities are backed by the full faith and credit of the United States. They are generally considered to have very low credit risk, although their market values can fluctuate with interest rates.
Treasury bills, notes, and bonds have different maturity structures, while Treasury Inflation-Protected Securities (TIPS) are designed to provide protection against inflation.
Corporate Bonds
Companies issue bonds to raise capital for business operations, expansion, or other financial needs. Corporate bonds carry varying degrees of credit risk depending on the issuer's financial strength. Bonds from issuers with stronger credit ratings generally offer lower yields than those considered more likely to default.
Higher yields may be attractive, but that additional income often comes with additional risk.
Municipal Bonds
Municipal bonds are issued by state and local governments and certain related entities, often to finance public projects and services.
Some municipal bonds offer U.S. federal income tax advantages. However, tax treatment varies, particularly for investors living outside the United States, and should be reviewed with a qualified tax professional.
Bond ETFs and Mutual Funds
Investors can also gain exposure to fixed income through bond exchange-traded funds (ETFs) and mutual funds, which hold collections of bonds rather than individual securities. These investments have different characteristics, advantages, and risks compared with owning individual bonds, and we'll explore those differences in a future article.
Each category deserves its own discussion, but the important takeaway is that the word bond covers a wide range of investments.
Are Bonds Risk-Free?
Although bonds are often associated with stability, they are not without risk.
Several factors can affect their value and the likelihood that investors receive their expected payments.
Interest Rate Risk: Rising market interest rates generally cause existing fixed-rate bond prices to decline.
Credit Risk: The issuer may be unable to make interest payments or repay the principal.
Inflation Risk: Fixed interest payments may lose purchasing power as the cost of living rises.
Liquidity Risk: Some bonds may be difficult to sell quickly at a reasonable price.
Call Risk: Certain bonds allow the issuer to repay the principal before maturity, potentially forcing the investor to reinvest at a less favorable rate.
These risks vary significantly. A short-term U.S. Treasury security and a long-term, lower-rated corporate bond may both be classified as fixed-income investments, but their risk profiles can be very different.
Why Include Bonds in an Investment Portfolio?
If bonds carry risks and typically have more limited long-term growth potential than stocks, why do investors hold them? Because different investments serve different purposes. Stocks are often included in portfolios for their potential to generate long-term capital growth. Bonds can serve a complementary role.
Depending on the investment and the investor's circumstances, bonds may provide:
Income: Interest payments can provide relatively predictable cash flow.
Portfolio Diversification: Bonds can help reduce reliance on stock market performance, although they do not always rise when stocks fall.
Capital Preservation: Certain high-quality bonds, particularly those held to maturity, may provide greater predictability regarding repayment of principal, subject to the issuer's creditworthiness and the purchase price.
Financial Planning: Bonds with defined maturity dates can help investors plan for future expenses or financial obligations.
The appropriate balance between stocks and bonds depends on an investor's financial goals, time horizon, income needs, and tolerance for risk.
The Bottom Line
Bonds may not generate the same excitement as the stock market, but they can play an essential role in a thoughtfully constructed investment portfolio. They offer investors a different relationship between income, risk, and return.
Understanding how they work, why their prices change, and what risks they carry can help investors make more informed decisions.
Ultimately, successful portfolio construction is not simply about choosing investments with the highest potential returns. It is about understanding what each investment contributes and ensuring the overall portfolio is appropriate for the investor's individual circumstances and long-term goals.
Disclaimer
This article is intended for general educational and informational purposes only and does not constitute individualized investment, legal, or tax advice. Individual circumstances vary, and investors should consult appropriately qualified professionals before making financial decisions. We do not give legal or tax advice. Always consult a tax or legal adviser to review your individual situation.
The information contained in this article reflects the opinions of the author and not necessarily those of Portfolio Resources Group, Inc. or its affiliates.
Rachel Weiss is a licensed investment professional in both the United States and Israel, with over 17 years of experience in the financial services industry. She works with clients to establish and manage U.S. investment accounts, helping them build investment portfolios aligned with their individual financial goals, circumstances, and risk tolerance.
Securities are offered through Portfolio Resources Group, Inc. (www.prginc.net). Member FINRA, SIPC, MSRB, FSI.
For more information, visit www.weissinvest.com or email rweiss@prginc.net.
Sources and Further Reading
U.S. Securities and Exchange Commission (SEC) — Investor.gov: Bonds: Frequently Asked Questions. An overview of bond structures, characteristics, types, and risks.
SEC — Investor Bulletin: Fixed Income Investments: When Interest Rates Go Up, Prices of Fixed-Rate Bonds Fall. Explains the relationship between bond prices, interest rates, and maturity.
Financial Industry Regulatory Authority (FINRA): Bonds. A comprehensive guide to different types of bonds, their characteristics, and the risks associated with fixed-income investing.
