
When investors purchase a government bond, they are effectively lending the government money. When they buy a corporate bond, they are lending a company money.
Like a loan, a bond pays a periodic interest payment known as a coupon to the bondholder. At the end of the bond's life – called maturity – the principal is paid back to the investor.
The company – or bond issuer – offers a coupon of 5% per annum to be paid quarterly. The bonds will mature after five years, at which time the company will repay the $1,000 face value to each bondholder.
In developed market economies, government bonds are generally considered low- risk investments. However, this is not true for all markets, and investors need to be aware that some government bonds, for example those issued in emerging markets, may carry higher levels of risk. On the flipside, such bonds can provide investors with access to investments offering different income and growth profiles.
Corporate bonds fall into two broad categories – investment grade and speculative grade (also known as high yield or junk bonds). Speculative-grade bonds are issued by companies perceived to have lower credit quality and higher default risk than more highly rated investment-grade companies. Ratings can be downgraded if the credit quality of the issuer deteriorates. Conversely, they can be upgraded if fundamentals improve.
As we discussed in Topic 1 of this series, governments and corporations issue bonds when they need to raise money. In return for buying the bonds, the investor – or bondholder – receives periodic interest payments known as coupons. The coupon payments, which may be made quarterly, twice yearly or annually, provide regular, predictable income to the investor.
At the end of the bond’s life known as maturity, the principal is paid back to the investor.
For example, a company may decide to issue five-year bonds with a face value of $1,000 each paying an annual coupon of 4%. The investor will pay $1,000 to buy the bond and, assuming there are no defaults, they will receive:


Investors may be confused about why the price of bonds can change when the face value is fixed. An important distinction to make is that the face value of a bond never changes, while the market price can change daily.
If investors want to invest in a company, they can choose to purchase its shares or its bonds. Both are a way for the company to raise money needed to fund its activities. The overall mix of debt and equity that the company uses is referred to as its capital structure.
If investors buy shares in the company, they become part-owners of the company. If investors buy the company’s bonds, then they become lenders to the company.
There are several key differences between an investment in bonds and an investment in shares, as highlighted in the table below.


THE RISK-RETURN PROFILES OF BONDS VERSUS SHARES
During recent decades, bonds have evolved into a $100 trillion global market. Not surprisingly, there is a wide range of bonds available, each offering different risk and return profiles.
Most bond investments, however, are designed to provide regular income and capital preservation. As such, they are generally considered to be a lower risk investment when compared with shares.
The chart below provides a high-level overview of where bonds fall on the risk and return spectrum relative to shares and several other asset classes.
The price of a bond relative to yield is key to understanding how a bond is valued. Essentially, the price of a bond goes up and down depending on the value of the income provided by its coupon payments relative to broader interest rates.
If prevailing interest rates increase above the bond’s coupon rate, the bond becomes less attractive. In this situation, the bond price drops to compensate for the less attractive yield. Conversely, if the prevailing interest rate drops below the bond’s coupon rate, the price of the bond goes up as it becomes more attractive.
For example, if a bond has a 4% coupon and the prevailing interest rate rises to 5%, the bond becomes less attractive and so its price will fall. On the other hand, if a bond has a 4% coupon and the prevailing interest rate falls to 3%, that bond becomes more attractive which pushes up its price on the secondary market.

Apart from interest rate movements, there are three other key factors that can affect the performance of a bond: market conditions, the age of a bond and its rating. Let’s look at each in turn.
What this chart tells us
This article was originally produced by PIMCO. You can read the full article here.
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