Why Bond Prices Fall When Interest Rates Rise

Why do bond prices fall when interest rates rise?

Bond prices generally fall when interest rates rise because most bonds make fixed coupon payments throughout their term. If newly issued bonds begin offering higher yields, an existing bond with a lower coupon payment may become less attractive at its original market price. As a result, its market value may decline until its effective return becomes more comparable with current market conditions.

At the same time, interest rates are only one factor that can influence bond prices. The extent of any price movement can also depend on the bond's maturity, coupon rate, yield, credit quality, liquidity, and other market conditions. The inverse relationship between bond prices and interest rates may be most noticeable when these other factors remain relatively unchanged.

The basic relationship between bond prices and interest rates

A bond represents a loan made by an investor to a government, municipality, corporation, or other issuer. In return, the issuer is contractually obligated to make scheduled interest payments, known as coupon payments, and to repay the bond's face value at maturity. These payments depend on the issuer remaining able to meet its obligations; if it defaults, some or all of the expected payments may not be made.

The coupon rate is typically established when the bond is issued and generally remains fixed throughout its term. As a result, the coupon payments usually do not change when market interest rates move.

Instead, the bond's market price adjusts. When market interest rates rise, newly issued bonds may offer higher yields than existing bonds with lower fixed coupons. To remain competitive, an existing bond may trade below its face value so that its effective return becomes more comparable with current market conditions.

For example, a bond paying a lower fixed coupon may become less attractive if similar newly issued bonds begin offering higher yields. Rather than changing the coupon payment, buyers and sellers adjust the bond's market price.

Why an existing bond becomes less competitive when rates rise

The relationship between bond prices and interest rates becomes easier to understand by following the sequence of events after a bond has been issued.

A bond may initially be issued with a fixed coupon rate that reflects market conditions at that time. Once the bond begins trading in the secondary market, its coupon payments generally remain unchanged for the rest of its term.

If market interest rates later rise, newly issued bonds may begin offering higher yields than comparable bonds issued earlier. Investors evaluating similar bonds may compare the income available from each option.

An existing bond with lower fixed coupon payments may therefore become relatively less attractive than a newly issued bond offering a higher yield. Since the coupon cannot usually be adjusted, the market price of the existing bond may decline. A lower purchase price can increase the return available to a new buyer, helping align the bond more closely with prevailing market conditions.

Understanding a few common terms can help explain this process.

Coupon rate

The coupon rate refers to the annual interest payment expressed as a percentage of the bond's face value. This rate is generally established when the bond is issued and typically remains unchanged throughout the bond's life.

Current yield

Current yield compares the bond's annual coupon payments with its current market price. Because market prices can change over time, the current yield can also change even though the coupon payment remains the same.

Yield to maturity

Yield to maturity estimates the total annualized return that a purchaser may receive if the bond is purchased at its current market price and held until maturity, assuming scheduled coupon payments are received, and the issuer meets its obligations. The calculation also considers any difference between the purchase price and the amount repaid at maturity.

The coupon rate generally remains fixed throughout the bond's life, while current yield and yield to maturity may change because the bond's market price changes. This distinction helps explain why existing bonds may trade above or below their face value as interest rates move.

A simple bond price example

Assume a bond has the following characteristics:

• Face value: $1,000

• Coupon rate: 3%

• Annual coupon payment: $30

• Remaining maturity: 10 years

• Coupon frequency: Annual

• Comparable market yield for newly issued bonds: 4%

When the bond was originally issued, a 3% coupon may have reflected prevailing market conditions. If comparable newly issued bonds later begin offering yields of 4%, a purchaser comparing available bonds may place greater value on the newer issue because it offers higher income for a similar investment.

As a result, the existing bond paying $30 annually may no longer trade at its full $1,000 face value. Instead, its market price may decline below face value so that the return available to a new purchaser becomes more comparable with bonds currently being issued.

Discounting the $30 annual coupons and the $1,000 repayment at a 4% yield gives a price of approximately $919, a decline of about 8% from face value. The $81 discount is what brings the bond's return into line with the 4% available on newly issued bonds.

The exact market price would depend on several variables, including the bond's remaining maturity, the timing of future coupon payments, prevailing market yields, and pricing conventions used in the market. A one percentage point increase in market yields does not correspond to a fixed percentage decline in a bond's price.

Why some bonds move more than others

Not all bonds respond to changes in interest rates to the same extent. While rising market yields may place downward pressure on bond prices, the size of the price movement can vary depending on several characteristics of the bond.

Maturity

Maturity refers to the time remaining before a bond's face value may be repaid. In general, longer-maturity bonds are more sensitive to changes in market yields than shorter-maturity bonds.

This can happen because investors in longer-term bonds may receive the same fixed coupon payments for many years. If market yields rise during that time, those payments may become less competitive than those offered by newly issued bonds. As a result, the bond's market price may experience a larger adjustment.

By comparison, bonds nearing maturity typically have fewer remaining coupon payments, so their prices may be less sensitive to changes in market yields.

Coupon rate

A bond's coupon rate can also affect how much its price changes.

In general:

• Lower-coupon bonds may be more sensitive to rising market yields because they provide smaller fixed interest payments.

• Higher-coupon bonds may be less sensitive because a greater share of their value comes from earlier coupon payments.

The relationship between coupon rate and price sensitivity also depends on factors such as maturity and prevailing market conditions.

Duration

Duration is a measure commonly used to estimate how sensitive a bond's price may be to changes in market yields. Unlike maturity, duration considers both the timing and amount of a bond's expected cash flows.

For example, a bond with a duration of six years may experience an approximate 6% decline in price if market yields rise by one percentage point, assuming other factors remain relatively unchanged. Likewise, its price may increase by approximately 6% if market yields decline by one percentage point under the same assumptions.

Duration provides an estimate rather than a precise prediction. Actual price movements may differ because the relationship between bond prices and yields is not perfectly linear, and other market factors can also influence pricing.

What happens when interest rates fall?

The relationship between bond prices and interest rates generally works in both directions.

When market interest rates decline, newly issued bonds may begin offering lower yields than comparable bonds issued earlier. An existing bond with a higher fixed coupon payment may therefore become more attractive to buyers.

As demand increases, the bond's market price may rise above its face value. The coupon payment itself generally does not change because the coupon rate was established when the bond was issued.

Even when interest rates decline, other factors such as credit quality, liquidity, and broader market conditions may continue to influence a bond's market price.

Does a bondholder lose money when rates rise?

A decline in a bond's market price does not necessarily mean a bondholder has experienced a realized loss.

Unrealized vs. realized changes

If a bond's market value falls after interest rates rise, the decline may represent an unrealized change in value while the bond continues to be held. A realized gain or loss generally occurs only if the bond is sold.

For an individual bond held to maturity, the issuer may continue making the stated coupon payments and may repay the face value at maturity, assuming the issuer meets its obligations.

Factors that can affect outcomes

Holding a bond until maturity may produce a different outcome than selling before maturity. Even so, several factors can continue to affect the overall outcome, including:

• Issuer default risk

• Callable bond features

• Inflation and purchasing power

• Reinvestment conditions for coupon payments

• Transaction costs

• Taxes

Bond funds differ from individual bonds because they generally hold portfolios that change over time. Since a bond fund does not have a single maturity date, changes in market interest rates may continue to influence its net asset value.

Individual bonds and bond funds do not behave exactly the same way

Although both provide exposure to fixed-income securities, individual bonds and bond funds have different structures.

Individual bonds generally have:

• A stated maturity date

• A defined face value that may be repaid at maturity, assuming the issuer meets its obligations

• Market prices that can fluctuate before maturity

Bond funds generally:

• Hold a portfolio of many bonds

• Buy and sell securities over time

• Do not mature on a single date

• Have a net asset value that can rise or fall as the value of the underlying holdings changes

Distribution amounts, duration, portfolio composition, and other characteristics can also influence how a bond fund responds to changes in market yields.

Other factors that can affect bond prices

Interest rates are only one factor that may influence a bond's market price. Other considerations include:

• Credit quality: Changes in an issuer's financial condition may influence how investors value its bonds.

• Default risk: The possibility that an issuer may not make scheduled payments can affect pricing.

• Liquidity: Bonds that trade less frequently may experience larger price movements when there are fewer buyers or sellers.

• Inflation expectations: Changes in expected inflation may affect the purchasing power of future coupon payments and principal repayments.

• Time to maturity: A bond's remaining term can influence its sensitivity to market conditions.

• Embedded features: Provisions such as call features may affect how a bond is priced.

• Supply and demand: Changes in market demand for certain bonds may influence their prices.

Because several factors can affect pricing at the same time, a bond's market value may change even when central bank policy rates remain unchanged.

Final thoughts on bond prices and interest rates

Bond prices and interest rates generally move in opposite directions because existing bonds compete with newly issued bonds as market yields change. While this relationship provides a useful framework for understanding bond pricing, the extent of any price movement may also depend on factors such as maturity, coupon rate, duration, credit quality, and market conditions. Understanding these mechanics can provide helpful context for interpreting how bonds may respond to changing interest rate environments.