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Index-Linked Bond


An index-linked bond is a type of investment in which the potential return is directly connected to the performance of a specific index, such as the Consumer Price Index (CPI) or another financial market index. The interest rate and principal value of these bonds rise or fall in correspondence with the changes in the index. It is primarily used as a hedge against inflation or deflation.


The phonetics of “Index-Linked Bond” is: “In-deks-Linked Bond”In the International Phonetic Alphabet: /ˈɪndɛks lɪŋkt bɒnd/

Key Takeaways

  1. Nature of Index-Linked Bonds: Index-Linked Bonds are financial instruments that have their interest rates and principal amount adjusted with variations in a particular index. Typically, these bonds are linked to inflation benchmarks like the Consumer Price Index (CPI).
  2. Protection against Inflation: The primary advantage of investing in Index-Linked Bonds is that they protect investors against inflation. As the bond’s value rises with increasing inflation, the investors will obtain a real rate of return regardless of economic conditions.
  3. Risk and Return: The risk and return profile of Index-Linked Bonds is relatively lower than conventional bonds. While they protect against inflation, these bonds generally provide lower yields. Therefore, they may not always provide the desired returns in times of low inflation or deflation.


An Index-Linked Bond is an important financial instrument for both investors and issuers as it offers protection against inflation. This bond’s interest payments and principal amount are tied to a specific price index, often a Consumer Price Index. For investors, it guarantees that their returns keep pace with inflation, preserving the real value of their investment regardless of economic climate. For issuers, particularly governments, they offer a way to finance spending at a real interest rate which can be lower than fixed-rate borrowing. This instrument is especially appealing in uncertain or inflationary economic environments.


An Index-Linked Bond is primarily used to provide investors with a protective shield against inflation while still ensuring steady income. The principal value of these bonds is tied to a specific price index, often the Consumer Price Index (CPI), and adjusted accordingly over time. This means that when inflation rises, so does the value of the bond’s principal, therefore maintaining the real value of investors’ capital. The interest payments, or coupons, consequently increase as well, since they are usually a fixed percentage of the adjusted principal. Consequently, Index-Linked Bonds are an effective tool for investors to maintain the purchasing power of their wealth and ensure a real return on investment.

Furthermore, index-linked bonds are used by governments and corporations as a method of debt financing. Governments, in particular, issue these types of bonds to attract investors using the benefit of inflation protection. Companies can also use index-linked bonds to manage their debt obligations in inflationary economies, where the cost of servicing the debt can significantly increase over time. These bonds accompany lower yields in comparison to other bonds, but they offer the distinct advantage of principal security in volatile economic conditions. Thus, they attract the type of investors who value protection over high returns.


1. UK’s Treasury’s Index-Linked Gilts: The UK Treasury issues index-linked gilts, which are bonds linked to the UK’s RPI (Retail Price Index) Inflation. This implies that both the semi-annual coupon payments and the principal that will be returned on maturity are adjusted to reflect the inflation rates over the bond’s life.

2. U.S. Treasury Inflation-Protected Securities (TIPS): TIPS is a type of U.S. Treasury bond introduced in 1997 that is indexed to inflation to protect investors from the negative effects of inflation. The principal of TIPS increases with inflation and decreases with deflation, as measured by the Consumer Price Index (CPI).

3. Canadian Real Return Bonds (RRBs): RRBs are government-issued bonds in Canada that are tied to the Canadian Consumer Price Index (CPI), ensuring that the investor’s return keeps pace with inflation. The interest payments and the principal are both adjusted by the current CPI level.

Frequently Asked Questions(FAQ)

What is an Index-Linked Bond?

An Index-Linked Bond is a type of bond in which payment of income on the principal is related to a specific price index. Usually, the interest rate of this bond is adjusted according to inflation rates to protect the bondholder against inflationary risk.

How do Index-Linked Bonds work?

Index-Linked Bonds work by setting their interest rates or coupon rate with reference to a particular index – often the Consumer Price Index (CPI). When the index rises or falls, the interest paid on the bond adjusts accordingly, providing a measure of inflation protection.

Why would an investor consider purchasing Index-Linked Bonds?

Investors would consider purchasing Index-Linked Bonds if they want to safeguard their investments against inflation risk. This might be useful in an environment where inflation is expected to rise, because it would, correspondingly, increase the interest that would be paid out on the bond.

What are the risks involved with Index-Linked Bonds?

One potential risk with Index-Linked Bonds is deflation. If the consumer price index falls, the interest rate on the bond will decrease. That’s why these bonds are less suitable in a deflationary environment. Another risk is liquidity risk as they are not widely traded.

Are Index-Linked Bonds tax efficient?

This often depends on the tax laws within your jurisdiction. In some cases, holders of Index-Linked Bonds may need to pay tax on their inflation-adjusted principal, in addition to the interest they receive.

Where can investors buy Index-Linked Bonds?

Investors can buy Index-Linked Bonds directly from the issuer or on the secondary market. In many countries, index-linked bonds can be purchased through government bond programs.

Are Index-Linked Bonds the same as Inflation-Linked Bonds?

Yes, Index-Linked Bonds are also commonly known as Inflation-Linked Bonds because they are most commonly tethered to inflation indices like the Consumer Price Index (CPI).

Related Finance Terms

  • Capital Protection: This is an investment strategy where the primary goal is to prevent loss in a portfolio. Index-linked bonds are often bought as they can provide protection against inflation risk.
  • Inflation Risk: This refers to the potential impact of inflation on the value of investments. Index-linked bonds can help to mitigate this risk as their interest income and principal value are adjusted with inflation.
  • Bond Yield: This refers to the return an investor realizes on a bond. The yield of an index-linked bond may vary based on inflation rates.
  • Nominal Value: This term refers to the face value, or original cost, of a bond. In the case of index-linked bonds, the nominal value is adjusted in line with inflation.
  • Fixed Income Security: Index-linked bonds fall under this category. These are investment types that yield a fixed or predictable return, such as bonds or treasury notes.

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