What Are Corporate Inflation-Linked Securities (CILS)?

What Are Corporate Inflation-Linked Securities (CILS)?

4 Min.

Corporate inflation-linked securities are bonds that aim to protect against the negative effects of inflation on the rate of return. They achieve this by linking the coupon rate to an inflationary gauge, such as the consumer price index. By doing so, they offer additional diversification to a bond portfolio and can reduce its duration. It's worth noting that when inflation is low, corporate inflation-linked securities may generate lower returns compared to traditional corporate bonds.


Corporate Inflation-Linked Securities (CILS) are a group of investment instruments designed to address the challenges that inflation poses to a bond's return. In a scenario where interest rates increase, the returns on bonds and similar securities decrease. CILS tackle this issue by linking the coupon rate to an inflation indicator, like the Consumer Price Index (CPI). When inflation climbs, the coupon rate increases, while it decreases during deflationary periods.

How Do Corporate Inflation-Linked Securities Work?

Inflation occurs as the costs of goods and services surge, eroding the overall buying power within the economy. This translates to a situation where, as prices increase, the value of a dollar or any other currency unit diminishes. The consequences of inflation are wide-reaching, affecting consumer buying power, borrowing costs, and investment returns, such as those from bonds.

The returns on fixed-income securities are intertwined with interest rates and, by extension, inflation. In times of inflation, governments typically raise interest rates. As interest rates climb, bond yields decrease, resulting in reduced potential earnings for investors. To address these economic risks, certain securities are designed to consider inflation, aiding investors in safeguarding their holdings.

Corporate inflation-linked securities, commonly known as inflation-linked bonds or linkers, are a category of fixed-income securities. They feature a unique coupon rate mechanism that adapts on a monthly basis, closely tracking the current inflation rate. These adaptable bond yields offer investors a reliable income stream that swiftly responds to fluctuations in inflation, effectively shielding them against the erosive effects of rising prices.

The majority of CILS are typically issued by financial institutions. These issuances often remain relatively small in scale, making it challenging for retail investors to access CILS offerings independently. To navigate this market, retail investors typically rely on specialized bond brokers. It's crucial to recognize that CILS are not as prevalent as conventional fixed-income securities. While CILS offer investors more attractive nominal yields, it's essential to understand that they still expose investors to the same credit risk, interest rate risk, and default risk inherent in regular corporate bonds.

Corporate Inflation-Linked Securities (CILS) vs. Treasury Inflation-Protected Securities (TIPS)

Corporate inflation-linked securities share similarities with Treasury inflation-protected securities, government-issued bonds that adjust their principal in response to inflation. These securities offer diversification benefits as they exhibit a low correlation with other asset classes, reducing interest-rate sensitivity within a bond portfolio. This is particularly notable given their typical maturity range of five to ten years. However, it's important to note that CILS returns may lag behind traditional corporate bonds during periods of low inflation.

Corporate Inflation-Linked Securities Example

Corporate Inflation-Linked Securities often feature a coupon rate with the potential for a cap and may incorporate a partially floating component. This rate typically correlates with a recognized inflation metric like the Consumer Price Index (CPI) and undergoes monthly updates. For instance, suppose there's a corporate inflation-linked bond with a $1,000 par value and a 5% coupon rate, resulting in annual payments of $50 for bondholders. If inflation surges to a level necessitating $75 per year for bondholders, the coupon rate must adjust accordingly to 7.5% (7.5% x $1,000 = $75). CILS structures are designed to facilitate this rate increase in response to rising inflation.


Corporate Inflation-Linked Securities play a crucial role in addressing inflation's challenges to bond investments. By linking their coupon rates to inflation indicators like the Consumer Price Index, they shield against rising prices' erosive effects. While they offer diversification benefits and reduced interest-rate sensitivity to bond portfolios, it's important to recognize that CILS may generate lower returns compared to traditional corporate bonds during periods of low inflation. Nevertheless, they serve as a valuable tool for investors looking to protect their holdings from the impact of inflation and maintain a reliable income stream in an ever-changing economic landscape.

Corporate Inflation-Linked Securities (CILS)