# Credit Default Swap Index (CDX): How It Operates and Benefits Investors

![Credit Default Swap Index (CDX): A benchmark index that tracks a basket of U.S. and emerging market single-issuer credit default swaps.](https://www.investopedia.com/thmb/LltaB_IDrIxCQLqmyLuOel9MMPA=/1500x0/filters:no_upscale():max_bytes(150000):strip_icc()/dowjonescdx.asp-final-69ba4e76b3984294a1ab3c78562cb43a.png)

*— Investopedia / Julie Bang*

> **Definition**
>
> The credit default swap index (CDX), formerly the Dow Jones CDX, is a benchmark financial instrument made up of credit default swaps that have been issued by North American or emerging market companies.

The credit default swap index (CDX) is a benchmark financial instrument comprising credit default swaps (CDS) issued by North American or emerging market companies. Each CDX tracks a basket of corporate bond issuers, with each portfolio covering different areas of this market.

They gauge credit risk in the economy and let investors hedge or speculate on potential defaults. The movement of investment-grade and high-yield credits included in the index can signal shifts in economic sentiment before they show in other indicators, making it a crucial tool for everyone from hedge fund managers to central bankers. The CDX, the first CDS index, was created in the early 2000s from a basket of single-issuer CDSs.

### Key Takeaways

*   The Credit Default Swap Index (CDX) is a benchmark index used to hedge or speculate on credit risk, encompassing a diverse set of credit default swaps from North American and emerging market companies.
*   The CDX is a tradable security that provides broad market exposure and liquidity, making it a more efficient hedging tool than purchasing individual credit default swaps.
*   Comprising 125 issuers, the CDX is categorized into investment-grade and high-yield credits, and it is updated semi-annually to reflect changes in the credit market.
*   Despite its appealing features, the CDX involves complexity, liquidity, and market risks, which can lead to potential financial instability during volatile market conditions.

## An In-Depth Look at the Credit Default Swap Index (CDX)

A CDS is an over-the-counter (OTC) [derivative](https://www.investopedia.com/terms/d/derivative.asp) contract that offers one counterparty protection against a credit event, such as the default or bankruptcy of an issuer. It can be thought of as insurance in the financial world. The CDX tracks and measures total returns for the various segments of the bond issuer market so that the index's overall return can be benchmarked against funds that invest in similar products.

Investors can use the CDX's tracking to monitor their portfolios against this benchmark and adjust their holdings accordingly. The CDX helps [hedge](https://www.investopedia.com/terms/h/hedge.asp) risk by protecting bond investors against default, and traders use CDX indexes to speculate about potential changes in issuers' credit quality. 

The CDX is itself a tradable security: a credit market derivative. However, the CDX index also functions as a shell or container, comprising a collection of other credit derivatives: CDSs.

The CDX contains 125 issuers and is broken down into two types of credits: [investment grade](https://www.investopedia.com/terms/i/investmentgrade.asp) (IG) and [high yield](https://www.investopedia.com/terms/h/high_yield_bond.asp) (HY). The CDX index rolls over every six months, and its 125 names enter and leave the index as appropriate. For example, if one of the names is upgraded from below investment grade to investment grade, it will move from the high-yield index to the investment-grade index when the rebalance occurs.

S&P Global manages this CDX lineup:

*   CDX North American Investment Grade
*   CDX North American Investment Grade High Volatility
*   CDX North American High Yield
*   CDX North American High Yield High Beta
*   CDX Emerging Markets
*   CDX Emerging Markets Diversified

## Benefits of Investing in the Credit Default Swap Index (CDX)

The CDX is standardized and exchange-traded, unlike single CDSs, which trade OTC. As such, the CDX index has a high level of [liquidity](https://www.investopedia.com/terms/l/liquidity.asp) and transparency.

CDX indexes also may trade at smaller spreads than CDSs. Thus, investors may hedge a portfolio of default swaps or bonds with a CDX more cheaply than if they were to buy many single CDSs to achieve a similar effect.

Finally, the CDX is a well-managed tool that is subjected to intense industry scrutiny twice a year. The existence of tools such as CDX indexes makes it easier for both institutional and individual investors to trade in complicated investment products that they otherwise might not want to own separately.

Launched in the early 2000s, CDX helps simplify and make investing in complex, high-risk financial products safer.  

Later, the [LCDX](https://www.investopedia.com/terms/l/lcdx.asp), a credit-derivative index, was created with 100 loan-only CDSs. The difference is that all the CDSs in the LCDX are [leveraged loans](https://www.investopedia.com/terms/l/leveragedloan.asp).

Although a bank loan is considered [secured debt](https://www.investopedia.com/terms/s/secureddebt.asp), the names that usually trade in the leveraged loan market are lower-quality credits. Therefore, the LCDX index is used mostly by those looking for exposure to high-yield debt, but with greater risk.

## Potential Risks of the Credit Default Swap Index (CDX)

The CDX carries several risks, primarily because of its inherent complexity. Investors might find it challenging to fully understand the underlying assets, potentially leading to misinformed decisions. Additionally, the counterparty risk is significant; if the issuer defaults, the buyer could face substantial losses.  

Liquidity risk is another crucial aspect to consider. The CDX market can occasionally suffer from low liquidity, creating challenges for investors trying to execute trades at their preferred prices. This can increase losses during market stress when liquidity drops, and spreads widen, impacting portfolio performance.  

Market risk is also pertinent, as the value of the CDX can fluctuate based on changes in credit spreads and economic conditions. In volatile markets, these indexes can experience sudden price swings, resulting in heightened uncertainty and potential financial instability for investors. Such volatility might deter risk-averse individuals from investing in the CDX.

## What is the Difference between CDS and CDX swaps?

A CDS is a contract on a single entity's credit risk, while a CDX is an index that aggregates many CDS contracts, representing a portfolio of credit risks.

## Who Invests in CDX Swaps?

The CDX markets are predominantly engaged by institutional players like hedge funds, pension funds, and insurance companies.

## Why Might an Investor Choose a CDX Over Individual CDS Contracts?

An investor might prefer a CDX for its diversification benefits and the ability to manage credit risk across a broader range of entities in a single transaction.

## What Does It Mean When a CDX Rolls?

When a CDX "rolls," the current series is updated with a new set of reference entities to reflect changes in the credit market conditions.

## The Bottom Line

The CDX is a crucial tool in the financial world, providing a benchmark for tracking a diversified portfolio of U.S. and emerging market credit default swaps. It offers investors broad market exposure and efficient hedging against defaults. The CDX index provides utility for sophisticated investors, policymakers, hedge fund managers, pension funds, and insurance companies through early indicators, because it mirrors shifts in economic sentiment through changes in credit spreads.

The 125-issuer CDX is significantly more reliable than single-issuer CDS contracts in providing diversification and simplifying the management of multiple credit exposures in a single transaction.

However, investing in CDX comes with considerable risks, including market volatility and liquidity issues, which can impact its overall performance and attractiveness.

> **Article Sources**
>
> 1.  S&P Global. "[CDX Tradable CDS Indices](https://www.spglobal.com/spdji/en/landing/topic/cdx-tradable-cds-indices/)."
>     
> 2.  John C. Hull. "[Options, Futures, and Other Derivatives](https://www.pearson.com/en-us/subject-catalog/p/options-futures-and-other-derivatives/P200000005938/9780136939917),” Page 566–573, 810. Pearson, 2022.