A credit default swap, or CDS, is a financial contract that works a lot like insurance against a borrower failing to pay its debts. One side pays a regular fee, and the other side agrees to cover losses if the borrower defaults. The market for these contracts is mainly used by banks, funds and other large investors, but CDS prices often turn up in news stories because they can give an early read on how worried markets are about a company or country.
How a CDS works
There are two parties in a credit default swap:
- The protection buyer pays a regular premium, a bit like an insurance payment.
- The protection seller collects that premium and agrees to pay out if a defined “credit event”, such as a default, happens to the borrower named in the contract.
The borrower in question is called the reference entity. It could be a company or a government. Importantly, the borrower itself is not part of the contract. Two other parties are simply agreeing to share the risk that it fails.
What the price tells you
The cost of protection is usually quoted as a spread in basis points per year, where one basis point is one hundredth of a percentage point. A higher spread means protection is more expensive, which suggests the market sees a greater chance of default or a bigger potential loss.
As a purely illustrative example, if protection on a company’s debt rises from a low spread to a much higher one over a few weeks, that tells you investors have become more nervous about that company’s ability to pay. It does not mean a default will happen. It means the price of insuring against it has gone up.
Why investors use them
People use credit default swaps for several reasons:
- To hedge, such as a lender protecting itself against a borrower it has lent to.
- To take a view, buying protection if they think a borrower’s credit is getting worse, or selling it if they think fears are overdone.
- To manage risk across a portfolio without having to sell the underlying bonds.
Because they can be used to take a view without owning the bonds, CDS are sometimes in the spotlight during periods of stress.
Why equity traders watch them
CDS spreads can act as a warning light. If the cost of protecting against a company’s default rises sharply, that is a sign that credit investors are worried, and their concerns can spill into the share price. This week, for example, traders have been watching the cost of default protection on some heavily borrowed technology infrastructure firms as part of a wider debate about debt-funded AI spending.
At a national level, CDS on government debt can be read alongside measures such as a sovereign credit rating, although the two do not always move together. The market price can react in hours, while ratings tend to change more slowly.
The 2008 lesson
Credit default swaps became widely known during the 2008 financial crisis. Some large institutions had sold huge amounts of protection without enough capital to pay out if many borrowers failed at once. When losses mounted, that concentration of risk added to the stress in the system. Since then, regulators have pushed much of the market towards central clearing and greater reporting, aiming to make the risks more visible.
Common misunderstandings
- A rising CDS spread is a sign of worry, not proof of an imminent default.
- Thinly traded CDS can move on small trades, so a single jump may exaggerate sentiment.
- CDS cover credit risk, not share price falls. A company can see its shares slump while its debt is still seen as safe.
If you are new to bonds generally, our guide on why bond prices fall when yields rise is a helpful starting point.
Bringing it together
A credit default swap is a contract that transfers the risk of a borrower defaulting from one party to another in exchange for a regular fee. Its price acts as a real-time gauge of credit worries, which is why it often features in market news. It is a signal worth understanding, but one to read with care rather than treat as a forecast.
If you want to check how well you understand risk signals like this, our free trader assessment is a sensible next step.
