What is a credit default swap?
A credit default swap, or CDS, is a financial contract that moves the risk of a loan or bond default from one party to another. It works like insurance on debt. One party pays regular fees. The other promises to pay if the borrower defaults.
A CDS is tied to a specific borrower or bond. That borrower is called the reference entity. The amount the contract protects is called the notional amount.
The three parts
- Protection buyer: pays a fee. They want to protect against default.
- Protection seller: collects the fee. They promise to pay if default happens.
- Reference entity: the company or government whose debt is covered.
Example: A bank owns a $10 million bond from Company X. The bank buys a CDS to protect that bond. If Company X defaults, the CDS seller pays the bank.
How a CDS works, step by step
- Buyer and seller agree on the notional amount and the contract terms.
- Buyer pays an annual fee called the CDS spread. It is often quoted in basis points. One basis point is 0.01 percent.
- If the reference entity does not default, the seller keeps the fees.
- If the entity defaults, there is a settlement. The seller pays the buyer either:
- A cash amount equal to the loss, or
- Delivers the defaulted bond and receives the contract notional in cash.
There are two settlement types. Physical settlement means delivering the bond. Cash settlement means paying the loss amount.
Pricing in simple terms
The CDS spread is the fee paid every year as a percentage of notional. For example, a 200 basis point spread means 2 percent per year.
A basic rule of thumb: CDS spread ≈ default probability per year × (1 − recovery rate)
Recovery rate is how much you expect to get back if default happens. If recovery is 40 percent, the loss given default is 60 percent.
Example:
- Spread = 200 bps = 0.02
- Recovery = 40 percent = 0.4
- Implied default probability ≈ 0.02 / 0.6 = 0.0333 or 3.33 percent per year
This is a rough estimate. Real pricing also includes interest rates, time to maturity, and counterparty credit risk.
Why people use CDS
- Hedging: A holder of a bond buys protection to avoid loss if the borrower defaults.
- Speculation: Traders buy protection without owning the bond. They profit if the reference entity’s credit worsens.
- Arbitrage: Traders exploit price differences between CDS and bonds.
- Risk transfer: Banks reduce the capital they must hold against loans by transferring risk.
Risks and problems
- Counterparty risk: If the CDS seller goes bankrupt, protection may fail.
- Systemic risk: Many CDS contracts link banks and firms. Large failures can spread through the system.
- Lack of transparency: Historically, many CDS trades happened over the counter. That made it hard to see total risk.
- Naked CDS: Buyers without an underlying bond can bet against a company. This can amplify market moves.
- Complexity: Contracts can include tricky clauses about what counts as default.
What happened in 2008
CDS played a big role in the 2008 financial crisis. Many large institutions wrote a lot of protection and could not pay when defaults rose. Problems included unclear exposures and big counterparty failures. After 2008 regulators pushed for more central clearing and reporting to reduce risk.
Rules and reforms
Regulators implemented changes:
- Central clearing houses now handle many CDS trades. This reduces counterparty risk.
- Trade repositories collect data so regulators can see exposures.
- Margin and capital rules force sellers to hold more funds.
These changes make CDS markets safer but do not remove all risks.
How CDS differs from bond insurance
Bond insurance typically requires the buyer to own the bond. Insurance companies underwrite the risk and are regulated. CDS are contracts between parties and can be bought without owning the bond. CDS are more flexible but can be used for speculation.
When to use a CDS and what to watch
Use a CDS if you need to hedge credit risk and understand the counterparty. Watch these things:
- The CDS spread. Higher spread means higher perceived risk.
- The seller’s credit quality. If the seller may fail, protection is weak.
- Contract terms. Know what counts as a default and how settlement works.
- Market liquidity. Thin markets can make it hard to buy or sell protection.
Summary
A credit default swap moves the risk of a default from one party to another. It is like insurance on debt but more flexible. It can hedge risk or be used to speculate. Pricing links spreads, default probability, and recovery. CDS helped reveal weaknesses in the financial system in 2008. Today the market is more regulated, but risks remain.