What is a credit default swap in simple terms?

A contract that works like insurance on a borrower's debt. The buyer of protection pays a running premium, quoted in basis points a year on the notional amount. If the borrower has a credit event, such as bankruptcy or a missed payment, the seller pays the buyer par minus what the debt is worth afterwards.

Do you need to own the bond to buy CDS?

No. Many buyers of protection own no bonds at all. A hedge fund can buy protection to bet that a company's credit will get worse, which is often easier than borrowing and shorting a bond.

Who is long credit in a CDS?

The seller of protection. Like a bondholder, the seller collects a spread and loses if the company defaults or its spread widens. The buyer of protection is short credit and gains when the company's credit gets worse.

How do you hedge a corporate bond?

Split it into its two risks. Hedge the rate risk with Treasuries, Treasury futures or an interest rate swap, sized by DV01 so the dollar sensitivity matches. Hedge the credit risk with single-name CDS on the issuer, or with a credit index if single-name protection is not available, which covers the market-wide move but leaves the company-specific risk.

Sales & Trading

Credit default swaps and hedging credit

By SuperdayReps · Michigan Ross Undergrad | Wharton MBA · ex-Citi | ex-Greenhill · Former Head Mentor at a Leading IB Prep Service

11 min read · updated November 3, 2026

A credit desk holds bonds it bought from clients, and it cannot always sell them the same day. It needs a way to cut its risk without selling. Clients have the same problem: a bank with a large loan to a company it worries about, a fund holding bonds that would be costly to dump. The tool for both is the credit default swap (CDS), and the skill is knowing which risk in a bond to hedge with what.

Interviewers ask this because it shows whether you see a corporate bond as one risk or two. A strong candidate can explain a CDS in plain words, put a number on the premium and the payout, say why someone would buy protection without owning the bond, and then hedge a bond position the way a trader would: rates with one tool, credit with another.

Key insight

A CDS separates credit risk from everything else in a bond. The buyer pays a running spread and gets par minus recovery if a credit event happens. A corporate bond carries two risks, the Treasury yield moving and the spread moving, so a trader hedges each with its own tool: Treasuries or swaps sized by DV01 for rates, single-name CDS or an index for credit.

How a CDS works

A CDS has two sides, called legs, on an agreed notional amount (the size the contract is written on, say $10 million).

The premium leg. The buyer of protection pays a spread on the notional, quarterly, for the life of the contract. Five years is the most traded maturity.
The protection leg. If a credit event happens, the seller pays the buyer par minus the recovery value of the debt. The premium payments then stop.

The CDS spread is quoted in basis points a year, just like a bond's credit spread, and the two are closely related. Both are what the market charges to bear this company's default risk.

Worked example: premium and payout

Say a company's five-year CDS trades at 200 bp and a fund buys protection on $10 million.

Item	Calculation	Amount
Annual premium	$10,000,000 × 2%	$200,000
Quarterly payment	$200,000 / 4	$50,000
Recovery after a default	set by auction	35 cents on the dollar
Protection payment	$10,000,000 × (100% minus 35%)	$6,500,000

The fund pays $50,000 a quarter until the contract ends or a credit event happens. If the company defaults and its bonds are worth 35 after the event, the seller pays $6.5 million and the premium stops.

Upfront payments and standard coupons

In practice, single-name contracts are standardized. In North America the running coupon is fixed at either 100 bp or 500 bp, and an upfront payment at the start makes up the difference between that coupon and the market spread. You still quote and think in spread.

Say the market spread is 200 bp but the contract pays a 100 bp coupon. The buyer is paying 100 bp a year too little, so it pays roughly that shortfall up front: 100 bp times the contract's risky duration (the present value of 1 bp a year over the contract's expected life, which is shorter than five years because payments stop at default). With a risky duration of about 4.1, the upfront is about 1% × 4.1 × $10 million, or roughly $410,000. Standard coupons make contracts identical, so they can be netted and cleared.

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Frequently asked

What is a credit default swap in simple terms?: A contract that works like insurance on a borrower's debt. The buyer of protection pays a running premium, quoted in basis points a year on the notional amount. If the borrower has a credit event, such as bankruptcy or a missed payment, the seller pays the buyer par minus what the debt is worth afterwards.
Do you need to own the bond to buy CDS?: No. Many buyers of protection own no bonds at all. A hedge fund can buy protection to bet that a company's credit will get worse, which is often easier than borrowing and shorting a bond.
Who is long credit in a CDS?: The seller of protection. Like a bondholder, the seller collects a spread and loses if the company defaults or its spread widens. The buyer of protection is short credit and gains when the company's credit gets worse.
How do you hedge a corporate bond?: Split it into its two risks. Hedge the rate risk with Treasuries, Treasury futures or an interest rate swap, sized by DV01 so the dollar sensitivity matches. Hedge the credit risk with single-name CDS on the issuer, or with a credit index if single-name protection is not available, which covers the market-wide move but leaves the company-specific risk.