A bond default swap usually means a credit default swap written on a bond or similar debt instrument, allowing one party to buy protection against the issuer’s default.
Basic mechanics
The protection buyer pays a periodic premium, often called the CDS spread. In return, the protection seller agrees to compensate the buyer if a defined credit event occurs, such as default, failure to pay, or restructuring.
Economically, the contract separates:
- the bond’s cash-flow stream, and
- the bond’s default risk.
That lets investors hedge a bond position without selling the bond itself.
Why it matters
A bond default swap can be used for:
- hedging, when a bondholder wants insurance against default,
- speculation, when a trader takes a view on credit deterioration without owning the bond,
- price discovery, because CDS spreads often move quickly when markets reassess creditworthiness.
In stressed markets, CDS prices can become a widely watched signal of sovereign or corporate credit risk.
Policy and risk context
These contracts can improve risk sharing, but they also create counterparty risk and can amplify leverage if used aggressively. That is why they became a major focus after the global financial crisis.