A credit protection seller is the party that accepts a contractual credit-payment obligation in exchange for premiums. In a credit default swap, the seller promises the protection buyer a specified payment or settlement if a covered credit event occurs and the required conditions are met. Receiving premium therefore adds credit exposure: a small regular inflow can accompany a much larger contingent outflow.
The seller is a CDS counterparty, distinct from the reference entity whose credit is covered. “Selling protection” means taking the covered credit risk. It does not mean selling the reference entity's bonds. Settlement may involve cash or delivery of eligible debt, according to the contract; ISDA's disclosure annex describes the seller's different obligations and the importance of the actual terms.
The seller's cash ledger
Consider a fictional CDS with USD 10 million notional. Notional scales the contractual payments; it is neither today’s CDS market value nor the seller’s net portfolio exposure. Keep these two cases separate.
A complete no-event period. Stipulate a running coupon of 100 basis points per year, or 1%, and a accrual fraction. If the entire stipulated period completes without a covered event and the buyer performs, the seller receives
This is one period's premium receipt. It is not a return on a USD 10 million cash investment, nor is it profit after costs and changes in the contract's value. The fraction is supplied for the illustration, rather than derived from calendar dates.
A covered-event cash settlement. In a separate case, stipulate that the covered event and every required settlement condition are satisfied. If the contractual reference settlement price is 40% of par, the seller owes
That price is a settlement input, not a forecast of the reference entity's eventual recovery rate. This case does not calculate accrued event-period premium, upfront amounts, fees, collateral, funding or tax. Subtracting Case A's receipt from Case B's payment would combine different scenarios into an unsupported profit number.
Signed amounts are from the seller’s perspective. The two cases are separate, not a combined profit calculation; no event-period premium or collateral is calculated.
The obligation starts before a payout is due
A seller can lose market value before a covered event. If newly available protection becomes more expensive while the existing contract's coupon stays fixed, the old contract can become a liability to its seller. A fixed coupon can also coexist with an upfront balancing payment; the coupon alone does not describe the trade's economics. Bomfim's Federal Reserve primer, §§6.5–7, explains these distinctions.
Managing that obligation involves three different questions:
- Loss capacity. How much loss can the portfolio absorb if the reference entity deteriorates or several names fail together? Limits and capital planning should address the contingent loss, not merely premium income. Any regulatory capital requirement depends on the institution, jurisdiction and applicable framework; the notional is not itself a universal capital requirement.
- Cash availability. Can the seller fund settlement and any earlier collateral calls under its agreements? A position with sufficient long-term loss capacity can still face a cash shortage. The Federal Reserve primer's AIG discussion illustrates how collateral demands can create pressure before losses from actual defaults dominate.
- Hedge reliability. Buying offsetting protection may reduce net credit exposure, but matching notional alone is insufficient. Entity, maturity, covered events, seniority and settlement terms matter; another counterparty's failure can leave the original obligation outstanding. A hedge also needs an executable market. The ESRB's CDS market study documents concentration and liquidity concerns in single-name markets.
Selling protection can express a credit view or form one side of a dealer's matched business. The useful comparison is the compensation for the risks and resources committed. Premium collection by itself establishes neither free yield nor guaranteed profit.
Sources
- ISDA, Credit Derivatives Disclosure Annex, July 2021, pp. 1–4 and “Settlement Methods”: seller obligations, valuation factors and contract-specific settlement. ISDA-authored text hosted by Deutsche Bank.
- Antulio N. Bomfim, Credit Default Swaps, FEDS 2022-023, §§2, 4, 6.2–6.5 and 7: seller exposure, collateral, mark-to-market and fixed coupons/upfront payments.
- ESRB, Credit default swaps — analysis and policies, November 2025, §§2.1 and 3.4–3.6: risk transfer, liquidity and concentration.
- John C. Hull, Options, Futures, and Other Derivatives, ninth Global Edition (Pearson, 2018), §25.1, pp. 594–597: premium and protection cash flows, accrual and settlement.