Credit Default Swap

The Five Structural Elements

Every credit default swap contract is defined by five elements. The protection buyer is the party acquiring credit protection, paying the periodic premium and receiving the contingent payment if a credit event occurs. 

The protection seller is the party providing that protection, receiving the premium and bearing the obligation to make the contingent payment. 

The reference entity is the third-party borrower — a corporation, sovereign government, or other entity — whose creditworthiness is the subject of the contract. The reference entity is not a party to the CDS and has no knowledge the contract exists. 

The notional amount is the face value of the exposure being protected, used to calculate both the periodic premium and the contingent settlement payment. The credit event definition specifies the circumstances that trigger settlement.

The Premium — The CDS Spread

The protection buyer pays the protection seller a periodic premium expressed as an annualised percentage of the notional amount, quoted in basis points and called the CDS spread. A CDS spread of two hundred basis points on a ten-million-dollar notional means the buyer pays two hundred thousand dollars annually, structured as quarterly payments of fifty thousand dollars each.

The CDS spread is the market's real-time assessment of the reference entity's credit risk. When the reference entity's perceived creditworthiness deteriorates, the spread widens — protection becomes more expensive because the probability of a credit event has increased. 

When creditworthiness improves, the spread tightens. The CDS spread on a given entity therefore serves as a continuous market-derived credit risk signal, often more timely than formal credit rating agency actions because it reflects live market prices rather than periodic rating reviews.

Credit Events Under ISDA Documentation

The International Swaps and Derivatives Association standardised CDS documentation beginning in 1999 and comprehensively updated the definitions in the 2003 ISDA Credit Derivatives Definitions, which govern the vast majority of CDS contracts globally. 

The 2003 definitions identify three primary credit events applicable to corporate reference entities: bankruptcy, meaning the reference entity files for or is placed into insolvency proceedings; failure to pay, meaning the reference entity misses a scheduled principal or interest payment above a specified minimum threshold after any applicable grace period; and restructuring, meaning the terms of the reference entity's debt are modified in a way that is adverse to creditors, such as a reduction in interest rate, extension of maturity, or subordination of the obligation.

The ISDA Determinations Committee — a body of major dealers and buy-side firms — rules on whether a credit event has occurred when disputes arise, providing a standardised adjudication mechanism that prevents individual counterparties from unilaterally determining their own settlement obligations.

Settlement After a Credit Event

When the Determinations Committee confirms a credit event, the contract proceeds to settlement through one of two mechanisms.

Physical settlement requires the protection buyer to deliver the reference obligation — typically a bond or loan of the reference entity — to the protection seller, who pays par value in return. 

The protection seller effectively purchases a defaulted obligation at par, suffering a loss equal to the difference between par and the obligation's actual market value. Physical settlement was the original standard but has been largely superseded by cash settlement for its complexity when large numbers of contracts reference a single entity.

Cash settlement, now the market standard, requires the protection seller to pay the protection buyer the difference between the notional amount and the recovery value of the reference entity's obligations. The recovery value is determined through an ISDA-administered auction in which major dealers submit bids and offers for the defaulted debt, establishing a market-derived recovery rate that applies uniformly to all contracts referencing that entity. If the auction produces a recovery rate of twenty-five percent, protection sellers pay seventy-five percent of the notional amount to protection buyers. The auction mechanism ensures consistent settlement across the entire market and eliminates disputes about which specific bonds should be valued and at what price.

Hedging Applications

The fundamental hedging use of a CDS is to allow a holder of a bond or loan to transfer the credit risk of that exposure to a protection seller while retaining ownership of the underlying instrument. 

A fixed income fund manager holding ten million dollars of corporate bonds can purchase CDS protection on the same reference entity for the remaining life of the bonds, effectively creating a synthetic position with no net credit risk. 

If the company defaults, the CDS pays out to offset the loss on the bonds. If the company remains solvent, the fund pays the CDS spread — the cost of the hedge — and retains the bond's coupon income. The bondholder's ownership of the instrument is entirely separate from the credit risk transfer, which is what the CFA Institute describes as the defining characteristic of the credit default swap: the separation of credit risk from other risks.

Banks use CDS extensively to manage the credit risk concentrations that arise from large lending relationships. A bank that has extended substantial credit to a corporate borrower and wishes to reduce regulatory capital requirements against that exposure may purchase CDS protection, thereby transferring the economic credit risk while maintaining the lending relationship that generates fee income and deposit business.

Speculative Applications and Naked CDS

A naked CDS is a position in which the protection buyer does not own the underlying reference obligation being insured. The buyer has no direct credit exposure to the reference entity and is instead making a purely speculative bet that the reference entity's creditworthiness will deteriorate, causing the spread to widen and the CDS position to appreciate in value.

Speculative CDS positions allow investors to express negative credit views without borrowing and selling bonds — a process that is often difficult or expensive in the corporate bond market. If an investor believes a company's financial position is worse than the market appreciates, buying CDS protection creates a position that profits when spreads widen, without requiring any bond ownership. Conversely, selling CDS protection is equivalent to a leveraged long position in the reference entity's credit, generating premium income in exchange for bearing the contingent payment obligation.

CDS Indices — CDX and iTraxx

In addition to single-name contracts referencing individual entities, the CDS market includes standardised index products that reference baskets of reference entities. The CDX North America Investment Grade index, commonly called CDX.NA.IG, tracks one hundred and twenty-five of the most liquid single-name CDS on North American investment grade corporate reference entities in an equal-weighted portfolio, with the composition reviewed and refreshed every six months by Markit, now part of IHS Markit. The CDX North America High Yield index performs the same function for high yield reference entities. The European equivalents are the iTraxx indices, covering European investment grade and crossover credits.

CDS index products are the most actively traded instruments in the credit derivatives market. They provide investors with a single transaction that hedges or expresses views on broad credit market conditions rather than individual name risk. When credit spreads widen broadly — as they do during recessions and financial stress — an investor holding CDX protection benefits from the widening across all one hundred and twenty-five reference entities simultaneously. Because index products are standardised and deeply liquid, they are also used by the Federal Reserve and academic researchers as real-time indicators of aggregate credit market stress.

AIG and the 2008 Crisis — The Systemic Risk of Uncollateralised Protection Selling

AIG Financial Products, a subsidiary of American International Group operating from offices in London and Connecticut, was the most consequential protection seller in the pre-crisis CDS market. By 2007, AIG Financial Products had written approximately five hundred and twenty-seven billion dollars in notional CDS protection, primarily on senior tranches of collateralised debt obligations backed by subprime residential mortgages. AIG's management and regulators believed the senior tranche positions were extremely safe — the probability of actual default losses reaching the senior tranches was assessed as negligible — and therefore AIG posted minimal collateral against these positions.

The critical flaw in that assessment was the failure to account for mark-to-market collateral calls. AIG's CDS contracts with its counterparties — major Wall Street dealers — included collateral posting requirements triggered not by actual defaults but by declines in the market value of the referenced tranches. As subprime mortgage values collapsed through 2007 and 2008, counterparties made escalating collateral calls on AIG, demanding billions of dollars in cash to cover the declining mark-to-market value of the protection AIG had sold. AIG lacked the liquidity to meet these calls. When its credit ratings were downgraded in September 2008, the collateral calls accelerated dramatically. The United States government provided an initial eighty-five-billion-dollar emergency credit facility on September 16, 2008, and ultimately committed over one hundred and eighty billion dollars to prevent AIG's collapse — which would have triggered cascading defaults across every counterparty that had purchased protection from AIG without the payment being honoured.

The AIG episode demonstrated that the CDS market, by allowing a single institution to accumulate enormous concentrated credit risk through protection-selling without adequate regulatory oversight or mandatory collateralisation, had created systemic risk invisible to regulators. As the CFTC chairman testified before the Financial Crisis Inquiry Commission, at its peak the overall CDS market had a notional value of approximately sixty trillion dollars — approximately four times annual United States GDP — with no central clearing, no mandatory margin, and no position limits.

Post-Crisis Regulation — Title VII of the Dodd-Frank Act

Title VII of the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 implemented comprehensive reform of the CDS and broader swaps market, amending both the Commodity Exchange Act and the Securities Exchange Act of 1934 to bring swaps under regulatory supervision for the first time.

The Dodd-Frank Act divided regulatory authority over swaps between the Commodity Futures Trading Commission and the Securities and Exchange Commission. The CFTC has primary authority over most swaps, including CDS index products referencing multiple entities. The SEC has authority over security-based swaps, defined as swaps on a single security or narrow index — meaning single-name CDS referencing individual corporate or sovereign entities fall under SEC jurisdiction.

The Act's three central structural reforms addressed the specific vulnerabilities exposed by the AIG collapse. Mandatory clearing requires that standardised swap contracts, including the major CDX and iTraxx index CDS products, be submitted for clearing to a derivatives clearing organisation registered with the CFTC. Central clearing interposes a well-capitalised central counterparty between the protection buyer and seller, eliminating bilateral counterparty risk and ensuring that a default by any single market participant does not propagate through the entire network. The CFTC issued its first clearing determination under Dodd-Frank in November 2012, requiring clearing for specified CDX and iTraxx index CDS and certain interest rate swaps. Mandatory margin requirements ensure that both cleared and uncleared CDS positions are supported by adequate initial and variation margin, preventing the kind of uncollateralised risk accumulation that allowed AIG to write hundreds of billions in protection with minimal posted collateral. Mandatory trade reporting requires that all swap transactions be reported to a swap data repository, providing regulators with comprehensive visibility into market positions and concentration risks.

Examination Relevance and Key Takeaways

Credit default swaps are tested on the Series 65 and Institutional Series examinations in the context of credit derivatives, risk transfer mechanisms, the 2008 financial crisis, and the Dodd-Frank regulatory framework.

The core points to retain are these: a credit default swap is a bilateral contract in which the protection buyer pays a periodic CDS spread in basis points of the notional amount to the protection seller in exchange for a contingent payment if a credit event — bankruptcy, failure to pay, or restructuring as defined in the 2003 ISDA Credit Derivatives Definitions — occurs with respect to the reference entity; the reference entity is a third party not itself a party to the contract; the CDS spread is a live market signal of perceived credit risk, widening when creditworthiness deteriorates and tightening when it improves; cash settlement through an ISDA-administered auction is the current market standard, with the protection seller paying the buyer the notional amount minus the auction-determined recovery value; hedging applications allow bondholders and lenders to transfer credit risk while retaining the underlying exposure, while speculative applications including naked CDS allow investors to express views on creditworthiness without owning the reference obligation; CDS index products including CDX.NA.IG referencing one hundred and twenty-five North American investment grade entities are the most liquid credit derivatives instruments; AIG Financial Products accumulated five hundred and twenty-seven billion dollars in notional CDS protection-selling positions concentrated in subprime CDO tranches, and its inability to meet mark-to-market collateral calls in September 2008 required over one hundred and eighty billion dollars in government support and directly caused the mandatory clearing, margin, and reporting reforms enacted in Title VII of the Dodd-Frank Act; and under Dodd-Frank, the CFTC has authority over CDS index products while the SEC has authority over single-name security-based CDS.