Counterparty Risk and Guarantee Systems

Counterparty risk management in financial infrastructure
Counterparty risk—the risk that one of the parties to a transaction will fail to fulfill its obligations—is a fundamental problem of financial markets. Financial infrastructure has developed numerous mechanisms to manage this risk, from margin requirements to central counterparties.

Nature of counterparty risk
Counterparty risk arises in any transaction with deferred execution. If there is a period between the conclusion and execution of the transaction, there is a probability of default by one of the parties. The longer the period and the greater the potential exposure, the higher the risk.

Replacement cost risk—expenses incurred to replace a contract with a defaulted counterparty. If the market has moved in your favor, you lose unrealized profit.

Settlement risk—risk at the moment of settlement, when one party has already fulfilled its obligations and the other has not.

Wrong-way risk—an especially dangerous situation in which the probability of counterparty default correlates with the size of the exposure. For example, if a bank has sold CDS on a corporate default, its exposure to the protection seller grows precisely when this seller is itself under stress.

Margin requirements
Margin is collateral contributed by participants to cover potential losses. Initial margin is provided upon opening a position and covers expected losses during the liquidation period. Variation margin is a daily mark-to-market calculation, transferring unrealized profits and losses.

Margin calculation is based on asset volatility, liquidation period, and confidence level. VaR-like models determine the margin size sufficient to cover losses with a given probability (usually 99%).

Margin call—a requirement to add margin when the market moves unfavorably. Failure to meet a margin call leads to forced liquidation of the position. This creates pro-cyclical dynamics: price declines cause margin calls, forced sales intensify the decline.

Central Counterparty (CCP)
A CCP becomes the buyer for every seller and the seller for every buyer, breaking bilateral links between participants. Instead of a network of mutual exposures, a hub-and-spoke structure with the CCP at the center is formed.

Advantages of a CCP: multilateral netting reduces the total volume of exposures; standardization of margin requirements; professional risk management; predictable default management process.

A CCP uses a multi-tiered protection system (waterfall). The first level is the margin of the defaulting participant. The second is their contribution to the guarantee fund. The third is the CCP’s own capital (skin in the game). The fourth is the guarantee fund of other participants.

CCP risks
Risk concentration in the CCP creates systemic vulnerability. If a CCP cannot cope with a major default, the consequences will affect all participants.

Regulators have recognized CCPs as systemically important and imposed enhanced supervision. Recovery and resolution plans define actions in the event of a threat to CCP solvency. Possible tools: additional member contributions (assessment), forced position reduction (tear-up), bail-in of capital.

Bilateral counterparty risk management
Not all trades are cleared through a CCP—many OTC derivatives remain bilateral. For these, risk management mechanisms have been developed: Credit Support Annexes (CSA) to ISDA agreements determine the procedure for exchanging collateral; bilateral netting reduces exposure.

Credit Valuation Adjustment (CVA)—adjustment to the value of derivatives for counterparty risk. After 2008, CVA became a mandatory element of pricing. Major banks have CVA desks that trade and hedge this risk.

Practical implications
It is important for investors to understand the counterparty risk of instruments used. Exchange-traded futures are protected by the CCP—counterparty risk is minimal. OTC swaps can carry substantial risk, depending on the counterparty’s credit quality and CSA terms.

Choosing a broker and custodian involves assessing their creditworthiness. Segregation of client assets protects against intermediary bankruptcy, but not completely—events like MF Global revealed gaps in protection.