# Dealers disagree over charge for CCP counterparty risk

## Fed stress tests push US banks towards charging CVA for cleared derivatives

Amid the increasing use of central counterparties (CCPs) for over-the-counter derivatives, major dealers have adopted different approaches to adjusting the value of cleared trades to account for counterparty credit risk.

Several large dealers tell Risk.net they are taking a credit valuation adjustment (CVA) charge to reflect the counterparty risk of centrally cleared trades, or reporting the charge for regulatory purposes. However, the practice is far from universal, with US banks embracing the idea more readily than their European competitors.

“A CCP is a counterparty like any other counterparty,” says one risk manager at a large US bank. “It’s entirely logical that normal approaches to counterparty risk management should be used to address the risk they pose.”

But others disagree. In an illustration of the differences between banks, one London-based CVA trader says the counterparty risk of CCPs can’t be modelled or hedged, while the level of risk is minimal.

“There is probably a risk, but the risk is very much like a black swan,” he says. “First, the CCP is very unlikely to default, so the probability of default is very low. Second, it has got a very secure exposure, so the loss at default is reduced. Third, you can’t model it or hedge it, so there isn’t a lot of added value to monitor CVA on CCPs.”

With the inception of mandatory clearing under rules such as the European Market Infrastructure Regulation and the US Dodd-Frank Act, an increasing volume of OTC derivatives is being cleared via CCPs. By design, CCPs are meant to have very little counterparty risk: to cover potential losses, clearing members are required to post both initial margin and variation margin against their trades, and must also contribute to a sizeable default fund – typically one that is large enough to withstand the simultaneous default of its two largest members.

But CCPs are not risk-free, argue risk managers. Even if the CCP did not itself go bankrupt, dealers could stand to lose money if another large clearing member went bust and the resulting losses blew through the defaulting members’ initial margin and default fund contribution, as well as the CCP’s own capital.

### A calculated risk

The issue of CVA for centrally cleared transactions raises challenges – not least, on the question of how to calculate the charge. “We are not using CVA for CCPs, but have discussed doing so,” says a risk manager at a large European bank. “However, given that there are no CVA spreads observable, we decided not to take a CVA charge.”

To judge the level of risk posed by a derivatives counterparty, banks would normally refer to the probability of default implied by credit default swap (CDS) spreads. But there is no liquid CDS market for CCPs.

Another option is to use credit ratings. In January, New York-based rating agency Moody’s Investors Service began assigning ratings to various clearing services using a methodology based on factors such as the products cleared, the CCP’s business model and the level of government support it might expect to receive.

However, some banks are critical of the agency’s methodology, and others say a more sophisticated approach is needed. “One of the simplest, naive approaches is just to say CVA for CCPs is no different than CVA for any other counterparty – so, you can use a rating-based credit curve to compute CVA,” said Youssef Elouerkhaoui, global head of credit quantitative analysis at Citi, addressing delegates at the Quant Summit Europe conference in London on April 13.

We calculate CVA on CCPs every day, not just for CCAR
A quant at a large US bank

A more rigorous way to compute CVA for CCPs, said Elouerkhaoui, would be to look at the CCP’s default waterfall in the same manner as a collateralised debt obligation (CDO). “CCPs and CDOs are very similar to some extent,” he said. “When a default happens on a CCP, we have a waterfall: the name goes bust, releases initial margin, releases guarantee fund, and so on, to pay for the losses on the default. So there is whole waterfall structure for the default payout of the CCP.”

#### 7 days in 60 seconds

###### Pandemic disruption, alt data and Argentinian rates problems

The week on Risk.net, March 21–27, 2020