What Is Counterparty Credit Risk?
Counterparty credit risk is the risk that a party to a contract defaults before meeting its obligations, on an exposure whose size varies with market prices rather than being fixed. It differs from ordinary lending because the amount at risk is unknown at the outset and can change direction entirely.
Lend somebody money and you know exactly what you stand to lose. Enter a swap with them and you stand to lose an amount that does not exist yet, and may never.
How it works
A contract creates an obligation to be met later. Between agreement and settlement, either side might cease to exist.
The exposure is the replacement cost. If the counterparty vanishes, you must replace the contract at current prices, and the loss is the difference between the old terms and the new ones.
A swap is worth zero at inception. There is no exposure on day one; it appears purely because the market moved, which is unlike any lending relationship.
Why it is harder than lending risk
The exposure is bilateral. In a loan only the lender is exposed. In a derivative each side may end up owing the other, so both must assess the other’s credit.
And it must be estimated across the contract’s life, not measured today. What matters is how large the exposure could plausibly become before maturity, which requires a distribution rather than a number.
Which is why the industry uses potential future exposure. A percentile of the modelled distribution of what the contract could be worth, at each point in its life, rather than its current value.
A worked example
Two parties enter a ten-year swap. On day one it is worth zero to both, and neither has any exposure to the other.
Rates move over two years and the swap is now worth 8 million to party A. Party A has an 8 million credit exposure to party B that did not exist when they signed.
Party B defaults. Party A must replace the swap at current market terms, which costs approximately that 8 million, and it ranks as an unsecured creditor for the amount.
Now reverse the rate move. Party B would have had the exposure instead, to A, of a similar size — which is why both parties assessed each other’s credit before signing anything.
Wrong-way risk
The dangerous case is exposure that grows as the counterparty weakens. If the thing causing your counterparty to fail is the same thing making the contract valuable to you, the two risks are not independent.
A concrete shape. Buying protection against a company’s default from a bank heavily exposed to that same company means the protection is worth most when the seller is least able to pay.
Or a currency example. A swap that pays you when a country’s currency collapses, transacted with a bank in that country, is a claim that becomes large at the moment the institution behind it is under maximum strain.
Which is why the discipline treats wrong-way risk separately. Ordinary counterparty exposure can be modelled as market moves and default probability multiplied together; wrong-way risk breaks that assumption, and it is where the largest surprises have historically come from.
The original data
On this site’s shared series direction runs average 2.01 bars with a longest of 11, the ninetieth percentile bar is 1.101 and the largest is 2.338.
An uncollateralised exposure accumulates across a run. An eleven-bar move in one direction, with nothing settling, is a substantial obligation built from ordinary daily moves rather than from any single dramatic event.
And replacing a contract costs the spread: 0.0098 per round trip on this site’s series, about 2% of the median bar range of 0.493 — a cost the surviving party pays on top of the loss, and one that widens in exactly the conditions where a default occurs.
How it is actually managed
Netting agreements. A master agreement covering many trades means only the net amount is owed on default, rather than every losing contract being claimed while every winning one is repudiated.
Collateral. Exposure above a threshold is covered by assets posted daily, which converts credit risk into liquidity risk and operational risk — better risks, and not no risk.
Central clearing. Standardised contracts are novated to a clearing house, which replaces the counterparty entirely.
And pricing. The cost of counterparty credit is charged into the trade as a valuation adjustment, so a weaker counterparty receives a worse price rather than being refused — which is the market’s way of handling a risk it cannot eliminate.
The valuation adjustments
CVA is the credit valuation adjustment - the expected loss from the counterparty defaulting, priced into the trade and charged to the client rather than absorbed quietly.
DVA is the same calculation pointing the other way, the value of your own possible default to you, which is correct in theory and deeply uncomfortable in practice: a firm’s own deterioration creates an accounting gain.
And FVA covers the funding cost of the collateral an uncollateralised trade obliges the dealer to post elsewhere, which is a real expense somebody has to carry.
Together they mean the quoted price contains credit. Two clients asking for the same trade get different prices based on their own standing, which is the market pricing a risk rather than refusing it.
When it fails
The characteristic failure is netting that does not hold up. A firm calculates its exposure on the assumption that gains and losses across hundreds of contracts with one counterparty will offset on default. That offset depends on a master agreement being enforceable in the counterparty’s jurisdiction, in insolvency, against an administrator with incentives of their own. Where the legal opinion turns out to be optimistic, the net exposure that was carefully managed becomes a gross exposure that was never sized for, and the difference between those two numbers is enormous.
A second failure is ignoring wrong-way risk, where exposure and default probability rise together.
A third is treating collateral as complete protection. It is revalued with a lag, and a gap move happens between valuations.
A fourth is modelling potential exposure from calm data, which understates the distribution’s tail.
And a fifth is forgetting it is mutual. Your counterparty is running the same analysis on you, and your own deterioration changes what they will trade.
Related
Counterparty risk covers the general exposure to the other side. Clearing house covers the institution built to remove it. And interest rate swap covers the contract type where this risk is most studied.
A loan has a known amount at risk from day one. A derivative does not — it starts at zero and becomes an exposure only because prices moved. That single difference is why this risk needed its own discipline and its own vocabulary.
— Michael Whitman
This page is educational, not financial advice. Test every idea on your own charts before risking money.