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An over-the-counter (OTC) swap is a privately negotiated derivatives contract whose value changes as interest rates, currencies, credit spreads, equity prices, commodities, or another reference variable moves. One party can therefore be owed money today even though no principal was exchanged when the trade began. If the owing counterparty defaults before paying or the position can be closed out, the owed market value becomes counterparty credit exposure.
The controls fit together in a specific order: the parties calculate a current mark-to-market value, exchange variation margin for that current exposure, exchange initial margin for possible value changes during a closeout period, and rely on collateral, netting, documentation, and sometimes central clearing to reduce—but not eliminate—losses. The exact obligations depend on the swap documents, the parties, the jurisdiction, and whether the trade is cleared.
What an OTC swap is and why its risk changes
A swap is an agreement to exchange cash flows according to a formula. Common examples include exchanging fixed interest for floating interest, one currency’s cash flows for another’s, or payments linked to a commodity, equity index, or credit event. “OTC” means the contract is negotiated directly between counterparties or through dealers rather than traded on a standardized exchange order book.
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The contract normally has a current market value and a possible future value. At inception, an appropriately priced swap may have little or no value to either side. As market variables move, the expected cash flows change and one side’s position becomes positive while the other side’s becomes negative. The positive side is the party that would lose value if the other party failed to perform.
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Three risks should be kept separate:
- Market risk: the swap’s value moves because the underlying rate, price, spread, index, or exchange rate changes.
- Counterparty default risk: the other party fails when the contract has positive value to you.
- Credit valuation adjustment (CVA) risk: the swap’s mark changes because the market’s view of the counterparty’s creditworthiness changes, even if the underlying market factor does not move.
The Bank for International Settlements describes counterparty credit risk as a hybrid of credit and market risk because it depends on both the counterparty’s creditworthiness and movements in underlying market factors. A swap can be economically risky without creating a loss from default, and a default matters financially only to the extent that a positive, unpaid exposure exists after closeout and recovery.
How exposure is created during the swap’s life
1. Cash-flow terms create a changing claim
Each payment date produces an amount calculated under the contract. For an interest-rate swap, that may be the difference between a fixed-rate amount and a floating-rate amount for an accrual period. For a cross-currency swap, amounts can depend on two interest-rate curves and an exchange rate. The contract’s remaining expected payments are re-estimated whenever relevant market data changes.
2. A positive mark becomes exposure if payment is interrupted
Suppose Party A’s current mark is positive because the remaining payments it expects are worth more than the payments it owes. Party A is not automatically holding cash equal to that value; it has a contractual claim. If Party B defaults, Party A must terminate or replace the trade and calculate a closeout amount. The loss is generally related to the positive replacement value, reduced by enforceable netting, collateral that can actually be applied, and amounts recovered from the defaulting estate.
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If rates or prices move in the opposite direction, the same swap can become positive to Party B. Margin transfers can therefore reverse direction as marks change. A party that was protected by collateral yesterday may need to post collateral today. This is why exposure is monitored repeatedly rather than treated as a fixed amount for the entire term.
How an OTC swap is valued
Valuation is the process of estimating what the swap is worth at a stated time using the contract’s cash-flow rules, market data, and an agreed methodology. The result is usually called a mark-to-market value. It is the starting point for deciding who owes current value and how much variation margin is due.
What a valuation process normally specifies
- The market data sources, curves, prices, exchange rates, volatility inputs, and credit assumptions to use.
- The calculation conventions, such as payment calendars, business-day adjustments, compounding, and day-count rules that appear in the trade confirmation.
- When valuations are produced and delivered, often on each business day for transactions subject to daily margining.
- How to handle a missing price, a market disruption, an illiquid input, or a disagreement over an input.
- How the parties escalate and resolve a valuation dispute, including any independent calculation or third-party determination.
The parties should agree these provisions for the life of the swap rather than inventing a method after a default. A 2013 CFTC rulemaking order, in its specific US regulatory setting, emphasized that documented valuation agreements and dispute procedures are central to OTC derivatives risk management. Its statement that determining a swap’s value is “a cornerstone of risk management” should be understood as an official explanation of that rulemaking, not as a universal statement that overrides current law or a negotiated contract.
Valuation is not the same as a guaranteed liquidation price
A mark is an estimate based on available information and agreed methods. In a stressed or illiquid market, bid-offer spreads can widen, prices can be unavailable, and replacing the position can cost more than a model mark. Closeout provisions therefore matter: they specify how the final amount is determined after termination and which costs, gains, losses, and collateral balances are included.
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Variation margin and initial margin
The two types of margin answer different questions. Variation margin addresses the exposure shown by the current mark. Initial margin addresses the possibility that the mark will move further while a defaulted position is being closed out or replaced.
| Margin type | Risk it addresses | Typical direction and timing | Important limitation |
|---|---|---|---|
| Variation margin (VM) | Current mark-to-market exposure | The party currently out of the money transfers collateral to the party in the money, often on a regular schedule such as daily | It reflects the calculated mark at the margin time; it cannot fully cover a move before the next transfer or a settlement delay |
| Initial margin (IM) | Potential future exposure during the closeout period after default | Covered parties generally exchange it in both directions and hold it separately from current-payment collateral | It is calibrated to a potential move and does not guarantee that every closeout loss will be covered |
How variation margin works
If the agreed mark says Party A owes Party B 4 million units of currency and the contract’s threshold and minimum-transfer terms require a transfer, A posts VM to B. If a later mark says B owes A, the collateral direction can change. VM reduces the amount of unsecured current exposure, but it depends on timely valuation, settlement, and the ability to return or reuse collateral under the documents.
How initial margin works
Initial margin is intended to cover a plausible change in value between the last successful margin exchange and the time the non-defaulting party can close out or replace the trade. The BIS summary of the BCBS-IOSCO framework describes IM as a two-way exchange for covered entities and notes that collected IM may be protected through arrangements such as third-party custody. IM is generally not netted against the amount the other party collects from you; each side’s posted amount is treated as protection against its own potential future exposure.
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Scope is defined, not universal
The BCBS-IOSCO framework summarized by the BIS applies to specified non-centrally cleared OTC derivatives and covered financial firms or systemically important non-financial entities. National rules determine which entities, products, thresholds, and implementation dates are actually covered. A statement that “all swaps require IM” or “every OTC trade is margined daily” is therefore too broad. Read the applicable regulation and the executed credit-support documents for the specific trade.
What collateral does—and the risks it introduces
Collateral lowers loss only if it is eligible, correctly valued, available when needed, legally enforceable, and deliverable through the settlement and custody process. Cash and securities may be permitted, but the credit-support agreement controls the list, currencies, concentration limits, valuation frequency, and rights to use or hold the assets.
Eligibility and haircuts
Supervisory guidance favors collateral that is liquid, likely to retain value in stress, reasonably diversified, and not exposed to excessive credit, market, or foreign-exchange risk. A haircut reduces the amount of market value recognized for margin purposes. For example, an asset valued at 10 million may count for less than 10 million after the applicable haircut; the exact percentage comes from the agreement or rule, not from a universal OTC standard.
Wrong-way risk
Wrong-way risk occurs when the collateral becomes less valuable at the same time the counterparty’s ability to pay deteriorates. Collateral issued by, or strongly linked to, the counterparty can therefore provide less protection precisely when it is needed. Concentration in one issuer, one market, or one currency can create a similar weakness.
Legal, custody, liquidity, and operational risks
- Legal enforceability: insolvency, collateral-characterization, closeout, and netting rights may differ across jurisdictions. A written agreement is not enough if a court will not enforce it in the relevant insolvency.
- Custody and access: segregated assets can protect IM, but the non-defaulting party must still be able to access and realize them without an unacceptable delay.
- Liquidity: an asset that is eligible on paper may be difficult to sell without a large discount during a stressed market.
- Operations: failed deliveries, stale prices, incorrect substitutions, and reconciliation breaks can leave exposure uncollateralized.
- Disputes: disagreements about marks, haircuts, eligibility, or settlement amounts can delay a required transfer.
Industry operational guidance, including the collateral practices published by ISDA, is suggested rather than binding. The parties must follow their own agreements and applicable regulations, with controls for eligibility testing, valuation, calls, substitutions, settlement, reconciliation, and dispute escalation.
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Netting and central clearing
Bilateral netting
A legally enforceable bilateral netting agreement can allow multiple transactions with the same counterparty to be treated as one net exposure after a default. Gains on some swaps can offset losses on others, reducing the amount that must be collected. Netting is not automatic: it normally requires a qualifying agreement, a defined netting set, consistent documentation, and enforceability in each relevant jurisdiction. Unrelated counterparties cannot simply be netted because their trades are recorded in the same system.
Central clearing
In a centrally cleared swap, a derivatives clearing organization becomes the counterparty through novation or a similar legal mechanism. The clearing house collects margin, applies its default-management procedures, and can net eligible obligations across a participant’s cleared positions. Credit risk is transferred from a direct bilateral relationship to the clearing organization and its risk-management structure.
| Question | Bilateral OTC trade | Centrally cleared trade |
|---|---|---|
| Direct credit relationship | The two original counterparties face each other, subject to any guarantor or affiliate structure | Each participant faces the clearing organization under clearing rules |
| Netting | Depends on an enforceable bilateral netting agreement and defined netting set | Performed under the clearing house’s rulebook for eligible positions |
| Margin and default process | Set by applicable regulation and the parties’ credit-support documents | Set by clearing rules, margin models, default-fund arrangements, and participant requirements |
| Main residual concerns | Counterparty credit, collateral, legal enforceability, valuation, and operational execution | Clearing-house, member, liquidity, default-waterfall, concentration, and operational risks |
Clearing changes the risk structure rather than removing risk. A clearing organization must manage participant defaults, settlement, product eligibility, funds protection, liquidity, and its own recovery or wind-down procedures. Concentrating risk-management importance in the clearing house also means that its rules, margin calls, and access requirements become critical to every participant.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What happens when a counterparty defaults
- Identify the event and suspend or manage payments. The agreement and applicable law determine whether the event permits termination, acceleration, or other protective action.
- Calculate the closeout amount. The surviving party values replacement transactions or the terminated portfolio using the documented methodology and market data available at the time.
- Apply netting. Eligible gains and losses within the enforceable netting set are combined rather than settled trade by trade.
- Apply collateral. VM, IM, and other permitted collateral are valued, liquidated, or transferred according to the credit-support and custody arrangements.
- Determine the remaining claim or payment. If the closeout amount exceeds recoverable collateral, the surviving party has an unsecured or otherwise prioritized claim for the balance. If collateral exceeds the amount owed, the excess is returned as required.
- Resolve disputes and recovery. Contractual dispute procedures, insolvency rules, and any clearing-house default waterfall govern disagreements and losses that remain.
Initial margin is designed for the time between the last margin exchange and steps such as closeout or replacement; it is not a promise that liquidation will be immediate or lossless. Market gaps, illiquid prices, legal stays, and operational delays can still create an uncovered amount.
Documentation and controls to check before trading
A practical review should answer these questions in writing:
- Which document governs the swap, collateral, events of default, valuation, and closeout?
- What is the exact valuation method, data source, timing, and independent-dispute process?
- Which trades belong to the same legally enforceable netting set?
- What are the VM and IM thresholds, minimum transfer amounts, call deadlines, currencies, and settlement instructions?
- Which assets are eligible, what haircuts and concentration limits apply, and who may hold or reuse them?
- Is IM segregated, and can the protected party access it promptly after a default?
- How are substitutions, failed settlements, reconciliations, market-data outages, and valuation disputes escalated?
- Is the trade required or permitted to be centrally cleared, and what clearing-member, default-fund, liquidity, and intraday-margin obligations follow?
- Which jurisdictions’ insolvency and netting laws apply, and has enforceability been assessed for each one?
These controls address different failure modes. Better valuation does not cure an unenforceable netting agreement; more collateral does not cure an inability to access it; and central clearing does not remove liquidity or operational risk.
Common misconceptions
“Collateral means there is no counterparty risk.”
Collateral reduces exposure only to the extent that it is sufficient, liquid, correctly valued, accessible, and enforceable. Haircuts, price gaps, settlement delays, and closeout costs leave residual risk.
“Initial margin is just another name for variation margin.”
VM covers the current mark. IM is protection against a possible change during closeout. They have different purposes, calculation approaches, custody expectations, and legal treatment.
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A positive mark is a contractual claim. Until payment or effective collateralization, the holder remains exposed to the counterparty’s ability and willingness to perform.
“Clearing eliminates default risk.”
Clearing substitutes a clearing organization and its members for the original bilateral relationship. It can net and mutualize or transfer credit risk, but it introduces dependence on the clearing house, members, default procedures, liquidity, and rulebook.
“A model disagreement is harmless.”
If the parties disagree about the mark, they may disagree about the margin call itself. Documented inputs, independent checks, and a defined dispute path are therefore risk controls, not administrative extras.
Bottom line for evaluating an OTC swap
Start with the direction and size of the current mark, then ask what could change before closeout. Separate market risk, default risk, and CVA risk. Check whether VM addresses today’s exposure and whether IM, collateral quality, netting, custody, and clearing arrangements address the potential future gap. Finally, verify that valuation, collateral, closeout, and dispute terms are documented and enforceable for the actual parties and jurisdictions. That sequence provides a more reliable risk picture than labeling a swap simply “secured” or “unsecured.”
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