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FRM Exam Part II · Central Clearing

OTC Derivatives Market Structure and Bilateral Clearing

Updated 11 October 2026 · Fact-checked

OTC derivatives are privately negotiated contracts between two parties. In bilateral clearing, each party carries the other's default risk. Risk is cut by close-out netting under an ISDA Master Agreement, which merges all trades into one net amount, and by collateral under a CSA. To solve questions, net first, then deduct collateral.

Understand OTC Derivatives Market Structure and Bilateral Clearing

An over-the-counter (OTC) derivative is a contract negotiated directly between two parties, not on an exchange. Terms such as notional, maturity and payment dates are tailored. Swaps, forwards and many options trade this way. Large dealer banks sit at the centre and trade with each other and with clients such as funds, corporates and pension schemes.

In bilateral clearing, the two parties settle with each other and stay exposed to each other until the contract ends. If your counterparty defaults while the contract has positive value to you, you lose part of that value. If the contract has negative value to you, you still owe it to the defaulted estate. So credit exposure is only on the positive side. Exposure is the larger of the contract value and zero.

The key legal tool is the ISDA Master Agreement, a standard contract that two parties sign once. Individual trades are then added under it through confirmations, and the Schedule customises the terms. All trades under one master agreement form a single agreement. On a default, close-out netting lets the non-defaulting party terminate all trades, value each one, and add them up into one net payment. This stops the administrator from keeping profitable trades and rejecting losing ones, which is called cherry picking. Netting is only reliable if it is legally enforceable in the relevant jurisdictions, usually supported by legal opinions.

The Credit Support Annex (CSA) is a part of the ISDA documentation that sets collateral rules. It covers thresholds, minimum transfer amounts, eligible collateral, haircuts and how often margin is called. Variation margin follows changes in market value. Initial margin is an extra buffer for the move in value between the last margin call and close-out, the margin period of risk. Collateral reduces exposure but does not remove it, because of gaps, thresholds and collateral value changes.

Compare this with central clearing, where a central counterparty (CCP) steps between the two parties through novation and becomes buyer to every seller. Bilateral clearing keeps risk spread across a web of dealers, while a CCP concentrates it and mutualises losses. Post-crisis reforms pushed standardised OTC derivatives to CCPs and added margin rules for those left bilateral.

Key formulas to remember

Exposure on a single trade
Exposure = max(V, 0)
V is the mark-to-market value to you. Only positive value is at risk if the counterparty defaults.
Exposure without netting
Gross exposure = Σ max(Vᵢ, 0)
Each trade is treated separately. Losing trades are ignored.
Exposure with close-out netting
Net exposure = max(Σ Vᵢ, 0)
Applies to trades in one legally enforceable netting set. Never below zero.
Exposure after collateral
Exposure after collateral = max(Net value − Collateral held, 0)
Add any initial margin posted by the counterparty and subtract collateral you posted if it is not segregated.
Netting benefit
Netting benefit = Gross exposure − Net exposure
Always zero or positive. It is zero if all trades have the same sign of value.
Net-to-gross ratio (NGR)
NGR = Net exposure ÷ Gross exposure
Between 0 and 1. Lower means more netting benefit.

How to solve OTC Derivatives Market Structure and Bilateral Clearing questions

Use this order for any bilateral clearing, netting or CSA question.

  1. 1Identify the netting sets: which trades sit under the same ISDA Master Agreement and are legally nettable.
  2. 2Write the mark-to-market value of each trade from your point of view. Use positive for amounts owed to you.
  3. 3Compute gross exposure by summing only the positive values.
  4. 4Compute net exposure by summing all values in the netting set and flooring at zero.
  5. 5Subtract collateral held (variation margin and initial margin) from net exposure, flooring at zero. Check CSA terms such as threshold and minimum transfer amount.
  6. 6Calculate the netting benefit or NGR if asked, and note the loss given default if recovery is stated.
  7. 7State the interpretation: what remains is the residual exposure from gaps, thresholds or the margin period of risk.

Quickest way: Net first, then collateral

When to use it: Use for numerical questions with several trades, a collateral amount and four close answer options.

  1. Add all trade values in the same netting set to get net value.
  2. If net value is negative, exposure to that counterparty is zero.
  3. Subtract collateral held. If the result is negative, exposure is zero.
  4. For gross exposure, add only the positive values.
  5. For conceptual questions, pick the option that says netting is only valid if legally enforceable and that collateral reduces but does not eliminate exposure.

Common mistakes in OTC Derivatives Market Structure and Bilateral Clearing

  • Netting across trades under different master agreements

    Students assume all trades with one bank can be netted.

    Fix: Net only within one netting set under the same enforceable agreement.

  • Allowing negative exposure

    Students sum values and report a negative number as exposure.

    Fix: Floor exposure at zero. A net amount owed by you is not credit exposure to the counterparty.

  • Calling close-out netting the same as payment netting

    Both use the word netting.

    Fix: Payment netting offsets payments due on the same day. Close-out netting terminates all trades on default and gives one net claim.

  • Assuming a CSA removes all counterparty risk

    Collateral sounds like full protection.

    Fix: Remember thresholds, minimum transfer amounts, margin call delays, the margin period of risk and collateral value moves leave residual exposure.

  • Confusing variation margin with initial margin

    Both are collateral.

    Fix: Variation margin tracks current mark-to-market. Initial margin covers potential future moves during close-out.

  • Treating bilateral clearing as risk-free of systemic effects because there is no CCP

    Students focus on CCP concentration only.

    Fix: Bilateral markets have interconnected exposures and opacity, so one default can pass losses through the network.

Worked examples

Example 1

A bank has three trades with one counterparty under a single enforceable ISDA Master Agreement. Values to the bank are +USD 12 million, +USD 5 million and −USD 9 million. Calculate gross exposure, net exposure and the netting benefit.

Show the solution
  1. Gross exposure counts positive values only: 12 + 5 = USD 17 million.
  2. Net value of the set = 12 + 5 − 9 = USD 8 million.
  3. Net exposure = max(8, 0) = USD 8 million.
  4. Netting benefit = 17 − 8 = USD 9 million.

Answer: Gross exposure USD 17 million, net exposure USD 8 million, netting benefit USD 9 million.

Example 2

A bank has trades with a counterparty under an enforceable netting agreement with values of +USD 20 million and −USD 6 million. Its CSA means it holds USD 10 million of variation margin. If the counterparty defaults and the margin is still valid at close-out, what is the bank's residual exposure, and what is the net-to-gross ratio before collateral?

Show the solution
  1. Net value = 20 − 6 = USD 14 million.
  2. Net exposure before collateral = USD 14 million.
  3. Residual exposure = max(14 − 10, 0) = USD 4 million.
  4. Gross exposure = USD 20 million, since only the positive trade counts.
  5. NGR = 14 ÷ 20 = 0.70.

Answer: Residual exposure is USD 4 million and the net-to-gross ratio is 0.70.

Exam tips

  • Read whether trades share one netting set. Questions often add a trade under a separate agreement as a trap.
  • Check the sign convention: values are usually given from the bank's side.
  • Floor every exposure at zero before choosing an answer.
  • For legal questions, link the benefit of close-out netting to enforceability and prevention of cherry picking.
  • In comparison questions, contrast bilateral risk spread across counterparties with CCP concentration and mutualised losses.

Practice questions from Central Clearing

OTC Derivatives Market Structure and Bilateral Clearing in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

OTC Derivatives Market Structure and Bilateral Clearing: frequently asked questions

What is the difference between bilateral clearing and central clearing?

In bilateral clearing the two trading parties face each other until the contract ends. In central clearing a CCP becomes the counterparty to both through novation and manages risk with margin and a default fund.

How does close-out netting reduce exposure?

On default, all trades in the netting set are terminated and valued, and gains and losses are offset into one net amount. Exposure falls from the sum of positive values to the floored net value.

What is the role of the CSA in an ISDA agreement?

The CSA sets the collateral rules for the trades. It defines margin calls, thresholds, minimum transfer amounts, eligible collateral and haircuts, so that exposure is covered by collateral as values move.

Can netting ever increase exposure?

No. Net exposure is never greater than gross exposure. The benefit can be zero if all trades have positive value to you, but it is never negative.