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FRM Exam Part II · Derivatives

Netting, Collateral and Credit Mitigants for FRM Part 2

Updated 11 October 2026 · Fact-checked

Netting, collateral and credit mitigants cut derivative counterparty exposure. Close-out netting under an ISDA master agreement combines all trades into one net claim at default. Collateral under a CSA covers that net claim, less any threshold, MTA and gap risk. To solve questions, net first, then deduct collateral, then allow for the margin period of risk.

Understand Netting, Collateral and Credit Mitigants

Counterparty exposure on a derivative is what you would lose if the counterparty defaulted today. Only positive-value trades create exposure. If you owe the counterparty on a trade, you cannot ignore it, but without a legal right to offset, you would still owe it in full while only receiving a fraction of what they owe you.

Close-out netting fixes this. Under an ISDA master agreement, on default all trades in the netting set are terminated and valued. The positive and negative values are added into one single net amount. Only that net amount is paid or claimed. Netting is only reliable if it is legally enforceable in the relevant jurisdictions. This is why banks obtain legal opinions. Without enforceability, a liquidator could cherry-pick, keeping profitable trades and rejecting losing ones.

Collateral reduces the net exposure further. Under a Credit Support Annex (CSA), the parties exchange variation margin to reflect current mark-to-market changes. Initial margin is an extra buffer posted at the start, covering the move in value between the last margin call and close-out. Key CSA terms: the threshold is the exposure you accept unsecured before collateral is due. The minimum transfer amount (MTA) is the smallest call that will actually be made. Both leave some residual exposure.

The margin period of risk (MPOR) is the time from the last successful margin exchange to when the defaulter's position is closed out and hedged. It includes the margin call delay, the dispute and grace period, and the time to replace or liquidate trades. The longer it is, the more the portfolio can move before collateral catches up. Collateral does not remove risk. It swaps credit risk for residual market, liquidity and legal risks, and for wrong-way risk when the collateral is correlated with the counterparty.

Key formulas to remember

Net exposure with close-out netting
Netted exposure = max(Σ Vi, 0)
Vi are trade values in one netting set. The formula holds only if close-out netting is legally enforceable. If it is not, exposure is Σ max(Vi, 0). Close-out costs can also make the actual claim differ from this figure.
Netting benefit
Netting benefit = Σ max(Vi, 0) − max(Σ Vi, 0)
It is never negative, so netting never raises exposure. It is zero when all trades have the same sign, whether all positive or all negative. This assumes netting is enforceable.
Collateralised exposure (simple)
Exposure = max(V − C, 0)
V is net mark-to-market, C is collateral held. Haircuts reduce C for non-cash collateral.
Collateral call with threshold and MTA
Required collateral = max(V − Threshold, 0); a call is made only if the change in required collateral ≥ MTA
Residual exposure can be up to threshold + MTA before any market move during MPOR.
Exposure at default with MPOR
Exposure ≈ max(V(t + MPOR) − C, 0)
The relevant risk is the change in value over MPOR, not over one day.
Square-root-of-time scaling
σ(MPOR) ≈ σ(1 day) × √(MPOR in days)
Used as an approximation, assuming independent, identically distributed daily moves.

How to solve Netting, Collateral and Credit Mitigants questions

Use this order for any numerical or conceptual question on netting and collateral.

  1. 1Identify the netting set: which trades sit under one enforceable master agreement. Trades under different agreements cannot be netted together.
  2. 2Compute the gross exposure as the sum of positive values, and the net exposure as the sum of all values floored at zero.
  3. 3Check the collateral terms: threshold, MTA, independent amount or initial margin, haircuts, and whether collateral is cash or securities.
  4. 4Subtract the collateral held, after haircuts, from net exposure, and floor the result at zero.
  5. 5Add the margin period of risk: estimate how much the portfolio could move over MPOR, using a stated volatility and scaling by √time if given.
  6. 6Interpret: state what risk remains (threshold, MTA, MPOR gap, haircut, legal enforceability, wrong-way risk).
  7. 7Match your answer to the option that uses the right direction: more netting, lower MPOR, lower threshold all reduce exposure.

Quickest way: Net, collateralise, then add the gap

When to use it: Use for numerical MCQs with a list of trade values and CSA terms.

  1. Add all trade values, positive and negative, to get the net value.
  2. If the net is negative, exposure is zero.
  3. Cap uncollateralised exposure at the threshold, or see if the MTA blocks a call.
  4. For MPOR questions, scale one-day volatility by √days, then apply the confidence multiplier.
  5. Eliminate options that add positive values only, ignore the threshold or use the wrong MPOR.

Common mistakes in Netting, Collateral and Credit Mitigants

  • Netting trades across different master agreements or counterparties.

    Students focus on the numbers and skip the legal grouping.

    Fix: Net only within one enforceable netting set. Treat each set separately, then add the results.

  • Treating the threshold as collateral that is posted.

    The word sounds like a posting level.

    Fix: The threshold is unsecured exposure. Collateral is due only on the amount above it.

  • Thinking collateral eliminates counterparty risk.

    Collateralised trades are called secured.

    Fix: Residual risk remains from MPOR, MTA, threshold, haircuts, collateral liquidity and wrong-way risk.

  • Confusing initial margin and variation margin.

    Both are called margin and both are posted.

    Fix: Variation margin tracks current mark-to-market and moves back and forth. Initial margin covers potential future move during close-out and is typically held separately.

  • Using a one-day horizon for collateralised exposure.

    VaR is usually a one-day measure.

    Fix: Use MPOR. Daily margining does not mean a one-day risk horizon, because default and close-out take time.

  • Assuming netting always lowers exposure.

    Netting is taught as a benefit.

    Fix: Netting never raises exposure, but it gives no benefit when all trades have the same sign. The netted formula also holds only if netting is enforceable. If it is not, use the sum of positive values.

Worked examples

Example 1

A bank has three trades with one counterparty under an enforceable ISDA master agreement. Mark-to-market values to the bank are +USD 12 million, −USD 5 million and +USD 3 million. The bank holds no collateral. Find exposure with and without netting, and the netting benefit.

Show the solution
  1. Gross exposure without netting: sum of positive values = 12 + 3 = USD 15 million.
  2. Net value = 12 − 5 + 3 = USD 10 million.
  3. Netted exposure = max(10, 0) = USD 10 million.
  4. Netting benefit = 15 − 10 = USD 5 million.

Answer: Exposure is USD 15 million without netting and USD 10 million with netting. The netting benefit is USD 5 million.

Example 2

A netting set has a net mark-to-market value of +USD 8 million to Bank A at the latest valuation. The CSA has a threshold of USD 2 million and an MTA of USD 0.5 million. Bank A holds USD 5.7 million in cash collateral from earlier calls, and no further call has been delivered since the latest valuation. Counterparty B defaults, and over the margin period of risk the net value rises by USD 1 million. Estimate Bank A's exposure at default.

Show the solution
  1. The latest margin call calculation is based on V = 8. Required collateral = max(8 − 2, 0) = USD 6 million.
  2. Bank A holds only USD 5.7 million. The gap is 6 − 5.7 = USD 0.3 million, which is below the MTA of USD 0.5 million, so no call is made. Collateral held stays at USD 5.7 million.
  3. Value at close-out = 8 + 1 = USD 9 million. The MPOR move happens after the last exchange, with no further collateral delivered.
  4. Exposure = max(9 − 5.7, 0) = USD 3.3 million.

Answer: Exposure at default is USD 3.3 million, made up of the threshold (USD 2 million), the uncalled gap below the MTA (USD 0.3 million) and the MPOR move (USD 1 million).

Exam tips

  • Read the question for the netting set first. A different agreement means no netting.
  • When both threshold and MTA appear, apply the threshold to size collateral, then check whether the MTA blocks the call.
  • Expect conceptual options on MPOR: a longer MPOR means higher exposure, and disputes lengthen it.
  • Know that initial margin protects the receiver against the move during close-out and is usually segregated.
  • Look for wrong-way risk in collateral questions: collateral issued by the counterparty or its sector gives weaker protection.

Practice questions from Derivatives

Netting, Collateral and Credit Mitigants in other exams

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

Netting, Collateral and Credit Mitigants: frequently asked questions

How does close-out netting reduce exposure?

On default, all trades are terminated and valued, and gains and losses are offset into one net claim. You then claim only the net amount if positive. This is always no greater than the sum of positive values.

What is the difference between initial margin and variation margin?

Variation margin settles the current mark-to-market change and flows both ways as values move. Initial margin is an extra buffer posted up front to cover the potential loss during the close-out period. It is not returned until the trades end.

What is the margin period of risk?

It is the time between the last collateral exchange before default and the point when the position is closed out and hedged. Exposure is measured over this period. Longer periods in illiquid or disputed portfolios increase exposure.

What do threshold and minimum transfer amount mean in a CSA?

The threshold is the unsecured exposure allowed before collateral must be posted. The MTA is the smallest amount that triggers a transfer. Both leave some residual uncollateralised exposure.