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FRM Exam Part I · Introduction to Derivatives

Central Clearing and Margin Requirements for FRM Part I

Updated 11 October 2026 · Fact-checked

Central clearing means a central counterparty (CCP) steps between buyer and seller of a derivative and guarantees performance. It controls risk with initial margin (a buffer against future losses) and variation margin (daily settlement of gains and losses). To solve questions, track the account daily and compare the balance with maintenance margin.

Understand Central Clearing and Margin Requirements

A derivative contract creates counterparty risk: if the other side defaults, you may lose the value you were owed. In a bilateral OTC trade, the two parties carry this risk to each other. They manage it with netting agreements and collateral, but exposures stay spread across a web of firms.

A central counterparty (CCP) changes the structure. Through novation, the original contract is replaced by two contracts: the CCP becomes the seller to the buyer and the buyer to the seller. Each member now faces the CCP, not each other. Exchange-traded futures have always worked this way, and many standardized OTC derivatives, such as interest rate swaps, are now cleared too.

The CCP protects itself with margin. Initial margin is posted when a position is opened. It covers potential losses over the time needed to close out a defaulting member's position, so it is sized from price volatility and a risk measure over a short horizon. Variation margin is paid or received each day as positions are marked to market. Losers pay and winners receive, so losses cannot build up.

In a futures margin account, you deposit initial margin. If the balance falls below the maintenance margin, you get a margin call and must top the account back up to the initial margin level, not just to maintenance. Withdrawals are allowed only for balances above initial margin. If you fail to pay, the position is closed out.

Central clearing reduces bilateral counterparty risk through multilateral netting, daily margining and loss-sharing. Typically defaults are met in order: the defaulter's margin first, then the defaulter's default fund contribution, then the CCP's own capital, then other members' default fund contributions. The cost is that risk is concentrated in the CCP, which becomes a systemically important point of failure, and that margin demands can strain liquidity in stressed markets.

Key formulas to remember

Daily futures gain or loss
Gain/Loss = (F_t − F_t−1) × contract size × number of contracts (long position)
Reverse the sign for a short position. This is the variation margin flow for the day.
Margin account balance
New balance = previous balance + daily gain − daily loss − withdrawals + deposits
Update this every day before testing against maintenance margin.
Margin call trigger
Margin call if balance < maintenance margin; deposit = initial margin − balance
The top-up restores the account to initial margin, not to maintenance margin.
Price move that triggers a call
Adverse move per contract = (balance − maintenance margin) ÷ contract size
A call occurs once the adverse move exceeds this amount (strictly, it takes the balance below maintenance).
Default waterfall order
Defaulter's initial margin → defaulter's default fund share → CCP capital → surviving members' default fund
This is the typical order. Exact details vary by CCP.

How to solve Central Clearing and Margin Requirements questions

Use this method for margin account calculations and for conceptual questions on clearing.

  1. 1Identify whether the question is numerical (margin account) or conceptual (CCP, bilateral, margin types).
  2. 2For numerical questions, note position direction (long or short), contract size, number of contracts, initial margin and maintenance margin.
  3. 3Compute each day's price change times size times contracts. Apply the sign: long gains when price rises, short gains when price falls.
  4. 4Update the balance day by day, adding gains, subtracting losses and any withdrawals.
  5. 5Compare the balance with maintenance margin each day. If below, compute the call as initial margin minus the balance.
  6. 6Add the deposit to the balance before moving to the next day.
  7. 7For conceptual questions, decide whether the item is initial margin (buffer, posted upfront) or variation margin (daily settlement) and whether the issue is bilateral or CCP risk.
  8. 8Check the answer: sign, units and whether the top-up goes to initial margin.

Quickest way: Margin trigger shortcut

When to use it: Use when the question asks when the first margin call occurs or how large it is.

  1. Compute the cushion: initial margin minus maintenance margin, per contract.
  2. Divide the cushion by contract size to get the adverse price move that triggers a call.
  3. Compare cumulative adverse moves to that number. The call happens once the move exceeds it.
  4. Size the call as initial margin minus the current balance, which equals the full cumulative loss since the last top-up.

Common mistakes in Central Clearing and Margin Requirements

  • Topping up only to maintenance margin after a margin call.

    Students link the call to the maintenance level that triggered it.

    Fix: Futures margin calls restore the account to initial margin. Deposit = initial margin − balance.

  • Confusing initial and variation margin.

    Both are collateral and both are called margin.

    Fix: Initial margin is a upfront buffer for potential future loss. Variation margin is the daily transfer of realized mark-to-market gains and losses.

  • Getting the sign wrong for short positions.

    Students apply the long formula by default.

    Fix: A short gains when futures prices fall. Write the direction next to each daily change.

  • Saying a CCP eliminates counterparty risk.

    Novation sounds like a full guarantee.

    Fix: A CCP reduces and concentrates risk. Members still face CCP default risk, and loss-sharing can hit survivors.

  • Forgetting that novation replaces the original contract.

    Students picture the CCP as an extra party.

    Fix: The CCP becomes the counterparty to each side, so the two original parties no longer face each other.

  • Ignoring multilateral netting benefits.

    Students compare gross positions only.

    Fix: Clearing nets exposures across all members, so total collateral and exposure can fall compared with many bilateral trades.

Worked examples

Example 1

A trader goes long 10 futures contracts on an index with a multiplier of $50 per index point. Initial margin is $4,000 per contract and maintenance margin is $3,000 per contract. The futures price falls by 25 points on day 1. Is there a margin call, and for how much?

Show the solution
  1. Initial balance = 10 × $4,000 = $40,000. Maintenance requirement = 10 × $3,000 = $30,000.
  2. Day 1 loss = 25 × $50 × 10 = $12,500.
  3. New balance = $40,000 − $12,500 = $27,500.
  4. $27,500 is below $30,000, so a margin call is issued.
  5. Deposit = initial margin − balance = $40,000 − $27,500 = $12,500.

Answer: Yes. The margin call is $12,500, which restores the account to $40,000.

Example 2

A trader shorts 5 futures contracts on crude oil, each for 1,000 barrels. Initial margin is $6,000 per contract and maintenance margin is $4,500 per contract. The futures price rises by $1.20 per barrel on day 1 and then by $0.50 on day 2. Assume no top-ups are made. What is the balance after day 2 and is a call triggered by then?

Show the solution
  1. Initial balance = 5 × $6,000 = $30,000. Maintenance = 5 × $4,500 = $22,500.
  2. Loss per $1 move = 1,000 × 5 = $5,000.
  3. Day 1 loss = 1.20 × $5,000 = $6,000. Balance = $24,000, which is above $22,500, so no call.
  4. Day 2 loss = 0.50 × $5,000 = $2,500. Balance = $21,500.
  5. $21,500 is below $22,500, so a call is triggered on day 2.
  6. Deposit required = $30,000 − $21,500 = $8,500.

Answer: The balance after day 2 is $21,500, a margin call is triggered, and the deposit is $8,500.

Exam tips

  • Always write the direction (long or short) before any arithmetic. Sign errors are the most common loss of marks.
  • Remember that the call restores the account to initial margin. Distractors often use the maintenance level.
  • For conceptual items, match words to margin type: buffer or default coverage means initial margin, daily settlement means variation margin.
  • Expect trade-off questions: CCPs cut bilateral exposure through netting but concentrate risk and raise liquidity demands.
  • A financial calculator is not needed. Do the daily balance as a short running list to avoid slips.

Practice questions from Introduction to Derivatives

Central Clearing and Margin Requirements in other exams

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

Central Clearing and Margin Requirements: frequently asked questions

What is the difference between initial margin and variation margin?

Initial margin is collateral posted when a position is opened. It covers potential future losses if a member defaults. Variation margin is the daily payment of gains and losses from marking positions to market.

How does a margin account work in futures?

You deposit initial margin and the account is adjusted daily for gains and losses. If the balance drops below maintenance margin, you receive a margin call and must restore the balance to initial margin.

How does a CCP reduce counterparty risk compared with bilateral OTC trading?

The CCP becomes counterparty to both sides through novation, nets exposures across members and collects margin and default fund contributions. Members then face a well-collateralized CCP instead of many individual firms.

Does central clearing remove all risk?

No. It shifts and concentrates risk in the CCP. If losses exceed a defaulter's margin and default fund share, they can fall on the CCP and surviving members.