Derivatives Foundation interview preparation

Questions

100

Traced to a firm

29

Firms

19

Updated

September 2026

Asked at

All firmsMSMorgan Stanley4Nomura4Akuna Capital2Amundi2HSBC2PIMCO2Bank of America1Barclays1Citadel1DRW1Goldman Sachs1Jane Street1Millennium Management1Mizuho1Old Mission Capital1RCRBC Capital Markets1Scotiabank1UBS1Wells Fargo Securities1

Topic

All topicsForwards and futures10Options basics8Option pricing7The Greeks10Volatility7Option strategies9Swaps and rates7Credit derivatives4Market structure and clearing6Indian derivatives8Trading and markets9Brainteasers6Fit9

Level

AnyCoreIntermediateHard

Type

AnyTechnicalCaseMarket viewBrainteaserFit

1. 064What does a central counterparty actually do, and does it eliminate risk?Market structure and clearingIntermediatetechnicalClearing and riskRisk management

   Say this

   A CCP interposes itself between the two sides of every trade, so each party faces the clearing house instead of each other. It does not eliminate risk — it mutualises and concentrates it. Bilateral credit risk becomes a single, heavily collateralised exposure to an institution that is now systemically critical.

   Then walk it

   1. Novation is the mechanism: one trade becomes two, buyer to CCP and CCP to seller. The CCP is flat in market terms and long credit risk to everyone.
   2. It manages that with a default waterfall: the defaulter's initial margin first, then their default fund contribution, then the CCP's own skin in the game, then the surviving members' mutualised default fund, and in the extreme, assessment rights or variation margin haircutting.
   3. Multilateral netting is the underrated benefit. Ten dealers with offsetting positions net down to a fraction of the gross notional, which cuts collateral and systemic exposure far more than any single risk transfer.
   4. But the risk did not vanish. It concentrated. A handful of CCPs now sit at the centre of the global derivatives market, they are all members of each other's ecosystems through the same dealers, and a CCP failure is close to unthinkable in the way that made pre-2008 assumptions dangerous.
   5. The procyclicality problem is the live one. Margin models raise requirements when volatility rises, so the CCP demands cash from everyone exactly when cash is scarce. March 2020 and the 2022 UK gilt and European energy episodes were all liquidity events driven substantially by margin calls.
   6. So my honest summary: clearing turned an opaque web of bilateral credit exposures into a transparent, collateralised, procyclical liquidity demand. That is a better trade-off than 2008, and it is a different risk, not the absence of one. The nickel squeeze on the LME in 2022 — where the exchange cancelled trades to protect itself and its members — showed the governance question is unresolved.

   Where candidates lose it

   Saying a CCP removes counterparty risk. It transforms credit risk into liquidity risk and concentrates it, and the procyclical margin point is the sophisticated answer. Naming a specific episode — March 2020, the gilt crisis, LME nickel — is what makes it credible.

   Expect next

   • Walk me through the default waterfall.
   • Why is CCP margin procyclical, and can that be fixed?
   • What went wrong at the LME in the 2022 nickel episode?
2. 065Distinguish initial margin from variation margin in the OTC world, and tell me why initial margin rules changed.Market structure and clearingIntermediatetechnicalClearing and riskRisk management

   Say this

   Variation margin covers the loss that has already happened — the daily mark-to-market. Initial margin covers the loss that might happen between a counterparty defaulting and you closing out the position, typically over a ten-day horizon at a 99 percent confidence level. Before 2016, uncleared OTC trades exchanged variation margin but almost no initial margin at all, and that gap is what the Uncleared Margin Rules closed.

   Then walk it

   1. The conceptual split: variation margin is a settlement of value that has moved and it is netted against your exposure. Initial margin is a buffer against future moves and it must be segregated, held by a third party, and not rehypothecated.
   2. That segregation requirement is the operationally expensive part. You cannot use the initial margin you received, so it is a genuine drag on balance sheet, unlike variation margin which offsets an exposure.
   3. Why it changed: in 2008 the uncollateralised and under-collateralised bilateral book was the transmission mechanism. AIG's positions had variation margin obligations that exploded and no meaningful initial margin buffer. The Basel and IOSCO framework from 2013, phased in from 2016 to 2022, required two-way initial margin on uncleared derivatives above declining notional thresholds.
   4. How it is calculated: either a regulatory schedule based on notional and asset class, which is crude and punitive, or ISDA SIMM, a standardised sensitivity-based model that everyone uses so that both sides compute the same number and disputes stay manageable.
   5. The threshold mechanic is worth knowing: a 50 million euro or dollar initial margin threshold per counterparty group means smaller relationships never actually post, which is why the final phases mostly captured buy-side firms rather than dealers.
   6. The honest consequence: the rules made uncleared derivatives materially more expensive, which was the intent — it pushed volume into clearing. The cost is that bespoke hedges are now expensive for exactly the end users who need them most, and some corporates responded by hedging less rather than differently. That is the unintended outcome regulators are still arguing about.

   Where candidates lose it

   Mixing the two up, or describing initial margin as 'a deposit'. The distinction is backward-looking versus forward-looking, and the key operational fact is that initial margin must be segregated while variation margin is not. Naming SIMM and the notional phase-in shows you know the actual regime.

   Expect next

   • Why must initial margin be segregated?
   • What is SIMM and why did the industry standardise on one model?
   • Did the rules push business into clearing, and at what cost to end users?
3. 066What is an ISDA Master Agreement and what does the CSA do?Market structure and clearingIntermediatetechnicalDerivatives operationsRisk management

   Say this

   The ISDA Master is the contract that governs all trades between two counterparties, so each new deal is a short confirmation under one legal framework rather than a fresh negotiation. Its most important function is close-out netting: on a default, all trades collapse into a single net amount. The Credit Support Annex is the collateral schedule bolted onto it — what you post, when, in what form, and with what thresholds.

   Then walk it

   1. Structure: the Master Agreement, a Schedule with the negotiated elections, definitions booklets by asset class, the CSA for collateral, and then individual trade confirmations. The confirmation for a swap can be a page because everything else is upstairs.
   2. Close-out netting is the commercial heart of it. Without it, a defaulting counterparty's administrator could cherry-pick — enforce the trades in their favour and disclaim the rest. Netting is why gross notional figures overstate real exposure by an order of magnitude, and why the enforceability opinion in each jurisdiction matters so much.
   3. Events of default and termination events are the other core: failure to pay, bankruptcy, cross-default, and negotiated ones like a ratings downgrade trigger or a NAV decline clause for a fund.
   4. The CSA sets the collateral mechanics: threshold, which is the unsecured amount you tolerate before any collateral moves; minimum transfer amount, to avoid moving trivial sums; eligible collateral and haircuts; and the valuation and dispute process.
   5. Those parameters are a real negotiation, not boilerplate. A high threshold means less operational friction and more credit exposure. Asymmetric thresholds, where the weaker credit posts and the dealer does not, were standard before the crisis and are much rarer now.
   6. India-specific note: the enforceability of close-out netting was genuinely uncertain here until the Bilateral Netting of Qualified Financial Contracts Act 2020, which is why bilateral derivative activity with Indian counterparties was constrained and priced accordingly. That legislation is one reason the onshore OTC market has been able to develop.

   Where candidates lose it

   Calling the ISDA Master 'the derivatives contract' without naming close-out netting. Netting is the reason the document exists and the reason gross notional is a misleading number. For an India-facing interview, knowing the 2020 netting legislation is a genuine differentiator.

   Expect next

   • Why is close-out netting so important to a dealer's capital?
   • What is the difference between a threshold and a minimum transfer amount?
   • How did the Indian netting legislation change the market here?
4. 068What does prime brokerage do, and how does it connect to the derivatives business?Market structure and clearingIntermediatetechnicalMSMorgan StanleyGlobal Markets · London · 2024

   Say this

   Prime brokerage is the outsourced back and middle office for a hedge fund, plus the financing. It provides custody, clearing, consolidated reporting, margin lending, stock borrow for shorting, and synthetic exposure through swaps. It connects to derivatives because the synthetic financing business — total return swaps and portfolio swaps — is where much of the balance sheet and much of the revenue now sits.

   Then walk it

   1. The core services: execution and clearing across brokers, custody of assets, one consolidated report of positions and profit and loss, cash management, and capital introduction to help the fund raise money.
   2. The revenue is mostly financing. Margin lending on the long book, the spread on stock borrow for the short book, and fees on the synthetic side. Rebate on short sale proceeds is a bigger line than most people expect.
   3. Synthetic prime is the derivatives link. Instead of the fund buying the stock and borrowing money, the prime broker holds the stock and writes a total return swap to the fund. The fund gets the economics, the broker keeps the position and charges a financing spread. It is more capital-efficient for the fund and often cheaper than cash prime.
   4. That structure also has consequences the industry learned about the hard way. Synthetic positions are not disclosed as ownership in most jurisdictions, and because each broker sees only its own slice, a client can build enormous concentrated leverage across several primes. That is exactly what Archegos did in 2021, and it cost Credit Suisse over 5 billion dollars.
   5. The risk management question for the broker is margin methodology on a concentrated, illiquid book — and whether you have the client's full picture. A dynamic margin model that accounts for concentration and liquidation horizon is the difference between a profitable business and Archegos.
   6. For the fund, counterparty risk cuts the other way, which is the Lehman lesson: assets that were rehypothecated in the UK entity were part of the insolvency estate, and funds lost access for years. Which is why serious funds now run multiple primes, negotiate rehypothecation limits, and monitor where their assets actually sit.

   Where candidates lose it

   Reciting a service list. A Global Markets interviewer wants to hear where the money is — financing, not execution — and how synthetic prime uses derivatives. Naming Archegos on the broker's side and Lehman on the fund's side turns a description into an understanding of the risk.

   Expect next

   • Where does a prime broker actually make its money?
   • What is synthetic prime and why do funds use it?
   • What went wrong in the Archegos episode?

   Reported by candidates at Morgan Stanley (Global Markets, London, 2024). Source: Wall Street Oasis.

Firm tags come from public, anonymous candidate reports on Wall Street Oasis: strong signal, not sworn testimony. Firms are named as the places a question was reported, not as partners of Fin Maverick. Answers are written for this page to show how to think out loud; they are not scripts to recite.