What is settlement (Herstatt) risk in FX, and how is it mitigated?
A core Risk & Compliance interview question — asked in analyst and associate interviews across IB, PE, and the Big 4.
THE SHORT ANSWER
Settlement risk — named after Bankhaus Herstatt, which failed in 1974 mid-settlement — is the risk in an FX trade that you pay away the currency you owe but don't receive the currency you're due, because settlement of the two legs isn't simultaneous and crosses time zones. You can deliver your euros in the morning, the counterparty fails before it delivers your dollars in its time zone, and you lose the full principal, not just a mark-to-market — it's a principal (not just replacement-cost) risk. It's mitigated chiefly by payment-versus-payment (PvP) settlement: CLS Bank settles both legs of eligible FX trades simultaneously across many currencies, so neither side pays unless both do, largely eliminating principal settlement risk for covered currencies. Other mitigants: bilateral netting (reducing the gross amounts settling), counterparty settlement limits, choosing PvP-eligible currencies, and shortening/aligning settlement windows. Settlement risk is distinct from pre-settlement (replacement) risk — the risk the counterparty defaults before settlement, leaving you to replace the contract at a worse rate. The headline: it's a full-principal, timing-driven risk, and CLS/PvP is the primary defense.
WHAT INTERVIEWERS LISTEN FOR
- ✓Risk of paying one leg but not receiving the other (timing/time-zone gap)
- ✓Full principal loss, not just replacement cost (Herstatt 1974)
- ✓Mitigated by PvP settlement via CLS (both legs settle simultaneously)
- ✓Also netting, settlement limits, PvP-eligible currencies; distinct from pre-settlement risk
COMMON MISTAKES
- ✗Treating it as only a mark-to-market/replacement risk
- ✗Not knowing CLS/PvP as the mitigant
- ✗Confusing settlement with pre-settlement risk
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