Nostro, Vostro and Net Settlement Mechanics
A precise walk through of the account relationships, mirror ledgers and netting cycles that sit behind a single international payment.
Banking Infrastructure Architect
Naming the accounts correctly
A nostro is our account held with them. A vostro is their account held with us. Every reconciliation dispute in correspondent banking begins with someone reversing those two.
The mirror ledger
Internally, each nostro is shadowed by a mirror account. The mirror is updated on instruction; the nostro is updated on statement. The difference between them, aged by value date, is your true exposure.
Netting cycles
- Bilateral netting reduces gross flows between two counterparties to a single position per cycle.
- Multilateral netting through a scheme or agent compresses further but concentrates settlement risk at the agent.
Unreconciled mirror breaks older than five business days are the single best leading indicator of an operational failure.
Content is provided for general informational purposes only and does not constitute legal, regulatory, tax, investment or financial advice.
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