The account relationship behind the payment
Correspondent banking lets one bank provide payment and related services to another, often across borders. A nostro account is the respondent bank’s account at another bank; from the account-holding bank’s perspective, the same relationship is a vostro. The labels describe perspective, not two different pools of money. [1, 2]
The CPMI’s July 13, 2016 final report remains useful for the mechanism and information problems. Its historical statistics should not be presented as current network coverage. Current transaction volumes or provider performance require separate dated evidence.
Messaging is not settlement
An instruction can arrive before usable funds, and a confirmation can refer to one leg rather than final availability to the customer. Map the sender, correspondents, foreign-exchange provider and beneficiary bank. Identify which institution holds the money at each stage and whose obligation is being discharged.
Analysis: the key operational measures are completion time, exception rate, deductions and usable funds at destination. A faster message format can improve visibility without eliminating funding constraints, screening holds, local cutoffs or incorrect beneficiary details. Technology claims should specify which part of this chain improved.
Why banks prefund
Prefunding supports payments before incoming receipts arrive but ties up and creates exposure to the account-holding bank. A balance that appears excessive on an average day may be needed for peak outgoing flows or a holiday mismatch. Conversely, a large standing buffer can conceal weak forecasting and poor intraday visibility.
Risk-based due diligence for foreign financial-institution correspondent accounts is a separate legal layer. FinCEN materials describe obligations under 31 CFR 1010.610, including enhanced requirements in specified circumstances. A liquidity-efficient route is not automatically an acceptable compliance route. [3]
Worked funding example
Hypothetical: a bank keeps $10 million across several correspondent accounts to support expected flows. At an assumed 4% annual opportunity cost, the gross carrying cost is $400,000 a year before any interest earned on those balances. Reducing average idle balances by $3 million would save $120,000 under the same assumption.
But suppose the reduction causes the bank to miss a settlement cutoff twice a month and incur emergency funding and customer-remediation expense. Compare the full cost and stress performance, not only average balances. A reserve at one correspondent may not be transferable in time to cure a shortfall at another.
A route-level operating dashboard
Suggested analysis:
Scroll horizontally to see all columns.
| Measure | Why it matters | Interpretation limit |
|---|---|---|
| Peak funding need | Captures intraday timing | Daily net flows can hide large peaks |
| Idle balance by currency | Identifies opportunity cost | Some balances are required contingency buffers |
| Exception aging | Shows stranded payments and customer impact | Separate compliance review from technical repair |
| Route concentration | Tests substitutability | Two brands may use the same upstream bank |
| All-in delivered amount | Captures fees and FX effects | Compare matching amounts, corridors and times |
Trade-offs and evidence that changes the view
A concentrated network can simplify reconciliation and pricing, while a diversified network can improve continuity at the expense of operational complexity and fragmented . Evaluate alternatives using realistic volume, settlement windows and the ability to switch during an outage. A dormant backup arrangement is not proven capacity.
Recommended next step is a pilot on one clearly defined corridor, with the incumbent route as a measured baseline. Record dispatch, each settlement event and customer availability. Include rejected instructions and returns in performance results. Lower cost with unchanged or better stress resilience supports expansion; unexplained deductions, opaque intermediaries or failure to recover trapped funds argue for redesign.
Sources
- 1. CPMI, Correspondent banking final report; July 13, 2016Source · PDFBack to text: ↑
- 2. BIS, On the global retreat of correspondent banks; 2020 researchSourceBack to text: ↑
- 3. FinCEN, correspondent-account due diligence discussion; FIN-2017-A002Official sourceBack to text: ↑