The Collateral Call at 07:00
You are the treasury front-office manager at a European bank. At 06:15 on Monday a rating agency downgrades the bank to BBB+. Your largest corporate derivative counterparty has an ISDA/CSA with a €10 million threshold, a €5 million minimum transfer amount (MTA), and a rating trigger under which the threshold becomes zero if your rating falls below A-. The portfolio's mark-to-market exposure to the client is €42 million and you hold no collateral. Eligible collateral is EUR cash and German Bunds with a 2% haircut; the CSA requires daily margining with a 10:00 cut-off. Separately, an overnight settlement fail has left your EUR nostro €30 million short, and the bank's LCR is 118% against a 100% requirement. The client's collateral team says the rating trigger takes effect only from the next business day.
1. Calculate the collateral delivery amount and determine when it is due. How should the client's claim about timing be handled?
Read the worked answer
The delivery amount is exposure minus collateral held minus the applicable threshold, rounded to the MTA if it exceeds the MTA: €42m − €0 − €0 = €42m. That exceeds the €5m MTA, so a delivery is due; rounding to the nearest €5m gives €40m.
The threshold is zero because the rating trigger has been activated by the downgrade to BBB+. The client's argument that the trigger applies only from the next business day is not supported by the facts given: unless the CSA contains an explicit delay or a defined "rating event date", the trigger operates when the downgrade is announced, so the €40m is due by 10:00 today.
The prudent approach is to post or agree a delivery today and dispute any interpretive point afterwards. Withholding collateral while arguing exposes the bank to a potential event of default, close-out and reputational damage far exceeding any timing benefit. Legal should confirm the trigger wording in parallel, and the disagreement should be recorded in writing.
2. The bank must fund €40m while its nostro is €30m short. Evaluate the options and recommend an action that respects the LCR constraint.
Read the worked answer
The funding need is immediate and the nostro shortfall must be covered at the same time, so the two should be solved together rather than sequentially.
Option A – deliver German Bunds. €40m of collateral value requires €40m / 0.98 = €40.82m face. This meets the CSA if Bunds are eligible and preserves cash, but it consumes HQLA and leaves the nostro shortfall unfunded.
Option B – repo Bunds for cash. Repo around €41m face overnight or short-term to raise €40m, use part of the cash to cover the nostro shortfall and the rest for the collateral call. This solves both problems but encumbers HQLA; a term repo may reduce the LCR depending on its treatment, and the bank must check the net effect on the 118% ratio.
Option C – draw on the cash buffer. Simplest, but it reduces HQLA directly and adds to the LCR pressure.
Recommendation: deliver Bunds if the client accepts non-cash collateral, and repo a separate slice to cover the nostro shortfall; if the client insists on cash, repo enough Bunds for both needs. Check the LCR impact before executing and escalate to ALCO if the ratio would fall towards the 100% minimum. Do not leave the nostro short overnight to fund the collateral.
3. What governance and relationship actions should follow the dispute, and what should be reviewed across the CSA portfolio?
Read the worked answer
The bank should post first and argue second, with a written record of the client's position, the bank's interpretation and the legal advice. The relationship manager should be briefed so the client hears a consistent explanation, and the incident should go to the risk committee and ALCO because it combines a rating trigger, a funding shortfall and an LCR constraint.
Across the portfolio, treasury and legal should identify every CSA with a rating trigger, a zero-threshold step, a large MTA or a narrow eligible-collateral schedule, and model the collateral calls that would arise from a further one-notch downgrade. The stress should include the cash-versus-securities mix, because a trigger that forces cash delivery at scale is a liquidity event, not just a documentation issue. The bank should also review whether its collateral operations can meet an intraday 10:00 deadline when the nostro is short, and whether pre-positioning eligible collateral with custodians would shorten the response time. Finally, it should test the client's contractual interpretation and consider negotiating clearer rating-event wording at the next CSA amendment.