On this page
A consolidated liquidity stress test can show a surplus while the parent bank faces a shortfall. That happens when liquid assets sit in a subsidiary but cannot be transferred to the parent during the scenario. A sound test therefore examines cash needs and usable liquidity at each material entity as well as for the group.
Design the test around usable liquidity
Start with a scenario, a time horizon and a clear map of the group. Estimate stressed cash outflows and the liquid resources each legal entity can actually use within that horizon. Then test whether transfers between entities remain possible under the same shock. A group total cannot answer where cash is needed unless the transfer assumption is credible.
The Basel Committee’s liquidity risk guidance calls for group-wide and individual-entity analysis, including legal, regulatory and operational limits on transfers. It also calls for institution-specific and market-wide scenarios, separately and together. Those choices test where a bank might run out of accessible cash.
An illustrative parent and subsidiary
These invented figures are in millions of currency units. Assume one stressed horizon, no inflows other than the stated liquid assets, and a restriction that prevents the subsidiary sending funds to its parent during that horizon.
| Parent | 100 | 120 | -20 |
| Subsidiary | 50 | 20 | +30 |
| Consolidated total | 150 | 140 | +10 |
At group level, liquid assets of 150 cover outflows of 140, leaving 10. At entity level, the parent has 100 against 120 and is short 20, while the subsidiary has 30 left over. The subsidiary’s excess cannot cure the parent’s gap under the stated restriction. The conclusion is therefore a parent liquidity problem despite the positive consolidated total.
Change the transfer assumption only if the scenario permits a transfer within the horizon and the bank can show the legal and operational route. The Basel Committee explicitly asks banks to make such assumptions transparent. If a transfer is feasible only after the outflow arrives, it does not solve this horizon’s shortage.
What the exam is testing
The calculation is simple; the design judgement is harder. Identify the stressed entity, when cash is required, and the source of the cash claimed to meet it. Then ask whether the scenario weakens that source or blocks its movement. A combined funding and market shock may alter both outflows and the amount obtainable from asset sales.
A second common error is treating the result as the end of the process. The Basel Committee’s stress-testing guidance expects defined responsibility for scenarios, model validation, challenge of results and use of outputs. A shortfall should lead to a documented management response and a review of its assumptions.
For context on the wider syllabus, see the FRM programme page. The related model assumption discussion explains why a plausible output still needs an assumption check.
Sources
- Liquidity risk management and supervision | Bank for International Settlements · bis.org · Retrieved
- Stress testing | Bank for International Settlements · bis.org · Retrieved
