SS9/17 expects at least three scenarios for most firms (four for G-SIIs and O-SIIs, two under Simplified Obligations), severe enough to test the plan, with capital and liquidity over time under each one, without the recovery options and then with them. The second run gives the recovery capacity, in CET1, leverage ratio and LCR percentage points.
Model 900 does not run the stress itself. The stressed paths come from the RisKIT capital models and model 400, or your own stress tests, and it holds what is laid over them: each option’s value and the time it takes, and each trigger’s level. An option that takes months is worth nothing against a trigger that fires once the firm is inside its buffers, which is why SS9/17 wants calibration justified against the credible options, the time they take and the buffers.
Source: PRA SS9/17 Recovery planning, March 2026, paras 2.39, 2.51, 2.54, 2.57 and 2.66.