Within the Insurance and Portfolio Management Industry there is a concept called Probability of Shortfall as well as Probability of Ruin. There were a number of papers (not on the internet) that I remember seeing on shortfall as part of my actuarial courses.
They evaluate how a certain product or strategy would impact a reduction in surplus or equity beneath some target level.
So if we take a similar approach here, you could start by identifying market shocks in isolation as well as in combination that would bring your regulatory capital below the minimum requirement. At work I run an ALM simulation for clients where I track what strategies lead to what probabilities of shortfall.
Not sure if this helps.