{
  "chain": "wholesale-settlement-collateral-mobility",
  "question": "A sharp mark-to-market move hits the book and the margin call balloons. Can the collateral we already hold still cover it?",
  "look_at": "513-margin-call-collateral-mobilizer.shortfall",
  "try_changing": {
    "step": "513-margin-call-collateral-mobilizer",
    "field": "portfolio_mtm",
    "value": -5000000
  }
}