{
  "provenance": "Original deterministic teaching constraints; no vendor data inputs; no random perturbation of any market series.",
  "case": {
    "instrument": "FINCH (fictional)",
    "multiplier": 100,
    "strike": "30.00",
    "entry_bid": "0.30",
    "entry_ask": "0.35",
    "fee_per_contract": "0.65",
    "budget": "300.00",
    "attempts": [
      {
        "expiry": "E1",
        "stock_at_entry": "29.20",
        "stock_at_expiry": "29.50",
        "quantity_requested": 1,
        "accepted": true
      },
      {
        "expiry": "E2",
        "stock_at_entry": "29.10",
        "stock_at_expiry": "29.70",
        "quantity_requested": 3,
        "accepted": true
      },
      {
        "expiry": "E3",
        "stock_at_entry": "29.40",
        "stock_at_expiry": "29.20",
        "quantity_requested": 6,
        "accepted": false
      }
    ],
    "assumptions": "Separate fictional expiry sessions; buy calls earlier on their expiry day, not newly listed daily equity contracts. Assumed fills at ask for accepted trades, then worthless expiry with no exercise; no closing charge, other fees or taxes. Third attempt rejected before entry."
  }
}