{
  "provenance": "Original deterministic teaching constraints; no vendor data inputs; no random perturbation of any market series.",
  "case": {
    "instrument": "CEDAR (fictional)",
    "contract": "CEDAR E call 50 (fictional identifier)",
    "multiplier": 100,
    "quantity": 1,
    "fee_per_contract_per_side": "0.65",
    "quotes": [
      {
        "snapshot": "A",
        "remaining_sessions": 10,
        "stock": "48.00",
        "strike": "50.00",
        "bid": "0.90",
        "ask": "1.10"
      },
      {
        "snapshot": "B",
        "remaining_sessions": 8,
        "stock": "51.00",
        "strike": "50.00",
        "bid": "1.65",
        "ask": "1.85"
      }
    ],
    "cash": "500.00",
    "alternative_quote": {
      "snapshot": "B alternative",
      "remaining_sessions": 8,
      "stock": "48.00",
      "strike": "50.00",
      "bid": "0.40",
      "ask": "0.60"
    },
    "assumptions": "Synchronized invented quotes; stated fills for one contract; no exercise; sell to close at B; no dividends/corporate actions; no other charges or taxes."
  }
}