{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "$anchor": "cdm.observable.asset",
  "type": "string",
  "title": "OptionReferenceTypeEnum",
  "description": "The enumeration values to specify the reference source that determines the final settlement price of the option.",
  "enum": [
    "Future",
    "Spot"
  ],
  "oneOf": [
    {
      "enum": [
        "Future"
      ],
      "title": "Future",
      "description": "Reference from the price of a future contract."
    },
    
    {
      "enum": [
        "Spot"
      ],
      "title": "Spot",
      "description": "Reference from an underlyer spot price."
    }
  ]
}