{
  "series_id": "NASDAQCOM_12M_AVG_ANNUAL",
  "source": "derived",
  "shortName": "NASDAQ (12M Avg, Annual)",
  "name": "NASDAQ Composite Index (12M Avg, Annual)",
  "updateFrequency": "annual",
  "unit": "index",
  "derivation": {
    "type": "annual_month_slice",
    "source": "NASDAQCOM_12M_AVG",
    "target_month": 12,
    "select": "last",
    "map_to_month": 1,
    "map_to_day": 1,
    "description": "12-month trailing average NASDAQ Composite taken at last trading day of December each year"
  }
}