{
  "series_id": "FEDFUNDS_12M_AVG",
  "source": "derived",
  "shortName": "Fed Funds Rate (12M Avg)",
  "updateFrequency": "monthly",
  "unit": "percent",
  "derivation": {
    "type": "rolling_ma",
    "source": "FEDFUNDS",
    "window": 12,
    "description": "12-month rolling moving average of the Federal Funds Effective Rate"
  }
}