{
  "last_updated": "2026-02-22T10:38:35.159039",
  "source": "Yahoo Finance (free)",
  "range": "5 years",
  "interval": "daily",
  "files": {
    "vix": "vix_daily.csv",
    "vix9d": "vix9d_daily.csv",
    "vix1d": "vix1d_daily.csv",
    "vvix": "vvix_daily.csv",
    "es_continuous": "es_continuous_daily.csv",
    "nq_continuous": "nq_continuous_daily.csv",
    "ym_continuous": "ym_continuous_daily.csv",
    "rty_continuous": "rty_continuous_daily.csv",
    "zn_10yr": "zn_10yr_daily.csv",
    "zb_30yr": "zb_30yr_daily.csv",
    "tnx_10yr_yield": "tnx_10yr_yield_daily.csv",
    "dxy": "dxy_daily.csv",
    "cl_crude": "cl_crude_daily.csv",
    "gc_gold": "gc_gold_daily.csv",
    "spy": "spy_daily.csv",
    "spx": "spx_daily.csv"
  }
}