{
  "summary": {
    "date": "2026-01-27",
    "source_path": "/Users/lutherbot/.openclaw/workspace/data/cbbo_spread_cache/spread_cache_2026-01-27.parquet",
    "n_rows": 19797,
    "event_count": 2,
    "first_ts": 1769524203,
    "last_ts": 1769543999,
    "full_session_seconds": 19797
  },
  "events": [
    {
      "date": "2026-01-27",
      "cluster_id": 1,
      "ts": 1769526001,
      "cluster_size": 4,
      "max_p_ratio": 3.4999999999999996,
      "max_c_ratio": 4.749999999999999,
      "max_ratio": 4.749999999999999,
      "p_ratio_t0": 3.4999999999999996,
      "c_ratio_t0": 2.0,
      "p_spread_t0": 0.35,
      "c_spread_t0": 0.4,
      "p_base_t0": 0.1,
      "c_base_t0": 0.2
    },
    {
      "date": "2026-01-27",
      "cluster_id": 2,
      "ts": 1769536932,
      "cluster_size": 3,
      "max_p_ratio": 4.0,
      "max_c_ratio": 3.2499999999999996,
      "max_ratio": 4.0,
      "p_ratio_t0": 3.0000000000000004,
      "c_ratio_t0": 2.3749999999999996,
      "p_spread_t0": 0.30000000000000004,
      "c_spread_t0": 0.475,
      "p_base_t0": 0.1,
      "c_base_t0": 0.2
    }
  ]
}