{
  "summary": {
    "date": "2026-01-28",
    "source_path": "/Users/lutherbot/.openclaw/workspace/data/cbbo_spread_cache/spread_cache_2026-01-28.parquet",
    "n_rows": 19797,
    "event_count": 4,
    "first_ts": 1769610603,
    "last_ts": 1769630399,
    "full_session_seconds": 19797
  },
  "events": [
    {
      "date": "2026-01-28",
      "cluster_id": 1,
      "ts": 1769622028,
      "cluster_size": 1,
      "max_p_ratio": 10.461538461538462,
      "max_c_ratio": 4.5,
      "max_ratio": 10.461538461538462,
      "p_ratio_t0": 10.461538461538462,
      "c_ratio_t0": 4.5,
      "p_spread_t0": 3.4000000000000004,
      "c_spread_t0": 0.45,
      "p_base_t0": 0.325,
      "c_base_t0": 0.1
    },
    {
      "date": "2026-01-28",
      "cluster_id": 2,
      "ts": 1769626774,
      "cluster_size": 18,
      "max_p_ratio": 14.6,
      "max_c_ratio": 14.33333333333333,
      "max_ratio": 14.6,
      "p_ratio_t0": 2.625,
      "c_ratio_t0": 2.0,
      "p_spread_t0": 1.05,
      "c_spread_t0": 0.2,
      "p_base_t0": 0.4,
      "c_base_t0": 0.1
    },
    {
      "date": "2026-01-28",
      "cluster_id": 3,
      "ts": 1769628680,
      "cluster_size": 1,
      "max_p_ratio": 4.000000000000001,
      "max_c_ratio": 2.0,
      "max_ratio": 4.000000000000001,
      "p_ratio_t0": 4.000000000000001,
      "c_ratio_t0": 2.0,
      "p_spread_t0": 2.6,
      "c_spread_t0": 0.2,
      "p_base_t0": 0.6499999999999999,
      "c_base_t0": 0.1
    },
    {
      "date": "2026-01-28",
      "cluster_id": 4,
      "ts": 1769630076,
      "cluster_size": 1,
      "max_p_ratio": 3.555555555555556,
      "max_c_ratio": 2.333333333333333,
      "max_ratio": 3.555555555555556,
      "p_ratio_t0": 3.555555555555556,
      "c_ratio_t0": 2.333333333333333,
      "p_spread_t0": 1.6,
      "c_spread_t0": 0.175,
      "p_base_t0": 0.45,
      "c_base_t0": 0.07500000000000001
    }
  ]
}