{
  "fund": "南方纳指100 (全链路估算)",
  "update_time": "2026-04-15T10:22:41.131Z",
  "date_debug": {
    "T": "2026-04-15",
    "T1": "2026-04-14"
  },
  "prices": {
    "2026-04-15": {
      "nav": 2.0603,
      "change": "+0.62%"
    },
    "2026-04-14": {
      "nav": 2.0476,
      "change": "+1.80%"
    },
    "2026-04-13": {
      "nav": 2.0113,
      "change": "+1.01%"
    },
    "2026-04-10": {
      "nav": 1.9912,
      "change": "+0.13%"
    },
    "2026-04-09": {
      "nav": 1.9886,
      "change": "+0.64%"
    },
    "2026-04-08": {
      "nav": 1.976,
      "change": "+2.49%"
    },
    "2026-04-07": {
      "nav": 1.928,
      "change": "--"
    }
  },
  "debug_info": {
    "future": {
      "method": "Futures Avg(100) / Index Prev Close",
      "future_avg": 26001.8075,
      "future_count": 100,
      "index_prev_close": 25842,
      "expression": "26001.81 / 25842.00"
    },
    "spot_T1_est": true,
    "spot": {
      "expression": "25842 (T-1) / 25383.72 (T-2)",
      "date_range": "2026-04-13 -> 2026-04-14"
    }
  }
}