{
  "generated_at": "2026-04-06T11:46:51+00:00",
  "provider": "akshare_eastmoney",
  "instruments": {
    "sse50": {
      "name": "上证50",
      "index_code": "000016",
      "provider_symbol": "sh000016",
      "price_type": "price_index",
      "configured_start": "2003-12-31",
      "requested_start": "2003-12-31",
      "actual_start": "2004-01-02",
      "last_operation": "bootstrap",
      "last_fetch_at": "2026-04-06T11:46:47+00:00",
      "layers": {
        "raw": {
          "path": "data/raw/sse50/price.parquet",
          "rows": 5403,
          "updated_at": "2026-04-06T11:46:47+00:00",
          "start_date": "2004-01-02",
          "end_date": "2026-04-03",
          "file_size_bytes": 274695
        },
        "clean": {
          "path": "data/clean/sse50/daily.parquet",
          "rows": 5403,
          "updated_at": "2026-04-06T11:46:47+00:00",
          "start_date": "2004-01-02",
          "end_date": "2026-04-03",
          "file_size_bytes": 396092
        },
        "features": {
          "path": "data/features/sse50/daily.parquet",
          "rows": 5403,
          "updated_at": "2026-04-06T11:46:47+00:00",
          "start_date": "2004-01-02",
          "end_date": "2026-04-03",
          "file_size_bytes": 777113
        }
      }
    },
    "hs300": {
      "name": "沪深300",
      "index_code": "000300",
      "provider_symbol": "sh000300",
      "price_type": "price_index",
      "configured_start": "2004-12-31",
      "requested_start": "2004-12-31",
      "actual_start": "2005-01-04",
      "last_operation": "bootstrap",
      "last_fetch_at": "2026-04-06T11:46:49+00:00",
      "layers": {
        "raw": {
          "path": "data/raw/hs300/price.parquet",
          "rows": 5160,
          "updated_at": "2026-04-06T11:46:48+00:00",
          "start_date": "2005-01-04",
          "end_date": "2026-04-03",
          "file_size_bytes": 271235
        },
        "clean": {
          "path": "data/clean/hs300/daily.parquet",
          "rows": 5160,
          "updated_at": "2026-04-06T11:46:48+00:00",
          "start_date": "2005-01-04",
          "end_date": "2026-04-03",
          "file_size_bytes": 389792
        },
        "features": {
          "path": "data/features/hs300/daily.parquet",
          "rows": 5160,
          "updated_at": "2026-04-06T11:46:49+00:00",
          "start_date": "2005-01-04",
          "end_date": "2026-04-03",
          "file_size_bytes": 744689
        }
      }
    },
    "chinext50": {
      "name": "创业板50",
      "index_code": "399673",
      "provider_symbol": "sz399673",
      "price_type": "price_index",
      "configured_start": "2010-05-31",
      "requested_start": "2010-05-31",
      "actual_start": "2014-06-18",
      "last_operation": "bootstrap",
      "last_fetch_at": "2026-04-06T11:46:50+00:00",
      "layers": {
        "raw": {
          "path": "data/raw/chinext50/price.parquet",
          "rows": 2868,
          "updated_at": "2026-04-06T11:46:50+00:00",
          "start_date": "2014-06-18",
          "end_date": "2026-04-03",
          "file_size_bytes": 147073
        },
        "clean": {
          "path": "data/clean/chinext50/daily.parquet",
          "rows": 2868,
          "updated_at": "2026-04-06T11:46:50+00:00",
          "start_date": "2014-06-18",
          "end_date": "2026-04-03",
          "file_size_bytes": 212865
        },
        "features": {
          "path": "data/features/chinext50/daily.parquet",
          "rows": 2868,
          "updated_at": "2026-04-06T11:46:50+00:00",
          "start_date": "2014-06-18",
          "end_date": "2026-04-03",
          "file_size_bytes": 412814
        }
      }
    },
    "star50": {
      "name": "科创50",
      "index_code": "000688",
      "provider_symbol": "sh000688",
      "price_type": "price_index",
      "configured_start": "2019-12-31",
      "requested_start": "2019-12-31",
      "actual_start": "2019-12-31",
      "last_operation": "bootstrap",
      "last_fetch_at": "2026-04-06T11:46:51+00:00",
      "layers": {
        "raw": {
          "path": "data/raw/star50/price.parquet",
          "rows": 1515,
          "updated_at": "2026-04-06T11:46:51+00:00",
          "start_date": "2019-12-31",
          "end_date": "2026-04-03",
          "file_size_bytes": 78055
        },
        "clean": {
          "path": "data/clean/star50/daily.parquet",
          "rows": 1515,
          "updated_at": "2026-04-06T11:46:51+00:00",
          "start_date": "2019-12-31",
          "end_date": "2026-04-03",
          "file_size_bytes": 113052
        },
        "features": {
          "path": "data/features/star50/daily.parquet",
          "rows": 1515,
          "updated_at": "2026-04-06T11:46:51+00:00",
          "start_date": "2019-12-31",
          "end_date": "2026-04-03",
          "file_size_bytes": 217544
        }
      }
    }
  },
  "common_sample": {
    "start_date": "2019-12-31",
    "end_date": "2026-04-03"
  }
}