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  ],
  "coverage": {
    "source": "Korea public data portal — daily index series (archive/raw/indices)",
    "built_at": "2026. 9. 21. 오전 11:16:16",
    "rows": 4050,
    "days": 24,
    "first_date": "2026-08-18",
    "last_date": "2026-09-18",
    "distinct_indices": 151,
    "day_breakdown": [
      {
        "date": "2026-08-18",
        "indices": 168
      },
      {
        "date": "2026-08-19",
        "indices": 168
      },
      {
        "date": "2026-08-20",
        "indices": 168
      },
      {
        "date": "2026-08-21",
        "indices": 168
      },
      {
        "date": "2026-08-24",
        "indices": 168
      },
      {
        "date": "2026-08-25",
        "indices": 168
      },
      {
        "date": "2026-08-26",
        "indices": 168
      },
      {
        "date": "2026-08-27",
        "indices": 168
      },
      {
        "date": "2026-08-28",
        "indices": 168
      },
      {
        "date": "2026-08-31",
        "indices": 168
      },
      {
        "date": "2026-09-01",
        "indices": 168
      },
      {
        "date": "2026-09-02",
        "indices": 168
      },
      {
        "date": "2026-09-03",
        "indices": 168
      },
      {
        "date": "2026-09-04",
        "indices": 168
      },
      {
        "date": "2026-09-07",
        "indices": 168
      },
      {
        "date": "2026-09-08",
        "indices": 168
      },
      {
        "date": "2026-09-09",
        "indices": 168
      },
      {
        "date": "2026-09-10",
        "indices": 168
      },
      {
        "date": "2026-09-11",
        "indices": 171
      },
      {
        "date": "2026-09-14",
        "indices": 171
      },
      {
        "date": "2026-09-15",
        "indices": 171
      },
      {
        "date": "2026-09-16",
        "indices": 171
      },
      {
        "date": "2026-09-17",
        "indices": 171
      },
      {
        "date": "2026-09-18",
        "indices": 171
      }
    ],
    "dropped_unparsable_lines": 0,
    "not_index_tape": "This endpoint is the dated history. /v1/index-tape is a single most-recent snapshot with English names and base-date fields. They are built from the same well but answer different questions.",
    "year_low_note": "The source prints 0 for a year-low it has not measured. A zero is impossible for an index, so those rows carry year_low:null with year_low_not_measured:true — never a low of zero.",
    "not_this": "These are published index levels, reproduced as filed. Not a forecast and not advice."
  }
}