{
  "story_id": "e680ae70e18b66d174af4b8a502360ab",
  "desk": "drm3",
  "revision": 1,
  "published_at": "2026-09-02T11:15:00.000Z",
  "content_hash": "fe0b4dfcc05d3d0aea90ed3cc75813a3463fcc01dfdd31799ce70cac5a8b8f88",
  "hash_basis": "sha256 over `headline\\ndek\\nprose`, plus `\\n` + the canonical citations JSON when any source is placed, plus `\\n#blog` for blogs",
  "basis": {
    "headline": "Finnish Electricity Prices Spike to 12.3 Cents on Wednesday",
    "dek": "Nord Pool electricity prices for Finnish consumers peak at 12.3 cents per kWh on Wednesday.",
    "prose": "The average hourly electricity price for Finnish consumers will rise to a peak of 12.3 cents per kilowatt-hour on Wednesday, including a 25.5% value-added tax. [^1]\n\nIn a five-dataset electricity-price setting, the CastClaw authors report the lowest point-estimate MSE and MAE among 16 baseline models. [^2]\n\nIn the arXiv preprint 2608.30976 submitted on 31 August 2026, the authors present CastClaw, a human-in-the-loop autonomous forecasting system built through forecasting-oriented harness engineering. [^3]\n\nThe highest hourly price of the day is expected at 10:00 on Wednesday, while the lowest price is 4.4 cents per kilowatt-hour at 3:00. [^4]\n\nThe Nord Pool electricity exchange transitioned to a 15-minute pricing model starting from the beginning of October 2025. [^5]\n\nAccording to the CastClaw authors, starting from a supplied or model-generated forecast, the system checks temporal patterns and user constraints, and when evidence is missing it retrieves context, runs an analysis or another model, or asks the user. [^6]\n\nThe CastClaw paper states that it was validated offline on provincial electricity-load data from North China covering January to June 2026, and that a Nord Pool case demonstrates the inspectable workflow. [^7]",
    "cited": "[{\"statement\":\"The average hourly electricity price for Finnish consumers will rise to a peak of 12.3 cents per kilowatt-hour on Wednesday, including a 25.5% value-added tax.\",\"source\":\"Kauppalehti\",\"instrument\":\"News\",\"claim_key\":null,\"published_at\":\"2026-09-01T11:15:00.000Z\",\"publisher_count\":1,\"sources\":[\"Kauppalehti\"]},{\"statement\":\"In a five-dataset electricity-price setting, the CastClaw authors report the lowest point-estimate MSE and MAE among 16 baseline models.\",\"source\":\"arXiv.org\",\"instrument\":\"News\",\"claim_key\":null,\"published_at\":\"2026-09-01T04:00:00.000Z\",\"publisher_count\":1,\"sources\":[\"arXiv.org\"]},{\"statement\":\"In the arXiv preprint 2608.30976 submitted on 31 August 2026, the authors present CastClaw, a human-in-the-loop autonomous forecasting system built through forecasting-oriented harness engineering.\",\"source\":\"arXiv.org\",\"instrument\":\"News\",\"claim_key\":null,\"published_at\":\"2026-09-01T04:00:00.000Z\",\"publisher_count\":1,\"sources\":[\"arXiv.org\"]},{\"statement\":\"The highest hourly price of the day is expected at 10:00 on Wednesday, while the lowest price is 4.4 cents per kilowatt-hour at 3:00.\",\"source\":\"Kauppalehti\",\"instrument\":\"News\",\"claim_key\":null,\"published_at\":\"2026-09-01T11:15:00.000Z\",\"publisher_count\":1,\"sources\":[\"Kauppalehti\"]},{\"statement\":\"The Nord Pool electricity exchange transitioned to a 15-minute pricing model starting from the beginning of October 2025.\",\"source\":\"Kauppalehti\",\"instrument\":\"News\",\"claim_key\":null,\"published_at\":\"2026-09-01T11:15:00.000Z\",\"publisher_count\":1,\"sources\":[\"Kauppalehti\"]},{\"statement\":\"According to the CastClaw authors, starting from a supplied or model-generated forecast, the system checks temporal patterns and user constraints, and when evidence is missing it retrieves context, runs an analysis or another model, or asks the user.\",\"source\":\"arXiv.org\",\"instrument\":\"News\",\"claim_key\":null,\"published_at\":\"2026-09-01T04:00:00.000Z\",\"publisher_count\":1,\"sources\":[\"arXiv.org\"]},{\"statement\":\"The CastClaw paper states that it was validated offline on provincial electricity-load data from North China covering January to June 2026, and that a Nord Pool case demonstrates the inspectable workflow.\",\"source\":\"arXiv.org\",\"instrument\":\"News\",\"claim_key\":null,\"published_at\":\"2026-09-01T04:00:00.000Z\",\"publisher_count\":1,\"sources\":[\"arXiv.org\"]}]",
    "kind": "news"
  },
  "receipt_verify": "Ed25519 over the dot-joined string `slice_hash.cursor_from.cursor_to.view.view_version.row_count`; public_key and sig are base64url of the raw 32-byte key / 64-byte signature",
  "receipt": null,
  "receipt_note": "this revision predates receipt-keeping (before v0.37.0); the filed row lives in the record",
  "generation_chain": {
    "wire": {
      "stream": "fountain_news",
      "story_id": "625ae8458232aee8069f1a3b9ff011fd",
      "thread_id": "deef866c16bbc75db2533fcd40a8082b",
      "thread_label": "Nord Pool",
      "novelty": "UPDATE",
      "content_hash": "93a7e35f10b08d814267321c472f0d1ec47a797dd3103e19b04072b09a51b702",
      "last_published_at": "2026-09-02T11:15:00.000Z",
      "read_receipt": {
        "slice_hash": "d2caee06ef24006f0dd17c7361a34231382696021586171e4bbbf84582898f33",
        "cursor_from": "eyJ0cyI6IjIwMjYtMDktMDJUMTE6MDA6MjIuMDAwMDAwWiIsImlkIjoiM2RkNTFiYjNlY2NkMTFkMzc0ZmJjN2UyNWU0OTBhOWYiLCJ2IjoiMSJ9",
        "cursor_to": "eyJ0cyI6IjIwMjYtMDktMDJUMTI6MDc6NDUuMDAwMDAwWiIsImlkIjoiNzY2YWRiYjk1OTBjMDc4M2RhNGEwZGY0YTM5OTFhNGMiLCJ2IjoiMSJ9",
        "view": "v_fountain_news",
        "view_version": "1",
        "row_count": 96,
        "window_days": 3,
        "bytes_scanned": 12017721,
        "credits": 7.68,
        "price_per_100_rows": 8,
        "sig": "nGS7Ola_o177GOTTq3Zrjbgx0igmfv9NR6ouRT77rxPv63knBfy9LLzT53vMyeABE2KSWXeJUHm4RvGMXZJpAQ",
        "public_key": "bMUigy8O0jOnBxQ4Sc-5lwhIZ8LQVAhxMbR7qESVuUE",
        "signer_path": "lakehouse/data-extract/v1",
        "alg": "Ed25519",
        "signed": true
      }
    },
    "written_at": "2026-09-02T22:46:34.670Z"
  },
  "cited_facts": [
    {
      "statement": "The average hourly electricity price for Finnish consumers will rise to a peak of 12.3 cents per kilowatt-hour on Wednesday, including a 25.5% value-added tax.",
      "source": "Kauppalehti",
      "instrument": "News",
      "claim_key": null,
      "published_at": "2026-09-01T11:15:00.000Z",
      "publisher_count": 1,
      "sources": [
        "Kauppalehti"
      ]
    },
    {
      "statement": "In a five-dataset electricity-price setting, the CastClaw authors report the lowest point-estimate MSE and MAE among 16 baseline models.",
      "source": "arXiv.org",
      "instrument": "News",
      "claim_key": null,
      "published_at": "2026-09-01T04:00:00.000Z",
      "publisher_count": 1,
      "sources": [
        "arXiv.org"
      ]
    },
    {
      "statement": "In the arXiv preprint 2608.30976 submitted on 31 August 2026, the authors present CastClaw, a human-in-the-loop autonomous forecasting system built through forecasting-oriented harness engineering.",
      "source": "arXiv.org",
      "instrument": "News",
      "claim_key": null,
      "published_at": "2026-09-01T04:00:00.000Z",
      "publisher_count": 1,
      "sources": [
        "arXiv.org"
      ]
    },
    {
      "statement": "The highest hourly price of the day is expected at 10:00 on Wednesday, while the lowest price is 4.4 cents per kilowatt-hour at 3:00.",
      "source": "Kauppalehti",
      "instrument": "News",
      "claim_key": null,
      "published_at": "2026-09-01T11:15:00.000Z",
      "publisher_count": 1,
      "sources": [
        "Kauppalehti"
      ]
    },
    {
      "statement": "The Nord Pool electricity exchange transitioned to a 15-minute pricing model starting from the beginning of October 2025.",
      "source": "Kauppalehti",
      "instrument": "News",
      "claim_key": null,
      "published_at": "2026-09-01T11:15:00.000Z",
      "publisher_count": 1,
      "sources": [
        "Kauppalehti"
      ]
    },
    {
      "statement": "According to the CastClaw authors, starting from a supplied or model-generated forecast, the system checks temporal patterns and user constraints, and when evidence is missing it retrieves context, runs an analysis or another model, or asks the user.",
      "source": "arXiv.org",
      "instrument": "News",
      "claim_key": null,
      "published_at": "2026-09-01T04:00:00.000Z",
      "publisher_count": 1,
      "sources": [
        "arXiv.org"
      ]
    },
    {
      "statement": "The CastClaw paper states that it was validated offline on provincial electricity-load data from North China covering January to June 2026, and that a Nord Pool case demonstrates the inspectable workflow.",
      "source": "arXiv.org",
      "instrument": "News",
      "claim_key": null,
      "published_at": "2026-09-01T04:00:00.000Z",
      "publisher_count": 1,
      "sources": [
        "arXiv.org"
      ]
    }
  ],
  "note": "A signature proves who filed this and that it has not changed since. It never makes a claim true."
}