{ "series_id": "gov.jp.jgb_auction", "label": "国債の入札結果（財務省）", "layer": 4, "source_class": "OFFICIAL_PUBLIC", "evidence_relation": "DIRECT", "unit": "ratio / 銭 / percent", "cadence": "event", "algorithm": "jgb-auction@1", "code_sha256": "9755490edd12fc7bcd24161cd076faf02b56b54ea60c80b124be46aa8d9d205c", "code_commit": null, "definition": "財務省が入札ごとに公表する結果。応募額・募入決定額・応札倍率・テール（平均落札価格 − 最低落札価格）・平均利回り・最高利回り。", "why_tail": "応札倍率は発行額に左右される。発行額が減れば、同じ需要でも倍率は上がる。前回比を語るとき、募入決定額が同じかを確かめないと需要の変化と取り違える。テールは発行額に左右されず、応札の散らばりを直接示すため、比較の指標としてより頑健である。当所は両方と募入決定額を併記する。", "percentile_note": "「テールが大きいか」は単独では答えられない。同じ年限の過去の入札と比べて初めて位置が分かる。ただし当所が保持するのは取得を始めて以降のみで、記録開始日を必ず添える。", "no_rating": "入札の強さを段階評価しない。テールが大きいことは需要が弱いことを示唆するとされるが、何をもって弱いとするかの基準を当所は定めない（会則第15条）。数字と分位を並べ、判断は利用者が行う。", "acquisition_note": "財務省は入札結果を日付ごとの個別ページで公表する。一覧から機械的に辿る経路を当所は確立できなかったため、日付からURLを組み立てて取得する。取得できなかった日は欠測とする。", "source": { "publisher": "財務省", "release": "国債の入札結果", "url_pattern": 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"percentile": 45.5 }, "tail_sen": { "current": 12, "mean": 18.3, "median": 12.0, "max": 46.0, "percentile": 57.1 } }, "20y": { "n": 7, "first": "2026-02-19", "last": "2026-08-20", "bid_to_cover": { "current": 3.982, "mean": 3.804, "median": 3.982, "percentile": 57.1 }, "tail_sen": { "current": 17, "mean": 9.6, "median": 6.0, "max": 24.0, "percentile": 85.7 } }, "2y": { "n": 7, "first": "2026-02-27", "last": "2026-08-28", "bid_to_cover": { "current": 2.966, "mean": 3.887, "median": 3.626, "percentile": 14.3 }, "tail_sen": { "current": 3, "mean": 1.1, "median": 1.0, "max": 3.0, "percentile": 100.0 } }, "30y": { "n": 6, "first": "2026-03-05", "last": "2026-08-06", "bid_to_cover": { "current": 3.864, "mean": 3.603, "median": 3.575, "percentile": 83.3 }, "tail_sen": { "current": 21, "mean": 19.2, "median": 19.5, "max": 38.0, "percentile": 66.7 } }, "40y": { "n": 3, "first": "2026-03-24", "last": "2026-07-22", "bid_to_cover": { "current": 2.824, "mean": 2.689, "median": 2.702, "percentile": 100.0 } }, "5y": { "n": 7, "first": "2026-02-17", "last": "2026-08-18", "bid_to_cover": { "current": 4.152, "mean": 3.469, "median": 3.433, "percentile": 100.0 }, "tail_sen": { "current": 2, "mean": 3.3, "median": 3.0, "max": 6.0, "percentile": 28.6 } }, "liquidity": { "n": 13, "first": "2026-02-25", "last": "2026-08-26", "bid_to_cover": { "current": 3.199, "mean": 3.17, "median": 3.177, "percentile": 69.2 } } }, "observations": [ { "record_id": "gov.jp.jgb_auction:2026-09-01:r0:aedde07a8ea6", "observation_date": "2026-09-01", "observation_precision": "date", "publisher_release_at": null, "release_at_method": "unknown", "release_note": "公表時刻を当所で確立できていない。推定値は入れない（会則第11条）", "source_first_seen_at": null, "ingested_at": "2026-09-01T13:41:28.083Z", "value": "3.286", "title": "10年利付国債（第383回）の入札結果（令和8年9月1日入札） : 財務省", "tenor": "10y", "bids_oku": 65385, "accepted_oku": 19896, "bid_to_cover": 3.286, "price_average": "97.76", "price_lowest": "97.64", "tail_sen": 12, "yield_average": "2.995", 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