{
  "series_id": "drv.hedge_cost.jpy.rate_component",
  "label": "為替ヘッジコストの金利差成分（円→ドル・1年物）",
  "layer": 2,
  "source_class": "DERIVED",
  "unit": "percent (annualized)",
  "cadence": "daily",
  "algorithm": "hedge-rate-component@1",
  "code_sha256": "6ac9c87f37dc34cfe79313451a03c9875a9a757a83bbdb97cec77cef7dcab221",
  "code_commit": null,
  "definition": "米国債1年利回り − 日本国債1年利回り。円建て投資家がドル資産をヘッジする際のコストのうち、金利差に由来する部分。",
  "not_hedge_cost": "本系列はヘッジコストそのものではない。実務のコストは『金利差成分 ＋ クロスカレンシー・ベーシス』であり、後者は市場の気配値で、公開一次ソースから再配布可能な形で取得する手段を当所は確立できていない。円のベーシスは局面により20〜80bp以上となり、期末には一時的にさらに拡大する。したがって本系列だけで実務コストの水準は再現できない。",
  "tenor_note": "実務のヘッジは3ヶ月物が主流だが、円側の3ヶ月物について日次で取得できる一次ソースを当所は確立できていない（財務省 国債金利情報は1年から）。年限の異なる2つを引くと金利差ではない数字になるため、1年物で年限を揃えている。米国側の 3M−1Y スプレッド（us_front_slope_3m_1y、bp）を併記する。正なら3ヶ月物の金利差は1年物より大きい。",
  "interpretation_limit": "本系列はヘッジ比率を動かす動機の側を測るものであり、行動そのものの観測ではない。実際の比率変更は生保の運用計画（4月下旬・10月下旬）と財務省の対外証券投資（週次）で確認すること。",
  "inputs": [
    {
      "publisher": "Federal Reserve",
      "release": "H.15 Selected Interest Rates",
      "series": "RIFLGFCY01_N.B",
      "source_class": "OFFICIAL_PUBLIC",
      "url": "https://www.federalreserve.gov/datadownload/Output.aspx?rel=H15"
    },
    {
      "publisher": "財務省",
      "release": "国債金利情報（全履歴）",
      "series": "1年",
      "source_class": "OFFICIAL_PUBLIC",
      "url": "https://www.mof.go.jp/jgbs/reference/interest_rate/data/jgbcm_all.csv"
    }
  ],
  "latest": {
    "record_id": "drv.hedge_cost.jpy.rate_component:2026-08-28:r0:693f6eed40f6",
    "observation_date": "2026-08-28",
    "observation_precision": "date",
    "publisher_release_at": "2026-08-28T16:15:00-04:00",
    "release_at_method": "rule_derived",
    "release_rule_id": "drv.gap.jp_us.binding_us",
    "release_lag_days": 0,
    "release_note": "米H.15（当日16:15 ET）と財務省 国債金利情報の遅い方で既知になる。財務省側の公表時刻は当所で未確立のため、拘束的とみなせる米側の時刻を用いる。確立次第、遅い方に改める",
    "release_at_confidence": "binding_side_only",
    "source_first_seen_at": "2026-09-01T13:43:36.002Z",
    "ingested_at": "2026-09-01T13:43:44.004Z",
    "value": "2.667",
    "us1y": "4.150",
    "jp1y": "1.483",
    "status": "ORIGINAL",
    "revision_seq": 0,
    "supersedes_record_id": null,
    "us3m": "3.900",
    "us_front_slope_3m_1y": "-25.0"
  },
  "derived": {
    "algorithm": "hedge-rate-component@1",
    "code_sha256": "6ac9c87f37dc34cfe79313451a03c9875a9a757a83bbdb97cec77cef7dcab221",
    "percentile_5y": 28.8,
    "percentile_5y_n": 1262,
    "percentile_definition": "直近1300営業日のうち、現在値以下の観測が占める割合",
    "range_5y_low": "0.160",
    "range_5y_high": "5.558",
    "delta_1d_bp": "+8.8",
    "delta_1m_bp": "-14.1",
    "delta_3m_bp": "-2.8",
    "delta_1y_bp": "-54.2",
    "direction_note": "低下は、ヘッジを掛け直す動機が強まる方向。ただし比率が実際に動いたかは本系列では分からない。",
    "front_slope_note": "us_front_slope_3m_1y が負のとき、米国の3ヶ月物は1年物より低い。円側の曲線が平坦であれば、実務で使う3ヶ月物の金利差は本系列（1年物）より小さいことになる。この傾きは、短期の利下げ観測が織り込まれた度合いを表す。"
  },
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      "release_note": "米H.15（当日16:15 ET）と財務省 国債金利情報の遅い方で既知になる。財務省側の公表時刻は当所で未確立のため、拘束的とみなせる米側の時刻を用いる。確立次第、遅い方に改める",
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      "release_note": "米H.15（当日16:15 ET）と財務省 国債金利情報の遅い方で既知になる。財務省側の公表時刻は当所で未確立のため、拘束的とみなせる米側の時刻を用いる。確立次第、遅い方に改める",
      "release_at_confidence": "binding_side_only",
      "source_first_seen_at": "2026-09-01T13:43:36.002Z",
      "ingested_at": "2026-09-01T13:43:44.004Z",
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      "observation_precision": "date",
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      "release_at_method": "rule_derived",
      "release_rule_id": "drv.gap.jp_us.binding_us",
      "release_lag_days": 0,
      "release_note": "米H.15（当日16:15 ET）と財務省 国債金利情報の遅い方で既知になる。財務省側の公表時刻は当所で未確立のため、拘束的とみなせる米側の時刻を用いる。確立次第、遅い方に改める",
      "release_at_confidence": "binding_side_only",
      "source_first_seen_at": "2026-09-01T13:43:36.002Z",
      "ingested_at": "2026-09-01T13:43:44.004Z",
      "value": "0.204",
      "us1y": "0.070",
      "jp1y": "-0.134",
      "status": "ORIGINAL",
      "revision_seq": 0,
      "supersedes_record_id": null,
      "us3m": "0.030",
      "us_front_slope_3m_1y": "-4.0"
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      "observation_date": "2021-04-22",
      "observation_precision": "date",
      "publisher_release_at": "2021-04-22T16:15:00-04:00",
      "release_at_method": "rule_derived",
      "release_rule_id": "drv.gap.jp_us.binding_us",
      "release_lag_days": 0,
      "release_note": "米H.15（当日16:15 ET）と財務省 国債金利情報の遅い方で既知になる。財務省側の公表時刻は当所で未確立のため、拘束的とみなせる米側の時刻を用いる。確立次第、遅い方に改める",
      "release_at_confidence": "binding_side_only",
      "source_first_seen_at": "2026-09-01T13:43:36.002Z",
      "ingested_at": "2026-09-01T13:43:44.004Z",
      "value": "0.194",
      "us1y": "0.060",
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      "us3m": "0.030",
      "us_front_slope_3m_1y": "-3.0"
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      "record_id": "drv.hedge_cost.jpy.rate_component:2021-04-21:r0:a79d8e19b33a",
      "observation_date": "2021-04-21",
      "observation_precision": "date",
      "publisher_release_at": "2021-04-21T16:15:00-04:00",
      "release_at_method": "rule_derived",
      "release_rule_id": "drv.gap.jp_us.binding_us",
      "release_lag_days": 0,
      "release_note": "米H.15（当日16:15 ET）と財務省 国債金利情報の遅い方で既知になる。財務省側の公表時刻は当所で未確立のため、拘束的とみなせる米側の時刻を用いる。確立次第、遅い方に改める",
      "release_at_confidence": "binding_side_only",
      "source_first_seen_at": "2026-09-01T13:43:36.002Z",
      "ingested_at": "2026-09-01T13:43:44.004Z",
      "value": "0.203",
      "us1y": "0.070",
      "jp1y": "-0.133",
      "status": "ORIGINAL",
      "revision_seq": 0,
      "supersedes_record_id": null,
      "us3m": "0.030",
      "us_front_slope_3m_1y": "-4.0"
    },
    {
      "record_id": "drv.hedge_cost.jpy.rate_component:2021-04-20:r0:90c1dce87e20",
      "observation_date": "2021-04-20",
      "observation_precision": "date",
      "publisher_release_at": "2021-04-20T16:15:00-04:00",
      "release_at_method": "rule_derived",
      "release_rule_id": "drv.gap.jp_us.binding_us",
      "release_lag_days": 0,
      "release_note": "米H.15（当日16:15 ET）と財務省 国債金利情報の遅い方で既知になる。財務省側の公表時刻は当所で未確立のため、拘束的とみなせる米側の時刻を用いる。確立次第、遅い方に改める",
      "release_at_confidence": "binding_side_only",
      "source_first_seen_at": "2026-09-01T13:43:36.002Z",
      "ingested_at": "2026-09-01T13:43:44.004Z",
      "value": "0.192",
      "us1y": "0.070",
      "jp1y": "-0.122",
      "status": "ORIGINAL",
      "revision_seq": 0,
      "supersedes_record_id": null,
      "us3m": "0.030",
      "us_front_slope_3m_1y": "-4.0"
    },
    {
      "record_id": "drv.hedge_cost.jpy.rate_component:2021-04-19:r0:3d1ad530c8d5",
      "observation_date": "2021-04-19",
      "observation_precision": "date",
      "publisher_release_at": "2021-04-19T16:15:00-04:00",
      "release_at_method": "rule_derived",
      "release_rule_id": "drv.gap.jp_us.binding_us",
      "release_lag_days": 0,
      "release_note": "米H.15（当日16:15 ET）と財務省 国債金利情報の遅い方で既知になる。財務省側の公表時刻は当所で未確立のため、拘束的とみなせる米側の時刻を用いる。確立次第、遅い方に改める",
      "release_at_confidence": "binding_side_only",
      "source_first_seen_at": "2026-09-01T13:43:36.002Z",
      "ingested_at": "2026-09-01T13:43:44.004Z",
      "value": "0.207",
      "us1y": "0.080",
      "jp1y": "-0.127",
      "status": "ORIGINAL",
      "revision_seq": 0,
      "supersedes_record_id": null,
      "us3m": "0.020",
      "us_front_slope_3m_1y": "-6.0"
    }
  ],
  "quotation_rule": "『ヘッジコスト』として引用しないこと。ベーシスを含まない金利差成分であり、年限は1年物である。status と年限を落として引用しないこと。",
  "output_sha256": "bdfa8d4d78582a398af8fab06c7fa9d2c54a23454a4702b95c2f074265861c70",
  "generated_at": "2026-09-01T13:43:44Z"
}