## 日本保險公司超長期 JGB 淨買賣驗證報告
**分析期間**:2022-04 ~ 2025-12(45 個月)
### 核心結論
| 指標 | 數值 | 說明 |
|------|------|------|
| 本月(2025-12)| **8,224 億日圓** | 淨賣出 |
| 是否創歷史紀錄 | **✓ 是** | 全樣本 (45 個月) |
| 連續淨賣出月數 | **5 個月** | 自 2025-08 起 |
| 本輪累積淨賣出 | **13,959 億日圓** | 1.40 兆日圓 |
### Headline Takeaways
1. ✓ 驗證屬實:日本保險公司在 2025/12 創下歷史最大單月淨賣出
2. 已連續 5 個月淨賣出超長期國債,累積 1.40 兆日圓
3. 當前淨賣出規模處於歷史極端區間(Z-score: 2.71)
{
"skill": "analyze_jgb_insurer_superlong_flow",
"version": "1.0.0",
"as_of": "2026-01-26",
"data_source": {
"name": "JSDA Trading Volume of OTC Bonds (公社債店頭売買高)",
"url": "https://www.jsda.or.jp/shiryoshitsu/toukei/tentoubaibai/",
"sheet": "(J)合計差引"
},
"parameters": {
"investor_group": "life_and_nonlife_insurance",
"investor_label": "生保・損保 (Life & Non-Life Insurance Companies)",
"maturity_bucket": "super_long",
"maturity_label": "超長期 (Interest-bearing Long-term over 10-year)",
"sign_convention": "正值=淨賣出 (Sell-Purchase), 負值=淨買入",
"unit": "100 million yen (億円)"
},
"analysis_period": {
"start": "2022-04",
"end": "2025-12",
"months": 45
},
"latest_month": {
"date": "2025-12",
"net_sale_100m_yen": 8224,
"net_sale_trillion_yen": 0.8224,
"interpretation": "淨賣出"
},
"record_analysis": {
"is_record_sale": true,
"record_sale_100m_yen": 8224,
"record_sale_date": "2025-12",
"record_purchase_100m_yen": -8889,
"record_purchase_date": "2023-03",
"lookback_period": "全樣本 (45 個月)"
},
"streak_analysis": {
"consecutive_net_sale_months": 5,
"streak_start": "2025-08",
"cumulative_net_sale_100m_yen": 13959,
"cumulative_net_sale_trillion_yen": 1.3959
},
"historical_stats": {
"mean_100m_yen": -2025,
"std_100m_yen": 3785,
"latest_zscore": 2.71,
"latest_percentile": 0.9778
},
"headline_takeaways": [
"✓ 驗證屬實:日本保險公司在 2025/12 創下歷史最大單月淨賣出(8,224 億日圓)",
"已連續 5 個月淨賣出超長期國債,累積金額 13,959 億日圓(1.40 兆日圓)",
"當前淨賣出規模處於歷史極端區間(Z-score: 2.71,超過 2 個標準差)"
]
}
analyze-jgb-insurer-superlong-flow/
├── SKILL.md # 本文件(主入口)
├── skill.yaml # 前端展示元數據
├── workflows/
│ ├── quick-check.md # 快速檢查工作流
│ ├── full-analysis.md # 完整分析工作流
│ └── verify-claim.md # 驗證新聞工作流
├── references/
│ ├── data-sources.md # 資料來源說明
│ └── methodology.md # 方法論與公式
├── scripts/
│ └── jsda_flow_analyzer.py # 主分析腳本(含數據下載)
└── data/
└── cache/ # 自動緩存目錄(.gitignore)