bonds / 40Y / JGB (40-Year) No. 12
Bond Information
| Name | JGB (40-Year) No. 12 |
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| ISIN | — |
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| Issue # | 12 |
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| Coupon (%) | 0.5% semi-annual |
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| Issue Date | 2019-05-29 |
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| Maturity | 2059-03-20 （Remaining 32.4y） |
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| Outstanding | ¥2.6T （2026-03-31・MOF） |
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| Total issued | ¥3.1T （annual report, FY-end） |
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| Statutory basis | 4条借換前倒財投 |
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| STRIPS principal | ¥100M （2026-09-30） |
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| SLF usage | last 30d ¥2.8B／ total ¥35.8B（last 2026-10-07・BOJ） |
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| BOJ Holding | ¥477.3B（18.3%）（as of 2026-10-20・Source: BOJ・Ratios approximate due to differing as-of dates） |
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| Status | active |
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Results
Yield Calculator (price input) | Simple Yield | 0.500 % |
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| Compound Yield | 0.4997 % |
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| Accrued Interest | 0.052055 (38 days) per 100 |
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| Settlement Amount | — |
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| Modified Duration | 29.88 |
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| Macaulay Duration | 29.95 |
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| DV01 | — |
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| Convexity | 954.8 |
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Estimates based on the input price.
Cashflow Schedule
| Date | Type | Amount (per 100) |
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| 2027-03-20 | coupon | 0.250 |
| 2027-09-20 | coupon | 0.250 |
| 2028-03-20 | coupon | 0.250 |
| …（60 omitted）… |
| 2058-09-20 | coupon | 0.250 |
| 2059-03-20 | coupon + redemption | 100.250 |
Related Auctions
Horizon total return settle 2026-10-28 ・ CMT 2026-10-23
| CMT interpolated (rem 32.4y) | 3.906 % → ref. price 37.685 |
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| G-spread (vs interpolated CMT) | — |
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| Horizon | Scenario | Yield@H | Price@H | Carry | Total return | Ann. |
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| 3m 2027-01-28 | -50bp | 3.405 | 43.475 | 0.126 | +15.68% | +62.71% |
| -25bp | 3.655 | 40.597 | 0.126 | +8.05% | +32.20% |
| Unchanged (roll-down) | 3.905 | 37.930 | 0.126 | +0.98% | +3.94% |
| +25bp | 4.155 | 35.461 | 0.126 | -5.56% | -22.24% |
| +50bp | 4.405 | 33.172 | 0.126 | -11.62% | -46.50% |
| 6m 2027-04-28 | -50bp | 3.405 | 43.716 | 0.251 | +16.65% | +33.30% |
| -25bp | 3.655 | 40.838 | 0.251 | +9.02% | +18.04% |
| Unchanged (roll-down) | 3.905 | 38.171 | 0.251 | +1.95% | +3.91% |
| +25bp | 4.155 | 35.699 | 0.251 | -4.60% | -9.19% |
| +50bp | 4.405 | 33.407 | 0.251 | -10.67% | -21.34% |
| 12m 2027-10-28 | -50bp | 3.405 | 44.218 | 0.500 | +18.64% | +18.64% |
| -25bp | 3.655 | 41.342 | 0.500 | +11.01% | +11.01% |
| Unchanged (roll-down) | 3.905 | 38.673 | 0.500 | +3.94% | +3.94% |
| +25bp | 4.155 | 36.198 | 0.500 | -2.62% | -2.62% |
| +50bp | 4.405 | 33.900 | 0.500 | -8.71% | -8.71% |