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 32.6y） |
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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 （2026-06-30） |
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| SLF usage | last 30d —／ total ¥33B（last 2026-07-09・BOJ） |
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| BOJ Holding | ¥458B（17.6%）（as of 2026-08-10・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 | 0.213699 (156 days) per 100 |
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| Settlement Amount | — |
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| Modified Duration | 29.98 |
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| Macaulay Duration | 30.06 |
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| DV01 | — |
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| Convexity | 963.3 |
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Estimates based on the input price.
Cashflow Schedule
| Date | Type | Amount (per 100) |
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| 2026-09-20 | coupon | 0.250 |
| 2027-03-20 | coupon | 0.250 |
| 2027-09-20 | coupon | 0.250 |
| …（61 omitted）… |
| 2058-09-20 | coupon | 0.250 |
| 2059-03-20 | coupon + redemption | 100.250 |
Related Auctions
Horizon total return settle 2026-08-23 ・ CMT 2026-08-20
| CMT interpolated (rem 32.6y) | 3.997 % → ref. price 36.589 |
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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 2026-11-23 | -50bp | 3.497 | 42.225 | -0.126 | +14.97% | +59.89% |
| -25bp | 3.747 | 39.425 | -0.126 | +7.37% | +29.46% |
| Unchanged (roll-down) | 3.997 | 36.834 | -0.126 | +0.32% | +1.29% |
| +25bp | 4.247 | 34.433 | -0.126 | -6.20% | -24.79% |
| +50bp | 4.497 | 32.210 | -0.126 | -12.24% | -48.96% |
| 6m 2027-02-23 | -50bp | 3.496 | 42.472 | 0.250 | +16.67% | +33.33% |
| -25bp | 3.746 | 39.673 | 0.250 | +9.06% | +18.12% |
| Unchanged (roll-down) | 3.996 | 37.079 | 0.250 | +2.01% | +4.03% |
| +25bp | 4.246 | 34.677 | 0.250 | -4.52% | -9.03% |
| +50bp | 4.496 | 32.450 | 0.250 | -10.57% | -21.14% |
| 12m 2027-08-23 | -50bp | 3.496 | 42.962 | 0.500 | +18.68% | +18.68% |
| -25bp | 3.746 | 40.163 | 0.500 | +11.07% | +11.07% |
| Unchanged (roll-down) | 3.996 | 37.568 | 0.500 | +4.02% | +4.02% |
| +25bp | 4.246 | 35.160 | 0.500 | -2.52% | -2.52% |
| +50bp | 4.496 | 32.926 | 0.500 | -8.59% | -8.59% |