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 32.5y） |
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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 | ¥459B（17.6%）（as of 2026-08-31・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 | 0.242466 (177 days) per 100 |
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| Settlement Amount | — |
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| Modified Duration | 29.92 |
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| Macaulay Duration | 30.00 |
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| DV01 | — |
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| Convexity | 959.8 |
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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 2026-09-13 ・ CMT 2026-09-10
| CMT interpolated (rem 32.5y) | 3.997 % → ref. price 36.642 |
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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 2026-12-13 | -50bp | 3.497 | 42.275 | -0.127 | +14.93% | +59.72% |
| -25bp | 3.747 | 39.476 | -0.127 | +7.34% | +29.36% |
| Unchanged (roll-down) | 3.997 | 36.884 | -0.127 | +0.31% | +1.25% |
| +25bp | 4.247 | 34.484 | -0.127 | -6.20% | -24.78% |
| +50bp | 4.497 | 32.260 | -0.127 | -12.23% | -48.90% |
| 6m 2027-03-13 | -50bp | 3.497 | 42.518 | 0.246 | +16.60% | +33.20% |
| -25bp | 3.747 | 39.719 | 0.246 | +9.01% | +18.02% |
| Unchanged (roll-down) | 3.997 | 37.126 | 0.246 | +1.98% | +3.96% |
| +25bp | 4.247 | 34.723 | 0.246 | -4.54% | -9.07% |
| +50bp | 4.497 | 32.495 | 0.246 | -10.58% | -21.15% |
| 12m 2027-09-13 | -50bp | 3.496 | 43.018 | 0.500 | +18.64% | +18.64% |
| -25bp | 3.746 | 40.220 | 0.500 | +11.06% | +11.06% |
| Unchanged (roll-down) | 3.996 | 37.624 | 0.500 | +4.02% | +4.02% |
| +25bp | 4.246 | 35.216 | 0.500 | -2.51% | -2.51% |
| +50bp | 4.496 | 32.981 | 0.500 | -8.57% | -8.57% |