bonds / 20Y / JGB (20-Year) No. 129
Bond Information
| Name | JGB (20-Year) No. 129 |
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| ISIN | — |
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| Issue # | 129 |
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| Coupon (%) | 1.8% semi-annual |
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| Issue Date | 2011-08-30 |
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| Maturity | 2031-06-20 （Remaining 4.8y） |
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| Outstanding | ¥1.6T （2026-03-31・MOF） |
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| Total issued | ¥1.5T （annual report, FY-end） |
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| Statutory basis | 借換前倒 |
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| SLF usage | last 30d —／ total ¥8.3B（last 2026-03-09・BOJ） |
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| BOJ Holding | ¥1T（63.3%）（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 | 1.800 % |
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| Compound Yield | 1.7987 % |
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| Accrued Interest | 0.315616 (64 days) per 100 |
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| Settlement Amount | — |
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| Modified Duration | 4.59 |
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| Macaulay Duration | 4.63 |
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| DV01 | — |
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| Convexity | 23.9 |
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Estimates based on the input price.
Cashflow Schedule
| Date | Type | Amount (per 100) |
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| 2026-12-20 | coupon | 0.900 |
| 2027-06-20 | coupon | 0.900 |
| 2027-12-20 | coupon | 0.900 |
| …（5 omitted）… |
| 2030-12-20 | coupon | 0.900 |
| 2031-06-20 | coupon + redemption | 100.900 |
Related Auctions
| Auction Date | | Bid/Cover | Tail (sen) | Avg Yield (%) |
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| 2011-08-25 | new | 3.12 | 7 | 1.857 |
Horizon total return settle 2026-08-23 ・ CMT 2026-08-20
| CMT interpolated (rem 4.8y) | 2.105 % → ref. price 98.603 |
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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 | 1.573 | 100.995 | 0.454 | +2.88% | +11.51% |
| -25bp | 1.823 | 99.896 | 0.454 | +1.77% | +7.06% |
| Unchanged (roll-down) | 2.073 | 98.810 | 0.454 | +0.67% | +2.67% |
| +25bp | 2.323 | 97.738 | 0.454 | -0.42% | -1.66% |
| +50bp | 2.573 | 96.679 | 0.454 | -1.49% | -5.94% |
| 6m 2027-02-23 | -50bp | 1.541 | 101.077 | 0.905 | +3.42% | +6.83% |
| -25bp | 1.791 | 100.035 | 0.905 | +2.36% | +4.73% |
| Unchanged (roll-down) | 2.041 | 99.006 | 0.905 | +1.32% | +2.64% |
| +25bp | 2.291 | 97.988 | 0.905 | +0.29% | +0.59% |
| +50bp | 2.541 | 96.982 | 0.905 | -0.72% | -1.45% |
| 12m 2027-08-23 | -50bp | 1.467 | 101.228 | 1.800 | +4.47% | +4.47% |
| -25bp | 1.717 | 100.299 | 1.800 | +3.53% | +3.53% |
| Unchanged (roll-down) | 1.967 | 99.379 | 1.800 | +2.61% | +2.61% |
| +25bp | 2.217 | 98.470 | 1.800 | +1.69% | +1.69% |
| +50bp | 2.467 | 97.570 | 1.800 | +0.78% | +0.78% |