bonds / 20Y / JGB (20-Year) No. 128
Bond Information
| Name | JGB (20-Year) No. 128 |
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| ISIN | — |
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| Issue # | 128 |
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| Coupon (%) | 1.9% semi-annual |
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| Issue Date | 2011-06-20 |
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| Maturity | 2031-06-20 （Remaining 4.6y） |
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| Outstanding | ¥2.8T （2026-03-31・MOF） |
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| Total issued | ¥2.7T （annual report, FY-end） |
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| Statutory basis | 4条借換前倒 |
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| STRIPS principal | ¥400M （2026-09-30） |
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| SLF usage | last 30d —／ total ¥139.6B（last 2026-08-17・BOJ） |
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| BOJ Holding | ¥1.7T（60.8%）（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 | 1.900 % |
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| Compound Yield | 1.8986 % |
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| Accrued Interest | 0.676712 (130 days) per 100 |
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| Settlement Amount | — |
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| Modified Duration | 4.40 |
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| Macaulay Duration | 4.44 |
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| DV01 | — |
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| Convexity | 22.1 |
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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 | 0.950 |
| 2027-06-20 | coupon | 0.950 |
| 2027-12-20 | coupon | 0.950 |
| …（5 omitted）… |
| 2030-12-20 | coupon | 0.950 |
| 2031-06-20 | coupon + redemption | 100.950 |
Related Auctions
Horizon total return settle 2026-10-28 ・ CMT 2026-10-23
| CMT interpolated (rem 4.6y) | 2.196 % → ref. price 98.692 |
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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 | 1.667 | 100.981 | -0.474 | +1.83% | +7.31% |
| -25bp | 1.917 | 99.926 | -0.474 | +0.77% | +3.06% |
| Unchanged (roll-down) | 2.167 | 98.884 | -0.474 | -0.28% | -1.13% |
| +25bp | 2.417 | 97.854 | -0.474 | -1.32% | -5.28% |
| +50bp | 2.667 | 96.836 | -0.474 | -2.34% | -9.38% |
| 6m 2027-04-28 | -50bp | 1.638 | 101.043 | 0.945 | +3.32% | +6.63% |
| -25bp | 1.888 | 100.044 | 0.945 | +2.31% | +4.62% |
| Unchanged (roll-down) | 2.138 | 99.057 | 0.945 | +1.32% | +2.64% |
| +25bp | 2.388 | 98.080 | 0.945 | +0.34% | +0.67% |
| +50bp | 2.638 | 97.115 | 0.945 | -0.64% | -1.27% |
| 12m 2027-10-28 | -50bp | 1.570 | 101.158 | 1.900 | +4.39% | +4.39% |
| -25bp | 1.820 | 100.273 | 1.900 | +3.50% | +3.50% |
| Unchanged (roll-down) | 2.070 | 99.398 | 1.900 | +2.62% | +2.62% |
| +25bp | 2.320 | 98.532 | 1.900 | +1.75% | +1.75% |
| +50bp | 2.570 | 97.674 | 1.900 | +0.89% | +0.89% |