bonds / 20Y / JGB (20-Year) No. 178
Bond Information
| Name | JGB (20-Year) No. 178 |
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| ISIN | — |
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| Issue # | 178 |
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| Coupon (%) | 0.5% semi-annual |
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| Issue Date | 2021-10-20 |
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| Maturity | 2041-09-20 （Remaining 14.9y） |
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| Outstanding | ¥3.8T （2026-03-31・MOF） |
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| Total issued | ¥3.9T （annual report, FY-end） |
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| Statutory basis | 4条特例借換前倒財投 |
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| SLF usage | last 30d —／ total ¥35.1B（last 2026-09-04・BOJ） |
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| BOJ Holding | ¥236.2B（6.2%）（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 | 0.4996 % |
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| Accrued Interest | 0.052055 (38 days) per 100 |
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| Settlement Amount | — |
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| Modified Duration | 14.34 |
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| Macaulay Duration | 14.38 |
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| DV01 | — |
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| Convexity | 217.7 |
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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 |
| …（25 omitted）… |
| 2041-03-20 | coupon | 0.250 |
| 2041-09-20 | coupon + redemption | 100.250 |
Related Auctions
Horizon total return settle 2026-10-28 ・ CMT 2026-10-23
| CMT interpolated (rem 14.9y) | 3.362 % → ref. price 66.656 |
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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 | 2.835 | 72.155 | 0.126 | +8.43% | +33.73% |
| -25bp | 3.085 | 69.705 | 0.126 | +4.76% | +19.03% |
| Unchanged (roll-down) | 3.335 | 67.343 | 0.126 | +1.22% | +4.88% |
| +25bp | 3.585 | 65.067 | 0.126 | -2.19% | -8.77% |
| +50bp | 3.835 | 62.873 | 0.126 | -5.48% | -21.93% |
| 6m 2027-04-28 | -50bp | 2.808 | 72.794 | 0.251 | +9.58% | +19.15% |
| -25bp | 3.058 | 70.360 | 0.251 | +5.93% | +11.86% |
| Unchanged (roll-down) | 3.308 | 68.013 | 0.251 | +2.41% | +4.82% |
| +25bp | 3.558 | 65.749 | 0.251 | -0.98% | -1.97% |
| +50bp | 3.808 | 63.566 | 0.251 | -4.26% | -8.51% |
| 12m 2027-10-28 | -50bp | 2.755 | 74.093 | 0.500 | +11.90% | +11.90% |
| -25bp | 3.005 | 71.695 | 0.500 | +8.30% | +8.30% |
| Unchanged (roll-down) | 3.255 | 69.380 | 0.500 | +4.83% | +4.83% |
| +25bp | 3.505 | 67.144 | 0.500 | +1.48% | +1.48% |
| +50bp | 3.755 | 64.985 | 0.500 | -1.76% | -1.76% |