Official Result (MOF)
| Auction Date | 1988-11-01 |
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| Issue Date | 1988-11-21 |
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| Issue | JGB (20-Year) No. 9（new） |
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| Coupon (%) | 5% |
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| Maturity | 2009-03-20 |
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| Method | price conventional |
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| Offering | ¥400B |
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| Competitive Bids | ¥1.1T |
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| Accepted Amount | ¥425.4B |
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| Lowest Accepted Price | 99.25（5.074%） |
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| Weighted Avg Price | 99.43（5.056%） |
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| Allotment Ratio | — |
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| Non-competitive I | — |
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| Non-competitive II | — |
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Source: https://www.mof.go.jp/jgbs/reference/appendix/jgb_historical_data.xls
Derived Metrics calc auction-v1 / auction-v2
| This | Prev | avg (12) | min | max | z |
|---|
| Bid/Cover | 2.55 | 1.35 | 1.96 | 1.35 | 2.79 | +0.87 |
| Tail (sen) | 18 | 58 | 63 | 18 | 118 | -1.10 |
| Non-competitive take-up | 0.0% | 0.0% | |
| Grade | B (score +0.99) | (z(B/C) − z(tail))/2 bucketed A(≥1)/B(≥0.3)/C/D(≤−0.3)/E(≤−1), vs last 12 same-tenor |
| Yield tail (bp) | 1.8 | 6.2 |
Same-tenor Auction History
| Auction Date | Issue | Bid/Cover | Tail (sen) | Avg Yield (%) |
|---|
| 1988-11-01 | JGB (20-Year) No. 9 | 2.55 | 18 | 5.056 |
| 1988-07-21 | JGB (20-Year) No. 8 | 1.35 | 58 | 5.437 |
| 1988-04-19 | JGB (20-Year) No. 7 | 2.76 | 20 | 4.993 |
| 1988-02-18 | JGB (20-Year) No. 6 | 2.79 | 18 | 5.296 |
| 1987-12-01 | JGB (20-Year) No. 5 | 1.35 | 102 | 6.077 |
| 1987-09-01 | JGB (20-Year) No. 4 | 1.56 | 118 | 5.934 |