Official Result (MOF)
| Auction Date | 1987-01-06 |
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| Issue Date | 1987-01-20 |
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| Issue | JGB (2-Year) No. 31（new） |
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| Coupon (%) | 4.2% |
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| Maturity | 1989-01-20 |
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| Method | price conventional |
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| Offering | ¥200B |
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| Competitive Bids | ¥545.8B |
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| Accepted Amount | ¥231.6B |
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| Lowest Accepted Price | 99.49（4.477%） |
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| Weighted Avg Price | 99.55（4.443%） |
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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 |
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| Bid/Cover | 2.36 | 1.62 | 1.46 | 1.17 | 2.29 | +2.63 |
| Tail (sen) | 6 | 8 | 12 | 7 | 19 | -1.67 |
| Non-competitive take-up | 0.0% | 0.0% | |
| Grade | A (score +2.15) | (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) | 3.4 | 4.8 |
Same-tenor Auction History