Official Result (MOF)
| Auction Date | 2010-02-09 |
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| Issue Date | 2010-02-15 |
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| Issue | JGB (30-Year) No. 31（reopen） |
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| Coupon (%) | 2.2% |
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| Maturity | 2039-09-20 |
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| Method | price conventional |
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| Offering | ¥600B |
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| Competitive Bids | ¥2.1T |
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| Accepted Amount | ¥549.3B |
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| Lowest Accepted Price | 98.10（2.308%） |
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| Weighted Avg Price | 98.15（2.305%） |
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| Allotment Ratio | — |
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| Non-competitive I | ¥50B |
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| Non-competitive II | ¥83.4B |
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Source: https://www.mof.go.jp/jgbs/reference/appendix/jgb_historical_data.xls
Offering Terms (from MOF notice) documents →
| Official name | 利付国庫債券（30年）（第31回） |
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| Legal basis | 特別会計に関する法律（平成19年法律第23号）第46条第1項及び第47条 |
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| Coupon dates | 毎年3月20日及び9月20日 |
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| Planned amount | ¥600B |
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| Bid deadline | 2010-02-09 12:00 |
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| Payment date | 2010-02-15 |
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| Non-competitive II | held |
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| Price terms | — |
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Derived Metrics calc auction-v1 / auction-v2
| This | Prev | avg (12) | min | max | z |
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| Bid/Cover | 3.87 | 3.53 | 3.47 | 2.50 | 3.92 | +1.00 |
| Tail (sen) | 5 | 34 | 13 | 4 | 34 | -0.84 |
| Non-competitive take-up | 19.5% | 8.2% | |
| Grade | B (score +0.92) | (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) | 0.3 | 1.9 |
Same-tenor Auction History