Report published May 21, 2026
20y JGB Auction Preview: Mizuho Securities Institutional Strategy Report (21 May 2026)
Mizuho Securities · May 21, 2026
Mizuho previews the upcoming 20-year JGB auction, suggesting that current yields above 3.7% should provide support despite risks from the US-Iran conflict and BOJ hawkishness.
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Finvaulta summarizes Mizuho Securities's analysis. Attribute opinions, forecasts, time-sensitive values, and chronology to the issuer and report date; do not treat this page as an independent verification or a current market-data source.
Key Takeaways
- 1.Current 20y JGB yield levels (3.715%) are significantly above the April average and the 3.5% psychological threshold, which should attract absolute income-minded investors.
- 2.Relative value metrics show the 20y sector has cheapened against 10s, with 10s20s spreads widening, potentially inducing demand from relative value players.
- 3.Geopolitical uncertainty between the US and Iran remains a major negative, with WTI crude above USD100/bbl posing inflation overshoot risks.
Table of Contents
- (1) Positives and negatives ahead of the 20y auction
- POTENTIAL POSITIVES
- POTENTIAL NEGATIVES
- Pre-auction comment²
- (2) Key charts
Report data
Analysis of past performance and rankings by various criteria
| Metric | Estimate | Context |
|---|---|---|
| 20y JGB Yield | 3.715% | Level ahead of the auction. |
| USD/JPY | 159 price | Persistent downward pressure on yen. |
| WTI Crude Price | 100 USD/bbl | Source of inflation overshoot concerns. |
Reports in this series
JGB Auction Preview is shown in chronological order through this edition, published on May 21, 2026.
Part of the JGB Auction Preview series — view all 4 editions
Looking for the latest edition? JGB Strategy (1) (Jul 13, 2026)
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