Mizuho Securities
May 21, 2026
20y JGB Auction Preview
Rates StrategyRates Govt BondsCommoditiesFXOther
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.
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
- Important Disclosure Information
- Analyst Certification
- Disclaimer
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Authors
Yuhi Kawano
Securities
JL196USDJPYCL1
Themes
Monetary Policy DivergenceGeopolitical Risk Premia
Regions
Asia PacificJapanUnited StatesIran
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