Mizuho Securities logo
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

Document Preview

Page 1 of 5
Page 1 of 20y JGB Auction Preview
Subscribe for full access

Access the Full Report

Get unlimited access to institutional research reports with a 14-day free trial.