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Mizuho Securities

June 12, 2026

30y JGB Auction Preview

Rates StrategyRates Govt BondsOther

This report previews the 30y JGB auction, weighing fiscal headwinds against attractive yields and stabilized interest rate expectations. Analysts see limited near-term room for super-long yield spikes, though fiscal policy remains a key uncertainty.

Key Takeaways

  • 1.The 30y JGB auction faces volatility from fiscal expansion concerns, but medium-term holding is viable given the BOJ policy terminal rate is largely priced in.

Table of Contents

  • Positives and negatives ahead of the 30y auction
  • POTENTIAL POSITIVES
  • POTENTIAL NEGATIVES
  • Auction strategy
  • 30Y ASSET SWAPS AND/OR OUTRIGHT LONGS WITH A MEDIUM-TERM HORIZON
  • Key charts

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