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Mizuho Securities

May 15, 2026

30y JGB Auction Preview

Rates StrategyRates Govt BondsOther

Mizuho previews the upcoming 30y JGB auction, arguing that yield levels of 3.81% look appealing for outright longs despite Middle East uncertainty and BOJ rate hike signals.

Key Takeaways

  • 1.The 30y JGB yield has risen to 3.810%, a level that is expected to attract investors historically sensitive to high absolute yields.
  • 2.Strong demand from domestic trust banks is expected due to portfolio rebalancing following the Nikkei 225 moving above 60,000.
  • 3.Middle East tensions (Iran conflict) are driving energy prices higher, leading to potential fiscal expansion concerns in Japan, though Mizuho sees limited scope for increased JGB issuance.

Table of Contents

  • (1) Positives and negatives ahead of the 30y auction
  • POTENTIAL POSITIVES
  • POTENTIAL NEGATIVES
  • Auction strategy
  • OUTRIGHT LONGS
  • (2) Key charts

Document Preview

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Page 1 of 30y JGB Auction Preview
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