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Mizuho Securities

May 18, 2026

Supporters of June Rate Hike May Already Be in Majority on BOJ Policy Board

Rates StrategyRates Govt BondsDerivativesMacro Economic IndicatorsEnergyOther

Mizuho analyzes the BOJ's April Summary of Opinions and recent board member speeches, concluding a majority may support a June rate hike. While JGB yields have risen, Mizuho expects the 10y yield to remain tethered to the medium-term sector.

Key Takeaways

  • 1.The Summary of Opinions from the April BOJ meeting suggests that a majority of the Policy Board may support a rate hike as early as the June meeting.
  • 2.Long-term JGB yields (10y) are unlikely to continue rising independently of medium-term rates, as the latter already price in a terminal rate of approximately 2%.
  • 3.Inflationary concerns driven by the Iran conflict are keeping yields elevated, but the BOJ is expected to prioritize these pressures over growth unless supply exhaustion occurs.

Table of Contents

  • Supporters of June rate hike may already be in majority on BOJ Policy Board
  • 10y JGB yield unlikely to shoot up independently of medium-term rate
  • SPEECH BY BOARD MEMBER KAZUYUKI MASU HINTS AT SUPPORT FOR JUNE RATE HIKE
  • DEVELOPMENTS THIS WEEK AND IMPLICATIONS FOR RATES OUTLOOK
  • SHORT-TERM OUTLOOK (ONE WEEK – ONE MONTH)
  • MEDIUM-TERM OUTLOOK (SEVERAL MONTHS – ONE YEAR)
  • Risk scenarios
  • Yen rates relative value and investment strategies
  • RELATIVE VALUE SCORE TABLES

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