BOJ hawkish confirmed, dollar at 13-month high: JPY carry trade enters turbulence zone

Context

At the end of June 2026, the BOJ released its Summary of Opinions, revealing majority support among board members for continuing gradual rate hikes. This publication comes as the U.S. dollar hits a 13-month high against a basket of Asian currencies, with the yen and yuan remaining under prolonged pressure (Investing.com, 24/06/2026). The convergence of these two signals creates a market situation unseen since the mini-crash of summer 2024.

Data

• BOJ Summary of Opinions June 2026: majority of board members in favor of continuing rate hikes (Seeking Alpha, 24/06)
• Dollar Index: 13-month high as of 24/06/2026 (Investing.com)
• USD/JPY: yen in continuous slide against the dollar; yuan also under persistent pressure (Investing.com, 24/06)
• Asian emerging market currencies: generalized weakening (rupiah, baht, won) correlated with dollar strength
• Reminder: the August 2024 mini-crash was partly triggered by a brutal unwinding of the JPY carry trade following a hawkish surprise from the BOJ

Analysis

The BOJ is navigating a structural monetary policy dilemma: normalizing too quickly risks triggering a massive unwinding of the JPY carry trade-flows estimated at several hundred billion dollars borrowed at near-zero rates in yen to invest in higher-yielding assets (Treasuries, equities, EM carry). The dollar's strength amplifies selling pressure on the yen, which paradoxically creates demand to keep the carry trade open-until the breaking point. The internal hawkish consensus signals that the BOJ will not back down: the question is the pace, not the direction.

Probability-weighted scenarios

• Base case (50%): the BOJ raises rates by an additional 25 bp in July-September 2026; the yen gradually appreciates toward 150 USD/JPY; partial and orderly unwinding of the carry trade, limited contagion.
• Pessimistic (35%): sudden yen appreciation (USD/JPY below 140) triggered by a hawkish surprise or verbal intervention; rapid and destabilizing unwinding with contagion to global equity markets-echo of August 2024.
• Optimistic (15%): the Fed Warsh signals a pivot in Q3; the dollar retreats, easing pressure on the yen and allowing the BOJ to normalize smoothly over 18 months.

Portfolio implications

Monitor exposure to yield assets implicitly financed by JPY carry. Japanese exporters (Toyota, Sony) are penalized by a strong yen; conversely, Japanese banks (Mitsubishi UFJ, Sumitomo Mitsui) benefit from rate normalization. For international portfolios, partial hedging on USD/JPY becomes relevant despite its cost.

Risks & blind spots

A surprise intervention by the BOJ or MoF in the foreign exchange market (as in 2022, one of the most costly yen interventions in history) can violently reverse carry positions within hours. The risk of contagion to Asian emerging markets remains underestimated by Western investors focused on developed markets.

To watch

Next BOJ meeting (July 2026). USD/JPY around 155-160: critical zone for potential intervention. Japanese inflation for May-June. PBOC’s stance on the yuan (competitive devaluation vs. stability). Outflows from specialized carry funds.