Despite a rare show of unified action between the United States and Japan to boost the yen, fundamental disagreements between US Treasury Secretary Scott Bessent and Japanese Prime Minister Shigeru Ishiba regarding the Bank of Japan's policy could weaken the effectiveness of their joint efforts.
Over the past year, Bessent has consistently signaled his belief that tightening monetary policy is essential for reversing the yen's weakness. In contrast, Ishiba has long been wary of interest rates rising too high or too quickly, fearing such a move could stifle Japan's economic rebound, a recovery that has excited global investors.
Since Ishiba took office last October, the BOJ has raised rates twice, yet the benchmark rate remains at a low 1%. Last month, on the same day the US intervened in the currency market for the first time since 1998 by buying yen, the BOJ chose to hold steady. This contradictory signal runs counter to historical experience in modern financial markets, which shows that policymakers often need a multi-pronged approach to decisively shift market sentiment.
Peter Vassallo, a portfolio manager at BNP Paribas Asset Management USA, described that week as a "golden opportunity" that was missed. He made his comments as the yen retreated from the highs reached after the joint US-Japan intervention, once again approaching the psychologically significant level of 160 yen to the dollar.
Markets are now increasingly pricing in another BOJ rate hike in September or October. For a country that only recently ended the world's last negative interest rate policy, this would be a bold move. The last time Japan raised rates three times within a 12-month period was in 1989, at the height of the country's asset bubble.
Mark Dowding, Chief Investment Officer of Fixed Income at RBC Global Asset Management, noted that Ishiba wants to maintain loose policy to maximize economic growth, but a weak yen threatens her approval rating by fueling inflation. He added, however, that if the BOJ does not raise rates and the yen falls further, "the market will consider the intervention a failure."
In response to a question about whether Bessent's views on the BOJ conflict with Ishiba's position, a US official stated that Bessent has consistently emphasized the importance of prudent monetary policy and clear communication. The official said the US and Japan remain highly aligned on maintaining a strong bilateral economic relationship and continuing consultations on exchange rate issues, including limiting excessive volatility.
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