Bank of America analysts said Thursday that a potential intervention by Japan’s Ministry of Finance to support the yen may be less enduring than past efforts, even as the dollar-yen exchange rate remains north of 160.
The bank highlighted 162 to 165 as the most likely band for intervention on USD/JPY, while acknowledging that the exact trigger point is uncertain.
Five limiting factors
In outlining why any intervention might lack durability, Bank of America cited five specific constraints:
- U.S. interest rate support for the dollar - Ongoing higher U.S. rates continue to underpin the dollar. The bank noted that elevated oil prices and resilient U.S. growth are keeping expectations for rate cuts further into the future. By contrast, previous interventions in October 2022 and July 2024 were aided by falling U.S. rates.
- Rising crude oil prices - Higher oil costs are expected to widen Japan’s trade deficit and further skew yen supply-demand dynamics in favor of the dollar, according to the analysis.
- Speculative positioning is not extreme - Current short positions in the yen are not stretched. The bank contrasted today’s stance with July 2024, when carry trades among Commodity Trading Advisors had produced a significant build-up of yen shorts. Commodity Futures Trading Commission data cited by the bank shows no excessive short positioning at present.
- Policy stance under the Takaichi administration - Markets view the administration as dovish on both fiscal and monetary policy, which the bank says raises barriers to structural policy moves that would materially strengthen the yen. At the same time, long-term yields in the Japanese government bond market continue to face upward pressure.
- Reserve usage and funding links - Japan’s foreign exchange reserves, roughly near $1.4 trillion, are a source of funding for U.S. investment under bilateral arrangements. The bank notes that markets may see this as constraining the pool of reserves available for intervention, with about half of up to $550 billion in U.S. investment potentially financed through these reserves.
The analysts' view places the likely intervention window at 162 to 165 but stresses uncertainty over the precise level that would prompt action. They argue that, given the current macro and market dynamics, any Ministry of Finance effort to stem dollar strength could face significant headwinds and therefore may not last as long as past interventions.
Details in the bank's assessment emphasize how external forces - notably U.S. interest rate dynamics and commodity prices - as well as domestic policy orientation and the composition of reserves, combine to limit the potential durability of Japanese intervention in the FX market.