- Japan's Finance Minister, Katayama Satsuki, confirmed that the US and Japan are maintaining close communication on exchange rate policies, suggesting that the US is tacitly allowing intervention in the yen.
- Market traders have reduced their bets on a significant rebound of the yen in the near term. After the announcement, the dollar slightly strengthened against the yen, failing to reach a key psychological level.
- A Citigroup analysis report indicates that Japan's intervention fund limit could reach 30 trillion yen, aiming to curb the momentum of yen depreciation by depleting foreign exchange reserves.
Marginal Changes in US-Japan Exchange Rate Policy Coordination
The meeting between Japan's Finance Minister Katayama Satsuki and US Treasury Secretary Besent in Tokyo sent a clear signal. Katayama noted that both parties reaffirmed the consensus from last September's joint statement on addressing excessive volatility in the foreign exchange market. This statement carries significant policy weight during the current sensitive exchange rate period. Although Besent had previously expressed reservations about direct intervention, the meeting confirmed good coordination between the two sides. This verbal alignment has largely alleviated market concerns about potential rifts in US-Japan monetary policy.
From a policy logic perspective, the US understanding is that Japan's Ministry of Finance has gained a valuable intervention window. If market volatility exceeds established standards, Japanese officials have the right to act under the G7 framework. However, this understanding is not unconditional. The US prefers to see the Bank of Japan support the yen through tight monetary policy rather than solely relying on depleting foreign currency assets. This nuanced policy stance requires the market to observe the Bank of Japan's interest rate path expectations when assessing intervention risks.
Citibank's Intervention Scale Estimates and Funding Path
According to the latest estimates by Citigroup (C:US) strategists, Japanese authorities may use up to 30 trillion yen in their battle to prevent yen depreciation. This figure is derived from Japan's current foreign exchange reserves of over 1.3 trillion dollars and historical intervention intensity. If the Ministry of Finance accepts a decline in foreign exchange reserves consistent with the proportion from 2022 to 2024, there remains approximately 20 trillion yen of intervention space. Previously, the market widely speculated that officials had invested about 10 trillion yen in recent days.
In terms of specific operational paths, Japanese authorities face a complex balancing act. To avoid causing severe shocks to the US bond market, the funding for intervention may rely more on short-term deposit pools rather than large-scale sales of medium- to long-term US Treasury bonds. Citibank's analysis suggests that this gradual fund deployment aims to suppress speculative short positions rather than reverse long-term trends determined by interest rate differentials. If these administrative measures are not accompanied by a substantial shift in monetary policy, their marginal utility may diminish as funds are consumed.
Market Reaction and Liquidity Monitoring
After Katayama Satsuki's press conference, the yen's performance did not strengthen as expected but instead showed a slight retreat. This reaction chain indicates that traders initially expected a more formidable joint action statement from the US and Japan. Although the current level of communication confirms the legitimacy of intervention, it does not provide new, stronger intervention tool explanations. The dollar's fluctuation against the yen in the 155 to 158 range reflects the market testing the official bottom line.
Liquidity data monitoring shows that Japanese importers, especially small and medium-sized enterprises, continue to have strong demand for foreign exchange purchases. Citibank strategists warn that if intervention measures successfully suppress the dollar against the yen below 155, it may temporarily curb the release of this rigid demand. Conversely, if the exchange rate remains volatile around 160, cost-driven foreign exchange purchase pressure will continue to weigh on the yen. Offshore market trading volumes in the coming days will be a key indicator of the intervention's effectiveness.
