From "tacit approval" to "personally stepping in"—why is the U.S. getting involved in the yen issue at this moment?

From "tacit approval" to "personally stepping in"—why is the U.S. getting involved in the yen issue at this moment?

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Last Friday, the New York Fed made inquiries about the USD/JPY exchange rate, causing the rate to drop by about 1.6%. The possibility of joint US-Japan intervention to curb the overly strong dollar or rapidly depreciating yen has increased.

According to Chasewind Trading Desk, a research report by Bank of America Securities team led by Alex Cohen, released on January 25, stated that this move represents a key shift in the US foreign exchange policy stance. The US may intend to suppress dollar appreciation to improve trade competitiveness, maintain the stability of US Treasury bonds, and increase bargaining chips in diplomacy with Japan.

At the same time, with Japan’s general election approaching, US-Japan cooperation to stabilize exchange rates may be aimed at giving Prime Minister Sanae Takaichi’s government more time during the election window and avoiding volatility in the Japanese stock market. The action seeks to keep the exchange rate within a politically acceptable range rather than to immediately drive the yen to very high levels.

Key Shift in US Foreign Exchange Policy

Bank of America Securities pointed out that last Friday’s event broke the market’s conventional expectations of the US “hands-off” stance. Previously, the market generally expected that after US Treasury Secretary Yellen commented on recent exchange rate moves, the US would merely tacitly allow Japan’s Ministry of Finance to intervene as needed.

However, the New York Fed’s trading desk’s direct involvement has changed this expectation. Over the past fifteen years, despite large swings in the yen, the US mainly participated through joint G7 statements or tacit attitudes, with few reports of direct actions.

The Bank of America Securities team led by Alex Cohen emphasized in the report that if this "rate check" is true, it marks a more aggressive posture from the US Treasury under this administration than in decades past. This follows last fall’s direct US intervention in support of the Argentine peso, showing that the US is more willing to use foreign exchange policy as part of its broader diplomatic and economic policy toolkit.

Why Did the US Take Action? Three Potential Motivations

Understanding the motivation for the US Treasury’s intervention is critical. The Bank of America report outlines three possible strategic objectives behind the US move:

1. Preventing dollar appreciation. The US may aim to suppress the dollar exchange rate to boost trade competitiveness. If this is the main motive, it means wider downside risks for the dollar ahead.

2. Maintaining stability in the US Treasury market. If Japan acts alone, it may need to sell US Treasuries to fund reserves. By supporting the yen, the US can help stabilize the Japanese government bond (JGB) market and reduce spillover risks to its own Treasury market.

3. Increasing diplomatic leverage with Japan. As a diplomatic tool, this move seeks to support its important ally Japan, especially as Japan has pledged $550 billion in investment in the US and may increase defense spending. The US aims to trade currency policy coordination for cooperation on broader policy goals.

Japan’s Appeal: Market Stability Ahead of the Election

For the Japanese government, the core concern now is the stability of the exchange rate and stock market. The Bank of America report notes that Prime Minister Sanae Takaichi’s administration may want the USD/JPY exchange rate to remain in the 145–155 range in the short term, with a medium-term retreat to 135–145, which is seen as more consistent with fundamentals and interest rate differentials.

Yet, as the February 8th election approaches, the Japanese government does not want the yen to appreciate excessively. Sharp exchange rate fluctuations could trigger a major correction in the Japanese stock market, which would be unfavorable for the election. At the same time, an overly strong yen would make the central bank more cautious in re-anchoring inflation expectations.

Therefore, the US-Japan joint “rate check” is more likely intended to buy time for Sanae Takaichi’s administration during the election window and keep the exchange rate within a politically acceptable range, rather than immediately driving the yen much higher.

Looking forward, Bank of America Securities expects that the Fed and US Treasury’s move will keep USD/JPY below 160 in the short term, particularly ahead of Japan’s February 8 election. If the pair again tests recent highs, the risk of joint interventions, including by the US, will rise significantly.

However, analysts also warn that although the Bank of Japan is expected to hike rates twice by 2026 and the Fed to cut rates twice—both helping to support the yen—given the strong US economy and Japan’s structural capital outflows, the upward trend in USD/JPY may resume later. In this context, as long as US inflation remains controlled, the possibility of further coordinated intervention will continue.

For investors, this means that a simple one-way short yen strategy is no longer safe, and constant vigilance is needed against dual policy resistance from Washington and Tokyo.

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The above excellent content comes from Chasewind Trading Desk.

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Risk Warning and DisclaimerThere are risks in the market, and investment should be cautious. This article does not constitute personal investment advice, nor does it take into account the specific investment objectives, financial situation, or needs of individual users. Users should consider whether any opinions, viewpoints, or conclusions in this article are suitable for their particular circumstances. Investment is at your own risk.

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