Japan's finance minister repeatedly emphasizes "discretion," hinting that the US supports intervention in the yen and does not want to see a collapse in Japanese government bonds?
Japanese authorities are raising their verbal warnings about the yen's depreciation to unprecedented levels.
Finance Minister Katayama Satsuki repeatedly emphasized that Japan has “discretionary power” (free hand) to take “bold actions” against exchange rate fluctuations that deviate from fundamentals. The market has interpreted these tough statements as signs that Japan is determined to intervene in the currency market, and may even have tacit approval from the United States.
This signal appears at a delicate moment when both the yen and Japan's bond market are under pressure. Despite the Bank of Japan’s recent first rate hike in thirty years, the yen/dollar exchange rate has fallen rather than risen, hovering around 157.49. Meanwhile, the combination of a weak yen and expectations of massive fiscal stimulus has pushed the yield on 10-year Japanese government bonds to a 27-year high of 2.1%, sparking deep market concerns about financial stability.
Investors believe that the tough language from Japanese officials, especially the “discretionary power” reference, has shifted market focus to two key questions: Will Japan intervene soon? And does this action have a “green light” from Washington? In a recent report, Nomura Securities analyst team led by Yujiro Goto noted that the 160 level of the dollar/yen pair may be the key threshold for actual intervention.
Latest market data shows that after verbal intervention by the Japanese finance minister, the yen rebounded and is currently around the 156 level.
“Free hand” may have received the U.S. “green light”
Finance Minister Katayama Satsuki’s repeated mention of “discretionary power” has been interpreted by analysts as possibly having gained U.S. support for intervention. In its December 23 report, Nomura Securities analyzed that this wording has multiple considerations behind it.
First, Finance Minister Katayama Satsuki directly tied his statement of “free action” to the recent joint statement by the U.S. and Japanese treasury secretaries.
According to the report, during a Bloomberg interview on December 22, Katayama referenced the joint statement signed in September by his predecessor and U.S. Treasury Secretary Yellen, stating authorities will “take bold action” and claiming a “free hand” regarding intervention. Nomura analysts believe this language is a clear upgrade compared to previous statements like “responding appropriately.”
Second, Nomura analysis points out that U.S. possible acquiescence stems from concerns about global financial stability.
The continued depreciation of the yen has caused turmoil in Japan’s government bond (JGB) market, and instability in the JGB market could spill over into overseas markets, including U.S. Treasuries (USTs), via complex financial chains. Therefore, supporting Japan’s currency intervention to stabilize its bond market aligns with U.S. interests. Additionally, with U.S. rate cuts and Japan raising rates, yen depreciation can more easily be characterized as a deviation from fundamentals, providing stronger justification for intervention. The market is closely watching for any future remarks from U.S. Treasury Secretary Yellen or other officials on this issue.
Verbal intervention escalates, 160 level becomes market focus
Verbal intervention by Japanese authorities has notably escalated, raising market alertness to a high level. According to Nomura Securities, Katayama Satsuki’s language such as “discretionary power” and “bold action” is a definite upgrade compared with the previously common “responding appropriately.”
In addition to the finance minister, other officials have joined in voicing warnings. According to the Financial Times, Japan’s Vice Minister for International Affairs Atsushi Mimura also expressed “deep concern” about “one-sided” and “sudden” fluctuations in the yen. Nomura believes that Atsushi Mimura, who previously rarely commented on exchange rates, coming forward further highlights authorities’ high alert over yen weakness.
These tough statements have led market participants to generally believe that the 160 level of dollar/yen is a psychological barrier where authorities may actually intervene.
Nomura’s chief FX strategist Yujiro Goto said that if officials use terms such as “disorderly” or “excessive volatility” again, markets may take this as the final signal that intervention is imminent. Notably, when Katayama was asked whether they would use the thin trading during the Christmas holiday to enter the market, he said authorities are “always ready.”
A vicious cycle between the FX and bond markets
Currently, Japanese financial markets are experiencing a vicious cycle of weak exchange rates and surging bond yields, stemming from a clash between monetary and fiscal policies.
On one hand, despite the BOJ raising its official rate to a 30-year high of 0.75%, Governor Kazuo Ueda failed to signal a strong path of future tightening at the subsequent press conference, disappointing the market and triggering yen selling. Persistent yen depreciation is raising the price of imported goods and worsening domestic inflation pressure, forcing markets to expect the BOJ will hike rates faster.
On the other hand, the new government under Prime Minister Sanae Takaichi is working to stimulate the economy through aggressive fiscal spending. According to local media, the new fiscal year budget may expand to a record 120 trillion yen. Previously, Japan just approved an extra budget of 18.3 trillion yen. Such large-scale fiscal expansion means more bond issuance, directly impacting the bond market. The yield on the highly policy-sensitive 2-year JGB has also surged to a record high of 1.105%.
Mixed inflation data: What will the central bank do next?
The complex inflation outlook adds uncertainty to the next step of the BOJ and makes the yen’s future direction even more unpredictable.
According to BOJ data cited by Nomura, core inflation indicators for November were mixed. The trimmed mean inflation—removing outlier values—was 2.24%, steady from October and still above the BOJ’s 2% target. However, the weighted median and mode indicators slowed from 1.51% and 1.60% to 1.32% and 1.40%, respectively.
Despite some indicators slowing, overall inflation pressure remains. The 10-year breakeven inflation rate from inflation-linked bonds has risen to 1.8%. Nomura analysis believes that if the slowdown in core prices can be avoided in the first half of 2026, the chances of another BOJ rate hike around mid-year will increase, providing support for the yen. Before that, market focus will still be on whether the Finance Ministry will deliver on its “bold action” promise.
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The above highlights are from Chasing Winds Trading Desk.
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