Japan possesses alternative tools to defend the yen without liquidating its more than $1.1 trillion US Treasury portfolio, according to Citigroup Inc. The analysis comes as the country's short-term debt holdings run low, limiting one traditional avenue for currency intervention. Citi strategists note that Tokyo can tap other resources, including its vast foreign exchange reserves and short-term dollar assets, to support the yen if needed. This assessment reduces market concerns that defending the currency would force a disruptive selloff of Treasury holdings, which could roil global bond markets. The Bank of Japan and Ministry of Finance have historically coordinated on intervention, using dollar sales funded by reserves.

With short-term bills diminishing, the focus shifts to longer-dated reserves and swap lines. Officials have signaled readiness to act against excessive volatility, and Citi's research underscores that the financial capacity remains robust without jeopardizing the $1.1 trillion Treasury position.