US and Japan Launch Coordinated Intervention to Bolster Yen

The United States and Japan conducted a coordinated currency intervention on July 31, buying the Japanese yen in a joint effort to stabilize its value, according to an analysis by BofA Global Research. The move signals a unified front by monetary authorities to support the beleaguered currency after previous unilateral actions by Japan failed to durably strengthen it.

What Happened

The immediate goal of the intervention was to push the dollar-yen exchange rate below the 155 level, which markets have come to view as a critical support line. Coordinated intervention involves two or more governments simultaneously purchasing a currency to increase its demand and signal that multiple authorities are willing to deploy their foreign exchange reserves.

Analysts noted that the scale of recent interventions may have exceeded ¥10 trillion over just three trading days. This large-scale operation puts pressure on Japan's funding mechanisms and highlights the significance of U.S. participation.

Funding the Intervention

Japan typically finances its currency operations from its massive $1.3 trillion in foreign exchange reserves. As of the end of June, these reserves included $162 billion in deposits and $929 billion in securities, a large portion of which is believed to be in U.S. Treasuries.

However, for an operation of this magnitude, Japan's Ministry of Finance may need to go beyond its typical monthly liquidity. The options include:

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• Selling securities, primarily U.S. Treasuries, from its reserves.
• Borrowing U.S. dollars from the Federal Reserve’s FIMA repo facility by using its Treasury holdings as collateral. This avoids direct bond sales that could disrupt markets, though Japan faces a $60 billion counterparty limit and relatively high costs.

The U.S. Treasury funds its participation through the Exchange Stabilization Fund (ESF). In the July action, the U.S. reportedly sold euros to purchase yen, rather than selling U.S. dollars. This preserves its dollar holdings but may require direct USD/JPY sales if euro reserves are depleted in future interventions.

Market Impact and Outlook

The joint action significantly expands the financial "firepower" beyond what Japan can deploy alone. It also sends a powerful signal to markets that could imply future policy shifts, such as an accelerated pace of interest rate hikes by the Bank of Japan or upcoming fiscal adjustments.

Following the coordinated move, currency strategists have adjusted their forecasts. According to the BofA report, the consensus year-end forecast for the USD/JPY pair has been revised downward from 152 to 149, reflecting expectations that the joint pressure will help strengthen the yen.