Japan Likely Sold Treasurys to Finance Record Yen Support
Japan’s foreign-securities holdings fell by $87.8 billion in August, close to the scale of its recent intervention to support the yen.[3] Authorities spent a monthly record ¥15.4 trillion ($98.6 billion) through Aug. 26, with part of the operation conducted jointly with the US.[3]
Japan’s foreign-securities holdings fell by $87.8 billion in August, close to the scale of its recent intervention to support the yen.[3] Authorities spent a monthly record ¥15.4 trillion ($98.6 billion) through Aug. 26, with part of the operation conducted jointly with the US.[3]
Why it matters: Selling reserve assets can transmit Japan’s currency defense into the US Treasury market, although Tokyo retains substantial reserves and has access to a facility designed to provide dollars without requiring Treasury sales.[3]
Key insights: Market participants estimate that roughly 70% of Japan’s foreign reserves are invested in US Treasurys, although the official data does not detail securities or maturities.[3] | Japan’s foreign-currency reserves fell by $94.6 billion to $995 billion at the end of August, while foreign-currency deposits declined by $6.9 billion.[3] | The Foreign and International Monetary Authorities Repo Facility can provide Japan with up to $60 billion per day without Treasury sales.[3]
Cheatsheet facts: What changed: Japan’s foreign-securities holdings recorded an $87.8 billion monthly decline following record yen intervention.[3] | Why now: Authorities deployed ¥15.4 trillion through Aug. 26 to support the yen, including a joint operation with the US.[3] | Watch next: Monitor Finance Ministry reserve data and any disclosed use of the Foreign and International Monetary Authorities Repo Facility during further intervention.[3]

Japan’s foreign-securities holdings fell by $87.8 billion in August, close to the scale of its recent intervention to support the yen.[3] Authorities spent a monthly record ¥15.4 trillion ($98.6 billion) through Aug. 26, with part of the operation conducted jointly with the US.[3]
Why it matters: Selling reserve assets can transmit Japan’s currency defense into the US Treasury market, although Tokyo retains substantial reserves and has access to a facility designed to provide dollars without requiring Treasury sales.[3]
Key insights: Market participants estimate that roughly 70% of Japan’s foreign reserves are invested in US Treasurys, although the official data does not detail securities or maturities.[3] | Japan’s foreign-currency reserves fell by $94.6 billion to $995 billion at the end of August, while foreign-currency deposits declined by $6.9 billion.[3] | The Foreign and International Monetary Authorities Repo Facility can provide Japan with up to $60 billion per day without Treasury sales.[3]
Cheatsheet facts: What changed: Japan’s foreign-securities holdings recorded an $87.8 billion monthly decline following record yen intervention.[3] | Why now: Authorities deployed ¥15.4 trillion through Aug. 26 to support the yen, including a joint operation with the US.[3] | Watch next: Monitor Finance Ministry reserve data and any disclosed use of the Foreign and International Monetary Authorities Repo Facility during further intervention.[3]