US Treasury Joins Japan in Coordinated Yen Intervention

The US Treasury joined Japan in a coordinated effort to support the yen after Tokyo's Ministry of Finance confirmed it purchased yen in coordination with Washington on July 31. The operation, which saw the Bank of Japan spend up to $96 billion over two days, was aimed at countering months of excessive volatility and disorderly movements in the currency market.

The intervention marked Washington's first coordinated yen-buying effort with Japan since 1998 and its first foreign-exchange intervention since 2011. US Treasury Secretary Scott Bessent stated that his government remains attentive to developments and prepared to intervene again if necessary.

Japan's decision to support the yen reflects the wider financial risks created by Tokyo's currency decline, particularly with regards to the country's significant holdings of US Treasuries. At the end of May, Japan held $1.14 trillion in US government securities, making it the largest foreign holder of Treasuries.

The rise in Japanese yields could encourage Japanese banks, insurers, and pension funds to retain more capital at home rather than investing overseas, potentially reducing demand for US bonds and other global assets.