US-Japan Intervention Rattles Dollar Reserve Dominance

The US Treasury and Japan's Finance Ministry recently conducted their first joint currency operation in over 15 years, intervening to strengthen the yen.

Japanese authorities spent around ¥14 trillion [$88 billion] over two days to support the currency, but analysts said the impact may be temporary without broader economic changes.

A lasting recovery of the yen would likely require tighter monetary policy, although Japan's Bank of Japan has kept its benchmark interest rate at 1% amid concerns over weak consumer demand.

The intervention came as Washington sought to avoid adding further strain to the US Treasury market by selling dollars. Instead, they used euros to support the yen and avoided large-scale sales of US debt.