US and Japan Unleash Rare Joint Intervention in Currency Markets

The U.S. and Japan have jointly intervened in currency markets to prop up the weak yen, but the move has left traders scrambling to understand a new dynamic: the U.S. selling euros as part of the intervention.

According to analysts at HSBC, this is 'a highly unusual, maybe unprecedented, step.' The Financial Times reported that on Friday, the U.S. Treasury bought yen for euros, rather than buying yen and selling dollars as one might expect.

This move likely reflects a desire by U.S. authorities to help Japan strengthen the yen without encouraging a view that Washington wants a softer dollar, which could complicate efforts to rein in above-target inflation.