US shakes up currency markets with unusual yen-buying via selling euros

The U.S. Treasury Department has recently introduced an unusual tactic to bolster the Japanese yen, by simultaneously buying yen and selling euros. This unprecedented move comes in response to Japan's own currency market intervention earlier in the week. The Treasury department's decision not to sell dollars, despite the current inflation concerns, suggests a desire to prevent a weaker dollar, which would complicate efforts to control inflation.

Analysts speculate this could be a coordinated effort among major economies to strengthen the yen, though such an event would be very low probability but high impact if it were to materialize.