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

The U.S. Treasury, in a highly unusual move, reportedly sold euros for yen in response to Japan's yen-buying intervention, according to reports. This unusual dynamic comes as the U.S. seeks to support Japan's efforts to strengthen the yen, while avoiding a potential softening of the dollar, which could exacerbate inflation concerns.

Analysts noted that the move was "a highly unusual — maybe unprecedented — step," as it avoids signaling a desire for broad-based dollar weakness. The yen, which has recovered from 40-year lows, has strengthened by almost 4% against the dollar last week. Japan's Ministry of Finance also intervened in the markets on Thursday and again on Friday, with the U.S. Treasury's intervention potentially avoiding the appearance of a broader dollar weakness.

However, the extent of the U.S. Treasury's intervention and its impact on the euro remains to be seen.