Yen Intervention Sparks Concerns Over US Treasury Yields

The recent intervention in the Japanese yen has sparked a link between yen pressure and US Treasury yields. The connection is not yet clear, but analysts warn of potential negative feedback into Treasuries if more support for the yen is given.

A key factor is the Bank of Japan's policy rate, which remains lower than neutral according to estimates. This has led to a weak yen and elevated long-dated yields, with the 30-year yield above 4%. Rate hikes could ease this tension, but that would also have economic implications.

The Treasury Secretary's unusual decision to buy euros instead of selling US dollars may be related to concerns about US Treasury sales. Analysts warn of a potential negative feedback loop if further intervention is undertaken, particularly if the European Central Bank responds by selling US Treasuries.