US Treasury's Yen Intervention Sparks Concerns Over Debt and Asset Volatility

The US Treasury's recent intervention in the foreign exchange market has had unexpected consequences for both Japan and the US.

The US sold euros to boost the value of the yen, which rose against the US dollar after the intervention.

This move has cast a spotlight on the high levels of debt held by these two financial superpowers. Japan's ministry of finance projects that its debt service costs will rise to 30% of total expenditure by 2029-30, up from just a quarter last year.

The US Treasury secretary's decision to prop up the yen may have been driven by self-interest, as it helps keep Washington's borrowing costs down. However, this intervention has also sparked concerns about asset volatility in financial markets.