US, Japan May Need New Yen Intervention as Rate Gap Persists
A joint US-Japan intervention weeks ago failed to shore up the yen. Another effort may be needed as US Treasury yields fuel the global yen carry trade, analysts say.

Yen Weakness Continues
Japan and the United States may launch another joint currency intervention. A rare, coordinated effort weeks ago failed to sustain the yen's recovery. The Japanese currency had fallen to a 40-year low in late July, trading above 163 per US dollar. That earlier intervention briefly halted its decline. However, the yen has since reversed half those gains, now nearing the 160 per US dollar threshold again.
Carry Trade Fuels Decline
The deepening US Treasury rout fuels the global yen carry trade. A carry trade involves borrowing a low-interest currency to invest in a higher-yielding one. US Treasury yields have risen to multi-year highs. This pushes up US borrowing costs. It also makes a persistent US-Japan interest rate gap more likely. This differential continues to favour the US dollar.
Rate Differential Dominates
Intervention can shift market positioning, but it does not change fundamental interest rate differences, noted Gary Dugan. Dugan, CEO of The Global CIO Office, advises high-net-worth investors. He stated that the yen's continued drift lower, despite a more hawkish Bank of Japan and direct intervention, shows investors still prioritise US yields.
The 30-year US Treasury yield closed at 5.285% on Tuesday. This compares to the 30-year Japanese government bond rate of 4.141%.
Continued yen weakness poses challenges for regional economies. Japanese exports become cheaper, potentially pressuring competitors in other Asian markets. The persistent yen carry trade demonstrates global capital flows favouring higher US yields. This could divert investment from other Asian assets.
Companies with significant yen-denominated costs or revenues will face ongoing currency volatility and risk management issues.
This article is journalism, not investment advice; consult a licensed professional before making financial decisions. Market data is indicative, may be delayed, and should be verified with your broker or exchange before use.
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