Japan is struggling to halt another decline in the yen, with the currency giving back much of the gains achieved after an unusually coordinated intervention by Tokyo and Washington. The renewed weakness is raising questions about whether market intervention alone can stabilize the currency as investors increasingly focus on Japan’s interest rates, government spending and fiscal outlook.
The yen has moved back toward the ¥160-per-dollar level after briefly strengthening sharply following the U.S.-Japan intervention. The operation pushed the dollar down from around ¥164 to about ¥156, but the effect has faded as traders resumed selling the Japanese currency.
The latest decline highlights the difficulty facing Japanese authorities. Intervention can temporarily reduce speculative pressure, but it does not address the underlying differences between Japan and the United States. U.S. Treasury yields remain significantly higher than Japanese yields, encouraging investors to borrow cheaply in yen and put their money into higher-return assets elsewhere.
That so-called carry trade has remained an important source of pressure on the yen. Japan’s benchmark interest rates are still relatively low, while U.S. 10-year Treasury yields have been around 4.7%, compared with Japanese yields below 2.9%. The wide gap makes dollar-denominated investments more attractive and reduces demand for the yen.
Fiscal policy is adding another layer of uncertainty. Investors are increasingly watching Japan’s plans for government spending and tax measures, with concerns that additional stimulus could widen the fiscal deficit and place upward pressure on long-term Japanese government bond yields.
The Bank of Japan therefore faces pressure to consider higher interest rates, but tightening monetary policy too aggressively could weaken economic growth. Markets are closely watching whether the central bank will raise rates in September and whether policymakers will signal a more decisive path toward normalization.
A weaker yen has mixed consequences for Japan. It can benefit exporters by making Japanese goods more competitive overseas, but it also raises the cost of imported energy, food and raw materials, putting pressure on households and businesses.
The renewed decline suggests that restoring lasting strength to the yen will require more than currency-market intervention. Unless the underlying interest-rate and fiscal pressures change, traders may continue testing Japan’s willingness and ability to defend its currency.
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