Last month, Japan and the U.S. jointly intervened to support the yen after it hit its weakest level since the 1980s. The action provided temporary relief, lifting the currency to 155.23 per dollar, but the momentum faded. The yen now hovers near 160, as structural challenges persist.
The primary obstacle remains Japan's ultra-low interest rates compared to other developed nations, fueling carry trades where investors borrow in yen to seek higher returns abroad. Geopolitical tensions driving up oil prices have compounded the pressure.
"The intervention addressed speculative positions but didn't resolve underlying issues like energy costs or rate disparities," noted Masahiko Loo, a senior strategist at State Street Investment Management.
Markets currently assign an 80% probability to a Bank of Japan rate increase in September, with certainty by October. BOJ Deputy Governor Ryozo Himino recently signaled openness to tightening policy as early as next month.
However, analysts caution that one hike may not be enough to reverse the yen's downtrend. "With a September move already priced in, sustained yen strength would require signs of faster-than-expected policy normalization," explained Masayuki Nakajima of Mizuho Bank.
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The yen's weakness reflects broader macroeconomic forces. Japan's inflation remains subdued compared to the U.S., where the Fed has maintained higher rates to combat price growth. This divergence keeps the dollar dominant in global markets, overshadowing Japan's efforts to stabilize its currency.
Without intervention, traders speculate the yen could have plunged toward 170 per dollar. While the coordinated action slowed its decline against the greenback, the currency has lost more ground against peers like the euro and Australian dollar.
All eyes are on Federal Reserve Chair Jerome Powell's upcoming remarks at the Jackson Hole symposium for clues on U.S. monetary policy. Recent Fed meeting minutes revealed that several officials supported a rate hike last month, with many emphasizing the need for further tightening if inflation persists.
"The intervention achieved its short-term goal, but its durability is questionable," analysts noted.
The bottom line: While the yen's depreciation has been gradual, risks remain from elevated oil prices and U.S. yields. Officials stand ready to act again, but repeated interventions may yield diminishing returns.