The yen has given back nearly half of the gains it made after the US and Japan intervened to support the currency, a rapid reversal that shows how hard it is for governments to control exchange rates. The retreat also puts Japan's economy back under pressure, as a weaker yen raises the cost of imported goods and adds to inflation.
The limits of intervention
The intervention, which came as the yen hit multi-decade lows, provided only a temporary cushion. Within days, the currency had surrendered a large chunk of that move. The volatility itself is a reminder that official buying and selling can't easily override the market's own momentum. The experience so far suggests that intervention alone may not be enough to change the yen's trajectory.
Currency intervention is a blunt tool. It requires significant reserves and often works only for a short time. The recent action by the US and Japan was meant to slow the yen's decline, but the partial reversal shows that market forces are still dominant. Investors are now watching to see if authorities will step in again, and at what level.
Pressure on Japan's economy
For Japan, the weaker yen is a double-edged sword. It makes exports more competitive, but it also makes imports more expensive. Japan relies heavily on imported energy and food, so a falling yen directly feeds into higher consumer prices. That adds to inflation pressures that the central bank has been trying to manage. The recent intervention was meant to slow the yen's decline, but the partial reversal means those import costs are likely to stay elevated.
The impact is already visible in the cost of everyday goods. As the yen weakens, the price of imported wheat, oil, and other commodities rises, pushing up the cost of living for households. This is a particular concern for a country that has long struggled with deflation and is now facing the opposite problem.
The next move from Tokyo will be closely watched, as the currency's slide resumes. Whether authorities choose to intervene again, and how they balance the need to support the yen against the cost of doing so, remains an open question.
