At the opening of the Asian trading session, the USD/JPY exchange rate hovered near the 162.50 level. Coinciding with a public holiday in Japan, Tokyo markets were closed, drawing traders' attention to potential currency market intervention by the Japanese government. There is widespread concern that Tokyo may choose to intensify support for the yen during a window of relatively thin liquidity in the Asian market.
Although Tokyo markets were closed, yen trading continued in Singapore, Hong Kong, and the Australia-New Zealand markets. However, liquidity during these sessions is typically lower than during normal Tokyo trading hours. It is precisely this decline in liquidity that has kept market nerves on edge. Historical experience indicates that Japanese holidays often amplify yen volatility. Traders fear authorities might exploit this window of insufficient market depth to drive yen appreciation through intervention. In a low-volume environment, capital of the same scale often generates a larger price impact. The Japanese government has previously adopted similar strategies, taking action during periods of low liquidity or even on holidays to maximize the shock effect of the intervention.
The current market environment is reminiscent of Japan's largest exchange rate intervention to date. After the USD/JPY broke through the politically sensitive 160 level, the Japanese Ministry of Finance deployed a record 11.73 trillion yen in foreign exchange intervention. This marked the first yen-buying action since July 2024, with a scale almost double that of the previous maximum intervention. However, even with such massive capital deployment, the USD/JPY rate breached the intervention level again after approximately six weeks.
This outcome highlights a practical reality: with the interest rate differential between the US and Japan remaining vast and the market continuing to bet on USD strength, it is becoming increasingly difficult for Japan to reverse the yen's depreciation trend in the long term. With USD/JPY once again trading above 160 and Tokyo markets closed today, the market is assessing whether the Japanese government will use this quiet window to send a signal. Such actions could include intensified verbal warnings or direct market purchases of yen. Given that the previous large-scale intervention was ultimately swallowed by market forces, traders generally believe that if Japan takes action today, it is more likely intended to buy time rather than establish a sustainable bottom for the yen's appreciation.
