The Japanese yen continued to weaken against the US dollar, recording its largest single-day drop in over two months on Monday, falling 1%. The appreciation effect brought by the joint intervention by Japan and the United States in late July has almost been exhausted. On Tuesday, the yen touched 159.39, stabilizing around 159.22 during the New York session. The market widely expects that once the yen effectively breaks the 160 mark, it will trigger another intervention by the authorities. Japanese and US officials have previously made it clear that they will take action again if necessary, but analysts warn that without substantial policy follow-up, the effect of intervention will be difficult to sustain.