Why did the US intervene to support Japan's struggling yen? - analysis
The intervention helped the currency gain around 5%, lifting it from nearly 164 yen per dollar to about 155
Assessment
US intervention to prop up Japan's yen is rare, signaling concern that the currency's slide could destabilize global trade. The roughly 5% strengthening from 164 to 155 yen per dollar shows the move had immediate market impact. The next question is whether the yen will hold those gains or need further support.