Even though the dollar index (yellow) rose due to dollar purchases from currencies other than the US, US bonds were bought at the same time, and interest rates (purple) on US10Y declined. Nevertheless, the dollar-yen exchange rate (green) remained stable. I was surprised that it was different from usual. At the moment when a slight phase difference occurred and the dollar-yen exchange rate began to fall, it seemed that the FX team woke up, and the dollar yen plummeted. After that, it vibrated a few times, and then gradually returned to normal.