日圓套息活動拆倉, 日圓對美元急升. Why 其他高息貨幣對美元下跌?

The case will not oftenly occur, because if Yen become stronger, which means to all other currency may depreciate, whereas it really depends what the currency the investor is holding, but usually is USD, therefore it proves why USD will depreciate when carry trade active, however, sometimes other currency may need to sold for Yen, therefore, USD to such currency is being sold badly may rise