U.S. buys Japanese yen as it drops to a 40-year low CTV NewsYen holds gains after Japan, U.S. conduct intervention to prop up currency The Globe and MailKatayama Says US Evaluates Japan’s Economic Policies Highly Bloomberg.comUS Treasury undertakes historic intervention in yen market Financial TimesWhy the U.S. stepped in after decades to prop up Japan’s yen — and what’s at stake CNBC