Analysts pointed to concerns about U.S. Treasury markets and the stability of Japan’s financial system. The yen slid to 163.73 per dollar last Thursday before rebounding to 157.57 on Friday. The coordinated intervention was the first U.S.-Japan joint operation to buy yen since 1998. Manuel Augusto Moreno | Moment | Getty Images Stock chart icon 
Japan yen performance year-to-date
Japan yen performance year-to-date
Industry veterans told CNBC that one of Washington’s biggest concerns was avoiding a scenario where Japan would need to dump large quantities of
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