Japan's historic joint intervention with the US is shifting market focus to whether the yen can strengthen beyond 155 per dollar, a threshold strategists view as a key test for the rally's staying power.
The level carries significance far beyond standard technicals. Japan's April and May interventions briefly dragged dollar-yen toward 155 before it resumed climbing, reinforcing views that official action merely buys time.
Now, investors are weighing whether a clean break below it signals a structural shift.
Steve Englander, Global Head: G10 FX Research at Standard Chartered, discusses the move to intervene and what it means for global currencies.