Yen Surges 5% in a Week as Markets Bet on Faster BOJ Tightening

The yen gained nearly 5% versus the dollar in the week through September 8, 2026, hitting a seven-month high. Reuters links the rally to expectations of faster Bank of Japan rate hikes — markets now price 68% odds of a September move. The BOJ last raised its policy rate to 1.0% in June from 0.5%. A 5% weekly swing in a major currency is unusually large.